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A method for preparing asphalt base waterproofing material

A waterproof material, asphalt-based technology, applied in building thermal insulation materials, chemical instruments and methods, building components, etc., can solve problems affecting product use and quality, unguaranteed uniformity and stability, poor compatibility, etc.

Inactive Publication Date: 2009-08-26
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bentonite is an inorganic mineral. According to the principle of similar compatibility, the problem encountered when inorganic bentonite is mixed with organic asphalt is that the compatibility is relatively poor. After mixing bentonite with asphalt, long-term storage of the product will make it uniform. and stability are not guaranteed, affecting the use and quality of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] a. Immerse the purified bentonite crushed by conventional methods in water, add quaternary ammonium salt cations under constant temperature conditions of 75°C, wherein the addition of quaternary ammonium salt cations is 1% of the cation exchange capacity of bentonite, stir for 50min, and obtain the expansion capacity It is 35ml modified bentonite;

[0013] b. Evenly mix 10% of the asphalt mass modified bentonite into construction asphalt, mix evenly to make thin slices with a uniform thickness of 5 mm, freeze at -13°C for 1 hour, break the thin slices evenly, and make the gap between the two pieces Form a gap with a width of 0.3mm, add tap water from the upper part of the gap to cause leakage, and the gap will stop leaking after 25 minutes, and the waterproof material can be obtained.

Embodiment 2

[0015] a. Immerse the purified bentonite after being pulverized by conventional methods in water, add quaternary ammonium salt cations under constant temperature conditions of 75°C, wherein the addition of quaternary ammonium salt cations is 5% of the cation exchange capacity of bentonite, stir for 70min, and obtain the expansion capacity Be the modified bentonite of 20ml;

[0016] b. Mix 30% of asphalt mass modified bentonite into building asphalt, mix evenly to make thin slices with a uniform thickness of 5 mm, freeze at -13°C for 2 hours, break the thin slices evenly, and take one of the fragments The section and the glass surface form a gap with a distance of 0.3 mm. Water leaks from the upper part of the gap, and the gap stops leaking after 28 minutes, and the waterproof material can be obtained.

Embodiment 3

[0018] a. Immerse the bentonite after pulverizing and purifying by conventional method in water, add quaternary ammonium salt cation under 75 ℃ constant temperature condition, wherein the addition of quaternary ammonium salt cation is 9% of bentonite cation exchange capacity, stir 80min, obtain expansion capacity 10ml modified bentonite;

[0019] b. Evenly mix the modified bentonite which accounts for 40% of the asphalt mass into the building asphalt, mix it evenly to make a thin slice with a uniform thickness of 5mm, freeze it at -13°C for 3 hours, break the thin slice evenly, and take one of the pieces The section and the glass surface form a gap with a distance of 0.3mm. Water leaks from the upper part of the gap, and the gap stops leaking after 32 minutes, and the waterproof material can be obtained.

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PUM

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Abstract

The invention relates to a method for preparing asphalt base waterproofing material, comprising: using organic reagent nonquaternary cation, performing organic modification onto sodium bentonite, and obtaining a modified bentonite with hydroexpansivity under different organic degree; adding the modified bentonite into building asphalt and finally obtaining the asphalt base waterproofing material having self-healing function. The waterproofing material has good self-healing function upon leakage caused by slight gap, thus can be used as a water proof layer for kitchen, toilet, roof covering or the like of the urban building. Accordingly, the defect of the prior asphalt base waterproofing building material that when the leakage appears, extensive building needs to be repaired, due to no self-healing function, can be solved.

Description

technical field [0001] The invention relates to a preparation method of an asphalt-based waterproof material, in particular to a method for preparing a waterproof material by mixing modified bentonite with asphalt. Background technique [0002] Asphalt is a common and important building waterproof material, which has been widely used as the waterproof layer of kitchens and toilets in urban residential buildings. At present, due to architectural design, construction, use and other reasons, some buildings will leak to varying degrees after being put into use for a period of time. Caused by poor bonding. As for the research on waterproof materials, the main idea of ​​traditional waterproof materials is to improve the performance of waterproof materials so that they can better adapt to complex external conditions and prolong their service life, while ignoring that after leakage, they will still be damaged like other waterproof materials. Building undergoes restoration. In ord...

Claims

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Application Information

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IPC IPC(8): C09K3/18C08L95/00C08K9/04
Inventor 王晓军崔治清郭新峰黎艳
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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