CN1034193A - Concrete dewater agent of pumping over type - Google Patents
Concrete dewater agent of pumping over type Download PDFInfo
- Publication number
- CN1034193A CN1034193A CN 89100147 CN89100147A CN1034193A CN 1034193 A CN1034193 A CN 1034193A CN 89100147 CN89100147 CN 89100147 CN 89100147 A CN89100147 A CN 89100147A CN 1034193 A CN1034193 A CN 1034193A
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- CN
- China
- Prior art keywords
- concrete
- cement
- water
- agent
- aromatic hydrocarbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of pumping water reducer that concrete is used that is suitable for.It is to be composited by calcium lignosulfonate air-entraining water-reducing agent and polynuclear aromatic hydrocarbon sulfonate high-efficient water, and cement is had good adaptability, can obviously improve concrete pumpability.Be specially adapted in the common and pump concrete of ordinary Portland cement, silicate cement, Portland blast, trass cement preparation.More suitable to commerical ready-mixed concrete and large volume casting concrete.To the effect of reinforcing bar non-corroding.Every m
3But concrete takes 1～3 yuan with this recombiner economical with materials.
Description
The present invention relates to a kind of pumping water reducer that concrete is used that is suitable for.
Abroad the method for improving concrete pumpability with chemical admixture generally is successively to mix certain water reducer, pumping agent (U.S.) or flowing agent (Japan) in concrete mix.Domestic general independent employing xylogen calcium sulfonate or high efficiency water reducing agent.But owing to separately can produce rapid hardening to the homemade cement of making adjustable solidification agent with fluorgypsum, and concrete early strength is increased slow down with calcium lignin sulphonate.Therefore, many engineerings can not be used.Though and use high efficiency water reducing agent can solve early strength and cement adaptability separately, cost an arm and a leg (3500 yuan/more than the t), volume big (bigger three times) than calcium lignin sulphonate; And mix in the concrete, its slump-loss is big, and (15min＞4cm) is so the pump concrete engineering can't be used.
The objective of the invention is to provide a kind of pumping water reducer that cement is had (containing the cement that fluorgypsum is made adjustable solidification agent) adaptability.Its moderate cost has certain amount of air entrainment to concrete, makes its workability good, and bleeding quantity is little, and slump-loss is little, can obviously improve concrete pumpability.
Concrete of the present invention pumping water reducer is the mixture of calcium lignosulfonate air-entraining water-reducing agent and polynuclear aromatic hydrocarbon sulfonate high-efficient water.Its weight percent is: calcium lignosulfonate air-entraining water-reducing agent is 30～50, and polynuclear aromatic hydrocarbon sulfonate high-efficient water is 70～50.Because the ratio of calcium lignin sulphonate is too high, can produce rapid hardening to the cement of making adjustable solidification agent with fluorgypsum; Cross lowly, then need to increase the consumption of polycyclic aromatic hydrocarbon sulfonate, make cost higher.Therefore, optimum proportion is 1: 1.In above-mentioned mixture, calcium lignin sulphonate has the effect of bleed, diminishing and slow setting to cement and concrete.Can reduce the slump-loss of pump concrete, the little air of introducing can reduce the friction resistance of pipeline; Polycyclic aromatic hydrocarbon sulfonate has higher diminishing, enhancement to cement and concrete.It is lower to overcome the calcium lignin sulphonate early strength, and the shortcoming that water-reducing effect is not high makes the pump concrete intensity enhancing.
The concrete advantage of mixing pumping water reducer of the present invention can be summarized as follows:
1. compare with the concrete of not mixing admixture (volume be cement weight 3%)
(1) good to cement adaptability.Promptly, mix this agent and can not produce rapid hardening make the cement of adjustable solidification agent with fluorgypsum.
(2) can reduce the concrete water amount more than 10%, obviously improve workability, reduce concrete water bleeding amount 20%.
(3) (20min≤4cm) is better than Japanese flowing agent index (15min≤4min) can to reduce the loss of concrete slump.Can reduce the transfer pressure 5%～10% of concrete pump; Improve the operational throughput about 10% of pump.
(4) can improve coagulation coagulated native ultimate compression strength 10%(3 days, 7 days, 28 days).
2. compare with the concrete of singly mixing calcium lignin sulphonate
(1) good to cement adaptability.Can be used for doing in the cement of adjustable solidification agent with fluorgypsum.
(2) early strength is higher.When particularly in concrete, mixing a certain amount of flyash.
(3) water-reducing rate has improved 2～4%.The about cement amount 3～5% of more piece.
(4) improve more obvious to concrete pumpability.Improve operational throughput 2～4%, reduce output pressure 3～5%.
3. compare with the concrete of singly mixing polycyclic aromatic hydrocarbon sulfonate:
(1) concrete pumpability is good.Bleeding is few, and slump-loss is little.
(2) at the bottom of the price, 1500 yuan of reductions per ton.Every m
3Concrete is saved 3～5 yuan.This pumping water reducer is specially adapted in the normal concrete of normal silicate, silicate, slag portland, trass cement preparation and the pump concrete more suitable to commerical ready-mixed concrete and large volume casting concrete.To the effect of reinforcing bar non-corroding, can be used in the Steel Concrete.Every m
3But concrete takes 1～3 yuan with this recombiner economical with materials.
Embodiment 1:
Get the 1kg calcium lignin sulphonate and the 1kg polycyclic aromatic hydrocarbon sulfonate mixes, get mixture a small amount of (2g), be made into 1% the aqueous solution.Surveying its surface tension is 50 ± 5 * 10
-3N/m; Flowing degree of net paste of cement be 100 ± 10mm(volume be cement weight 3 ‰).This mixture is placed in the plastics bag, prevents to make moist, in order to stand-by.
Embodiment 2:
To C20 level pump concrete, when cement consumption be this routine usefulness of 300kg(be to mix fluorgypsum to do Wusong of adjustable solidification agent and produce No. 425 slag cement, other No. 425 slag cement also can), concrete mix is C: G: S=1: 3.63: 2.83, W/C=0.56.Get this recombiner of 0.9kg and be dissolved in the mixing water, after other starting material stir, make pump concrete.Surveying its air content is 1.5～2.5%, and the slump is 12 ± 2cm, slump-loss 15min≤4cm, and the bleeding rate ratio is 80%, and compare with normal concrete concrete time of coagulation, and presetting period and final setting time be+60min～-90min.Concrete pumping pressure is 50～65MPa, and rate of pumping is 1.2～1.5m
3/ min.Ultimate compression strength 〉=20MPa of 28 days.
Claims (2)
1, a kind ofly is suitable for the pumping water reducer that concrete is used, it is characterized in that being composited by calcium lignosulfonate air-entraining water-reducing agent and polynuclear aromatic hydrocarbon sulfonate high-efficient water, forming weight percent is: calcium lignosulfonate air-entraining water-reducing agent is 30～50, and polynuclear aromatic hydrocarbon sulfonate high-efficient water is 70～50.
2, according to the described pumping water reducer of claim 1, the optimum proportion that it is characterized in that calcium lignosulfonate air-entraining water-reducing agent and polynuclear aromatic hydrocarbon sulfonate high-efficient water is 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100147 CN1019100B (en) | 1989-01-14 | 1989-01-14 | Concrete dewater agent of pumping over type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100147 CN1019100B (en) | 1989-01-14 | 1989-01-14 | Concrete dewater agent of pumping over type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034193A true CN1034193A (en) | 1989-07-26 |
| CN1019100B CN1019100B (en) | 1992-11-18 |
Family
ID=4853715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100147 Expired CN1019100B (en) | 1989-01-14 | 1989-01-14 | Concrete dewater agent of pumping over type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019100B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079382C (en) * | 1999-04-14 | 2002-02-20 | 济南华迪有限责任公司 | Composite additive for concrete |
| CN101875872B (en) * | 2009-11-04 | 2012-12-12 | 中建商品混凝土有限公司 | Lubricating agent used for pipeline of concrete pump and application thereof |
-
1989
- 1989-01-14 CN CN 89100147 patent/CN1019100B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079382C (en) * | 1999-04-14 | 2002-02-20 | 济南华迪有限责任公司 | Composite additive for concrete |
| CN101875872B (en) * | 2009-11-04 | 2012-12-12 | 中建商品混凝土有限公司 | Lubricating agent used for pipeline of concrete pump and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1019100B (en) | 1992-11-18 |
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| CF01 | Termination of patent right due to non-payment of annual fee |