Ultra-low apparent density and high-performance foam concrete material and its preparation method

The invention relates to an ultra-low apparent density and high-performance foam concrete material and its preparation method. The material comprises the following components by mass: 30%-70% of cement, 0%-30% of an admixture, 0%-30% of a porous particle aggregate, 0.3%-5% of a polymer, 0.3%-3% of a fiber, 0.3%-0.5% of a foaming agent, 0.1%-0.5% of a water reducing agent, 0%-1.5% of an early strength agent, 0.1%-0.5% of a shrinkage reducing agent, 0%-3% of a layered material, and 26%-50% of water. Compared with ordinary foam concrete, the material prepared in the invention has the technical advantages of ultra-low apparent density, small coefficient of heat conductivity, and no dry shrinkage cracking, etc. And compared with current foam polyphenyl boards for exterior wall external thermalinsulation, the material of the invention has the advantage of non-combustion.