Preparation method of sound-absorbing autoclaved aerated concrete block

Abstract

The invention discloses a preparation method of a sound-absorbing autoclaved aerated concrete block. The preparation method comprises the following steps: heating, mixing and performing wet milling ona tailing-clay compound, coal gangue, expanded perlite, glutinous rice flour and precipitated barium sulfate, then heating, adding iron powder and a foam stabilizing agent, stirring, performing compression moulding, precuring, and autoclaving to obtain the sound-absorbing autoclaved aerated concrete block, wherein the tailing-clay compound is prepared according to the following technology: sending a tailing, clay, epoxy resin and methylbenzene into a mixing machine, heating while stirring, adding diethyldiethoxysilane, stirring, adding disproportionated rosin and soy lecithin, continuing stirring, filtering, washing a filter cake by using methylbenzene, drying and crushing to obtain the tailing-clay compound. The sound-absorbing autoclaved aerated concrete block prepared according to thepreparation method provided by the invention has uniform internal pore sizes, can form independent closed pores, and has excellent sound-absorbing and sound-insulating performance; in addition, due toa good pore structure, the strength of the sound-absorbing autoclaved aerated concrete block is higher than that of a block produced by an ordinary technology, and the density can be relatively reduced.

Description

Technical field [0001] The invention relates to the technical field of autoclaved aerated concrete blocks, in particular to a method for preparing sound-absorbing autoclaved aerated concrete blocks. Background technique [0002] At present, large-scale urban infrastructure construction, housing construction, and improvement of people's livelihood projects are underway in many areas of our country. However, the scarcity of land resources has made the floors built higher and higher, and the load-bearing capacity of the land has almost reached the limit. There have also been safety accidents of foundation sinking and building tilt in many places. How to develop lighter and safer building materials? Major issues facing in the future. [0003] With the development of science and technology, various lightweight building materials have appeared one after another. At present, autoclaved aerated concrete blocks are widely used in China, which have low production costs and low construction...

AI Technical Summary

Problems solved by technology

At present, the autoclaved aerated concrete block is widely used in China, which has low production cost and low construction cost. Its disadvantages are poor sound absorption and sound insulation effect, and high weight, which brings great hidden dangers to building safety.