< P > < FONT face = Verdana > a large amount of waste concrete is produced in the process of urban construction. This kind of waste concrete can be turned into treasure and used as useful material. At present, many countries have used waste concrete to produce cement and other building materials. Recently, a Japanese company has developed a new way to find a new way for the use of waste concrete and succeeded in producing ceramic tiles. < P > < FONT face = Verdana > According to the introduction, the company's innovative utilization method is to first disintegrate the waste concrete and crush the disintegrated blocks with special grinding equipment. Rinding into powder with specific surface area of 5000-10000 cm2/G and density of 2.30-2.60g/cm2, wherein the content of CSiO2 is more than 40%, and the content of CaO is more than 20%; then mixing less than 30% of waste concrete powder into the clay raw material for the ceramic tile to prepare a blank, and extruding the blank by a wet method; It is sent into air for reduction or oxidation firing at 1160 ~ 1210 ℃. According to the measurement, the ceramic tile prepared from the waste concrete powder and the blank not only has good forming, but also has the water absorption, the bending strength, the water shrinkage rate after firing and the frost resistance which all reach the national standard.
(Please indicate the source for reprinting on China Concrete and Cement Products Website)
浙公网安备33010802003254号