CN85103186A - Method for producing concrete molded product - Google Patents
Method for producing concrete molded product Download PDFInfo
- Publication number
- CN85103186A CN85103186A CN85103186.2A CN85103186A CN85103186A CN 85103186 A CN85103186 A CN 85103186A CN 85103186 A CN85103186 A CN 85103186A CN 85103186 A CN85103186 A CN 85103186A
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- CN
- China
- Prior art keywords
- cement
- weight
- frit
- calcium
- concrete
- Prior art date
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- 239000004567 concrete Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000011575 calcium Substances 0.000 claims abstract description 51
- 239000004568 cement Substances 0.000 claims abstract description 39
- 239000011398 Portland cement Substances 0.000 claims abstract description 32
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 30
- 239000010440 gypsum Substances 0.000 claims abstract description 14
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 11
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 7
- 150000004683 dihydrates Chemical class 0.000 claims abstract 2
- 238000012423 maintenance Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 9
- 239000004571 lime Substances 0.000 claims description 9
- 239000002075 main ingredient Substances 0.000 claims description 8
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- 239000003365 glass fiber Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 4
- -1 intermixture Substances 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract 3
- 150000001345 alkine derivatives Chemical class 0.000 abstract 2
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 229910052918 calcium silicate Inorganic materials 0.000 abstract 1
- 239000000378 calcium silicate Substances 0.000 abstract 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 abstract 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000006703 hydration reaction Methods 0.000 description 13
- 239000000920 calcium hydroxide Substances 0.000 description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 239000012634 fragment Substances 0.000 description 9
- 230000036571 hydration Effects 0.000 description 9
- 239000011449 brick Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011211 glass fiber reinforced concrete Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 208000034189 Sclerosis Diseases 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- CEYULKASIQJZGP-UHFFFAOYSA-L disodium;2-(carboxymethyl)-2-hydroxybutanedioate Chemical compound [Na+].[Na+].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O CEYULKASIQJZGP-UHFFFAOYSA-L 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000227425 Pieris rapae crucivora Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The concrete molding of the present invention is produced by adding a known additive to cement to prepare a concrete molding, and then maintaining the concrete molding at a temperature of 15 to 65 ℃ for 4 hours or more. The cement comprises the following components: 20 to 70% by weight of Portland cement fused alkyne mainly composed of calcium silicate, 10 to 40% by weight of fused alkyne mainly composed of calcium sulfoaluminate, 10 to 40% by weight of anhydrous gypsum or dihydrate gypsum, and 20 to 60% by weight of blast furnace water slag or fly ash, and (3Al2O3+1.5SiO2)/(CaO-SO2) The molar ratio is 1.0-1.5.
Description
The invention relates to and adopt the Portland cement frit and with calcium sulphoaluminate (3CaO3Al
2O
3CaSO
4) blended cement made for the frit of Main Ingredients and Appearance, gypsum, blast furnace granulated slag, add with usual way an amount of gather materials, intermixture, water, set retarder, glass fibre etc. make the concrete mould goods, the manufacture method of concrete mould goods of maintenance more than 4 hours in 15 ℃～65 ℃ scopes of temperature then its objective is that to provide glass fibre can not lose food for a long time rotten and do not lower the GRC of bending, impact strength, do not produce weathering and the fragment of brick of paving usefulness attractive in appearance and do not allow to be subject to acid and concrete mould goods such as tile fragment that sulfate is corroded.
Make the concrete mould goods with silicic acid 3 lime (3CaOSiO commonly used
2), silicic acid 2 lime (2CaOSiO
2) to wait silicate calcium be after the Portland cement of Main Ingredients and Appearance and water mix, in the setting and harden process, except the silicate calcium water and thing (C-S-H) of main product, mainly also to generate calcium hydroxide (Ca(OH)
2).
Silicic acid 3 lime (3CaOSiO that containing weight 50% for example
2) and 20% silicic acid 2 lime (2CaOSiO
2) normal portland cement in, calculate the cement of former 100 parts of weight from stoechiometry, just can generate the calcium hydroxide (Ca(OH) of 30 parts of weight
2).
So just make common cement and the concrete pH that has solidified bring up to 12.8～13.2 degree, become cement and concrete and keep alkaline reason.
Therefore, the glass fiber-reinforced concrete of making by alkaline-resisting glass fibre and Portland cement of composite GRC() because the calcium hydroxide (Ca(OH) that generated by cement
2) influence of highly basic, glass fibre is corroded, cause GRC to stretch and reduced bending strength performance and impact resistance.
Also have, with the coloured cement goods and the color concrete product of pigment coloring, owing to the Ca(OH that generates by cement)
2From the space of hardening of cement body and inside concrete, move and separate out the surface, perhaps at surface and airborne CO
2Reaction becomes CaCO
3The cause of separating out, it is a lot of consequently producing so-called weathering and damage situation attractive in appearance.
In addition, the Ca(OH that from cement, generates)
2With reactions such as sulfate in various acid, seawater and the thermal water hardening of cement body and concrete are suffered erosion and cause the expansion of sulfate.
Because Ca(OH)
2Product be the essential phenomenon of Portland cement hydration reaction, so will prevent the calcium hydroxide (Ca(OH) of cement
2) generation be unusual difficulty to reduce the highly basic degree.Always also seemingly repaid for example to adopt and contained easily and Ca(OH) with interpolation
2Reactive activity silica and activated alumina material are as silicate hydrate of calcium (CaO-SiO
2-H
2O is) and calcium aluminate hydrate (CaO-Al
2O
3-H
2O system) is fixed as methods such as insoluble hydrate and it, but also fails to prevent effectively Ca(OH)
2Generation.
The invention of present patent application is to adopt not generate Ca(OH)
2Special cement so that when making the concrete of so-called glass fiber-reinforced concrete, color concrete and acidproof and sea water intrusion, can eliminate the phenomenon of recurrent expansion crack.
Below at first set forth this special cement and do not generate Ca(OH)
2And present reason with the equal rerum natura of Portland cement.
Be shown below calcium sulphoaluminate 3CaO3Al
2O
2CaSO
4When hydration and the reaction of calcium hydroxide, gypsum form entringite 3CaO3Al
2O
3CaSO
4(calcium sulphoaluminate)+8CaSO
4(gypsum)+6Ca(OH)
2(calcium hydroxide)+90H
2O → 3(3CaOAl
2O
33CaSO
432H
2O) (entringite), anhydrous gypsum and calcium hydroxide can be consumed naturally in this reaction, and calcium hydroxide (Ca(OH)
2) be to supply with by the calcium hydroxide that hydration reaction produced of Portland cement frit.
In order not generate calcium hydroxide (Ca(OH)
2), the most important thing is to allow calcium sulphoaluminate the calcium hydroxide (Ca(OH) that produces by the Portland cement frit
2) all consume, make internal system not have calcium hydroxide (Ca(OH)
2).This reaction is represented by following formula.Here, the calcium sulphoaluminate frit is exactly the material that contains as the main compound calcium sulphoaluminate.
In a word, as long as the silicic acid 3 lime (3CaOSiO in the Portland cement frit
2) and silicic acid 2 lime (2CaOSiO
2) calcium hydroxide (Ca(OH) that generates after the hydration
2) and calcium sulphoaluminate (3CaO3Al
2O
2CaSO
4), gypsum (CaSO
4) reaction generate entringite composition just.
Therefore, be exactly by as Ca(OH as the representational material of the special cement that the present invention introduced)
2The Portland cement frit of supply source, be that calcium sulphoaluminate frit, anhydrous gypsum and the blast furnace granulated slag of Main Ingredients and Appearance constitutes with the calcium sulphoaluminate.
The Portland cement frit uses in order to ensure the durability after generating, harden at C-S-H, and its use level accounts for more than 20% of weight, but for fear of producing too much Ca(OH)
2, general at below 70% of weight.The Portland cement frit that can adopt has the normal portland cement frit, in hot Portland cement clinker, the quick hardening Portland cement frit, express hard Portland cement frit, white Portland cement frit, in addition the Portland cement of anti-sulfate frit or the like, can also adopt the Portland cement and the Portland cement that add gypsum in the Portland cement frit to add that the blended cement of cigarette ash, silica, blast furnace granulated slag etc. replaces the Portland cement frit.
The calcium sulphoaluminate frit is the 3CaO3Al that contains of order father cement limited company production
2O
3CaSO
4About 70% frit, the use level of calcium sulphoaluminate frit and anhydrous gypsum is not residual Ca(OH in order to make its reaction)
2, its weight is respectively more than 10%, but reduces durability in order to prevent a large amount of generation of entringite, and its weight all is decided to be below 40% respectively.
In addition except calcium sulphoaluminate, CaOAl
2O
2, 12CaO7Al
2O
3Deng calcium aluminate too can with Ca(OH)
2, gypsum reaction forms entringite, but 3CaOAl
2O
3Even be calcium aluminate equally, Ca(OH also gets along well)
2So reaction resembles 3CaOAl
2O
3Such CaO/Al
2O
3Mole ratio is out of use greater than 3 calcium aluminate.
Therefore, can use and contain CaOAl
2O
312CaO7Al
2O
3Alumina cement replace the calcium sulphoaluminate frit.
Then can use 2 water gypsum CaSO as gypsum
42H
2O replaces anhydrous gypsum CaSO
4
The Main Ingredients and Appearance of blast furnace granulated slag has CaO, SiO
2, Al
2O
2, with intrasystem calcium hydroxide (Ca(OH)
2) and gypsum CaSO
4Generate C-S-H and entringite etc. after the reaction, can play equally with the calcium sulphoaluminate frit and capture calcium hydroxide (Ca(OH)
2) effect.
For the effect that makes blast furnace granulated slag is brought into play, its cooperation weight must be more than 20%, still because the amount of blast furnace granulated slag too much can cause significantly diminishing of cement early strength, so the use level of blast furnace granulated slag will be at below 60% of weight.Also can adopt with SiO
2, Al
2O
3, CaO etc. is Main Ingredients and Appearance and intrasystem Ca(OH)
2The cigarette ash of reaction replaces blast furnace granulated slag.
The calcium hydroxide that in the hydro-combination process of cement, generates (Ca(OH)
2) finally must be equivalent to CaO2SiO as C-S-H(
23H
2O) and entringite (3CaOAl
2O
33CaSO
432H
2O) be fixed.
Because the CaO/SiO of C-S-H
2Mole ratio=1.5, the CaO/Al of entringite
2O
3Mole ratio be 3, and the part of the lime branch (CaO) of cement forms gypsum (CaSO
4), so at (3Al
2O
3+ 1.5SiO
2)/(CaO-SO
3) gram molecule 〉=1 time, on stoechiometry, just do not have again certainly Swam from calcium hydroxide (Ca(OH)
2) be present in the system.
On the other hand, when mole ratio surpassed 1.5, the original function of cement itself will disappear, and made sclerosis and intensity variation.Thereby (3Al
2O
3+ 1.5SiO
2)/(CaO-SO
3) mole ratio requires to reach below 1.5 1.0 or more.
Above-mentioned special cement have in hardenite, do not contain Ca(OH)
2Make very much the interested characteristic of people, therefore, if use glass fiber-reinforced concrete GRC, long-term between in, glass fibre is not vulnerable to alkaline attack yet, so can prevent the reduction of intensity and crash values.And if the use color concrete can prevent because Ca(OH)
2And CaCO
3And the weathering that produces; Can also improve the erosion resisting of concrete to various acid, seawater.
But this special cement has a very big shortcoming as concrete the time making.Here it is because Portland cement frit or be that the frit of Main Ingredients and Appearance all has hydraulicity with the calcium sulphoaluminate frit, so both hydration one disequilibriums just can not expect to have good hardening effect.Low temperature just below 15 ℃, in the time of particularly below 10 ℃, only can be subjected to delaying to a certain degree, the hydration of the calcium sulphoaluminate not progress of then can saying so fully for the hydration of Portland cement frit.Become common temperature more than 15 ℃ the time from low temperature when temperature, at the C of Portland cement frit for this reason
3S, C
2S is owing to be in fully the state of sclerosis after the hydration, calcium sulphoaluminate one carries out hydration, will tensile stress take place in the hardenite and causes the hardenite expansion crack.
Several inventors of the present invention study the method that solves this expansion crack, and the result has found to maintain with steam when low temperature, and it is very effective method that its temperature is remained on more than 15 ℃.
Just temperature is remained on more than 15 ℃, when remaining on the maintenance temperature more than 15 ℃ like this, the hydration reaction of the hydration reaction of Portland cement frit and calcium sulphoaluminate frit will be carried out simultaneously, so the expansive force that the calcium sulphoaluminate hydration takes place when generating entringite will be sponged by the quaking concrete that does not also harden fully, just can not produce the phenomenon of concrete expansion crack yet.Also have, by maintain more than 4 hours more than 15 ℃ in temperature, unreacted calcium sulphoaluminate, gypsum have just tailed off, and also just can not occur in the expansive force that causes be full of cracks after the sclerosis again.Also have, the temperature that promotes maintenance is the same with the situation of common concrete product, with below 65 ℃ for well.
Maintenance method of the present invention is not that to resemble the common concrete situation be promoting that intensity manifests, and removes model framework ahead of time and be period purpose.In common concrete product,, just no problem by prolonging service time even in low temperature.Even and concrete of the present invention prolongs the tendency that service time can not reduce concrete generation be full of cracks at low temperatures.
The common white cement of general employing, the concrete product of normal portland cement system also has the problem of the weathering of not producing by the steam maintenance.And the used special cement of the present invention even use the steam maintenance also to have the feature of the weathering of not producing, so carry out the steam maintenance with special cement of the present invention, just can obtain can not produce the concrete product of weathering.
This special cement has some tendencies of condensing ahead of time, and adopts the hydroxyl carboxylic or its salt that add an amount of natrium citricum, citric acid etc. just can prolong cement setting time.
Promote the preceding standing time of maintenance, the speed of intensification and cooling is identical with the situation of common concrete product.
Embodiment 1
Common Portland cement frit weight 25%, the calcium sulphoaluminate frit weight 15% that order father's cement limited company produces, anhydrous gypsum weight 15%, blast furnace granulated slag weight 45% just can obtain cement used in the present invention after mixing pulverizing.(the 3Al of this cement
2O
2+ 1.5SiO
2)/(CaO-SO
2) mole ratio=1.31.
In cement of the present invention, add quartz sand, flower Wang Qiangli water reducer, after the glass fibre for natrium citricum, water and the anti-highly basic of guaranteeing curring time, mix to evenly with agitator, the cooperation that just can obtain GRC, GRC is S/C=1.0, W/C=0.40, water reducer C * 1%, natrium citricum C * 0.4%, GFC * 3%.In long 200cm * wide 100cm * dark 1cm framed, be shaped, the surface with trowel push away flat after, heated up 3 hours, kept 30 ℃ * 6 hours, carry out steam and maintain and just can obtain glass fiber-reinforced concrete slab to put cold method naturally again.As what compare with it is the glass fiber-reinforced concrete that maintains gained without the steam maintenance under the greenhouse.
Also have, from being shaped to the daylong room temperature that the steam maintenance finishes, minimum is 1 ℃, and the highest is 17 ℃.
GRC plate separately all is to rest in the room temperature in 3 days after the shaping, just is exposed to outdoor with vertical state after the later demoulding.After exposing 3 months the state of plate is evaluated, the result is as shown in table 1:
Table 1
Manufacture method exposes trimestral observed result naturally
Keep no abnormal state with the steam maintenance
30 ℃ * 6 hours
The be full of cracks of the mesh shape of diameter 2cm～3cm takes place in the plate surface without the steam maintenance,
Pushing away flat surface with the whole plate expansion of room temperature maintenance to trowel circumnutates
The GRC plate without steam maintenance that compares, when being shaped after 3 days, although because the hydration of normal portland cement frit also can be brought into play hardening strength completely, calcium sulphoaluminate is not reaction almost.Therefore, take after the outdoor exposure, because the rising of temperature and rainy, unhydrated calcium sulphoaluminate just produces reaction at leisure, generates entringite and expand to cause GRC plate generation crack performance.
Embodiment 2
Two kinds of cement as shown in table 2 have been used in this enforcement.
A shown in the above-mentioned table 2, B2 kind cement are added with pigment iron oxide red, the citric acid of delaying solidifying, quartz sand, water separately, mix the colored plaster that stirring just can obtain 2 kinds with agitator.The cooperation of colored plaster is that S/C=1.0, W/C=0.34, pigment addition C * 5%, citric acid addition are C * 0.2% in A kind cement, are C * 0.5% in B kind cement.
By vibration pressurization, (on the specification 100mm * 200mm * 40mm), the thickness of these colored mortars with 10mm is formed in the basic unit of the porous concrete that adopts the irregular rubble of normal portland cement 5-10mm.Immediately carry out after the off-type, heated up 3 hours, kept 50 ℃ * 8 hours, carried out in cold 6 hours or 4 hours paving the fragment of brick of usefulness (specification 100 * 200 * 50mm) with regard to obtaining painted water penetration after the steam maintenance to put naturally.By comparison be without steam maintenance, remain in 5 ℃ paving of gained after the shaping always in the same old way and use fragment of brick.Also have, mix the thermostatic chamber that stirs, is shaped all at 5 ℃ and carry out, the fragment of brick after steam maintains is also brought back in 5 ℃ the thermostatic chamber and is left standstill.
Each fragment of brick of paving usefulness takes out from thermostatic chamber after being shaped three days, is immersed in 20 ℃ the water, observes the state of fragment of brick after 10 days, and the result is as shown in table 3.
In the concrete of basic unit, unusual state does not all take place in all fragments of brick.Because № 1 to 3 and № 5 to 7 usefulness steam maintenance 50 ℃ * 4,6 or 8 hours is to adopt the present invention to make, do not chap so in water, soak, and № 4 and № 8 compare with it and be full of cracks of generation are arranged down to peeling off.Be shaped after 3 days and take out sample from fragment of brick separately, the result who measures by the powder X-ray diffraction, in № 1 to 4 and № 5 to 7, calcium sulphoaluminate 3CaO3Al
2O
3CaSO
4Reach gypsum and be not detected basically, in № 4 and 8, then can detect unreacted 3CaO3Al
2O
3CaSO
4, CaSO
4And CaSO
42H
2O.
Claims (1)
- Employing is with silicic acid 3 lime (3CaOSiO 2), silicic acid 2 lime (2CaOSiO 2) the silicate calcium that waits is the weight 20～70% of the Portland cement frit of Main Ingredients and Appearance, with calcium sulphoaluminate 3CaO3Al 2O 3CaSO 4Be frit weight 10～40%, anhydrous gypsum or the dihydrate gypsum weight 10～40% of Main Ingredients and Appearance, blast furnace granulated slag or cigarette ash weight 20～60% are formed and (3Al 2O 3+ 1.5SiO 2)/(CaO-SO 2) mole ratio is at the cement below 1.5 more than 1.0, add with usual way an amount of gather materials, intermixture, water, set retarder, glass fibre etc. make the concrete mould goods, maintenance is more than 4 hours in 15 ℃～65 ℃ scopes of temperature then, and this is the feature of the manufacture method of this concrete mould goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103186 CN1014984B (en) | 1985-04-23 | 1985-04-23 | Method for producing concrete molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103186 CN1014984B (en) | 1985-04-23 | 1985-04-23 | Method for producing concrete molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103186A true CN85103186A (en) | 1986-10-22 |
| CN1014984B CN1014984B (en) | 1991-12-04 |
Family
ID=4793021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103186 Expired CN1014984B (en) | 1985-04-23 | 1985-04-23 | Method for producing concrete molded product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014984B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761165A (en) * | 2015-03-23 | 2015-07-08 | 苏州市德莱尔建材科技有限公司 | Composite portland cement and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101791C (en) * | 1998-12-30 | 2003-02-19 | 滦县筑方特种水泥有限公司 | Ultrastrength cement |
-
1985
- 1985-04-23 CN CN 85103186 patent/CN1014984B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761165A (en) * | 2015-03-23 | 2015-07-08 | 苏州市德莱尔建材科技有限公司 | Composite portland cement and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1014984B (en) | 1991-12-04 |
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