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Organic modified cement based patch mortar

A repairing mortar and cement-based technology, applied in the field of new building materials, can solve the problems affecting the performance of cement-based materials, poor chemical corrosion resistance, low tensile strength, etc., to achieve good reactivity, short construction period, and stable strength growth. Effect

Inactive Publication Date: 2016-05-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when traditional cement materials are used, they have inherent defects such as low tensile strength, low toughness, large shrinkage, and poor chemical corrosion resistance, which affect the performance of cement-based materials.
The existing polymer-based repair materials have poor compatibility with cement substrates and high cost. In the actual construction process, there are still poor construction effects, low bonding strength, long setting time, poor durability, and easy to fall off. Practicality Poor, thus limiting the production and application of cement-based repair mortar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An organically modified cement-based repair mortar is composed of the following raw materials in parts by mass: 200 parts of rapid-hardening sulphoaluminate cement, 20 parts of Portland cement, 20 parts of limestone powder, 5 parts of ultrafine mineral powder, 400 parts 1 part of nano-attapulgite, 2 parts of magnesium oxide expansion agent, 150 parts of cationic emulsified asphalt, 0.06 part of fatty acid polyether derivative, 0.6 part of polycarboxylate superplasticizer, 200 parts of limestone machine-made sand, 150 parts of water.

[0026] Said cationic emulsified asphalt is a styrene-butadiene copolymer modified cationic emulsified asphalt with a solid content of 40-45% and a viscosity of 50mPa·s.

[0027] As mentioned, the particle size of limestone powder is 75 μm.

[0028] As mentioned, the particle size of the ultrafine mineral powder is 10 μm.

[0029] Said nano-attapulgite particle size is 30nm.

[0030] Experimental determination shows that the properties of...

Embodiment 2

[0032] An organically modified cement-based repair mortar, which is composed of the following raw materials in parts by mass: 150 parts of rapid-hardening sulphoaluminate cement, 35 parts of Portland cement, 35 parts of limestone powder, 15 parts of ultrafine mineral powder, 230 parts Nano-attapulgite, 4 parts of magnesium oxide expansion agent, 110 parts of cationic emulsified asphalt, 0.08 parts of fatty acid polyether derivatives, 1.3 parts of polycarboxylate superplasticizer, 400 parts of limestone machine-made sand, 130 parts of water.

[0033] Said cationic emulsified asphalt is a styrene-butadiene copolymer modified cationic emulsified asphalt with a solid content of 40-45% and a viscosity of 150mPa·s.

[0034] As mentioned, the particle size of limestone powder is 50 μm.

[0035] As mentioned, the particle size of the ultrafine mineral powder is 5 μm.

[0036] Said nano-attapulgite particle size is 300nm.

[0037] Experimental determination shows that the properties ...

Embodiment 3

[0039] An organically modified cement-based repair mortar is composed of the following raw materials in parts by mass: 100 parts of rapid-hardening sulphoaluminate cement, 50 parts of Portland cement, 50 parts of limestone powder, 30 parts of ultrafine mineral powder, 150 parts 1 part of nano-attapulgite, 5 parts of magnesium oxide expansion agent, 70 parts of cationic emulsified asphalt, 0.1 part of fatty acid polyether derivative, 2 parts of polycarboxylate water reducer, 600 parts of limestone machine-made sand, 100 parts of water.

[0040] Said cationic emulsified asphalt is butadiene-styrene copolymer modified cationic emulsified asphalt with a solid content of 40-45% and a viscosity of 300mPa·s.

[0041] As mentioned, the particle size of limestone powder is 20 μm.

[0042] As mentioned, the particle size of the ultrafine mineral powder is 0.4 μm.

[0043] Said nano-attapulgite particle size is 500nm.

[0044] Experimental determination shows that the properties of the...

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PUM

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Abstract

The invention discloses organic modified cement based patch mortar. The organic modified cement based patch mortar is prepared from the following raw materials in parts by mass: 100-200 parts of rapid-hardened sulfo-aluminate cement, 20-50 parts of silicate cement, 20-50 parts of limestone flour, 5-30 parts of ultrafine mineral powder, 150-400 parts of nano attapulgite, 2-5 parts of expansion agent, 70-150 parts of cationic emulsified asphalt, 0.06-0.1 part of antifoamer, 0.6-2 parts of water reducing agent, 200-600 parts of sand and 100-150 parts of water. The patch mortar disclosed by the invention is high in mechanical properties, good in impermeability and low in whole mortar shrinkage and has good compatibility with a cement matrix, the raw materials are cheap and readily-available, and the cost is relatively low, so that the patch mortar is suitable for being popularized in large scale.

Description

technical field [0001] The invention relates to the field of new building materials, in particular to an organically modified cement-based repair mortar. Background technique [0002] With the rapid development of the national economy, people's demand for buildings is also constantly developing. Many existing buildings can no longer meet the requirements of modern life, whether in terms of appearance or function, and are in urgent need of reinforcement and renovation. During the long-term use of cement-based buildings, they are affected by factors such as heavy loads, freeze-thaw cycles, penetration of chloride ions, surface abrasion, and erosion of corrosive media. Many buildings have cracked, peeled, and hollowed out. , which greatly affects the service life of the project. [0003] At present, there are two types of repair materials in the market: inorganic and organic. Cement-based repair mortar is the most commonly used material for concrete structure repair or reinfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2103/302C04B2103/50C04B2111/72C04B7/02C04B14/28C04B18/12C04B14/10C04B24/36C04B24/32C04B24/24C04B22/066
Inventor 宫晨琛孙科科芦令超王守德赵丕琪
Owner UNIV OF JINAN
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