3results about How to "Reduce dry density" patented technology

The present application relates to the technical field of aerated concrete preparation, and particularly relates to a method for preparing electrically conductive aerated concrete by using porous carbonized recycled aggregate and the aerated concrete. The process method first places pre-wetted recycled aggregate in a pressurized carbonization kettle, and industrial waste gas with CO2 concentration greater than or equal to 20% is introduced to react for 2-3 hours at 0.5-0.7 MPa and 60-70 DEG C to produce porous carbonized recycled aggregate. Then the porous carbonized recycled aggregate is dry-mixed with gel material, gypsum, conductive carbon black and reinforcing fibers, and then mixing water containing water reducing agent (water aggregate ratio 55-60%) is added to stir into base mortar. Then aluminum paste suspension is added to the mortar, and after stirring to start aeration, the mortar is poured into a mold. After 2-3 hours of static aeration, the mold is finally autoclaved and dried for 6-8 hours to obtain the electrically conductive aerated concrete. Through aggregate pretreatment strengthening, orderly dispersion of the conductive phase and hierarchical curing control, the present application can effectively solve the contradiction between light weight, high strength, electrical conductivity and durability, and provide a multifunctional green building material solution for airport construction.

The application discloses a kind of low thermal conductivity high compression phase change microcapsule foam concrete and its composite dispersion-interface anchoring preparation method.The method prepares composite dispersion solution with non-ionic surfactant and silane coupling agent, carries out pre-adsorption coating treatment to phase change microcapsule, so that wet dispersion layer and interface anchoring layer are formed on its surface;Then, the treated phase change microcapsule is mixed with cement and prefabricated foam, and foam concrete is prepared by pouring, hardening and curing.The application can improve the dispersion stability of phase change microcapsule in cement paste, enhance the interface combination of phase change microcapsule and cement hydration product, reduce the thermal conductivity of the material and increase the compressive strength, and is suitable for building energy saving and temperature regulation type cement-based material.

This invention provides an autoclaved aerated concrete (AAC) block and method for preparing it using phosphogypsum and glass powder. It belongs to the field of bulk solid waste resource utilization technology. It is an AAC block and method that enables large-scale, high-value synergistic utilization of phosphogypsum and glass powder, overcoming the problem of high dependence on natural resources in existing technologies. The product prepared by this method not only realizes the resource utilization of solid waste, but also achieves breakthroughs in key physical properties, with comprehensive advantages of being lightweight, high-strength, and having excellent thermal insulation properties.