The good quality 425r silicate cement and 525 silicate cement , which are produced by the use of rotary kiln and up to the national standard gb175 - 92 , are particularly suitable for the construction of buildings for civil use , airport , road , port , and dam because of its good early strength , quick condensation , good freeze and abrasive resistance , and low basicity content 我公司出品的425r 525普通硅酸盐水泥，系采用国湿法旋窑生产工艺，按国家标准gb175 - 92精心组织生产。具有早期强度高凝结硬化快抗冻性好耐磨性好含碱量低等特点，曾获得福建省优质产品称号。
At the same time fly ash and silica fume also can repress the anti - sulfate attack and the alkali - aggregate reaction ; in addition , the relation between air - entraining admi xture , cementitious materials quantity with freezing - thaw property of concrete were studied ; and according to the different affecting factors the durable life of concrete was estimated 同时粉煤灰、硅灰还可以抑制硫酸盐侵蚀及碱集料反应；此外，分析了混凝土中含气量、胶凝材总量等与混凝土抗冻性的关系。并且，根据相应影响因素对混凝土耐久性寿命进行了预测。
In the aspect of mortar permeability the author has done some experiments , including the water absorption , porosity , weatherability , anti - freeze - thaw cycle , carbonation and the chloride diffusion experiment , and compared those properties with conventional mortar to testify the modified effects . on the base of these experiments , the method of sem was used to analyze the microstructure and hydration mechanism of polymer modified cement mortar , and the author draws a conclusion that the 9 percent of polymer - cement ratio is the optimum ratio 在改进砂浆的密实度和抗渗性能方面，主要进行了不同聚合物掺量下的吸水性试验、可透孔隙率试验、耐老化性试验、抗冻性试验、抗碳化试验，以及对耐久性能影响最大的快速氯离子扩散试验，并和普通砂浆的相应试验进行了对比分析，验证了聚合物砂浆的改性效果。
In the northern area of our country , the climate is so cold , that the frost damage is very serious , especially in the northeast . induced air into the concrete is the most efficient way to improve the behavior of the frost resistance . therefore , studying on the reinforcement corrosion of the air - entrained concrete has important significance 我国北方地区气候寒冷,冻害比较严重,东北地区尤甚,而引气是提高混凝土抗冻性的最有效措施,因此研究引气混凝土的抗钢筋锈蚀性能有重要的现实意义和明显的经济效益。
The research work about durability of high - performance self - compacting micro - expansive concrete show that the micro - expansive function and micro - bubble producing function of mineral admixture h can improve the impermeability , frost - resistance ability and sulfate eroding resistance ability etc of self - compacting concrete 研究了免振捣微膨胀高性能混凝土的各项耐久性能，结果表明：山于新型矿物添加剂h的微膨胀功能和微量发气功能，研制成功的免振捣微膨胀高性能混凝土具有优良的抗渗性、抗冻性、抗硫酸盐侵蚀等耐久性能。
