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Acrylic ester emulsion modified cement base rapid repair mortar

A technology of acrylate and repair mortar, applied in the field of building materials, can solve the problems of poor compatibility of cement substrates, low bond strength, large shrinkage, etc., achieve good crack resistance, high early strength, and improve flexibility sexual effect

Active Publication Date: 2011-10-12
JIANGSU XINGSHA CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, inorganic repair materials have the advantages of high strength, good compatibility, and easy construction, but there are problems such as low bond strength, large shrinkage rate, and easy to fall off; organic repair materials use various polymers as cementing materials, and have the advantages of bonding High strength, short curing time, good durability and other outstanding advantages, but poor compatibility with cement substrates and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, a kind of acrylate emulsion modified cement-based rapid repair mortar, according to sulfoaluminate cement 100, desulfurization gypsum 2, 0.50mm-2.0mm quartz sand 50, less than 0.50mm quartz sand 100, acrylate emulsion 10, Water reducer 0, polypropylene fiber 1.0, calcium formate 1, defoamer 0 and water 60 weight ratio prepared and stirred evenly. The fluidity of this rapid repair mortar is 260mm, the 1-day flexural strength is 4.5MPa, and the 1-day compressive strength is 23.6 MPa; The 7-day flexural strength is 9.5MPa, and the 7-day compressive strength is 35.6 MPa; The tensile bond strength is 0.76 MPa, and the 7d expansion rate is 0.02%.

Embodiment 2

[0042] Embodiment 2, a kind of acrylate emulsion modified cement-based rapid repair mortar, according to 100 of sulphoaluminate cement, 10 of desulfurized gypsum, 220 of 0.50mm-2.0mm quartz sand, 10 of less than 0.50mm quartz sand, 80 of acrylate emulsion, Water reducer 0.1, polypropylene fiber 2.0, calcium formate 3, defoamer 0.2 and water 0 weight ratio prepared and stirred evenly. The fluidity of this repair mortar is 220mm, the 1-day flexural strength is 5.8MPa, and the 1-day compressive strength is 27.5 MPa; The 7-day flexural strength is 12.3MPa, and the 7-day compressive strength is 41.6 MPa; The bonding strength is 1.68MPa, and the 7d expansion rate is 0.04%.

Embodiment 3

[0043] Embodiment 3, a kind of acrylate emulsion modified cement-based rapid repair mortar, according to sulfoaluminate cement 100, desulfurization gypsum 5, 0.50mm-2.0mm quartz sand 120, less than 0.50mm quartz sand 80, acrylate emulsion 20, Water reducer 0.2, polypropylene fiber 0.5, calcium formate 10, defoamer 1.2 and water 40 weight ratio prepared and stirred evenly. The fluidity of this repair mortar is 180mm, the 1-day flexural strength is 6.7MPa, and the 1-day compressive strength is 32.8 MPa; The 7-day flexural strength is 13.2MPa, and the 7-day compressive strength is 45.6 MPa; The bonding strength is 1.82MPa, and the 7d expansion rate is 0.03%.

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Abstract

The invention belongs to the technical field of building materials, in particular relates to acrylic ester emulsion modified cement base rapid repair mortar. The mortar consists of sulphoaluminate cement, desulfurated gypsum, quartz sand, an acrylate emulsion, a water reducer, polypropylene fiber, calcium formate, a defoamer and water. The problems that the traditional inorganic repair mortar is low in adhesion strength, is large in shrinkage, is easy to fall out, and the like are solved through using the mortar provided in the invention, thereby overcoming the defects that the compatibility of organic repair material and cement base material is poor, cost is high, and the like. By using the mortar in the invention, the problems of slow setting time, low early strength and large shrinkage of polymer modified cement base repair mortar are solved. The mortar in the invention has the advantages of high early strength, especially high breaking strength, stable later strength development and good flexibility and crack resistance, and is suitable for rapid repair of various cement base materials.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an acrylate emulsion modified cement-based rapid repair mortar. Background technique [0002] Concrete is the most widely used building structure material today. Due to reasons such as unreasonable concrete structure design, construction defects, environmental erosion, improper maintenance and its own aging, concrete will inevitably crack and be damaged in engineering applications. Concrete cracking and damage will seriously affect the normal use of concrete structures, if not repaired, it will bring great safety hazards and economic losses. [0003] The existing repair materials include traditional inorganic repair materials such as ordinary portland cement repair mortar, polymer repair materials and polymer modified repair materials. Among them, inorganic repair materials have the advantages of high strength, good compatibility, and easy construction, bu...

Claims

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Application Information

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IPC IPC(8): C04B28/36
CPCC04B28/06
Inventor 孙振平叶丹玫庞敏
Owner JIANGSU XINGSHA CONSTR ENG GRP
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