1　前　　言目前 ,国内每年约排放 1亿多吨的粉煤灰 ,粉煤灰的堆存占用大量农田 ,还对环境造成了严重危害。利用粉煤灰生产建筑用砌墙砖 ,可变废为宝 ,具有显著的社会效益和经济效益。无水泥粉煤灰双免砖具有一次性投资少、成本低、产品质量较高的特点。本文对粉煤灰双免砖的部 1 Preface At present, about 100 million tons of fly ash are discharged each year in the country, and the storage of fly ash occupies a large amount of farmland and poses a serious hazard to the environment. The use of fly ash building brick wall construction, variable waste treasure, with significant social and economic benefits. Double-free brick without fly ash with a one-time investment, low cost, higher product quality features. This article on the Department of fly ash double-free brick