A cement mortar dry mixture for rapid maintenance of cement pavement

Abstract

The invention relates to the technical field of construction, and discloses a cement mortar dry mixture used for quick maintenance of cement pavement. The cement mortar dry mixture consists of 377-435 parts of Portland cement, 547-623 parts of graded river sand, 35-60 parts of stone powder, 27-32 parts of silicon powder, 10.6-12 parts Fly ash, 0.1-2 parts of calcium formate, 0.2-6 parts of triisopropanolamine, 1.1-3 parts of sodium α-olefin sulfonate, 0.6-2 parts of polyvinyl alcohol and 1.4-2.5 parts of anhydrous calcium chloride are mixed Composition, and after it is applied to maintenance methods including milling, slag removal, scrubbing, wetting, pouring cement mortar, paving repair agent and plastic film curing, it can replace cement slurry, only need to mix with appropriate amount of water After mixing, brush or scrape on the 5-7mm between the new and old concrete interfaces. The operation is simple and easy to master. It can effectively increase the interface bonding force, reduce the thickness and dosage of the upper repair material, and effectively ensure the effect of maintenance projects.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a cement mortar dry mixture used for rapid maintenance of cement pavement. Background technique [0002] Cement concrete pavement is the main form of the current pavement. Under the repeated action of increasing traffic load and the cycle of various other environmental and human factors, it will inevitably be damaged to varying degrees. With the cement concrete pavement in service As time goes on, the degree of damage is increasing day by day, mainly manifested as broken boards, cracks, exposed, broken and wrong platforms, etc. In order to ensure the continuous and safe operation of traffic, it is necessary to repair the damaged cement concrete pavement. By comparing relevant industry norms and literature, we know that the strength of repair materials used in cement concrete pavement maintenance engineering must reach 70% of the design strength of the original co...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing cement slurry can only slightly improve the bonding state of the new and old interfaces, and the slurry cannot be applied thickly, which will easily cause shrinkage cracks, and it should not be too thin, which will cause rapid water loss and cause the dry film to lose the interlayer Linking effect, on the contrary, causes separation between layers, and the process method is not easy to master. The purpose of the present invention is to provide a new cement mortar dry mixture for rapid maintenance of cement pavement, which can replace cement paste. After mixing with water, brush or scrape on the 5-7mm between the old and new concrete interface. The operation is simple and easy to master. It can effectively increase the interface bonding force, reduce the thickness and dosage of the upper repairing material, and effectively ensure the effect of the maintenance project.

Images