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

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...

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