Cement concrete pavement patching material and cement concrete pavement patching method

A technology for repairing cement concrete and pavement, which is applied in the field of cement concrete pavement repairing materials and cement concrete pavement repairing. It can solve the problems of unsatisfactory repairing effect, low compressive strength, low tensile strength, and low bond strength, and achieve good frost resistance. Improve the destructive ability of melting cycle, improve the interfacial bond strength, and improve the effect of anti-cracking performance

Active Publication Date: 2018-08-28
呼和浩特市政公路工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic repair materials are generally special cement or ordinary Portland cement mixed with early strength agent, which is characterized by high brittleness, high compressive strength but low tensile strength, low bond strength, and poor durability. It is used for cement concrete pavement repair, it is easy to cause secondary damage
Organic repair materials are mainly epoxy resin and polyurethane. Although they have high bonding strength, good corrosion resistance and impermeability, they have poor fatigue resistance and impact resistance, are easy to age, and have high cost. The actual repair effect not ideal

Method used

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  • Cement concrete pavement patching material and cement concrete pavement patching method
  • Cement concrete pavement patching material and cement concrete pavement patching method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The cement concrete pavement repair material of the present embodiment is made up of water and the following components in parts by weight: 48 parts of Portland cement, 22 parts of sulphoaluminate cement, 22 parts of metakaolin, 8 parts of fly ash, alkali-activated 25 parts of agent, 145 parts of fine aggregate, 280 parts of coarse aggregate, 1.5 parts of polycarboxylate superplasticizer, 2.0 parts of polyethylene oxide rubber powder, 1.0 parts of ethylene-vinyl acetate copolymer rubber powder, 2 parts of organic-inorganic composite fiber , Coagulation regulator 0.23 parts; the amount of water used to control the water-binder ratio is 0.35.

[0030] Wherein, the fine aggregate is medium sand with a fineness modulus of 2.6; the coarse aggregate is continuously graded gravel with a particle size of 4-10mm; the organic-inorganic composite fiber is polypropylene fiber and steel fiber The mass ratio is a mixture of 4:1; the length of the polypropylene fiber is 10mm, and the ...

Embodiment 2

[0038] The cement concrete pavement repair material of the present embodiment is made up of water and the following components in parts by weight: 50 parts of Portland cement, 20 parts of sulphoaluminate cement, 20 parts of metakaolin, 10 parts of fly ash, alkali-activated 28 parts of agent, 150 parts of fine aggregate, 275 parts of coarse aggregate, 1.2 parts of polycarboxylate superplasticizer, 2.3 parts of polyethylene oxide rubber powder, 0.9 parts of ethylene-vinyl acetate copolymer rubber powder, and 3 parts of organic-inorganic composite fiber , Coagulation regulator 0.28 parts; the amount of water used to control the water-binder ratio is 0.38.

[0039] Wherein, the fine aggregate is medium sand with a fineness modulus of 2.7; the coarse aggregate is continuously graded gravel with a particle size of 4-10mm; the organic-inorganic composite fiber is polypropylene fiber and steel fiber The mass ratio is a mixture of 4:1; the length of the polypropylene fiber is 15mm, and...

Embodiment 3

[0043] The cement concrete pavement repair material of the present embodiment is made up of water and the following components in parts by weight: 52 parts of Portland cement, 18 parts of sulphoaluminate cement, 18 parts of metakaolin, 12 parts of fly ash, alkali-activated 30 parts of agent, 158 parts of fine aggregate, 270 parts of coarse aggregate, 1.0 part of polycarboxylate superplasticizer, 2.5 parts of polyethylene oxide rubber powder, 0.8 parts of ethylene-vinyl acetate copolymer rubber powder, 4 parts of organic-inorganic composite fiber , 0.31 parts of coagulation regulator; the amount of water used to control the water-binder ratio is 0.36.

[0044] Wherein, the fine aggregate is medium sand with a fineness modulus of 2.8; the coarse aggregate is continuously graded gravel with a particle size of 4-10 mm; the organic-inorganic composite fiber is polypropylene fiber and steel fiber The mass ratio is a mixture of 4:1; the length of the polypropylene fiber is 15mm, and ...

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Abstract

The invention relates to a cement concrete pavement patching material and method. The patching material is prepared from Portland cement, sulphate aluminium cement, metakaolin, fly ash, an alkali-activator, fine aggregates, coarse aggregates, polycarboxylate superplasticizer, polyoxyethylene rubber powder, ethylene-vinyl acetate copolymer rubber powder, organic-inorganic composite fiber and an adjusting admixture; water dosage controls the water-binder ratio to be 0.35-0.4. The patching material has the advantage of the high early strength and the excellent mechanical property and durability; the patching material is adopted for patching cracks and breakages of a cement concrete pavement, the construction technology is simple and rapid, long-time special maintenance is not needed, the work efficiency is high, and the pavement can open to traffic when patching is conducted for 8 h-24 h; the new and old concrete bonding strength is high, by means of long-time repeated freezing and thawing, the phenomenon of recracking or breakage does not exist, the high bonding strength can be maintained, and the service life of the cement concrete pavement is prolonged.

Description

technical field [0001] The invention belongs to the technical field of concrete pavement repair, and in particular relates to a cement concrete pavement repair material, and also relates to a cement concrete pavement repair method using the repair material. Background technique [0002] Cement concrete refers to an engineering composite material that is made of cement, sand, stone, etc. mixed with water. Generally, cement is used as cementitious material, sand and stone are used as aggregate, and water (with or without admixtures and admixtures) ) in a certain proportion, obtained by stirring, molding and oxidation. Cement concrete pavement refers to the pavement with cement concrete as the main material as the surface layer. It is one of the main structural forms of high-grade pavement and is widely used in all levels of highways. Cement concrete pavement has the advantages of high rigidity, strong bearing capacity, long fatigue life, water resistance, high temperature res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06E01C23/09C04B111/20C04B111/34C04B111/72
CPCC04B28/06C04B2111/0075C04B2111/20C04B2111/343C04B2111/72C04B2201/10C04B2201/50E01C23/0906E01C23/098C04B7/02C04B14/106C04B18/08C04B12/04C04B22/062C04B14/06C04B14/02C04B24/281C04B24/26C04B16/0633C04B14/48C04B22/124C04B24/10C04B20/0076C04B20/0048C04B28/04C04B28/065C04B2111/60C04B2111/70Y02W30/91C04B18/22C04B7/323
Inventor 李建州
Owner 呼和浩特市政公路工程有限责任公司
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