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微膨胀钢筋混凝土防水屋面是指以钢筋和微膨胀混凝土作为屋面防水层的主要防水材料。其方法是根据屋面结构层的不同情况,防水层适当分仓留缝,缝内填嵌柔性接缝防水材料。其特点是:微膨胀水泥混凝土有膨胀性能,可抵消混凝土的收缩,并具有一定的胀缩可逆性,其中的钢筋能限制微膨胀混凝土的膨胀量,产生自应力使混凝土达到密实,因而具有较好的抗裂抗渗性能,而且强度高、刚度大、耐久性好,克服了传统的普通混凝土刚性防水易裂易渗和两毡三油柔性防水屋面易老化等弊病。
Micro-expanded reinforced concrete waterproof roof refers to the main waterproof material with reinforced and slightly-expanded concrete as the roof waterproof layer. The method is based on the different conditions of the structural layer of the roof, the waterproof layer is properly divided and the joints are filled with flexible joint waterproof material. Its characteristics are: micro-expansive cement concrete has expansion properties, can offset the contraction of concrete, and has a certain degree of reversibility of the expansion and contraction, wherein the steel can limit the expansion volume of the slightly-expanded concrete, resulting in self-stress to make the concrete dense, and therefore have a Good anti-crack and anti-permeability performance, high strength, high rigidity, good durability, overcome the shortcomings of traditional ordinary concrete, such as rigid waterproof and easy to crack and easy to seepe, and two-felt and three-oil flexible waterproof roof are easy to age.