High crack resistance dry mix waterproof mortar

A waterproof mortar, high crack resistance technology, applied in the field of building materials, can solve the problems affecting project quality and normal use, low bonding strength, large shrinkage cracking, etc., to achieve good compressive strength, improve toughness, and improve bonding Effect

Active Publication Date: 2019-10-01
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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  • High crack resistance dry mix waterproof mortar

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preparation example Construction

[0021] In the present embodiment, the preparation method of described modified loofah fiber comprises the steps:

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

[0023] The preparation method of the alkaline mixed solution A is: take 16.0 parts of NaOH and 1.5 parts of urea in parts by weight, place them in 82.5 parts of deionized water, stir and dissolve;

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

[0025] (2) Preparation of modified loofah fiber: After cutting the loofah into small pieces, tear it into individual loofah shreds, then place the loofah shreds in alkaline mixed solution A, heat up to 100°C, boil for 25 minutes, and then take out the loofah shreds Place in the acidic mixed solution B, soak fo...

Embodiment 1

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

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

Embodiment 2

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

[0042] In this example, the method for preparing dry-mixed waterproof mortar with high crack resistance and the method for preparing the modified loofah fiber are the same as those in Example 1, 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 advance of the modernization process, the development of the construction industry has entered a new period. As a building material, waterproof mortar is widely used in engineering. 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. 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 high cra...

Claims

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Application Information

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