非萘系减水剂和复合超细粉对高性能混凝土渗透性的影响

The chloride diffusion coefficient of concrete with un-naphthalene water reducing agent and composite superfine powder

使用非萘系高效减水剂和复合超细粉体配制的高性能混凝土具有较好的流动性、抗压强度和抗渗性。混凝土的扩展度达22 cm以上,在2小时内坍落度损失少于3 cm,可以满足远距离运输,混凝土28d的抗压强度达60MPa以上。测定的C l-扩散系数及通过的电量说明了使用非萘系减水剂和复合超细粉体配制的混凝土具有较好的耐久性能。

A new type of un-naphthalene water reducing agent and composite superfine powder for high performance concrete has been developed and utilized. There are several advantages for concrete made by un-naphthalene water reducing agent, for example, its compressive strength at 28d is more than 60 MPa, and the slump loss is less than 3cm in 2h. The diffusion coefficient of chloride was also tested, as a consequence, the adaptability of the water reducing agent is very important, and the durability of concrete can be improved by using mineral powder together with un-naphthalene water reducing agent.