论文部分内容阅读
六混凝土耐久性防冻剂对混凝土耐久性的影响取决于外加剂的类型、环境条件、水泥的化学性质、矿物性能和物理性能及骨料的种类等等。6.1 混凝土的碳化由于掺防冻剂增加了水泥浆体的微孔性及改善了水泥浆体与骨料间的接触面,从而增加了混凝土的抗渗性和抗湿能力。尽管水中 CO_2的浓度随温度的降低而增加,总的碳化程度还是有所下降。使用碳酸钾时,产生
The impact of concrete durability antifreeze on durability of concrete depends on the type of admixture, environmental conditions, chemical properties of the cement, mineral and physical properties, and the type of aggregate. 6.1 Carbonization of concrete The addition of antifreeze increases the microporosity of the cement paste and improves the contact surface between the cement paste and the aggregate, thereby increasing the impermeability and moisture resistance of the concrete. Although the concentration of CO 2 in water increases with the decrease of temperature, the total degree of carbonation decreases. When potassium carbonate is used, it produces