Heat-preservation and heat-insulation crack-resisting brick made from modified vitrified micro beads

Abstract

The invention relates to a heat-preservation and heat-insulation crack-resisting brick made from modified vitrified micro beads and effectively resolves the problems of large contractibility rate, poor stability, easy cracking and high cost of masonry walls. According to parts by weight, the brick is composed of the following raw materials: 100 parts of cement, 5-20 parts of coal ash, 0.005-0.015 part of polypropylene fiber, 10-50 parts of modified vitrified micro beads, 10-30 parts of activating agent, 1-5 parts of sodium silicate, 10-50 parts of sand, 10-200 parts of fine stone and 110-330 parts of water. The method for preparing the brick comprises the following steps: evenly stirring and mixing the modified vitrified micro beads, 50 parts of the cement and the activating agent to form material A, then evenly stirring and mixing the fine stone, the sand, the coal ash, the polypropylene fiber and the remaining 50 parts of cement to form material B; adding water to stirring the material A and material B into uniform brick material; pressing the brick material into block-shaped bricks by a die and curing the block-shaped bricks at 10-40 DEG C for 7-30 days, thus obtaining the final product. The brick of the invention features scientific and reasonable components, simple process, stable quality, low contractibility rate, low coefficient of heat conductivity, good heat-preservation and heat-insulation property, low cost, environmental friendliness, economy and tremendous economic and social benefits.

Description

1. Technical field [0001] The invention relates to building materials, in particular to a modified vitrified microbead thermal insulation and crack resistance brick. 2. Background technology [0002] After the country restricts clay bricks, most of the existing masonry bricks are concrete block bricks or aerated concrete blocks. The shrinkage rate of concrete blocks is large, the shrinkage rate of masonry walls is large, the shrinkage stability is poor, and it is easy to crack. However, the production process of aerated concrete blocks is complicated, and the bubbles generated by gas generation are not very stable, and steam curing is required. , relatively high cost. In order to achieve the purpose of energy saving, it is necessary to add thermal insulation work on the outer wall, and the construction process is complicated, resulting in longer construction period, increased investment, and difficult to control the quality. [0003] In recent years, there have been many s...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a modified vitrified microbead thermal insulation and anti-cracking brick, which can effectively solve the problem of large shrinkage, poor stability, easy cracking and other problems of masonry walls. The technical solution to the problem of high cost is that the modified vitrified microbead thermal insulation and anti-cracking brick is composed of 100 parts of cement, 5-20 parts of fly ash, 0.005-0.015 parts of polypropylene fiber, 10-50 parts of modified vitrified microbeads, 10-30 parts of activator, 1-5 parts of sodium silicate (used as early strength agent, the same below), 10-50 parts of sand and 10-200 parts of fine stones and water 110-330 parts are made, and wherein, said modified vitrified microsphere is that organosilicon is diluted with water (organosilicon is used as water repellent, hereinafter the same), and the volume ratio of organosilicon and water is 1: 10- 100. Spray the diluted organic silicon aqueous solution evenly on the vitrified microbeads until the surface of all vitrified microbeads is wet. Put the wetted vitrified microbeads in an oven and dry them at a low temperature of 40-60°C Or expose to the sun at 20-40°C until dry to form modified vitrified microbeads, mix the modified vitrified microbeads, 1 / 2 of the cement and activator evenly to form material A, then mix fine stones, Sand, fly ash, polypropylene fiber and 1 / 2 of the remaining cement are mixed evenly to form material B, and material A and material B are mixed with 110-330 parts of water to form a uniform brick material, which is formed by compression molding. Block bricks, cured at 10-40°C for 7-30 days, become the modified vitrified microbead thermal insulation and anti-cracking bricks of the present invention