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采用不同水胶比、不同减水剂掺量及不同膨胀剂掺量对港珠澳大桥承台后浇孔混凝土进行试验,并对混凝土的氯离子渗透系数进行分析,研究低水胶比、减水剂掺量及膨胀剂掺量对混凝土抗渗性的影响规律。试验结果表明,随着水胶比的降低,混凝土的氯离子渗透系数减小;在低水胶比条件下,随着减水剂掺量和膨胀剂掺量的增大,混凝土的密实程度增加,抗氯离子渗透性能增强。
Different water-cement ratio, different amount of water-reducing admixture and different dosage of expansive agent were used to test the pouring hole concrete of Hong Kong-Zhuhai-Macau Bridge cap and the chloride ion permeability coefficient of concrete was analyzed. Influence of Aqueous Agent Content and Expansion Agent Content on Impermeability of Concrete. The experimental results show that with the decrease of water-cement ratio, the chloride ion permeability coefficient of concrete decreases. With the increase of water reducer and the content of expansive agent, the compactness of concrete increases , Anti-chloride ion permeability enhanced.