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High-strength high-durability modified concrete structure repairing material

A technology for concrete structures and repair materials, which is applied in the field of high-strength and high-durability modified concrete structure repair materials, can solve problems such as application limitations of latex-modified concrete and inability to meet requirements in strength, and achieves low cost, convenient construction, and chemical resistance. The effect of medium corrosion

Inactive Publication Date: 2016-11-09
夏学云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this kind of latex modified concrete is used as a building structure material and structural reinforcement material, its strength often cannot meet the requirements, so that the application of latex modified concrete is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The mass percentages of the components of the modified concrete structure repair materials prepared in this experiment are: cement: ordinary portland cement 10.5%; sand: medium coarse sand 7%; coarse aggregate: 5-20mm crushed stone 25%; Corrective agent: MA type cement modifier 16%; silica fume 5%; water 36.5%.

[0036]Ordinary concrete specimen 28d compressive strength 33.6MPa, splitting tensile strength 3.02MPa; modifier dosage 18%, silica fume 0%, the prepared concrete specimen 28d compressive strength 21.7MPa, splitting tensile strength 2.28MPa , the compressive strength and splitting tensile strength of the modified concrete specimens were 64% and 75% of the ordinary concrete specimen group, indicating that the incorporation of MA modifier will reduce the early strength of concrete. In this experiment, 16% of MA-type cement modifier and 5% of silica fume were added. The 28d compressive strength of the prepared modified concrete specimen was 21.9MPa, and the splitti...

Embodiment 2

[0038] The mass percentages of the components of the modified concrete structure repair materials prepared in this experiment are: cement: ordinary Portland cement 10.5%; sand: medium coarse sand 7%; coarse aggregate: 5-20mm crushed stone 25%; Corrective agent: MA type cement modifier 18%; silica fume 6%; water 36.5%.

[0039] Ordinary concrete specimen 28d compressive strength 33.6MPa, splitting tensile strength 3.02MPa; modifier dosage 18%, silica fume 0%, the prepared concrete specimen 28d compressive strength 21.7MPa, splitting tensile strength 2.28MPa , the compressive strength and splitting tensile strength of the modified concrete specimens were 64% and 75% of the ordinary concrete specimen group, indicating that the incorporation of MA modifier will reduce the early strength of concrete. In this experiment, 18% of modifier and 6% of silica fume were added, and the modified concrete specimen 28d had a compressive strength of 23.8MPa and a splitting tensile strength of 2...

Embodiment 3

[0042] The mass percentages of the components of the modified concrete structure repair materials prepared in this experiment are: cement: ordinary Portland cement 10.5%; sand: medium coarse sand 7%; coarse aggregate: 5-20mm crushed stone 25%; Corrective agent: MA type cement modifier 20%; silica fume 7%; water 36.5%.

[0043] Ordinary concrete specimen 28d compressive strength 33.6MPa, splitting tensile strength 3.02MPa; modifier dosage 18%, silica fume 0%, the prepared concrete specimen 28d compressive strength 21.7MPa, splitting tensile strength 2.28MPa , the compressive strength and splitting tensile strength of the modified concrete specimens were 64% and 75% of the ordinary concrete specimen group, indicating that the incorporation of MA modifier will reduce the early strength of concrete. In this experiment, 16% of modifier and 5% of silica fume were added, and the modified concrete specimen 28d had a compressive strength of 22.4MPa and a splitting tensile strength of 2...

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Abstract

The invention discloses a high-strength high-durability modified concrete structure repairing material. The repairing material is prepared from, by mass, 10-11% of cement, 6-7% of sand, 21-38% of coarse aggregate, 16-20% of modifier, 5-7% of silica fume and 34-38% of water. By adding the modifier and silica fume, the strength and durability of concrete are improved. Compared with traditional concrete materials, the repairing material has the advantages that working performance is high, strength is high, interface bonding performance is high, price is low, durability is high, and the repairing material can be widely applied to repair work of water conservancy projects and various industrial and civil buildings.

Description

technical field [0001] The invention relates to the field of concrete structure repair materials, in particular to a high-strength and high-durability modified concrete structure repair material. Background technique [0002] From the advent of concrete around 1830 to the beginning of this century, concrete has been widely used in bridges, houses, dams, highways and other buildings and structures, and has become one of the most widely used building materials. In actual engineering, due to improper design or construction, and harsh working environment, concrete will gradually age and be damaged, especially for buildings and structures in industrial erosion environments, and their service life is far lower than the design age. If it is not strengthened in time, its structural performance will be significantly degraded, which may cause structural damage. Because repairing the structure can effectively improve the structural performance, prolong the service life of the building...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/72
CPCC04B28/04C04B2111/72C04B2201/50C04B14/06C04B14/02C04B2103/0068C04B18/146
Inventor 不公告发明人
Owner 夏学云
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