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High-strength concrete composite material and preparation method thereof

A composite material and concrete technology, applied in the field of construction engineering materials, can solve the problems of concrete cracking, large drying shrinkage of the matrix, and large crack width, etc., and achieve the effects of avoiding temperature cracks, improving interaction, and improving main indicators.

Inactive Publication Date: 2014-01-29
ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term use and weathering will cause concrete cracks, the crack width is large, and harmful substances (chloride ions, sulfate ions, etc.) can quickly invade, and it is more susceptible to erosion in coastal areas, which seriously affects the safety and long-term durability of concrete structures. sex
Experiments have proved that ordinary mortar is not effective as a repair material, and its bonding force with concrete is poor. After a period of repair, cracking and other phenomena will occur
Although the concrete composite material enhances the material performance and improves the cohesion, the reduction of the aggregate particle size will cause the matrix to shrink greatly, and the increase in early shrinkage is also the main cause of early cracks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength concrete composite material, comprising the following components by weight: 100 parts of cement; 1 part of fiber; 2 parts of silica fume; 1 part of fly ash; 1 part of composite rare earth; 10 parts of magnesium silicate particles; 140 parts of sand ; 140 parts of gravel; 30 parts of water; the cement is a mixture of one or both of ordinary Portland cement and sulphoaluminate cement; the fiber is polyvinyl alcohol fiber, polypropylene fiber, polyester fiber and one or more of steel fibers; the fiber length is 4mm, the diameter is 12 μm, and the elastic modulus is 2500MPa; the fly ash is high-calcium ash or common ash; the particle size of the magnesium silicate particles The sand is medium-fine sand with a particle size of 150 μm; the gravel is obtained from unweathered granite after crushing, screening and washing, with a continuous gradation of 40.5 mm and a mud content of less than 1%.

Embodiment 2

[0033] A high-strength concrete composite material, including the following components by weight: 100 parts of cement;

[0034] 5 parts of fiber; 20 parts of silica fume; 20 parts of fly ash; 10 parts of composite rare earth; 200 parts of magnesium silicate particles; 200 parts of sand; 200 parts of gravel; 50 parts of water; One or two mixtures of sulfoaluminate cement; the fiber is one or more of polyvinyl alcohol fiber, polypropylene fiber, polyester fiber and steel fiber; the fiber length is 18mm, and the diameter is 38 μm, modulus of elasticity is 30GPa; the fly ash is high calcium ash or common ash; the particle size of the magnesium silicate particles is 15mm; the sand is medium fine sand, the particle size is 3000 μm; the crushed stone is Unweathered granite is obtained through crushing, screening and washing, with a continuous gradation of 20.5mm and a mud content of less than 1%.

Embodiment 3

[0036] A high-strength concrete composite material, including the following components by weight: 100 parts of cement;

[0037] 3 parts of fiber; 8 parts of silica fume; 10 parts of fly ash; 5 parts of composite rare earth; 150 parts of magnesium silicate particles; 180 parts of sand; 180 parts of gravel; 45 parts of water; One or two mixtures of sulfoaluminate cement; the fiber is one or more of polyvinyl alcohol fiber, polypropylene fiber, polyester fiber and steel fiber; the fiber length is 9mm, and the diameter is 25 μm, modulus of elasticity is 20GPa; the fly ash is high calcium ash or common ash; the particle size of the magnesium silicate particles is 13mm; the sand is medium fine sand, the particle size is 2000 μm; the crushed stone is Unweathered granite is obtained by crushing, screening and washing, 1mm continuous gradation, mud content less than 1%.

[0038] According to the preparation method of above-mentioned high-strength concrete composite material, comprise ...

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PUM

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Abstract

The invention discloses a high-strength concrete composite material which comprises the following components in parts by weight: 100 parts of cement, 1-5 parts of fiber, 2-20 parts of silica fume, 1-20 parts of coal ash, 1-10 parts of composite rare earth, 10-20 parts of magnesium silicate granules, 140-200 parts of sand, 140-200 parts of macadam and 30-50 parts of water. The product is high in anti-cracking ability and small in loaded crack width and has long-term durability. Moreover, the interaction of composite concrete is improved, the material performance is far higher than basic performance of common concrete, main indexes of the concrete are obviously improved, a temperature crack is avoided, and the strength, freezing resistance and anti-permeability of the concrete are guaranteed.

Description

technical field [0001] The invention relates to the technical field of building engineering materials, in particular to a high-strength concrete composite material and a preparation method thereof. Background technique [0002] Concrete has been used as a building material for more than 100 years. The advantages of concrete are high compressive strength, easy to obtain materials, easy to shape and low price, and can be combined with other materials to make various heavy fixtures. However, the Achilles heel of concrete is tensile strength. Low strength, easy to crack, thereby reducing the bearing capacity of the concrete structure and shortening the service life, becoming a hidden danger of various disasters and accidents. [0003] Concrete is widely used in construction facilities due to its good performance and low price. However, long-term use and weathering will cause concrete cracks, the crack width is large, and harmful substances (chloride ions, sulfate ions, etc.) ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06
Inventor 徐文龙陆维平赵霞苏健金和平李文龙
Owner ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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