由黄河水资源保护科研所开发的滩区泥沙化学成型结构材料技术,1991年9月26日在郑州通过鉴定. 与会专家一致认为: 1.本项研究选题新颖,方向正确,以黄河下游淤积粉细沙为基材,加入由工业废水、废渣经过处理所制化学添加剂,加压制成的首批免烧砂砖,经河南省水科所测试,证明具有优良的抗压、抗折、抗冻、耐水、防渗功能,标号可达150~#,砖外观为一级, The technology of sediment chemistry molding structure material developed by the Yellow River Water Resources Research Institute was passed in Zhengzhou on September 26, 1991. Experts at the meeting agreed that: 1. The research topic is new and the direction is correct, with the lower reaches of the Yellow River Silt silty sand as the substrate, adding by the industrial waste water, waste residue after treatment of chemical additives, the first pressure made of sand-free brick, the water subject by the Henan Province, tested to prove that with excellent compression, bending , Antifreeze, water, impermeability, marking up to 150 ~ #, brick appearance is a,