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Fiber restricted expansion mortar as well as dry mixture, wet mixture and preparation method of fiber restricted expansion mortar

A technology of limited expansion and mixing agent, which is applied in the field of wet mixture, preparation, fiber-type limited expansion mortar and its dry mixture, which can solve the problems of poor limited expansion performance and achieve high ultimate elongation and high tensile strength , the effect of rapid development of early strength

Inactive Publication Date: 2018-06-15
河南中建西部建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of fiber-type limited expansion mortar for repairing cracks in concrete products, to solve the problem of poor expansion limited performance of the current repair mortar; Dry mix and wet mix of fiber-type limited expansion mortar for product cracks and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of embodiment 1 of the fiber type limited expansion mortar that is used to repair concrete product crack of the present invention: comprise dry mix and wet mix, the dry mix described in this repair mortar is by anionic surfactant type foaming agent 0.2 part , 4 parts of CSA expansion agent, 1 part of plastic stabilizer, 0.4 parts of polypropylene chopped fiber, 32 parts of early strength sulfoaluminate cement, 5 parts of fly ash, and 40 parts of aggregate for configuration. The wet mixture is prepared by adding 1.1 parts of water reducing agent, 0.2 parts of viscosity adjusting agent, 0.1 part of water retaining agent, and 15 parts of deionized water. When using, unseal the dry mixture cartridge and the wet mixture cartridge, mix and stir for 5 minutes according to the ratio of 1:1, and then finish. The initial setting time of the product of the present invention is 10 minutes, the final setting time is 29 minutes, the strength reaches 22.5MPa in 1 day, the stren...

Embodiment 2

[0032] A kind of embodiment 2 of the fiber-type limited expansion mortar used for repairing cracks in concrete products of the present invention, the difference between this embodiment and embodiment 1 is only that the dry mixture described in the repair mortar foams according to the anionic surfactant type 0.2 parts of agent, 3 parts of CSA expansion agent, 1.9 parts of plastic stabilizer, 0.2 parts of polypropylene chopped fiber, 32 parts of early strength sulfoaluminate cement, 10 parts of fly ash, and 36 parts of aggregate. The wet mixture is prepared by adding 1.4 parts of water reducing agent, 0.2 part of viscosity adjusting agent, 0.1 part of water retaining agent, and 15 parts of deionized water. Unpack the dry mix cartridge and the wet mix cartridge, mix and stir for 5 minutes at a ratio of 1:1, and finish. The initial setting time of the product of the present invention is 8 minutes, the final setting time is 25 minutes, the strength reaches 24.1MPa in 1 day, 34.7MPa...

Embodiment 3

[0033] A kind of embodiment 3 of the fiber-type limited expansion mortar used for repairing cracks in concrete products of the present invention, the difference between this embodiment and embodiment 1 is only: the dry mixture described in the repair mortar foams according to the anionic surfactant type 0.1 parts of agent, 3 parts of CSA expansion agent, 2.6 parts of plastic stabilizer, 0.3 parts of polypropylene chopped fiber, 37 parts of early strength sulfoaluminate cement, 5 parts of fly ash, and 33 parts of aggregate. The wet mixture is prepared by adding 1.5 parts of water reducing agent, 0.4 parts of viscosity adjusting agent, 0.1 part of water retaining agent, and 17 parts of deionized water. Unpack the dry mix cartridge and the wet mix cartridge, mix and stir for 5 minutes at a ratio of 1:1, and finish. The initial setting time of the product of the present invention is 13 minutes, the final setting time is 36 minutes, the strength reaches 24.4MPa in 1 day, 35.3MPa in...

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Abstract

The invention relates to the field of building materials and in particular relates to a fiber restricted expansion mortar as well as a dry mixture, wet mixture and preparation method of the fiber restricted expansion mortar. Due to the addition of a foaming agent, a CSA expanding agent, a stabilizer and polypropylene chopped fibers, mortar is subjected to a whole string of reaction processes including foaming, flowing, bubble breakage, concrete contraction, restricted expansion of an expanding agent, plasticity change caused by plasticity stability neutralizing fibers and the foaming agent andmechanical property improvement by the polypropylene chopped fibers to finally form repair mortar with high early strength development speed, volume restricted expansion, high tensile strength, highultimate tensile rate and high toughness. Due to the addition of the fibers, the tensile and crack resistance of the repair mortar are greatly improved; due to the addition of the expanding agent, themortar generates a restricted expansion effect so as to be more densely filled, the performances such as fracture resistance, tensile strength and durability of the hardened repair mortar are more excellent than those of other repairing agents, and the problem of poor restricted expansion property of the current repair mortar is solved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to fiber-type limited expansion mortar and its dry mixture, wet mixture and preparation method. Background technique [0002] Cement mortar is a special cement concrete, and its performance follows the law of cement concrete performance change. Since its birth, although concrete has only a history of more than one hundred years, it has been widely used in many fields such as construction, transportation, water conservancy, and ports. In the five years from 1985 to 1989, there were 588 house collapse accidents. Repair costs could run into the hundreds of billions of dollars. In the world, the phenomenon of aging and disease of existing concrete structures has become very common, which has led to the rapid development of a new special engineering industry - the maintenance and reinforcement of concrete structures, and the corresponding maintenance and reinforcement costs have also i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B24/20C04B22/148C04B14/28C04B22/143C04B24/383C04B22/00C04B24/18C04B16/0633C04B18/08C04B14/06C04B2103/302C04B2103/44
Inventor 魏忠张新胜吴跃辉李多元贾亚琼马义乐马世豪宋姗
Owner 河南中建西部建设有限公司
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