CN109081629B - Chlorine-free enhanced slump retaining cement grinding aid and preparation method thereof - Google Patents
Chlorine-free enhanced slump retaining cement grinding aid and preparation method thereof Download PDFInfo
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- CN109081629B CN109081629B CN201811020034.1A CN201811020034A CN109081629B CN 109081629 B CN109081629 B CN 109081629B CN 201811020034 A CN201811020034 A CN 201811020034A CN 109081629 B CN109081629 B CN 109081629B
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- sodium formate
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- 239000004568 cement Substances 0.000 title claims abstract description 116
- 238000000227 grinding Methods 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000004280 Sodium formate Substances 0.000 claims abstract description 42
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims abstract description 42
- 235000019254 sodium formate Nutrition 0.000 claims abstract description 42
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims abstract description 34
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 32
- 235000013379 molasses Nutrition 0.000 claims abstract description 31
- 239000002270 dispersing agent Substances 0.000 claims abstract description 27
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims abstract description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 19
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 229910052708 sodium Inorganic materials 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 6
- RQNVGUOKYSZUJN-UHFFFAOYSA-N [K].P1(=O)OC(CO)OP(O1)=O Chemical compound [K].P1(=O)OC(CO)OP(O1)=O RQNVGUOKYSZUJN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 3
- IYEJVYCOCVJYNV-UHFFFAOYSA-N P1(=O)OC(CO)OP(O1)=O.[Na].[Na] Chemical compound P1(=O)OC(CO)OP(O1)=O.[Na].[Na] IYEJVYCOCVJYNV-UHFFFAOYSA-N 0.000 claims description 2
- BPSYZMLXRKCSJY-UHFFFAOYSA-N 1,3,2-dioxaphosphepan-2-ium 2-oxide Chemical compound O=[P+]1OCCCCO1 BPSYZMLXRKCSJY-UHFFFAOYSA-N 0.000 claims 1
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 12
- 230000001965 increasing effect Effects 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 5
- 125000001931 aliphatic group Chemical group 0.000 abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 abstract 2
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 230000009972 noncorrosive effect Effects 0.000 abstract 1
- 229920005646 polycarboxylate Polymers 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000036571 hydration Effects 0.000 description 9
- 238000006703 hydration reaction Methods 0.000 description 9
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 6
- 229910001424 calcium ion Inorganic materials 0.000 description 6
- 230000000979 retarding effect Effects 0.000 description 6
- -1 ethylenediaminetetramethylidene Chemical group 0.000 description 5
- 229940120146 EDTMP Drugs 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- XQRLCLUYWUNEEH-UHFFFAOYSA-L diphosphonate(2-) Chemical compound [O-]P(=O)OP([O-])=O XQRLCLUYWUNEEH-UHFFFAOYSA-L 0.000 description 4
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 4
- 210000002257 embryonic structure Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 3
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002790 naphthalenes Chemical class 0.000 description 3
- 235000012207 sodium gluconate Nutrition 0.000 description 3
- 229940005574 sodium gluconate Drugs 0.000 description 3
- 239000000176 sodium gluconate Substances 0.000 description 3
- 235000019832 sodium triphosphate Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- CVIKLBFHCCGYHS-UHFFFAOYSA-N [Na].[Na].OCC(P(O)(O)=O)P(O)(O)=O Chemical compound [Na].[Na].OCC(P(O)(O)=O)P(O)(O)=O CVIKLBFHCCGYHS-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- GFEYTYKRXGPQJN-UHFFFAOYSA-N [K].OCC(P(O)(O)=O)P(O)(O)=O Chemical compound [K].OCC(P(O)(O)=O)P(O)(O)=O GFEYTYKRXGPQJN-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- RTPZMMAGRZFGBG-UHFFFAOYSA-N ethanol;propan-2-ol Chemical compound CCO.CCO.CC(C)O RTPZMMAGRZFGBG-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明提供了一种无氯增强保坍型水泥助磨剂。包括以下重量份数的组分：二乙醇单异丙醇胺2～8份，三乙醇胺6～20份，甲酸钠10～25份，有机膦酸盐缓凝剂0.5～2份，聚合物分散剂0.5～2份，糖蜜2～4份，余量水。本发明的优点是：二乙醇单异丙醇胺与三乙醇胺和甲酸钠配合使用，对水泥早期和后期强度特性均有显著的提高；有机膦酸盐缓凝剂与聚合物分散剂配伍使用，使水泥具有优异的保坍性能，与混凝土外加剂的适应性好；实际使用中，水泥早期和后期强度均提高3～5MPa，与萘系、脂肪族和聚羧酸三类减水剂的适应性都好，且水泥净浆流动度2小时不损失；并且不含任何氯离子和硫酸根离子成分，无毒、绿色环保，无腐蚀性，对人体及建筑等均没有损害。The invention provides a chlorine-free reinforced slump-preserving cement grinding aid. It includes the following components by weight: 2-8 parts of diethanol monoisopropanolamine, 6-20 parts of triethanolamine, 10-25 parts of sodium formate, 0.5-2 parts of organic phosphonate retarder, polymer dispersant 0.5 to 2 parts, 2 to 4 parts of molasses, and the balance of water. The advantages of the invention are as follows: the combined use of diethanol monoisopropanolamine and triethanolamine and sodium formate can significantly improve the early and late strength properties of cement; Cement has excellent slump retention performance and good compatibility with concrete admixtures; in actual use, the early and late strength of cement are increased by 3-5MPa, and the compatibility with naphthalene, aliphatic and polycarboxylate water reducers All are good, and the fluidity of the cement paste is not lost for 2 hours; and it does not contain any chloride ions and sulfate ions, non-toxic, green and environmentally friendly, non-corrosive, and has no damage to the human body and buildings.
Description
Technical Field
The invention relates to the technical field of cement additives, in particular to a chlorine-free enhanced slump retaining cement grinding aid and a preparation method thereof.
Background
The cement grinding aid is an innovative application technology product, and can improve the cement production efficiency, reduce the energy consumption, improve the cement quality and reduce the mixing ratio of material conveying. At present, the domestic cement grinding aids are divided into liquid and powder, and have single effect on cement, such as unobvious later strength effect of the cement with early strength effect, unobvious early strength effect with later strength effect, and cement strength can not last; the general problem that exists at present is exactly in order to reduce cement manufacturing cost, the cement factory can very big performance cement clinker characteristic, the mixed material that the fine or use quality is relatively poor of cement mill, cause the adaptability of cement relatively poor, the loss is great over time, the slump loss performance of cement is relatively poor, seriously influence its result of use in the concrete, and contain the chlorion that has corrosive effects to the construction reinforcing bar in the product now mostly, and the sulphate that influences building volume stability, seriously influence the durability of building.
Disclosure of Invention
In view of the above, the invention aims to provide a chlorine-free reinforced slump retaining cement grinding aid and a preparation method thereof. The cement grinding aid provided by the invention has a good grinding aiding effect, and the early and later strength of cement is remarkably improved; the cement slump loss resistance is excellent, the adaptability with concrete admixture is good, and the construction performance is greatly improved; and the paint does not contain any chloride ion and sulfate ion components, is nontoxic, green and environment-friendly, has no corrosivity, and does not damage human bodies and buildings.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a chlorine-free enhanced slump retaining cement grinding aid which comprises the following components in parts by weight:
2-8 parts of diethanolisopropanolamine
6-20 parts of triethanolamine
10-25 parts of sodium formate
0.5-2 parts of organic phosphonate retarder
0.5-2 parts of polymer dispersant
2-4 parts of molasses
The balance of water.
Preferably, the chlorine-free reinforced cement grinding aid comprises the following components in parts by weight:
5 parts of diethanolisopropanolamine
Triethanolamine 8 parts
15 parts of sodium formate
Organic phosphonate retarder 1 part
1 part of polymer dispersant
Molasses 2 parts
68 parts of water.
Preferably, the organophosphate retarder comprises one or more of disodium hydroxyethylidene diphosphonate, potassium hydroxyethylidene diphosphonate and sodium ethylenediaminetetramethylidene phosphonate.
Preferably, the polymeric dispersant comprises one or more of polyepoxysuccinic acid, sodium polyepoxysuccinate and sodium polyacrylate.
Preferably, the mass ratio of the organic phosphonate retarder to the polymer dispersant is (1-2): 1.
The invention also provides a preparation method of the chlorine-free enhanced slump retaining cement grinding aid in the technical scheme, which comprises the following steps:
1) weighing the following raw materials: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer dispersant, molasses and the balance of water;
2) adding the water obtained in the step 1) into a stirring tank, stirring, slowly adding sodium formate to completely dissolve the sodium formate, and continuously stirring to obtain a sodium formate solution;
3) adding diethanol monoisopropanolamine, triethanolamine, an organic phosphonate retarder and a polymer dispersant into the sodium formate solution obtained in the step 2) in sequence, and stirring to obtain a mixed solution;
4) and (3) adding molasses into the mixed solution obtained in the step 3), and stirring to obtain the cement grinding aid.
Preferably, the stirring time of the step 3) is 2 min.
Preferably, the stirring time of the step 4) is 5 min.
The invention provides a chlorine-free enhanced slump retaining cement grinding aid which comprises the following components in parts by weight: 2-8 parts of diethanol monoisopropanolamine, 6-20 parts of triethanolamine, 10-25 parts of sodium formate, 0.5-2 parts of organic phosphonate retarder, 0.5-2 parts of polymer dispersant, 2-4 parts of molasses and the balance of water. The chlorine-free enhanced slump retaining cement grinding aid takes diethanol monoisopropanolamine, an organic phosphonate retarder and a polymer dispersant as core raw materials; wherein, the diethanol monoisopropanol is matched with the triethanolamine and the sodium formate for use, which obviously improves the early and later strength characteristics of the cement; the organic phosphonate retarder is compatible with the polymer dispersant for use, has good adaptability with concrete admixture, and has good slump retaining performance; in actual use, the early strength and the later strength of the cement are improved by 3-5 MPa, the adaptability of the cement to naphthalene series, aliphatic series and polycarboxylic acid water reducing agents is good, and the fluidity of the cement paste is not lost within 2 hours; and the paint does not contain any chloride ion and sulfate ion components, is nontoxic, green and environment-friendly, has no corrosivity, and does not damage human bodies, buildings and the like. Compared with common retarders such as sodium gluconate, white sugar and sodium tripolyphosphate, the organic phosphonate retarder has the advantages of high retarding efficiency of 3-5 times, good chemical stability and temperature resistance, and good retarding effect at 250 ℃; and the calcium ion complex can form a complex with calcium ions in cement slurry, can well control the concentration of the calcium ions in a liquid phase at the initial stage of hydration, is well adsorbed on crystal embryos of a new phase of a hydration product, changes the generation speed of the crystal embryos of the hydration product in a saturated solution, and has a good retarding effect. The polymer dispersant can reduce the surface energy of particles, improve the affinity with a dispersion medium, effectively inhibit agglomeration among the particles, release interstitial water among the particles, further reduce the water consumption of the standard consistency of cement, improve the performance of the cement, improve the fluidity of the particles, and improve the surface property of cement paste, thereby increasing the dispersion performance of the cement paste, increasing the thickness of a hydrated layer on the surface of the particles, and ensuring that the paste is soft and has better fluidity. When the cement paste is compounded with the organic phosphonate retarder, an ideal synergistic effect is shown, so that the slump retaining performance of the cement paste is obviously improved.
Detailed Description
The invention provides a chlorine-free enhanced slump retaining cement grinding aid which comprises the following components in parts by weight: 2-8 parts of diethanol monoisopropanolamine, 6-20 parts of triethanolamine, 10-25 parts of sodium formate, 0.5-2 parts of organic phosphonate retarder, 0.5-2 parts of polymer dispersant, 2-4 parts of molasses and the balance of water.
The chlorine-free reinforced slump loss resistant cement grinding aid provided by the invention comprises 2-8 parts by weight of diethanol monoisopropanolamine, preferably 3-7 parts by weight, and more preferably 4-6 parts by weight. The source of the ethanol monoisopropanolamine in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the diethanol monoisopropanolamine obviously improves the early strength and the later strength of the cement.
Based on the weight parts of the diethanol monoisopropanolamine, the chlorine-free enhanced slump retaining cement grinding aid provided by the invention comprises 6-20 parts of triethanolamine, preferably 6-15 parts, and more preferably 6-10 parts. The source of the triethanolamine is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the invention, when the triethanolamine reacts with other substances in the cement, a large amount of water is consumed and heat is generated, so that the water content in the cement is reduced due to the reaction and evaporation, the water-gel ratio and the compactness of the cement are improved, and the strength of the cement is improved.
Based on the weight parts of the diethanolisopropanolamine, the chlorine-free reinforced slump loss resistant cement grinding aid provided by the invention comprises 10-25 parts of sodium formate, preferably 10-20 parts of sodium formate, and more preferably 14-16 parts of sodium formate. The source of the sodium formate is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the invention, the sodium formate is an additive without any corrosion to the reinforcing steel bar, and is used together with the diethanol monoisopropanolamine and the triethanolamine to play a mutual catalysis role, accelerate the hydration rate of tricalcium silicate in cement, improve the early strength of the cement, not attenuate the later strength, greatly improve the sulfate corrosion resistance of the cement and improve the durability.
Based on the weight parts of the diethanol monoisopropanolamine, the chlorine-free enhanced slump-retaining cement grinding aid provided by the invention comprises 0.5-2 parts by weight of an organic phosphonate retarder, preferably 0.5-1.5 parts by weight, and more preferably 0.8-1.2 parts by weight. The organic phosphonate retarder comprises one or more of hydroxy ethylidene diphosphonate disodium, hydroxy ethylidene diphosphonate potassium and ethylene diamine tetramethylene phosphonic acid sodium. The source of the organic phosphonate retarder is not particularly limited in the present invention and may be any commercially available product known to those skilled in the art. In the invention, the organic phosphonate retarder is compatible with the polymer dispersant for use, has good adaptability with concrete admixture, and has good slump retaining performance; in actual use, the early strength and the later strength of the cement are improved by 3-5 MPa, the adaptability of the cement to naphthalene series, aliphatic series and polycarboxylic acid water reducing agents is good, and the fluidity of the cement paste is not lost within 2 hours; compared with common retarders such as sodium gluconate, white sugar and sodium tripolyphosphate, the retarder has the advantages of high retarding efficiency of 3-5 times, good chemical stability and temperature resistance, and good retarding effect at 250 ℃; the calcium ion-containing aqueous solution can form a complex with calcium ions in the cement slurry, can well control the concentration of the calcium ions in a liquid phase at the initial stage of hydration, is well adsorbed on crystal embryos of a new phase of a hydration product, changes the generation speed of the crystal embryos of the hydration product in a saturated solution, and has a good retarding effect; when the cement paste is compounded with a polymer dispersant, an ideal synergistic effect is shown, and the slump retaining performance of the cement paste is obviously improved.
Based on the weight parts of the diethanol monoisopropanolamine, the chlorine-free enhanced slump retaining cement grinding aid provided by the invention comprises 0.5-2 parts by weight of a polymer dispersant, preferably 0.5-1.5 parts by weight, and more preferably 0.8-1.2 parts by weight. The polymer dispersant of the invention comprises one or more of polyepoxysuccinic acid, sodium polyepoxysuccinate and sodium polyacrylate. The source of the polymeric dispersant in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the polymer dispersant and the organic phosphonate retarder are compatible for use, and the polymer dispersant has good adaptability with concrete admixture and good slump retaining performance; in actual use, the early strength and the later strength of the cement are improved by 3-5 MPa, the adaptability of the cement to naphthalene series, aliphatic series and polycarboxylic acid water reducing agents is good, and the fluidity of the cement paste is not lost within 2 hours; the polymer dispersant can also reduce the surface energy of particles, improve the affinity with a dispersion medium, effectively inhibit the agglomeration phenomenon among the particles, release interstitial water among the particles, further reduce the water consumption of the standard consistency of cement and improve the performance of the cement; the fluidity of the particles is improved, the surface property of the cement paste is improved, so that the dispersion performance of the cement paste is improved, the thickness of a hydrated layer on the surface of the particles is increased, and the paste is soft and has better fluidity. When the cement paste is compounded with the organic phosphonate retarder, an ideal synergistic effect is shown, so that the slump retaining performance of the cement paste is obviously improved.
Based on the weight parts of the diethanol monoisopropanolamine, the chlorine-free enhanced slump-retaining cement grinding aid provided by the invention comprises 2-4 parts of molasses, preferably 2-3 parts. The source of the molasses is not particularly limited in the present invention, and the molasses commonly used by those skilled in the art can be used. In the invention, the molasses is a viscous, black brown and semi-flowing byproduct in the sugar industry, and the polyhydroxy component in the molasses increases the lubricating effect of a hydration membrane, can reduce the surface energy of powder particles, can improve the flow rate of materials in the material grinding process, reduces the agglomeration of fine particles and plays a role in enhancing grinding aid; when cement particles contact with water, hydrophilic membranes with the same charges are formed, so that the cement particles are mutually repelled and the cement hydration is hindered, further the cement setting time is prolonged, and the slump retaining performance of the cement is improved.
Based on the weight parts of the diethanol monoisopropanolamine, the chlorine-free enhanced slump loss resistant cement grinding aid provided by the invention comprises the balance of water in parts by weight. The type of water is not particularly limited in the present invention, and those skilled in the art may select the water according to the need, such as tap water.
In the invention, the mass ratio of the organic phosphonate retarder to the polymer dispersant is preferably (1-2): 1, more preferably 1: 1.
The invention also provides a preparation method of the chlorine-free reinforced cement grinding aid in the technical scheme, which comprises the following steps:
1) weighing the following raw materials: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer dispersant, molasses and the balance of water;
2) adding the water obtained in the step 1) into a stirring tank, stirring, slowly adding sodium formate to completely dissolve the sodium formate, and continuously stirring to obtain a sodium formate solution;
3) adding diethanol monoisopropanolamine, triethanolamine, an organic phosphonate retarder and a polymer dispersant into the sodium formate solution obtained in the step 2) in sequence, and stirring to obtain a mixed solution;
4) and (3) adding molasses into the mixed solution obtained in the step 3), and stirring to obtain the cement grinding aid.
Preferably, the stirring time of the step 3) is 2 min.
Preferably, the stirring time of the step 4) is 5 min.
The chlorine-free reinforced cement grinding aid and the preparation method thereof provided by the invention are described in detail below with reference to examples, but the invention is not to be construed as being limited by the scope of the invention.
Example 1
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of hydroxy ethylidene diphosphonic acid disodium, 1 part of polyepoxysuccinic acid, 2 parts of molasses and 68 parts of water; .
Example 2
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of potassium hydroxyethylidene diphosphonate, 1 part of sodium polyepoxysuccinate, 2 parts of molasses and 68 parts of water.
Example 3
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of ethylene diamine tetramethylene phosphonic acid sodium, 1 part of sodium polyacrylate, 2 parts of molasses and 68 parts of water.
Example 4
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 0.5 part of hydroxy ethylidene diphosphonate disodium, 0.5 part of polyepoxy sodium succinate, 2 parts of molasses and 69 parts of water.
Example 5
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1.5 parts of hydroxy ethylidene diphosphonate disodium, 1.5 parts of sodium polyacrylate, 2 parts of molasses and 67 parts of water.
Example 6
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 2 parts of hydroxy ethylidene diphosphonic acid potassium, 2 parts of polyepoxysuccinic acid, 2 parts of molasses and 66 parts of water.
Example 7
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of potassium hydroxyethylidene diphosphonate, 1 part of sodium polyacrylate, 2 parts of molasses and 68 parts of water.
Example 8
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of ethylene diamine tetramethylene phosphonic acid sodium, 1 part of polyepoxysuccinic acid, 2 parts of molasses and 68 parts of water.
Example 9
Preparing a cement grinding aid, which comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of ethylene diamine tetramethylene phosphonic acid sodium, 1 part of polyepoxysuccinic acid sodium, 2 parts of molasses and 68 parts of water.
Comparative example 1
Preparing a cement grinding aid, wherein the cement grinding aid comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 2 parts of molasses and 70 parts of water.
Comparative example 2
Preparing a cement grinding aid, wherein the cement grinding aid comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of hydroxy ethylidene diphosphonic acid disodium, 2 parts of molasses and 69 parts of water.
Comparative example 3
Preparing a cement grinding aid, wherein the cement grinding aid comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of polyepoxysuccinic acid, 2 parts of molasses and 69 parts of water.
Comparative example 4
Preparing a cement grinding aid, wherein the cement grinding aid comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of sodium gluconate, 1 part of polyepoxysuccinic acid, 2 parts of molasses and 68 parts of water.
Comparative example 5
Preparing a cement grinding aid, wherein the cement grinding aid comprises the following raw materials in parts by weight: 5 parts of diethanol monoisopropanolamine, 8 parts of triethanolamine, 15 parts of sodium formate, 1 part of sodium tripolyphosphate, 1 part of polyepoxysuccinic acid, 2 parts of molasses and 68 parts of water.
Comparative example 6
Commercial cement grinding aid with excellent performance
Taking all raw materials for producing PO.42.5 cement in the same batch, and carrying out a small grinding test according to an actual production ratio, wherein the grinding aids of the prepared examples, comparative examples and commercial cement grinding aids are added according to the weight percentage of 0.1%, and the grinding aid effect of the prepared cement sample is determined according to the national standard GB/T26748-2011 cement grinding aid; the cement samples prepared above and three water reducing agents, namely a polycarboxylic acid water reducing agent, an aliphatic water reducing agent and a naphthalene water reducing agent, which are most commonly used in the market are taken to carry out adaptability tests of cement and the water reducing agents, wherein the addition amount of the water reducing agents is 2.0%, the initial fluidity and the 2-hour fluidity are respectively measured according to the method of GBT8077-2000 'concrete admixture homogeneity experimental method', and the results are shown in Table 1.
Table 1 shows the results of strength and fluidity of the cement grinding aids prepared in the blank samples, examples 1 to 9 and comparative examples 1 to 6
From the results in table 1: the increase of the compressive strength of cement samples in examples 1-9 in comparison with blank and comparative examples is obvious, which shows that the grinding aid prepared in examples 1-9 has obvious grinding aid effect and obviously improves the early strength and the later strength of the cement; compared with the blank water reducing agents and the comparative examples, the initial fluidity of the grinding aid is obviously increased, and the grinding aid is basically not lost or even slightly increased after 2 hours, so that the slump retaining performance of the cement is obviously improved by the grinding aid prepared in the examples 1-9, and the adaptability of the grinding aid to the water reducing agents is good.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The chlorine-free enhanced slump retaining cement grinding aid is characterized by comprising the following components in parts by weight:
5 parts of diethanolisopropanolamine
Triethanolamine 8 parts
15 parts of sodium formate
Organic phosphonate retarder 1 part
1 part of polymer dispersant
Molasses 2 parts
68 parts of water, namely, water,
the polymer dispersant comprises one or more of polyepoxysuccinic acid, sodium polyepoxysuccinate and sodium polyacrylate.
2. The chlorine-free enhanced slump retaining cement grinding aid of claim 1, wherein the organic phosphonate retarder comprises one or more of disodium hydroxyethylidene diphosphonate, potassium hydroxyethylidene diphosphonate and sodium ethylene diamine tetra methylene phosphonate.
3. The preparation method of the chlorine-free reinforced slump retaining cement grinding aid as claimed in claim 1 or 2, which is characterized by comprising the following steps:
1) weighing the following raw materials: diethanol monoisopropanolamine, triethanolamine, sodium formate, organic phosphonate retarder, polymer dispersant, molasses and water;
2) adding the water obtained in the step 1) into a stirring tank, stirring, slowly adding sodium formate to completely dissolve the sodium formate, and continuously stirring to obtain a sodium formate solution;
3) adding diethanol monoisopropanolamine, triethanolamine, an organic phosphonate retarder and a polymer dispersant into the sodium formate solution obtained in the step 2) in sequence, and stirring to obtain a mixed solution;
4) and (3) adding molasses into the mixed solution obtained in the step 3), and stirring to obtain the cement grinding aid.
4. The method according to claim 3, wherein the stirring time in step 3) is 2 min.
5. The method according to claim 3, wherein the stirring time of step 4) is 5 min.
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| CN110563377B (en) * | 2019-09-29 | 2021-11-02 | 中建商品混凝土有限公司 | Compound type wet-grinding concrete waste residue functional additive and application thereof |
| CN111018395B (en) * | 2019-11-19 | 2021-08-03 | 山东化友水处理技术有限公司 | Corrosion-inhibition slow-setting synergistic cement water reducer and preparation method thereof |
| CN111689715A (en) * | 2020-05-26 | 2020-09-22 | 贵州石博士科技有限公司 | Yield-increasing reinforced cement grinding aid and preparation method thereof |
| CN112047658A (en) * | 2020-09-14 | 2020-12-08 | 株洲宏信科技发展有限公司 | Cement grinding aid, preparation method thereof and application thereof in interior decoration cement |
| CN112919844A (en) * | 2021-02-09 | 2021-06-08 | 华润水泥技术研发（广西）有限公司 | Grinding aid for improving adaptability of high-alumina clinker cement admixture |
| CN113185175A (en) * | 2021-05-12 | 2021-07-30 | 北京金隅水泥节能科技有限公司 | Early strength cement grinding aid and preparation method thereof |
| CN114804700A (en) * | 2021-06-25 | 2022-07-29 | 广西安格尔建材科技有限公司 | Grinding aid special for high-strength P. I, P.II cement and preparation method thereof |
| CN114804704B (en) * | 2022-03-24 | 2023-11-17 | 雷耐(长兴)新材料有限公司 | Environment-friendly chlorine-free cement grinding aid and production method thereof |
| CN115557765B (en) * | 2022-09-19 | 2023-09-12 | 江苏中建商品混凝土有限公司 | Limestone powder composite admixture and preparation method and application thereof |
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| CN103449749A (en) * | 2013-08-23 | 2013-12-18 | 石家庄市长安育才建材有限公司 | High-temperature-resistant super retarder with favorable dispersibility and preparation method thereof |
| CN106082761A (en) * | 2016-06-24 | 2016-11-09 | 桂林华越环保科技有限公司 | A kind of retardation setting type cement grinding aid |
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