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Multifunctional anti-cracking water-proofing agent available for pumping concrete

A technology for pumping concrete and anti-cracking waterproofing agent, which is applied in the field of building materials and can solve problems such as difficult maintenance, drying shrinkage and cracking, and large dosage

Pending Publication Date: 2016-07-06
WENDENG LANDAO ARCHITECTURAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all have disadvantages such as large dosage, difficult maintenance, high total alkali, poor adaptability, and limited functions to varying degrees.
After use, the concrete will have different degrees of plugging, difficulty in pumping, difficulty in controlling the setting time, shrinkage, cracking and leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] High-concentration Cai series superplasticizer 250; sodium lauryl sulfate 2.7; sodium gluconate 9.5; hydroxypropyl methylcellulose 1.5; sodium polyacrylate 220; sodium methyl siliconate 1.75; silicon dioxide 300; water 550. The 7-day compressive strength of the obtained product is not less than 158, and the 28-day compressive strength is not less than 137. Penetration ratios are all lower than 28%. The compressive strength loss ratio is not greater than 49. The mass loss rate is not greater than 64. The water reduction rate reaches 16%, and the bleeding rate ratio reaches 25%.

Embodiment 2

[0017] High-concentration Cai series superplasticizer 150; sodium lauryl sulfate 2.0; sodium gluconate 6.5; hydroxypropyl methylcellulose 0.9; sodium polyacrylate 180; sodium methyl siliconate 0.5; silicon dioxide 120; water 460. The 7-day compressive strength is not less than 151, and the 28-day compressive strength is not less than 133. Penetration ratios are all lower than 28%. The compressive strength loss ratio is not greater than 47. The mass loss rate is not greater than 66. It can make the water reduction rate reach 18%, and the bleeding rate ratio reach 35%.

Embodiment 3

[0019] High-concentration Cai series superplasticizer 230; sodium lauryl sulfate 2.7; sodium gluconate 9.5; hydroxypropyl methylcellulose 1.5; sodium polyacrylate 220; sodium methyl siliconate 1.75; silicon dioxide 300; water 550. The 7-day compressive strength of the obtained product is not less than 168, and the 28-day compressive strength is not less than 147. The penetration ratios are all lower than 23%. The compressive strength loss ratio is not greater than 41. The mass loss rate is not more than 60%. The water reduction rate reaches 26%, and the bleeding rate ratio reaches 35%.

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Abstract

The invention discloses a multifunctional anti-cracking water-proofing agent available for pumping concrete. The multifunctional anti-cracking water-proofing agent comprises the following components: a high-concentration naphthalene-based superplasticizer, sodium dodecyl sulfate, sodium gluconate, hydroxypropyl methylcellulose, sodium polyacrylate, sodium methylsilanolate, silicon dioxide and water. The multifunctional anti-cracking water-proofing agent provided by the invention can significantly improve the early strength of mortar and concrete, increase the liquidity, improves the plasticity maintaining capacity, is suitable for waterproof mortar and waterproof concrete of underground engineering, dams, construction engineering and traffic engineering, and is also suitable for pumping concrete.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an anti-cracking waterproofing agent which can be used for pumping concrete. Background technique [0002] In all kinds of building construction, a large amount of concrete is used. Cracking in the process of pouring concrete has always been a problem that has been difficult to solve in construction quality. It has long plagued various construction and user units and affected the normal use of buildings. The service life of concrete has been reduced, especially since commercial concrete (ready-mixed concrete) has been used in large quantities in order to alleviate urban pollution, the concrete crack phenomenon through long-distance transportation is more serious. In order to solve this long-standing technical problem, after long-term practice and exploration, people in the industry have found out that the main factor of concrete cracking is caused by deformation. The deformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/65
CPCC04B40/0039C04B2103/65C04B2201/05C04B2201/50C04B2103/302C04B24/16C04B24/04C04B24/383C04B24/2641C04B24/42C04B22/06
Inventor 李文博
Owner WENDENG LANDAO ARCHITECTURAL ENG CO LTD
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