粉某灰防水砼具有经济效益显著、搞渗性、和易性好，施工操作方便，能明显提高工效的特性 同时粉煤灰砼搞蚀性高，水化热低，可减少砼浇灌初期由于温度变化影响砼受缩而产生的开裂，适用于地下构筑物及大体各砼工程，特别是地下水具有微腐蚀性工程。根据防水砼水灰比和灰砂比的 Fly ash gray waterproof concrete with significant economic benefits, infiltration, and easy to carry, easy to operate, can significantly improve the efficiency of the same time, engage in high performance of fly ash concrete, hydration heat is low, can reduce the initial watering of concrete due to Temperature changes affect the contraction caused by the concrete cracking, applied to the underground structures and generally each concrete project, especially groundwater has a micro-corrosive project. According to waterproof concrete water-cement ratio and lime than