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Concrete anti-cracking and anti-seepage admixture and preparation method thereof

A concrete and admixture technology, applied in the field of inorganic material processing, can solve the problems of high fly ash loss on ignition, affect water seepage effect, inconvenient use, etc., achieve less environmental pollution, lower production cost, increase compactness and The effect of abrasion resistance

Active Publication Date: 2021-09-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The anti-seepage and anti-cracking additives originally used for the purpose of soft waterproof and rainproof, such as asphalt, are prone to segregation problems. Temperature changes will cause segregation. Excessive mixing force of the paver will also cause segregation. The manual paving process cannot be mastered. Good strength will also produce segregation, and segregation will affect the seepage effect
The second generation of anti-permeability and anti-cracking additives is based on the first generation by adding fly ash and other expansion agents. Its main purpose is to compensate for cement shrinkage. It has a strong adsorption effect on water reducing agents, etc., and the concrete mix ratio needs to be adjusted, which is inconvenient to use

Method used

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  • Concrete anti-cracking and anti-seepage admixture and preparation method thereof
  • Concrete anti-cracking and anti-seepage admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A concrete anti-cracking and anti-seepage admixture, its preparation method is as follows:

[0018] 1) Weigh each raw material component according to the following proportions: 0.9% of ammonium pentaborate, 6% of polyaluminum sulfate, 3% of ammonium sulfate, 3% of potassium oleate, and 87.1% of water;

[0019] 2) Add ammonium pentaborate and water to the reaction kettle, stir at room temperature for 10 minutes (the stirring speed is 60r / min throughout the process), then add polyaluminum sulfate and stir for 10 minutes, then add ammonium sulfate, and keep stirring at 40°C After 15 minutes, add potassium oleate at last, stop heating after stirring for 85 minutes, and cool to room temperature to obtain concrete anti-cracking and anti-seepage admixture.

Embodiment 2

[0021] A concrete anti-cracking and anti-seepage admixture, its preparation method is as follows:

[0022] 1) Weigh each raw material component according to the following ratio: ammonium pentaborate 0.7%, polyaluminum sulfate 8.8%, ammonium sulfate 3.8%, potassium oleate 3%, water 83.7%;

[0023] 2) Add ammonium pentaborate and water to the reactor, stir at room temperature for 15 minutes, then add polyaluminum sulfate and stir for 25 minutes, then add ammonium sulfate, keep stirring at 45°C for 15 minutes, finally add potassium oleate, and stir for 65 minutes Finally, stop heating and cool to room temperature to obtain the concrete anti-crack and anti-seepage admixture.

Embodiment 3

[0025] A concrete anti-cracking and anti-seepage admixture, the preparation method is as follows:

[0026] 1) Weigh each raw material component according to the following proportions: 0.6% of ammonium pentaborate, 3% of polyaluminum sulfate, 5% of ammonium sulfate, 5% of potassium oleate, and 86.4% of water;

[0027] 2) Add ammonium pentaborate and water to the reactor, stir at room temperature for 15 minutes, then add polyaluminum sulfate and stir for 15 minutes, then add ammonium sulfate, keep the temperature at 30°C and stir for 20 minutes, finally add potassium oleate, stir for 70 After 10 minutes, stop heating and cool to room temperature to obtain the concrete anti-crack and anti-seepage admixture.

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Abstract

The invention relates to a concrete anti-cracking and anti-seepage admixture and the preparation method thereof. The concrete anti-cracking and anti-seepage admixture comprises the following raw material components in percentage by mass: 0.1-1% of ammonium pentaborate, 1-10% of polyaluminum sulfate, 3-5% of ammonium sulfate, 1-5% of potassium oleate and the balance of water. The concrete anti-cracking and anti-seepage admixture provided by the invention is low in doping amount and good in anti-cracking and anti-seepage effect, has no negative influence on the comprehensive performance of concrete, can obviously prolong the service life of the concrete, can reach the anti-seepage grade of P12 when the doping amount reaches 1-5%, has the service life of 20 years without seepage, and can replace the existing anti-seepage and anti-cracking products.

Description

technical field [0001] The invention belongs to the technical field of processing inorganic materials specially used to enhance the filling performance in mortar, concrete or artificial stone, and relates to a concrete anti-crack and anti-seepage admixture and a preparation method thereof. Background technique [0002] With the development of society, people have higher and higher requirements for the quality of life, which will inevitably lead to the rapid development of the construction industry, and the use of concrete will also increase sharply. Concrete is a heterogeneous brittle material formed by mixing sand and gravel aggregates, cement, water and other external materials. There are inevitably a large number of micro-voids, air pockets and micro-cracks in the hardened concrete. As time goes by, the micro-voids gradually develop into cracks. There are many reasons for concrete cracks, including cracks caused by deformation: cracks caused by temperature changes, shrin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04
CPCC04B40/0039C04B22/0013C04B22/148C04B22/147C04B24/04
Inventor 黄齐茂左芬龚慧敏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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