CN104098286A - Special concrete pumping agent for ultra-high buildings and preparation method thereof - Google Patents

Abstract

The invention relates to a special pumping agent for super high-rise building concrete, which consists of polyether monomer containing double bonds, unsaturated carboxylic acid and its derivative monomer, unsaturated carboxylic acid ester and its derivative monomer, secreted It is prepared from the raw materials of water-improving additives, chain transfer agents, and initiators, including polyether monomers containing double bonds, unsaturated carboxylic acids and their derivative monomers, unsaturated carboxylic acid esters and their derivative monomers and bleeding-improving additives together form a water-reducer, and the added amount of the initiator and the chain transfer agent are respectively 0.2-0.5% and 0.05-0.2% of the total weight of the water-reducer. The special pumping agent for super high-rise building concrete of the present invention does not need to be compounded with other additives, the composition is simple, it has the effect of reducing water and slump of concrete, and reduces the initial viscosity of concrete, avoiding the water phenomenon when pumping super high-rise concrete , suitable for smooth pumping of concrete in super high-rise buildings above 100 meters.

Description

A special pumping agent for super high-rise building concrete and its preparation method

technical field

The invention relates to the technical field of building materials, in particular to a special pumping agent for super high-rise building concrete and a preparation method thereof.

Background technique

With the increase of construction projects, pumped concrete is widely used. Due to the high strength, high viscosity and easy segregation of construction concrete, it is prone to serious collapse during the pumping process. In order to reduce the collapse during the construction concrete pumping process, generally Admixtures are added to concrete to reduce water and slump, reduce slump damage, and reduce pumping difficulty. At present, most of the pumping agents need to be obtained through the compounding method, that is, several commonly used water reducers, such as polycarboxylate water reducers and retarders, water retaining agents, air-entraining agents and other additives are mixed in a certain proportion. However, the composition of this type of concrete admixture is more complicated, and the preparation process is more troublesome, and it is only effective when pumping middle and low-rise concrete. For high-rise building concrete pumping, especially when super high-rise building concrete pumping is more than 100 meters, it needs The pumping pressure is very high, and the high pressure will cause the concrete to bleed, resulting in concrete segregation, severe collapse or blockage of the pump, making it difficult to pump the concrete.

Contents of the invention

The technical problem to be solved by the present invention is to provide a special pumping agent for super high-rise building concrete and its preparation method in view of the shortcomings of the above-mentioned prior art.

The technical scheme that the present invention adopts for solving the above-mentioned problem is:

A special pumping agent for super high-rise building concrete, which consists of polyether monomers containing double bonds, unsaturated carboxylic acids and their derivative monomers, unsaturated carboxylic acid esters and their derivative monomers, bleeding-improving type It is prepared from the raw materials of additives, chain transfer agents and initiators, including polyether monomers containing double bonds, unsaturated carboxylic acids and their derivative monomers, unsaturated carboxylic acid esters and their derivative monomers, bleeding The improved additives together form a water reducer; the addition amount of the initiator is 0.2-0.5% of the total weight of the water reducer, and the addition amount of the chain transfer agent is 0.05-0.5% of the total weight of the water reducer. 0.2%.

According to the above scheme, the water reducer is calculated by weight percentage, and its components are as follows: 60-90% of polyether monomers containing double bonds, 8-30% of unsaturated carboxylic acid and its derivative monomers, not Saturated carboxylic acid ester and its derivatives monomer 1-10%, bleeding-improving additive 1-10%.

According to the above scheme, the chemical structural formula of the polyether monomer containing double bonds is as shown in formula 1:

In Formula 1, R ₁ and R ₂ respectively represent a hydrogen atom or one of the alkyl groups with 1 to 3 carbon atoms; X is one of the carbon atoms, methylene or alkyl groups with 1 to 10 carbon atoms ; R ₃ O is an alkoxy group with 2 to 5 carbon atoms, a is the polymerization degree of the alkoxy group, and its value is 9 to 100; R ₄ is a hydrogen atom or an alkyl group with 1 to 3 carbon atoms; n It is the degree of polymerization, and its value is 9-100.

According to the above scheme, the chemical structural formula of the unsaturated carboxylic acid and derivative monomer thereof is as shown in formula 2:

In formula 2, R ₅ and R ₆ represent one of hydrogen atom, methyl or carboxyl, and R ₅ and R ₆ cannot be carboxyl at the same time; R ₇ represents one of hydrogen atom, methyl or carboxyl; M Indicates one of hydrogen atom, monovalent metal ion or divalent metal ion; m is the degree of polymerization, and its value is 9-100.

According to the above scheme, the unsaturated carboxylic acid ester and its derivative monomers are methyl acrylate, ethyl acrylate, isobutyl acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, methyl methacrylate, methacrylic acid One or more mixtures of ethyl ester and isobutyl methacrylate in any proportion.

According to the above solution, the bleeding-improving additive is acrylamide monomer or a starch acrylate with a molecular weight of 1000-10000.

According to the above scheme, the chain transfer agent is one or more of mercaptoethanol, 2-hydroxypropanethiol, thioglycolic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, and 2-mercaptosuccinic acid. Proportional mixture.

According to the above scheme, the initiator is one or more mixtures in any proportion among ammonium persulfate, potassium persulfate and azobisisobutyronitrile.

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) According to the above ratio, weigh 60-90 parts of polyether monomers containing double bonds, 8-30 parts of unsaturated carboxylic acid and its derivative monomers, and 1-30 parts of unsaturated carboxylic acid esters and their derivative monomers. 10 parts, 1-10 parts of water-improving additives, including polyether monomers containing double bonds, unsaturated carboxylic acids and their derivative monomers, unsaturated carboxylic acid esters and their derivative monomers, bleeding improvement type additives together to form a water reducer, the weight of the initiator is 0.2-0.5% of the total weight of the water reducer, and the weight of the chain transfer agent is 0.05-0.2% of the total weight of the water reducer. spare;

2) dissolving the unsaturated carboxylic acid and its derivative monomer, the unsaturated carboxylic acid ester and its derivative monomer, and the chain transfer agent in water to form an aqueous solution A, and dissolving the initiator in water to form an aqueous solution B;

3) Under nitrogen atmosphere, add polyether monomers containing double bonds and bleeding-improving additives into water, stir until the polyether monomers containing double bonds and water-improving additives are completely dissolved, then raise the temperature to 60 At ~80°C, add aqueous solution A and aqueous solution B dropwise at the same time, and the dropping time is controlled to 1~4h; after the dropwise addition, keep warm for 1~3.5h. After the reaction, cool down and add alkali and a small amount of water to adjust the pH to 6~7 , that is, to obtain a special pumping agent for super high-rise building concrete.

According to the above scheme, the amount of water in the aqueous solution A, aqueous solution B and step 3) is determined according to the actual situation, and according to the solid content requirements of the prepared super high-rise building concrete pumping agent, the required water in the preparation process can be calculated. The total amount usually makes the solid content of the special pumping agent for super high-rise building concrete at 30-60%.

According to the scheme, the alkali is caustic soda or caustic soda aqueous solution.

The special pumping agent for super high-rise building concrete of the present invention can be applied to super high-rise pumping concrete, and its dosage as an admixture is 1.0-1.8%. The dosage range is based on the solid content of 30-60%, and the specific dosage can be adjusted according to the actual solid content.

Compared with prior art, the beneficial effect of the present invention is:

The special pumping agent for super high-rise building concrete and the preparation method thereof of the present invention use unsaturated polyether monomers containing double bonds as main raw materials, add unsaturated carboxylic acid and its derivative monomers and unsaturated carboxylic acid and its derivative monomers It is used to introduce carboxyl group with adsorption function into the molecular structure of high molecular polymer, and release the ester group of carboxyl group and the side chain with water retention function after hydrolysis under concrete alkaline conditions. The special pumping agent for super high-rise building concrete of the present invention does not need to be compounded with other additives (such as retarder, water-retaining agent, air-entraining agent, etc.), and the composition is simple. The special pumping agent for super high-rise building concrete of the present invention has the effect of water-reducing and slump-preserving concrete, and also reduces the initial viscosity of concrete, avoids the water phenomenon when super high-rise concrete is pumped, and is suitable for the smooth operation of super high-rise building concrete over 100 meters. pumping.

Detailed ways

In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the present invention is not limited to the following examples.

Example 1

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) Carboxylic acid A, methyl acrylate and mercaptoethanol are dissolved in 80g water to form aqueous solution A, and ammonium persulfate is dissolved in 80g water to form aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-neck flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether A and starch acrylate in sequence, heat and stir in a water bath, and control the temperature at about 40°C ; After the polyether A and starch acrylate are fully dissolved, slowly raise the temperature to 60°C, and then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 1h; Cool down to 40°C, add 32wt% caustic soda solution for neutralization and deionized water, adjust its pH to 6, and obtain a slightly yellow viscous copolymer with a solid content of about 40%, to obtain the super high-rise building concrete Special pumping agent.

Concrete reaction equation is as follows:

Example 2

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) Sodium carboxylate B, ethyl acrylate, and 2-hydroxypropanethiol were dissolved in 80g water to form aqueous solution A, and ammonium persulfate was dissolved in 80g water to form aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-neck flask equipped with a thermometer, agitator and dropping funnel, add 100g of deionized water, polyether B and starch acrylate in sequence, heat and stir in a water bath, and control the temperature at about 40°C ; After the polyether B and starch acrylate are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; Then cool down to 40°C, add caustic soda to neutralize and deionized water, adjust its pH to 7, and obtain a light yellow viscous copolymer with a solid content of about 40%, which is the special pumping agent for super high-rise building concrete. agent.

Example 3

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) Calcium carboxylate C, isobutyl acrylate and mercaptoacetic acid were dissolved in 80g water to form aqueous solution A; the potassium persulfate was dissolved in 80g water to form aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-necked flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether C and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C About; After the polyether C and acrylamide monomer are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B, and the dropping time is controlled at 3h; after the dropwise addition is completed, continue to keep warm at 80°C for 3.5h , then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust its pH to 7, and obtain a slightly yellow viscous copolymer with a solid content of about 40%, which is the special pump for super high-rise building concrete Send agent.

Example 4

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) Magnesium carboxylate D, hydroxyethyl acrylate and 2-mercaptopropionic acid were dissolved in 80 g of water to form an aqueous solution A; the azobisisobutyronitrile was dissolved in 80 g of water to form an aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-neck flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether D and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C After the polyether D and the acrylamide monomer are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; h, then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust its pH to 7, and obtain a slightly yellow viscous copolymer with a solid content of 40%, which is the special pump for super high-rise building concrete. Send agent.

Example 5

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) The potassium carboxylate E, hydroxypropyl acrylate and 3-mercaptopropionic acid are dissolved in 80g water to form an aqueous solution A; the azobisisobutyronitrile and ammonium persulfate are dissolved in 80g water to form an aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-neck flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether E and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C About; After the polyether E and acrylamide monomer are fully dissolved, slowly raise the temperature to 80°C, and at the same time start to drop the aqueous solution A and aqueous solution B, and the dropping time is controlled at 3h; after the dropwise addition, continue to keep warm at 80°C for 3.5h , then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust the pH of the resulting product to 7, and obtain a slightly yellow viscous copolymer with a solid content of 40%, which is the special pump for super high-rise building concrete. Send agent.

Example 6

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) The potassium carboxylate F, methyl methacrylate and 2-mercaptosuccinic acid are dissolved in 80g water to form an aqueous solution A; the azobisisobutyronitrile and ammonium persulfate are dissolved in 80g water to form an aqueous solution A; into an aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-necked flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether F and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C After the polyether F and the acrylamide monomer are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; h, then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust the pH of the resulting product to 7, and obtain a slightly yellow viscous copolymer with a solid content of 40%, which is the concrete for super high-rise buildings. pumping agent.

Example 7

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) The potassium carboxylate G, methyl methacrylate, 2-mercaptosuccinic acid and mercaptoacetic acid are dissolved in 80g water to form aqueous solution A; the azobisisobutyronitrile and ammonium persulfate are dissolved in 80g of water is made into aqueous solution B;

3) Under nitrogen protection, in a 500ml four-necked flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether G and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C After the polyether G and acrylamide monomers are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; h, lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust the pH of the resulting product to 7, and prepare a slightly yellow viscous copolymer with a solid content of 40%, which is the special pump for super high-rise building concrete. Send agent.

Example 8

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) Dissolving the calcium carboxylate H, ethyl methacrylate, and mercaptoacetic acid in 80g water together to form an aqueous solution A; dissolving the potassium persulfate in 80g water to form an aqueous solution B;

3) Under the protection of nitrogen, in a 500ml four-necked flask equipped with a thermometer, a stirrer and a dropping funnel, add 100g of deionized water, polyether H and acrylamide monomer in sequence, heat and stir in a water bath, and control the temperature at 40°C After the polyether H and acrylamide monomer are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; h, then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust the pH of the resulting product to 7, and obtain a slightly yellow viscous copolymer with a solid content of 40%, which is the concrete for super high-rise buildings. pumping agent.

Example 9

A special pumping agent for super high-rise building concrete, which is prepared from the following raw materials in solvent water, and the dosage of each raw material is as follows:

The preparation method of the above-mentioned special pumping agent for super high-rise building concrete comprises the following steps:

1) With the above proportioning ratio, take each raw material for subsequent use;

2) the calcium carboxylate I, ethyl methacrylate, and mercaptoacetic acid are dissolved in 80g water to make aqueous solution A; the potassium persulfate is dissolved in 80g water to make aqueous solution B;

3) Under nitrogen protection, in a 500ml four-necked flask equipped with a thermometer, a stirrer and a dropping funnel, sequentially add 100g of deionized water, polyether I and acrylamide monomer, heat and stir in a water bath, and control the temperature at 40°C After the polyether I and acrylamide monomers are fully dissolved, slowly raise the temperature to 80°C, then start to drop the aqueous solution A and aqueous solution B at the same time, and the dropping time is controlled at 3h; h, then lower the temperature to 40°C, add caustic soda to neutralize and deionized water, adjust the pH of the product to 7, and obtain a slightly yellow viscous copolymer with a solid content of 40%, which is the special pump for super high-rise building concrete. Send agent.

Application example

The concrete pumping agent provided in Examples 1-9 was used as an admixture in the preparation of C50 super high-rise pumping concrete. The specific performance test is shown in Table 2. The comparison sample is a commercially available high water-reducing polycarboxylic acid product .

C50 super high-rise pumped concrete can be prepared according to the following specific raw material ratios, see Table 1 for details.

Table 1 Specific raw material ratio of C50 super high-rise pumped concrete

Note: The meaning of the amount of admixture is: the percentage of the admixture in the total weight of the cementitious material (the total weight of cement, mineral powder, fly ash and silica fume) by weight.

The cement is P.O42.5 ordinary Portland cement produced by Huangshi Huaxin Cement Factory; the mineral powder is produced by Wuxin Mineral Powder Factory; the fly ash is Yangluo Ⅱ grade ash; The modulus is 2.6; the crushed stone is continuously graded crushed stone with a particle size of 5-20mm.

Table 2

Through the results of concrete slump expansion and expansion time test, U-shaped instrument test and compressive bleeding test, it can be seen that the concrete prepared with 1-9 super high-rise special pumping agent has greater fluidity, and the expansion can reach 700mm above, and has a small viscosity and good filling ability, can pass through the I-type U-shaped instrument smoothly, and the height difference of the U-shaped instrument is 0mm, and the comparison sample (commercially available high water-reducing polycarboxylic acid product) is used. The concrete of preparation has bigger viscosity; In addition, the compressive bleeding rate result that records by compressive bleeding test method can find out that the compressive bleeding rate of the concrete that uses the pumping agent of the present invention to make is all higher than common The commercially available water reducer is small (when the compressive bleeding rate is 1.0%, it is reduced by about 71%), it has good anti-segregation bleeding, and fully meets the requirements of super high-rise concrete against segregation bleeding. Therefore, the super-high-rise special pumping agent synthesized by the present invention can meet the requirements of engineering construction for anti-segregation bleeding and super-high-rise pumping.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the creative concept of the present invention, some improvements and changes can also be made, and these all belong to the present invention scope of protection.

Claims (9)

1. the special-purpose pumping agent of a high-rise building concrete, it is characterized in that it is prepared from by the raw material that comprises double bond containing polyether monomer, unsaturated carboxylic acid and derivatives monomer thereof, esters of unsaturated carboxylic acids and derivatives monomer thereof, the improved-type auxiliary agent of bleeding, chain-transfer agent, initiator, wherein double bond containing polyether monomer, unsaturated carboxylic acid and derivatives monomer thereof, esters of unsaturated carboxylic acids and derivatives monomer thereof, the improved-type auxiliary agent of bleeding form water reducer jointly; The add-on of described initiator is 0.2～0.5% of described water reducer gross weight, and the add-on of described chain-transfer agent is 0.05～0.2% of described water reducer gross weight.

2. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1, it is characterized in that described water reducer by weight percentage, its each component concentration is as follows: double bond containing polyether monomer 60～90%, unsaturated carboxylic acid and derivatives monomer 8～30% thereof, esters of unsaturated carboxylic acids and derivatives monomer 1～10% thereof, the improved-type auxiliary agent 1～10% of bleeding.

3. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1 and 2, is characterized in that the chemical structural formula of described double bond containing polyether monomer as shown in Equation 1:

In formula 1, R ₁and R ₂represent respectively a kind of in the alkyl of hydrogen atom or 1～3 carbon atom; X is a kind of in the alkyl of carbon atom, methylene radical or 1～10 carbon atom; R ₃o is the alkoxyl group of 2～5 carbon atoms, the polymerization degree that a is this alkoxyl group, and its value is 9～100; R ₄alkyl for hydrogen atom or 1～3 carbon atom; N is the polymerization degree, and its value is 9～100.

4. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1 and 2, is characterized in that the chemical structural formula of described unsaturated carboxylic acid and derivatives monomer thereof as shown in Equation 2:

In formula 2, R ₅and R ₆represent respectively a kind of in hydrogen atom, methyl or carboxyl and R ₅and R ₆can not be carboxyl simultaneously; R ₇represent a kind of in hydrogen atom, methyl or carboxyl; M represents a kind of in hydrogen atom, monovalent metallic ion or divalent-metal ion; M is the polymerization degree, and its value is 9～100.

5. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1 and 2, is characterized in that described esters of unsaturated carboxylic acids and derivatives monomer thereof are one or more mixtures in any proportion in methyl acrylate, ethyl propenoate, isobutyl acrylate, Hydroxyethyl acrylate, Propylene glycol monoacrylate, methyl methacrylate, β-dimethyl-aminoethylmethacrylate, Propenoic acid, 2-methyl, isobutyl ester.

6. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1 and 2, is characterized in that the improved-type auxiliary agent of described bleeding is starch acrylamide acid esters a kind of of acrylamide monomer or molecular weight 1000～10000.

7. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1, is characterized in that described chain-transfer agent is one or more mixtures in any proportion in mercaptoethanol, 2-hydroxyl propylmercaptan, Thiovanic acid, 2 mercaptopropionic acid, 3-thiohydracrylic acid, 2-dimercaptosuccinic acid.

8. the special-purpose pumping agent of a kind of high-rise building concrete according to claim 1, is characterized in that described initiator is one or more mixtures in any proportion in ammonium persulphate, Potassium Persulphate, Diisopropyl azodicarboxylate.

9. the preparation method of the special-purpose pumping agent of the high-rise building concrete described in one of claim 1-8, is characterized in that comprising the steps:

1) with said ratio, take containing 1～10 part of two strong 60～90 parts of polyether monomers, unsaturated carboxylic acid and 8～30 parts of derivatives monomers thereof, esters of unsaturated carboxylic acids and 1～10 part of derivatives monomer thereof, the improved-type auxiliary agent in Qinshui, wherein double bond containing polyether monomer, unsaturated carboxylic acid and derivatives monomer thereof, esters of unsaturated carboxylic acids and derivatives monomer thereof, the improved-type auxiliary agent of bleeding form water reducer jointly, the amount that takes initiator is 0.2～0.5% of described water reducer gross weight, the amount that takes chain-transfer agent is 0.05～0.2% of described water reducer gross weight, standby;

2) unsaturated carboxylic acid and derivatives monomer, esters of unsaturated carboxylic acids and derivatives monomer thereof, chain-transfer agent are jointly dissolved in to water and are made into water solution A, initiator is dissolved in to water and is made into aqueous solution B;

3) under nitrogen atmosphere, double bond containing polyether monomer and the improved-type auxiliary agent of bleeding are added to the water, after being stirred to the improved-type auxiliary agent in double bond containing polyether monomer and Qinshui and dissolving completely, are warming up to 60～80 ℃, drip water solution A and aqueous solution B, time for adding controls to 1～4h simultaneously; Dropwise rear insulation reaction 1～3.5h, after reaction finishes, cooling adds alkali and water, and to be adjusted to pH be 6～7, obtains the special-purpose pumping agent of high-rise building concrete.