Road micro-expanding and slow-setting cement

Abstract

The invention discloses road micro-expanding and slow-setting cement, which relates to the technical field of cement manufacturing and aims to solve the technical problems of uneven section of water stable layer, loose internal structure, easy cracking, easy expansion and the like of a road using common portland cement. The road micro-expanding and slow-setting cement of the invention comprises the following components in percentage by weight: 35 percent of rotary kiln clinker, 10 percent of dihydrate gypsum and 55 percent of yellow phosphorus slag. The road micro-expanding and slow-setting cement is suitable for severe cold areas.

Description

technical field [0001] The invention relates to the field of cement production, in particular to a micro-expansion retarded cement suitable for alpine regions. Background technique [0002] At present, most of the cement used in the road water stability level is low-grade, low-grade general-purpose Portland cement, and its initial setting time is relatively short, usually about two hours. Due to the long construction time of the road and the need for mechanical rolling for a long time, it is necessary to add a retarder when using ordinary cement to prolong the hydration time of the cement to improve the relevant technical parameters of ordinary cement products, but usually there are still the following problems: [0003] 1. Unreasonable distribution of cement particles; [0004] 2. During the hydration process of cement, the hydration is slow and the strength is not easy to exert; [0005] 3. Porosity is created during the hydration process. [0006] Due to the existence ...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve technical problems such as uneven cross-section of the road water-stabilizing layer, loose internal structure, prone to cracks, and prone to expansion due to the use of general-purpose Portland cement, so as to provide a road water-stabilizing layer section that can be flat and internally Road micro-expansion retarded cement with compact structure, extremely low expansion coefficient, and greatly prolonging the service life of roads