CN103524069B - Concrete pumping agent and preparation method and application thereof - Google Patents
Concrete pumping agent and preparation method and application thereof Download PDFInfo
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- CN103524069B CN103524069B CN201310445144.3A CN201310445144A CN103524069B CN 103524069 B CN103524069 B CN 103524069B CN 201310445144 A CN201310445144 A CN 201310445144A CN 103524069 B CN103524069 B CN 103524069B
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- 239000004567 concrete Substances 0.000 title claims abstract description 152
- 238000005086 pumping Methods 0.000 title abstract description 30
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 130
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 45
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000013530 defoamer Substances 0.000 claims description 35
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- 229920005646 polycarboxylate Polymers 0.000 claims description 11
- -1 retardant Substances 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 6
- 150000008130 triterpenoid saponins Chemical group 0.000 claims description 5
- 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 claims description 4
- 229930006000 Sucrose Natural products 0.000 claims description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 239000001509 sodium citrate Substances 0.000 claims description 4
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 4
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 4
- 229940038773 trisodium citrate Drugs 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 150000003077 polyols Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000004566 building material Substances 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 230000001413 cellular effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 7
- 238000005204 segregation Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 5
- 239000012452 mother liquor Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 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 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- 241000197194 Bulla Species 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building materials, in particular to a concrete pumping agent and a preparation method and application thereof. The concrete pumping agent disclosed by the invention comprises the following components in parts by weight: 15-35 parts of polycarboxylic water reducer, 0.1-0.6 part of defoaming agent, 1-3 parts of rheological agent, 1-5 parts of retarder, 0.03-0.2 part of air entraining agent and 56.2-82.87 parts of water, wherein the solid content of the polycarboxylic water reducer is 40%. The pumping agent can effectively solve the problems of rough surface and more pores and cellular pitted surfaces of the concrete prepared by the common pumping agent after demoulding, and has good effect on the formation of the effects of clear water and mirror surfaces on the surface of the fair-faced concrete.
Description
Technical field
The present invention relates to building material field, be specifically related to a kind of concrete pump-feed agent and preparation method thereof and application.
Background technology
Clear-water concrete, also known as decorative concrete, is build surface so that concrete is former or using the transparency protected dose of concrete surface doing protectiveness process as outer surface of building, gains the name because it has decorative effect.Clear-water concrete one-time-concreting is shaping, and any decorations are not done on surface, directly adopts Concrete in Natural look to be facing.Therefore, clear-water concrete requires its mixture uniform color, has good workability (mobility, cohesiveness and water-retentivity), must not occur segregation and bleeding.In pumping construction, not only require that there is good flowing property, also require good cohesiveness, fresh concrete so just can be made to be easy to form and laminated segregation phenomenon does not occur, and cement slurry is as concrete gelling material, its rheological property will directly affect concrete serviceability.The preparation of clear-water concrete proposes very harsh requirement to starting material, not only needs the cement of high-quality, flyash, Aggregate, also needs the concrete pump-feed agent that performance is very superior.
The advantage that polycarboxylate water-reducer has that volume is low, water-reducing rate is high, slump retaining is good and other cement water reducing agents such as concrete work performance is excellent are incomparable, but common polycarboxylate water-reducer is due to the restriction of its synthesis technique level, when being directly used in concrete, concrete 's air-containing is high, intensity is lower, be difficult to meet the smooth surface of clear-water concrete, uniform color, without the particular requirement such as honeycomb, pitted skin.Therefore studying the polycarboxylate water-reducer being applicable to clear-water concrete makes clear-water concrete minimizing bubble, structure closely knit, and ensures that concrete intensity and serviceability have very important realistic meaning.
Adopt the compounded technology of defoamer, air entrapment agent and polycarboxylate water-reducer, the rough atmosphere can eliminated in concrete steeps with the surface imperfection reducing clear-water concrete, introduces uniform small bubbles to ensure the serviceability that concrete is good simultaneously.The outstanding problem that compounded technology faces selects suitable defoamer, air entrapment agent, also accurately will determine defoamer and air entrapment agent volume problem separately simultaneously.The defoamer concrete 's air-containing that easily causes as excessive in volume is too low, and mobility is bad is difficult to construction, but volume is little, and concrete 's air-containing is high causes the phenomenons such as concrete surface bulla is many, pitted skin.Air entrapment agent easily causes degree of compactness reduction, strength degradation too much as mixed, but the little meeting of volume causes construction inconvenience, and the concrete viscosity bubble crossed in ambassador's concrete is difficult to discharge.
Patent of invention CN102101762A discloses a kind of exposed concrete pumping agent and preparation method thereof, its pumping agent is made up of the raw material of following weight percent: sulfamate high-effective water-reducing agent 30%-50%, defoamer 0.1%-0.5%, and retardant 1.0%-3.0%, water-holding agent 0.02%-0.08%, surplus are water.This exposed concrete pumping agent can improve the workability of clear-water concrete to a certain extent, make concrete surface more flat smooth, clear water effect is outstanding, but the faced concrete surface adopting this pumping agent to prepare still has a small amount of cavity, surface finish also needs further to be improved, and its clear water effect can not meet the requirement of people to clear-water concrete.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of concrete pump-feed agent of clear water better effects if.
Concrete pump-feed agent of the present invention, be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.1-0.6 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.03-0.2 part, water 56.2-82.87 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
Preferably, be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.15-0.5 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.05-0.1 part, water 56.4-82.78 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
More preferably be made up of the component of following weight part: poly carboxylic acid series water reducer 33 parts, defoamer 0.25 part, rheological agent 3 parts, retardant 4 parts, air entrapment agent 0.05 part, 59.7 parts, water; Or be made up of the component of following weight part: poly carboxylic acid series water reducer 20 parts, defoamer 0.2 part, rheological agent 1.5 parts, retardant 3 parts, air entrapment agent 0.1 part, 75.2 parts, water, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
Pumping agent of the present invention is made up of high performance water reducing agent of polyocarboxy acid, defoamer, rheological agent, retardant, air entrapment agent and water.
The Main Function of high-performance water reducing agent mixes water reducer greatly to improve dispersion effect between gelling material particles, when keeping mixture water cement ratio constant, can improve its serviceability; In the situation keeping concrete workability constant, reduce concrete folk prescription water consumption, improve concrete strength.
Defoamer can eliminate the unfavorable air pocket that polycarboxylate water-reducer causes, and can also eliminate the bad bubble of other composition bleeds in concrete.Defoamer of the present invention is defoamer kind known by the engineering technical personnel of this area, comprises silicon defoamer, polyethers defoamer, polysiloxane defoamers, higher alcohols etc.Preferred defoamer is dimethyl silicone oil (also claiming polydimethylsiloxane) or silicone emulsion.
Rheological agent can increase the bridge joint effect between gelling material and aggregate, makes cement mortar slurry have suitable thixotropic property, thus drives aggregate to flow together when slurry flows, and the parcel performance of Concrete Structure, avoids concrete disintegration.Use the concrete of rheological agent to have lower yielding stress, namely when reaching desired plasticity viscosity, concrete has better mobility.This effectively fills up template to concrete mix, forms smooth surface and has vital role.Test proves itself and polycarboxylic acids water reducing agent compositional result of use the best.Rheological agent of the present invention is a kind of programmable synthesized polymer material.Commercially available conventional rheological agent is all applicable to the present invention.Rheological agent is preferably high molecular weight polyols, is more preferably the agent of LiqSand concrete rheological, the agent of SY-800 concrete rheological.
Retardant can delay the hydration rate of cement, extends concrete final setting time, enables fresh concrete keep good serviceability in the longer time.Retardant of the present invention is this area engineering technical personnel one or more inorganic or organic retardant known, is preferably at least one in Sunmorl N 60S, Trisodium Citrate, Sodium hexametaphosphate 99, white sugar.
Air entrapment agent can make concrete mix introducing air and form even, stable diameter at the micro-bubble of 20 ~ 300 μm when stirring.Mixing of it makes concrete self be provided with good easy to be close property and exhaust capacity, enables again the ability of concrete anti-segregation bleeding significantly promote.Formation for faced concrete surface clear water, mirror effect has extraordinary effect.Preferably, air entrapment agent of the present invention is triterpenoid saponin or AOS air entrapment agent, and wherein AOS air entrapment agent refers to alpha-olefin sodium sulfonate.
The present invention also provides the preparation method of concrete pump-feed agent of the present invention, comprises the steps: that (1) accurately takes various component by weight; (2) by polycarboxylate water-reducer, water, defoamer mix and blend 30-40min; (3) add rheological agent, retardant, air entrapment agent stirring 15-30min, to obtain final product.
The present invention also provides the application of concrete pump-feed agent of the present invention in clear-water concrete.Exposed concrete pumping agent of the present invention is light brown liquid, and density is at 1.08g-1.30g/cm
3, pH is at 6.5-7.0, and its volume in concrete is the 0.7-2.6wt% of gel material content in concrete, and accurate volume, based on ensureing concrete flowing property, function of slump protection and ensureing the clear water effect of concrete surface, is determined according to test.
Each component in concrete pump-feed agent of the present invention has well played synergy.High performance water reducing agent of polyocarboxy acid, ensure that the high water-reducing property of pumping agent, Compounded Antifoamer eliminates the bad bubble that other compositions in polycarboxylate water-reducer and concrete cause, adding of rheological agent adds concrete parcel performance, segregation is avoided while guarantee concrete good flow performance, bleeding, adding of retardant effectively delays hydrated cementitious, ensure that concrete has the workability of long period, high-quality air entrapment agent makes concrete self be provided with good easy to be close property and exhaust capacity, the ability of concrete anti-segregation bleeding is enable again significantly to promote.In a word, concrete demoulding rear surface prepared by common pumping agent is coarse to use concrete pump-feed agent of the present invention effectively to improve, and the problem that pore, honeycomb and scale are many, the formation for faced concrete surface clear water, mirror effect has extraordinary effect.The concrete construction excellent performance using concrete pump-feed agent of the present invention is proved through lot of experiments, within 1 hour, slump gradual loss is less than 30mm, intensity is guaranteed, concrete water-reducing ratio generally remains on more than 28%, effectively can improve the workability of clear-water concrete, concrete surface flat smooth, clear water effect is outstanding, and the aspect performances such as impervious, endurance quality are excellent.
Accompanying drawing explanation
Fig. 1 is the photo after utilizing concrete form removal that described in the embodiment of the present invention 1 prepared by the special pumping agent of clear-water concrete;
Fig. 2 is according to concrete gel material identical in embodiment 1 and consumption, the photo after the concrete form removal utilizing general pumping agent to prepare.General pumping agent by polycarboxylate water-reducer, retardant, water-holding agent, air entrapment agent is composite forms;
Fig. 3 is according to concrete gel material identical in embodiment 1 and consumption, utilizes the photo after the pumping agent concrete form removal of the open formula preparation of embodiment 1 in documents CN102101762A.
Embodiment
Concrete pump-feed agent of the present invention, be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.1-0.6 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.03-0.2 part, water 56.2-82.87 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
Preferably, be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.15-0.5 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.05-0.1 part, water 56.4-82.78 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
More preferably be made up of the component of following weight part: poly carboxylic acid series water reducer 33 parts, defoamer 0.25 part, rheological agent 3 parts, retardant 4 parts, air entrapment agent 0.05 part, 59.7 parts, water; Or be made up of the component of following weight part: poly carboxylic acid series water reducer 20 parts, defoamer 0.2 part, rheological agent 1.5 parts, retardant 3 parts, air entrapment agent 0.1 part, 75.4 parts, water, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
Pumping agent of the present invention is made up of high performance water reducing agent of polyocarboxy acid, defoamer, rheological agent, retardant, air entrapment agent and water.
The Main Function of high-performance water reducing agent mixes water reducer greatly to improve dispersion effect between gelling material particles, when keeping mixture water cement ratio constant, can improve its serviceability; In the situation keeping concrete workability constant, reduce concrete folk prescription water consumption, improve concrete strength.
Defoamer can eliminate the unfavorable air pocket that polycarboxylate water-reducer causes, and can also eliminate the bad bubble of other composition bleeds in concrete.Defoamer of the present invention is defoamer kind known by the engineering technical personnel of this area, comprises silicon defoamer, polyethers defoamer, polysiloxane defoamers, higher alcohols etc.Preferred defoamer is dimethyl silicone oil (also claiming polydimethylsiloxane) or silicone emulsion.
Rheological agent can increase the bridge joint effect between gelling material and aggregate, makes cement mortar slurry have suitable thixotropic property, thus drives aggregate to flow together when slurry flows, and the parcel performance of Concrete Structure, avoids concrete disintegration.Use the concrete of rheological agent to have lower yielding stress, namely when reaching desired plasticity viscosity, concrete has better mobility.This effectively fills up template to concrete mix, forms smooth surface and has vital role.Test proves itself and polycarboxylic acids water reducing agent compositional result of use the best.Rheological agent of the present invention is a kind of programmable synthesized polymer material.Commercially available conventional rheological agent is all applicable to the present invention.Rheological agent is preferably high molecular weight polyols, is more preferably the agent of LiqSand concrete rheological, the agent of SY-800 concrete rheological.
Retardant can delay the hydration rate of cement, extends concrete final setting time, enables fresh concrete keep good serviceability in the longer time.Retardant of the present invention is this area engineering technical personnel one or more inorganic or organic retardant known, is preferably at least one in Sunmorl N 60S, Trisodium Citrate, Sodium hexametaphosphate 99, white sugar.
Air entrapment agent can make concrete mix introducing air and form even, stable diameter at the micro-bubble of 20 ~ 300 μm when stirring.Mixing of it makes concrete self be provided with good easy to be close property and exhaust capacity, enables again the ability of concrete anti-segregation bleeding significantly promote.Formation for faced concrete surface clear water, mirror effect has extraordinary effect.Preferably, air entrapment agent of the present invention is triterpenoid saponin or AOS air entrapment agent, and wherein AOS air entrapment agent refers to alpha-olefin sodium sulfonate.
The preparation method of concrete pump-feed agent of the present invention, comprises the steps: that (1) accurately takes various component by weight; (2) by polycarboxylate water-reducer, water, defoamer mix and blend 30-40min; (3) add rheological agent, retardant, air entrapment agent stirring 15-30min, to obtain final product.
The present invention also provides the application of concrete pump-feed agent of the present invention in clear-water concrete.Exposed concrete pumping agent of the present invention is light brown liquid, and density is at 1.08g-1.30g/cm
3, pH is at 6.5-7.0, and its volume in concrete is the 0.7-2.6wt% of gel material content in concrete, and accurate volume, based on ensureing concrete flowing property, function of slump protection and ensureing the clear water effect of concrete surface, is determined according to test.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Reagent used in embodiment is commercially available, wherein:
Water reducing type poly carboxylic acid mother liquor: manufacturer is Sichuan Jilong Chemical Construction Materials Co., Ltd, product batch number 20130815-0;
LiqSand concrete rheological agent: manufacturer is Chengdu Nan Pei Science and Technology Ltd., product batch number 20130820-1;
SY-800 concrete rheological agent: manufacturer is think deeply territory Chemical Co., Ltd. in Sichuan, product batch number 2013-6-1.
Embodiment 1
Get water reducing type poly carboxylic acid mother liquor (ethers, 40% solid content) 3.3kg, dimethyl silicone oil 0.025kg, after water 5.97kg mixes and stirs 30min, add LiqSand concrete rheological agent 0.3kg successively, Sunmorl N 60S 0.25kg, white sugar 0.15kg, triterpenoid saponin 0.005kg, mix and stir 20min, obtain the special pumping agent of clear-water concrete.Gained pumping agent recommendation volume is the 0.8-1.3wt% of gel material content in concrete.
Detected result: concrete surface flat smooth, except the hole that mould itself causes, surface there is no other cavities.Without honeycomb, pitted skin, rough phenomenon.Detailed results as shown in Figure 1
Embodiment 2
Get water reducing type poly carboxylic acid mother liquor (ethers, 40% solid content) 2.0kg, silicone emulsion 0.02kg, water 7.52kg to mix and stir after 35min, add SY-800 concrete rheological agent 0.15kg successively, Sunmorl N 60S 0.15kg, Trisodium Citrate 0.15kg,
AOS air entrapment agent 0.01kg, mixes and stirs 25min, obtain the special pumping agent of clear-water concrete.Gained pumping agent recommendation volume is the 1.5-2.2wt% of gel material content in concrete.
Embodiment 3
Get water reducing type poly carboxylic acid mother liquor (ethers, 40% solid content) 1.5kg, silicone emulsion 0.015kg, after water 8.278kg mixes and stirs 40min, add LiqSand concrete rheological agent 0.1kg successively, Sunmorl N 60S 0.1kg, AOS air entrapment agent 0.007kg, mixes and stirs 15min, obtain the special pumping agent of clear-water concrete.Gained pumping agent recommendation volume is the 2.2-2.6wt%. of gel material content in concrete.
Embodiment 4
Get water reducing type poly carboxylic acid mother liquor (ethers, 40% solid content) 3.5kg, silicone emulsion 0.05kg, after water 5.64kg mixes and stirs 38min, add LiqSand concrete rheological agent 0.3kg successively, Sodium hexametaphosphate 99 0.5kg, triterpenoid saponin 0.01kg, mix and stir 30min, obtain the special pumping agent of clear-water concrete.Gained pumping agent recommendation volume is the 0.7-1.1wt% of gel material content in concrete.
Comparative example 1
Adopt the open formula of embodiment 1 in documents CN102101762A to prepare exposed concrete pumping agent, prepare clear-water concrete with concrete gelatinous material identical in the embodiment of the present invention 1 and consumption.Detected result finds that this concrete surface has a little aperture, and there is rough phenomenon in surface portion region.Detailed results as shown in Figure 3.
The concrete workability applying gained concrete pump-feed agent of the present invention is good, and within 1 hour, slump gradual loss is less than 30mm; Contrast normal concrete and the concrete of documents, add the concrete of pumping agent of the present invention, all has lifting in various degree in the intensity of each solidifying phase; Concrete after sclerosis at outward appearance flat smooth, clear water successful, and the aspect performances such as impervious, endurance quality are excellent.
Claims (9)
1. concrete pump-feed agent, it is characterized in that: be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.1-0.6 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.03-0.2 part, water 56.2-82.87 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%, wherein, described rheological agent is high molecular weight polyols.
2. concrete pump-feed agent according to claim 1, it is characterized in that: be made up of the component of following weight part: poly carboxylic acid series water reducer 15-35 part, defoamer 0.15-0.5 part, rheological agent 1-3 part, retardant 1-5 part, air entrapment agent 0.05-0.1 part, water 56.4-82.78 part, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
3. concrete pump-feed agent according to claim 1, is characterized in that: be made up of the component of following weight part: poly carboxylic acid series water reducer 33 parts, defoamer 0.25 part, rheological agent 3 parts, retardant 4 parts, air entrapment agent 0.05 part, 59.7 parts, water; Or be made up of the component of following weight part: poly carboxylic acid series water reducer 20 parts, defoamer 0.2 part, rheological agent 1.5 parts, retardant 3 parts, air entrapment agent 0.1 part, 75.2 parts, water, wherein, the solid content of poly carboxylic acid series water reducer is in 40%.
4. the concrete pump-feed agent according to any one of claim 1-3, is characterized in that: described defoamer is dimethyl silicone oil or silicone emulsion.
5. the concrete pump-feed agent according to any one of claim 1-3, is characterized in that: described retardant is at least one in Sunmorl N 60S, Trisodium Citrate, Sodium hexametaphosphate 99, white sugar.
6. the concrete pump-feed agent according to any one of claim 1-3, is characterized in that: described air entrapment agent is triterpenoid saponin or AOS air entrapment agent.
7. prepare the method for the concrete pump-feed agent described in any one of claim 1-6, it is characterized in that comprising the steps: that (1) accurately takes various component by weight; (2) by polycarboxylate water-reducer, water, defoamer mix and blend 30-40min; (3) add rheological agent, retardant, air entrapment agent stirring 15-30min, to obtain final product.
8. the application of the concrete pump-feed agent described in any one of claim 1-6 in clear-water concrete.
9. the application of concrete pump-feed agent according to claim 8 in clear-water concrete, is characterized in that: the volume of described concrete pump-feed agent is the 0.7-2.6wt% of gel material content in concrete.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107540265A (en) * | 2017-10-23 | 2018-01-05 | 东阿东昌天汇科技有限公司 | Cement water reducing agent and preparation method thereof |
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