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南京市房管局修建公司在江苏省建筑科学研究所的配合指导下,从1976年起应用微胀膨混凝土浇筑屋面防水层,防水效果和经济效果都很好。使用微膨胀混凝土的原理在于:这种混凝土有较好的延性和强度,当硬化时,在防水层配筋限制的条件下产生微膨胀,从而补偿混凝土的收缩,提高混凝土的抗裂性、抗渗性,达到防水的目的。
Under the guidance of the Jiangsu Institute of Building Science, the construction company of the Housing Authority of Nanjing Municipality applied micro-expansive concrete to waterproof the roof from 1976 onwards. The waterproof effect and economic effect were very good. The principle of using slightly-expanded concrete is that the concrete has good ductility and strength. When it is hardened, micro-expansion occurs under the conditions of reinforcement of the waterproof layer, thereby compensating the shrinkage of the concrete and improving the crack resistance and resistance of the concrete. Penetration, to achieve the purpose of waterproofing.