磨细高炉矿渣对海工混凝土抗冻性和氯离子扩散性能的影响

EFFECT OF GROUND GRANULATED BLASTFURNACE SLAG ON BOTH FROST-RESISTANCE AND CHLORIDE IONS DIFFUSION PROPERTIES OF MARINE CONCRETE

以天然海水为介质研究了掺加磨细矿渣的海工混凝土抗冻性和氯离子扩散性能,通过研究水胶比、矿渣和引气剂掺量等因素对混凝土抗冻性和抗氯离子渗透性能的影响,并与普通混凝土进行对比。结果表明:矿渣虽然能提高混凝土的抗氯离子渗透性能但不能提高混凝土的抗冻性;随水胶比减小,矿渣混凝土的抗冻性和抗氯离子渗透性能同时得到提高;矿渣只有与引气剂共同使用。才能同时有效提高混凝土海水环境中的抗冻性和抗氯离子渗透性。以常用抗冻性和氯离子渗透性指标的比值(R)可以反映海工混凝土的耐久性优劣,电子显微镜分析结果与R的评价结果吻合较好。

The freezing-thawing and chloride ion diffusion of concrete blended with ground granulated blast furnace slag(GOBS), including the effects of water-binder ratio,GOBS and air-entraining agent volume on the properties of the concrete,and comparison with ordinary concrete,were investigated in natural sea water.The results show that GOBS does not improve the chloride resistance of concrete but it does improve the permeability resistance.Both the chloride and frost resistance of GOBS concrete can be improved wit...