A cement-based rapid repair material with high early strength and its preparation method

Abstract

A high-early-strength cement-based rapid repair material is made of raw materials including the following components by mass: 500-650 parts for sulphoaluminate cement, 200-400 parts for ordinary Portland cement, and 800 parts for quartz sand ~900 parts, 4.5~9.0 parts of nano-silica, 0.25~0.6 parts of dispersant, 1.1~10.8 parts of water reducer, 0.045~0.160 parts of retarder, 0.10~0.25 parts of defoamer, 315~360 parts of water . The invention also provides a preparation method of the cement-based quick repair material with improved early strength. It is convenient and easy to prepare on site. It is compounded with sulphoaluminate cement and Portland cement to ensure the early and late strength. Nanomaterials can significantly improve the microstructure of the composite repair system and significantly improve the early mechanical properties of cement-based materials; The driving quality and driving safety of the repaired road surface; the repairing cost is low and the practicability is strong.

Description

technical field

[0001] The invention belongs to the technical field of application of cement-based materials, and in particular relates to a high-early-strength cement-based rapid repair material, and also relates to a preparation method of a high-early-strength cement-based rapid repair material. Background technique

[0002] In recent years, with the rapid development of my country's economy and the advancement of urbanization, the transportation network has become more and more developed, resulting in the construction of a large number of road projects in our country. However, due to the rapid growth of traffic volume, the damage of traffic facilities such as roads, bridges and tunnels has become increasingly serious, which has a great impact on driving quality and driving safety. Local damage such as potholes is a common disease on the pavement. If these defects are not repaired in time, the disease will continue to develop and cause more serious results, bringing a lot...