利用钢铁废渣、加气混凝土碎渣及热电厂炉渣、粉煤灰为主要原料，加入胶凝材料、外加剂按适当比例预制成空心砌块，代替普通砖，有利废、节土、节能、经济的多种效果，是关系到国计民生的大事。但废渣空心砌体开裂现象较普遍，由此而产生的工程纠纷也不少，有的不仅蒙受了经济 Using steel waste residue, aerated concrete slag, thermal power plant slag and fly ash as main raw materials, adding cementitious materials and admixtures are pre-formed into hollow blocks in proper proportions to replace ordinary bricks, which is advantageous for waste, soil, energy conservation, and economy. The various effects are related to the national economy and people’s livelihood. However, the phenomenon of cracking of waste slag hollow masonry is common, and the resulting engineering disputes are also numerous, and some have not only suffered economic problems.