Thin-layer pavement patching mortar

Abstract

The invention discloses thin-layer pavement patching mortar which is composed of a basic material and an accessory material, wherein the basic material comprises cement and quartz sand, and the accessory material comprises a water retention agent, rubber powder, a water reducing agent, a defoamer, fibers, a flocculant, coarse whiting powder and water. The thin-layer pavement patching mortar disclosed by the invention has the beneficial effects that the thin-layer pavement patching mortar provided by the invention can meet the strength needed for pavement traffic, and can be combined with pavement materials well, especially in harsh environments such as expansion caused by wet and contraction caused by dry, expansion caused by heat and contraction caused by cold, freezing and thawing cycle, and the like, and the mortar can overcome a tensile stress between the mortar and concrete due to unsynchronized construction, thereby meeting the requirements on the long-term protection of concrete pavements; the patching mortar provided by the invention has the characteristics of high early strength and stable long-term strength development, and is good in flexibility, impact resistance and abrasion resistance; in addition, the mortar has good liquidity and water retention, and can satisfy the demands of different engineering constructions, therefore, the mortar can be widely applied to the patching of concrete pavements in the fields of municipal engineering, pavements, airports, and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a thin-layer road surface repair mortar. Background technique [0002] With the continuous development of science and technology, concrete is the largest building structure material used today. Due to reasons such as unreasonable concrete structure design, construction defects, environmental erosion, improper maintenance and its own aging, concrete will inevitably crack in engineering applications. And damage, the cracking and damage of concrete will seriously affect the normal use of the concrete structure, if it is not repaired in time, it will bring great safety hazards and economic losses. [0003] Concrete refers to the pavement with cement concrete slab as the surface layer. It refers to the pavement structure composed of cement concrete slab as the surface layer, base layer and cushion layer, also known as rigid pavement. The materials used for cement concrete ...

AI Technical Summary

Problems solved by technology

[0007] The invention adds water-retaining agent and water-reducing agent, effectively adjusts the viscosity of the repair mortar, and overcomes the defects in the prior art such as high viscosity strength, poor construction effect, low bonding strength, long setting time, and poor bending resistance, etc. Improve the construction efficiency and enhance the aesthetics of the road surface after construction; in addition, the addition of defoamer enhances the durability of the repair mortar and prolongs the service life. The rubber powder used is acrylic rubber powder, and acrylic acid forms a three-dimensional network in the mortar film, which endows the mortar with the characteristics of flexibility, wear resistance, and impact resistance; at the same time, combined with the characteristics of high pressure resistance and high durability of cement, it becomes an ideal road surface repair material, mainly suitable for repairing damaged, peeling, and salt-eroded roads. After the pavement is repaired, it has strong impact resistance and heavy pressure resistance. In addition, the added flocculant can make the mortar coagulate quickly during construction, and the coagulation effect is obvious, which shortens the construction period and has strong practicability in actual use.