Seventy-two-hour super-slow-setting carboxylic acid pumping agent and preparation method thereof

A slow coagulation carboxylic acid and pumping agent technology, which is applied in the field of concrete admixtures, can solve problems such as short initial setting time and cannot meet the construction requirements of occlusal piles, and achieve the purpose of inhibiting cement hydration reaction, enhancing slump performance, and reducing time-lapse loss effect

Pending Publication Date: 2022-01-21
眉山海螺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a seventy-two-hour ultra-slow coagulation carboxylic acid pumping agent and its preparation method to solve the problem that the retarded high-performance pumping agent in the prior art has a relatively short initial setting time and cannot meet the requirements of interlocking. Technical Problems of Pile Construction Requirements

Method used

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  • Seventy-two-hour super-slow-setting carboxylic acid pumping agent and preparation method thereof
  • Seventy-two-hour super-slow-setting carboxylic acid pumping agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Include the following steps:

[0063] S1. Weigh sodium hexametaphosphate, sodium gluconate, sugar, air-entraining agent, hydroxyethyl methyl cellulose ether, water retaining agent, polycarboxylate water reducer mother liquor, polycarboxylate slump retaining agent mother liquor and water according to the ratio ;

[0064] S2, adding water into the reaction vessel;

[0065] S3, start stirring and keep stirring state (stirring speed is 1000r / min), add sodium hexametaphosphate, sodium gluconate and white sugar in reaction vessel; Then stir for 15min;

[0066] S4, keep stirring state (stirring speed is 1000r / min), add air-entraining agent in reaction vessel, then stir 15min;

[0067] S5, keep stirring state (stirring speed is 1000r / min), add polycarboxylate superplasticizer mother liquor, polycarboxylate slump retaining agent mother liquor in reaction vessel, stir 15min;

[0068] S6. Keep stirring (stirring speed is 1000r / min), add water retaining agent and hydroxyethyl ce...

Embodiment 2

[0070] Include the following steps:

[0071] S1. Weigh sodium hexametaphosphate, sodium gluconate, sugar, air-entraining agent, hydroxyethyl methyl cellulose ether, water retaining agent, polycarboxylate water reducer mother liquor, polycarboxylate slump retaining agent mother liquor and water according to the ratio ;

[0072] S2, adding water into the reaction vessel;

[0073] S3, start stirring and keep stirring state (stirring speed is 1200r / min), add sodium hexametaphosphate, sodium gluconate and white sugar in reaction vessel; Then stir for 10min;

[0074] S4, keep stirring state (stirring speed is 1200r / min), add air-entraining agent in reaction vessel, then stir 10min;

[0075] S5, keep stirring state (stirring speed is 1200r / min), add polycarboxylate superplasticizer mother liquor, polycarboxylate slump retaining agent mother liquor in reaction vessel, stir 10min;

[0076] S6. Keep stirring (stirring speed is 1200r / min), add water retaining agent and hydroxyethyl cell...

Embodiment 3

[0078] Include the following steps:

[0079] S1. Weigh sodium hexametaphosphate, sodium gluconate, sugar, air-entraining agent, hydroxyethyl methyl cellulose ether, water retaining agent, polycarboxylate water reducer mother liquor, polycarboxylate slump retaining agent mother liquor and water according to the ratio ;

[0080] S2, adding water into the reaction vessel;

[0081] S3, start stirring and keep stirring state (stirring speed is 800r / min), add sodium hexametaphosphate, sodium gluconate and white sugar in reaction vessel; Then stir for 20min;

[0082] S4, keep stirring state (stirring speed is 800r / min), add air-entraining agent in reaction vessel, then stir 20min;

[0083] S5, keep stirring state (stirring speed is 800r / min), add polycarboxylate superplasticizer mother liquor, polycarboxylate slump retaining agent mother liquor in reaction vessel, stir 20min;

[0084] S6. Keep stirring (stirring speed is 800r / min), add water retaining agent and hydroxyethyl cellul...

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Abstract

The invention discloses a seventy-two-hour super-slow-setting carboxylic acid pumping agent and a preparation method thereof, and solves the technical problem that the initial setting time of a slow-setting high-performance pumping agent in the prior art is relatively short and cannot meet the construction requirements of secant piles. The pumping agent comprises the following raw materials in percentage by weight: 0.5-1.0% of sodium hexametaphosphate, 5.0%-10.0% of sodium gluconate, 1.0%-3.0% of white sugar, 0.05%-0.1% of an air entraining agent, 0.05%-0.1% of hydroxyethyl methyl cellulose ether, 0.2%-1.0% of a water-retaining agent, 15%-25% of polycarboxylate superplasticizer mother liquor, 5%-15% of polycarboxylic acid slump retaining agent mother liquor, and the balance water. According to the pumping agent disclosed by the invention, on the premise of ensuring the water-reducing rate of concrete, the setting time of the concrete can be prolonged to 72 hours or more, the later strength of the concrete is not influenced, and the requirements of a secant pile construction process are met.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a 72-hour ultra-slow coagulation carboxylic acid pumping agent and a preparation method thereof. Background technique [0002] The occlusal pile is a foundation pit enclosure structure in which the piles are interlocked with each other. The arrangement of the piles is an unreinforced ultra-retarded concrete pile (A pile) and a reinforced concrete pile (B pile) (constructed by a full casing drilling rig) at intervals. During construction, pile A is constructed first, and pile B is constructed later, and the construction of pile B is completed after the initial setting of the concrete of pile A and before final setting. Concrete pouring, because pile A must be cut during the construction of pile B, when the concrete of pile A has not reached a certain strength, the grinding and undercutting of the casing drilling rig will cause damage to the concrete of pile A. For th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B22/16C04B24/06C04B24/10C04B2103/304C04B24/383C04B2103/465C04B24/24C04B22/002
Inventor 范显军张冲龚磊彭方舟李成勇周进
Owner 眉山海螺新材料科技有限公司
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