The lightweight aggregate concrete cushion is composed of lightweight aggregates (such as ceramsite, expanded perlite, foamed plastic particles, etc., and the bulk density is less than 1100kg/m #179; )A lightweight structural layer made of cement, water, and additives, laid below the building structure layer. Its core performance includes: lightweight (dry bulk density is generally 800-1900kg/m #179; , only 1/3-2/3 of ordinary concrete), thermal insulation (thermal conductivity 0.08-0.25W/m #183; K, Superior to ordinary concrete), sound insulation and shock absorption (air sound insulation of 40-50dB, effectively reducing impact sound transmission), good crack resistance (elastic modulus)