Self-leveling waterproof mortar as well as preparation method and application thereof

A waterproof mortar and self-leveling technology, which is applied in the direction of buildings, bridges, bridge parts, etc., can solve the problems of increasing freeze-thaw damage, unstable piers and abutments, and affecting driving safety, so as to reduce evaporation loss, improve waterproof performance, and avoid surface damage. crack effect

Active Publication Date: 2019-01-18
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only affects the safety of driving, but also does not have a waterproof effect on the substructure, resulting in water leakage in the bridge, corrosion and loosening of the piers and abutments, and instability of the piers and abutments.
The possible reasons for the analysis are as follows: (1) After the construction of the concrete protective layer, there is no maintenance in place, causing microcracks during the initial curi

Method used

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  • Self-leveling waterproof mortar as well as preparation method and application thereof
  • Self-leveling waterproof mortar as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: A self-leveling waterproof mortar

[0048] The raw material composition of the self-leveling waterproof mortar described in this example is shown in Table 1; it was prepared by the following method:

[0049] A. Add the polymer emulsion, water, defoamer, water reducer, water-based epoxy resin emulsion, curing agent in the mixer in sequence and stir and mix evenly, the stirring speed is 20 ~ 40rpm;

[0050] B. Add the sand in the mass parts and stir and mix evenly, the stirring speed is 60~80rpm;

[0051] C. Then add the cement, mineral admixture, mineral filler, stabilizer in said mass parts in turn and stir and mix evenly, the stirring speed is 100~140rpm;

[0052] D. Stir again at a stirring speed of 100-140rpm for 3-5 minutes, then adjust the stirring speed to 20-40rpm and continue stirring for 1 minute.

Embodiment 2

[0053] Example 2: A self-leveling waterproof mortar

[0054] The raw material composition of the self-leveling waterproof mortar described in this example is shown in Table 1; it was prepared by the following method:

[0055] A. mix the cement, sand, mineral admixture, mineral filler and stabilizer of the mass parts to obtain dry powder;

[0056] B. Add the polymer emulsion, water, defoamer, water reducing agent, water-based epoxy resin emulsion, and curing agent in the mass parts into the mortar mixer in sequence, and stir at a slow speed, and the stirring speed is 20-40rpm;

[0057] C. Add the dry material prepared in step A', stir rapidly for 3-5 minutes at a stirring speed of 100-140 rpm, then adjust the stirring speed to 20-40 rpm and continue stirring for 1 minute to obtain the product.

Embodiment 3

[0058] Example 3: A self-leveling waterproof mortar

[0059] The raw material composition of the self-leveling waterproof mortar described in this example is shown in Table 1; the self-leveling waterproof mortar described in this example was prepared according to the same method and steps as in Example 1.

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Abstract

The invention provides self-leveling waterproof mortar. The self-leveling waterproof mortar has the characteristics of high mobility, compact structure, water resistance, excellent durability and thelike. The self-leveling waterproof mortar is prepared from the following components in parts by mass: 20 to 30 parts of cement, 2 to 10 parts of a mineral admixture, 40 to 60 parts of sand, 5 to 15 parts of mineral filler, 0.05 to 0.3 part of a water reduction agent, 0.002 to 0.015 part of a defoaming agent, 0.002 to 0.06 part of a stabilizer, 1 to 5 parts of polymer emulsion, 0.1 to 0.3 part of waterborne epoxy resin emulsion, 0.1 to 0.3 part of a curing agent, and 4 to 10 parts of water. The invention also provides a preparation method of the self-leveling waterproof mortar and application thereof in an inter-line waterproof system of a railway concrete bridge deck.

Description

technical field [0001] The invention relates to the technical field of waterproof building materials, in particular to a self-leveling waterproof mortar with high fluidity, compact structure, waterproof and excellent durability, and a preparation method and application thereof. Background technique [0002] The deck waterproofing system of railway concrete bridges is an important technical means to improve the durability of bridge structures. If the existing bridge deck fails due to deck waterproofing, it will cause water seepage and corrosion of steel bars on the bridge deck, which will directly affect the service life of the bridge and the driving safety of the train. [0003] The line-to-line waterproof system of my country's railway concrete bridge deck (that is, the waterproof system between the up and down rails on the bridge deck) adopts a waterproof membrane layer firstly, and then pours a certain thickness (about 10cm) of concrete as a protective layer. At present,...

Claims

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Application Information

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IPC IPC(8): C04B28/06E01D19/08E01D101/24
CPCC04B28/06C04B2111/20C04B2111/76C04B2201/50E01D19/083E01D2101/24C04B7/02C04B18/08C04B18/12C04B18/146C04B14/06C04B14/28C04B14/30C04B24/42C04B24/383C04B24/26C04B24/281C04B2103/302C04B2103/0068
Inventor 贾恒琼王涛祝和权杜存山李海燕魏曌吴韶亮杜玮南阳张喆
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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