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Dry mixing waterproof mortar with high crack resistance

A waterproof mortar and high crack resistance technology, which is applied in the field of building materials, can solve problems that affect project quality and normal use, large shrinkage and cracking, and low bond strength, and achieve good compressive strength, improved bonding, and increased toughness. Effect

Active Publication Date: 2017-11-21
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional waterproof mortar has large shrinkage and cracking, low impermeability, low bonding strength, low strength, and poor toughness, which often cause various problems in use, such as shrinkage, cracking, leakage, and easy peeling. Seriously affected the project quality and normal use

Method used

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  • Dry mixing waterproof mortar with high crack resistance

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preparation example Construction

[0021] In this embodiment, the method for preparing the modified loofah fiber includes the following steps:

[0022] (1) Preparation of the solution for modification, including preparation of alkaline mixed solution A and acidic mixed solution B, where:

[0023] The preparation method of the alkaline mixed solution A is as follows: 16.0 parts of NaOH and 1.5 parts of urea are placed in 82.5 parts of deionized water by weight, and the mixture is stirred and dissolved;

[0024] The preparation method of the acidic mixed solution B is: take 30 parts by weight of H 2 SO 4 , 50 parts Na 2 SO 4 And 60 parts of ZnSO 4 Put it in 860 parts of deionized water and stir to dissolve;

[0025] (2) Preparation of modified loofah fiber: After cutting the loofah into small pieces, tear the loofah into a single piece of loofah silk, then put the loofah silk in the alkaline mixed solution A, heat up to 100 ℃, boil for 25 minutes, and then take out the loofah silk Place it in acidic mixed solution B, soa...

Embodiment 1

[0033] According to the high crack resistance dry-mixed waterproof mortar provided in this embodiment, the raw materials of the dry-mixed waterproof mortar include the following components by weight: 410 parts of cement, 1430 parts of machine-made sand, 75 parts of fly ash (600-800 mesh), Acrylic latex powder (0.5-8μm) 2 parts, EVA latex powder (0.5-8μm) 4 parts, styrene butadiene rubber latex 8 parts, modified loofah fiber 120 parts, ramie fiber (monofilament length 9-12mm) 100 parts, bamboo charcoal Fiber (monofilament length is 9-12mm) 55 parts, seaweed powder (600-800 mesh) 90 parts, silicone defoamer 1.0 part, water 350 parts; the fineness modulus of the machine-made sand is 1.8, MB is 1.4. The stone powder content is 10%.

[0034] In this embodiment, the method for preparing dry-mixed waterproof mortar with high crack resistance includes the following steps: uniformly mixing cement, machine-made sand, fly ash, seaweed powder, acrylic latex powder and EVA latex powder by wei...

Embodiment 2

[0041] In the high-crack resistance dry-mixed waterproof mortar provided in this embodiment, the raw materials of the dry-mixed waterproof mortar include the following components by weight: 400 parts of cement, 1450 parts of machine-made sand, 75 parts of fly ash (600-800 mesh), Acrylic latex powder (0.5-8μm) 0.8 parts, EVA latex powder (0.5-8μm) 0.8 parts, styrene butadiene latex 12 parts, modified loofah fiber 120 parts, ramie fiber (monofilament length 9-12mm) 100 parts, bamboo charcoal Fiber (monofilament length is 9-12mm) 50 parts, seaweed powder (600-800 mesh) 100 parts, silicone antifoaming agent 1.0 part, water 350 parts; the fineness modulus of the machine-made sand is 2.2, MB is 1.0, the stone powder content is 7%.

[0042] In this embodiment, the method for preparing the high crack resistance dry-mixed waterproof mortar and the preparation method of the modified loofah fiber are the same as those in the first embodiment, and will not be repeated here.

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Abstract

The invention provides a dry mixing waterproof mortar with high crack resistance. The dry mixing waterproof mortar contains the following raw materials in parts by weight: 400-410 parts of cement, 1400-1450 parts of machine-made sand, 70-75 parts of coal ash, 0.8-4 parts of acrylic based emulsion powder, 0.8-4 parts of EVA emulsion powder, 3-12 parts of styrene-butadiene latex, 100-120 parts of modified towel gourd fiber, 100-120 parts of ramie fiber, 50-60 parts of bamboo charcoal fiber, 70-100 parts of seaweed meal, 0.8-1.0 part of organic silicon defoamer and 280-350 parts of water. According to the invention, all the raw material components are matched with one another and have a synergic effect, so that the prepared mortar has the advantages of high toughness, high rupture strength, high compressive strength and excellent anti-cracking ability and has a certain adsorptive property and a bactericidal ability; the matching relation of all the raw material components is reasonable; all the raw materials can be uniformly mixed; the dry mixing waterproof mortar is harmless to environment and conforms to the idea of low carbon, environmental protection and sustainable development.

Description

Technical field [0001] The invention relates to the technical field of building materials, in particular to a dry-mixed waterproof mortar with high crack resistance. Background technique [0002] With the advancement of the modernization process, the development of the construction industry has entered a brand-new period. As a building material, waterproof mortar is widely used in engineering. However, traditional waterproof mortar has large shrinkage and cracking, low impermeability, low bonding strength, low strength, and poor toughness, resulting in various problems in its use, such as shrinkage, cracking, leakage, and easy peeling. Seriously affected the project quality and normal use. Traditional waterproof mortar is subject to many constraints in engineering applications. [0003] Therefore, in order to improve the physical and mechanical properties of cement mortar and provide its compressive strength, toughness and crack resistance, it is necessary to develop a dry-mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/27
Inventor 吴进良沈港
Owner CHONGQING JIAOTONG UNIVERSITY
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