A weathered clear water brick repair material

Abstract

A repairing material for weathered clear water bricks, the raw materials are as follows in terms of mass fraction: quicklime 10%-40%; sintered shale powder 50%-80%; glutinous rice starch 4%-8%; gypsum 4%-6%; Calcium 2% - 8%; the preparation process is as follows: First, the glutinous rice starch is mixed with a certain amount of water and cooked at 75°C - 85°C for 2h - 2.5h to obtain a modified glutinous rice starch slurry; then sintered shale powder, quicklime, Mix gypsum and calcium hydroxide evenly; add the prepared modified glutinous rice starch slurry and the remaining water and stir for 1min-2min to obtain the repair material; the water-material ratio is 0.45-0.56. Sintered shale powder is selected as the repair material for the weathered brick body. The color of the obtained sintered shale powder is the closest to that of the original brick body. Rapid cooling of the sintered shale powder can make part of the SiO2 in a high-energy active state. This facilitates subsequent reactions.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a repair material for weathered clear water bricks. Background technique [0002] my country is a country with a long history and strong cultural heritage, so it has achieved a large number of ancient architectural groups with a wide variety and a large number. After hundreds or even thousands of years of baptism, the treasures left by these ancestors have been continuously affected by natural weathering (climate change, sunlight, wind and rain erosion, etc.), and at the same time, the rapid development of the industrial revolution and urbanization The rapid expansion and the rise of tourism have caused great damage to the existing ancient buildings, and various minor damages gradually accumulate and eventually cause the overall damage of the building. For example, the Great Wall, the greatest project in the world, has been severely eroded by natural weathering and ...

AI Technical Summary

Problems solved by technology

In the huge number of ancient building systems in our country, the clear water brick wall is the main load-bearing wall material. The weathering effect not only affects the overall appearance quality of the building, but also directly threatens the service life of the building.