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A kind of pumping agent and preparation method thereof

A technology of pumping agent and water reducing agent, which is applied in the field of pumping agent and its preparation, which can solve problems such as troublesome operation, increased cost of labor and time control, and achieve the effect of saving time and cost and improving pumping performance

Active Publication Date: 2021-11-30
吉安市金羧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are two problems in this conventional "eliminate first and then introduce" technology: one is that an additional defoamer needs to be added to achieve the defoaming function, which is troublesome to operate and requires formula adjustment; Gas components need to be artificially added to the concrete for defoaming for a period of time before adding pumping agent to achieve the effect of "eliminating first and then leading", but this will increase the cost of labor and time control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a pumping agent, which is composed of the following raw materials in parts by weight: 30 parts of modified polycarboxylate water reducer, 1 part of retarder, 5 parts of lubricant, air-entrained 1 part of agent and 0.5 part of slow-release coating material, the modified polycarboxylic acid type water reducer is formed by the reaction of vinyl hydroxy silicone oil, sodium alkenyl sulfonate and fatty acid, and the slow-release coating material is water-soluble Envelope material.

[0030] The structural formula of the vinyl hydroxy silicone oil is:

[0031] , where z=0.

[0032] The structural formula of the modified polycarboxylate water reducer is:

[0033] , where x=1, y=1.

[0034] The synthesis process of the modified polycarboxylic acid type water reducer is:

[0035] (1) After mixing the sodium alkenyl sulfonate and the initiator evenly, slowly add it dropwise into vinyl hydroxy silicone oil at a temperature of 65°C, control the dropp...

Embodiment 2

[0047] This embodiment provides a pumping agent, which is composed of the following raw materials in parts by weight: 37 parts of modified polycarboxylate water reducer, 1.5 parts of retarder, 6.5 parts of lubricant, air-entrained 3 parts of agent and 0.7 part of sustained-release coating material.

[0048] In the structural formula of the modified polycarboxylate water reducer, x=25, y=10, z=50. .

[0049] The synthesis process of the modified polycarboxylic acid type water reducer is:

[0050] (1) After mixing the sodium alkenyl sulfonate and the initiator evenly, slowly add it dropwise into vinyl hydroxy silicone oil at a temperature of 68°C, control the dropping time for 1.5h, and the stirring speed during the dropping process is 90r / min, Continue to react for 5.5 hours after the dropwise addition, and reduce the stirring speed to 65 r / min;

[0051] (2) After mixing the fatty acid and the catalyst evenly, slowly add it dropwise to the reaction product obtained in step (...

Embodiment 3

[0061] This embodiment provides a pumping agent, which is composed of the following raw materials in parts by weight: 45 parts of modified polycarboxylate water reducer, 2 parts of retarder, 8 parts of lubricant, air-entrained 5 parts of agent and 1 part of sustained-release coating material.

[0062] In the structural formula of the modified polycarboxylate water reducer, x=50, y=20, z=100.

[0063] The synthesis process of the modified polycarboxylic acid type water reducer is:

[0064] (1) After mixing the sodium alkenyl sulfonate and the initiator evenly, slowly add it dropwise into vinyl hydroxy silicone oil at a temperature of 70°C, control the dropping time for 2 hours, and the stirring speed during the dropping process is 100r / min, drop Continue to react for 6 hours after adding, and reduce the stirring speed to 70 r / min;

[0065] (2) After mixing the fatty acid and the catalyst evenly, slowly add it dropwise to the reaction product obtained in step (1), stir and rea...

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Abstract

The invention discloses a pumping agent and a preparation method thereof. The pumping agent is composed of the following raw materials in parts by weight: 30-45 parts of modified polycarboxylic acid type water reducer, 1-2 parts of retarder, 5-8 parts of lubricant, 1-5 parts of air-entraining agent and 0.5-1 part of slow-release coating material, the modified polycarboxylate water reducer reacts with vinyl hydroxy silicone oil, sodium olefin sulfonate and fatty acid Formed, the sustained-release coating material is a water-soluble coating material. The pumping agent provided by the present invention, by introducing defoaming groups into the water reducing agent component of the pumping agent, the pumping agent has both the functions of water reducing and defoaming, and the air-entraining agent component is released slowly Coating, first defoaming and then entraining air, this can better control the air content of the concrete, improve the performance of concrete pumping, and the whole process does not need manual control, saving time and cost.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and more specifically relates to a pumping agent and a preparation method thereof. Background technique [0002] Pumping agent, also known as concrete pumping agent, is an admixture to improve concrete pumping performance. The so-called pumpability means that the concrete mixture can pass through the pipeline smoothly without clogging, segregation, and good viscoplasticity. The pumping agent is usually made of water reducing agent, retarder, air entraining agent, lubricant and so on. Air-entraining agent refers to the addition of a large number of uniformly distributed micro-bubbles that can be introduced during the concrete mixing process to reduce bleeding and segregation of the concrete mixture, improve workability, and significantly improve the frost resistance and durability of hardened concrete. agent. Due to the existence of a large number of tiny, closed and uniformly distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C08F283/12C08F228/02C08F8/14
CPCC04B40/0039C08F8/14C08F283/124C08F228/02C04B24/42C04B24/10C04B14/024C04B24/34C04B18/0481C04B14/064C04B24/32
Inventor 曾令彰涂春明
Owner 吉安市金羧科技有限公司
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