摘要
研制出性能优良的新型水下不分散剂NDA,并利用NDA配制出C40高性能水下不分散混凝土,分析了其作用机理.研究结果表明,NDA具有工作性好、强度损失低、抗分散性能好等优点;掺加NDA的新拌水下不分散混凝土抗分散性能好,能自流平、自密实,无泌水;硬化水下不分散混凝土强度高、抗分散,抗冲磨、抗渗、抗蚀等耐入性能良好.
In this researce, admixture NDA for advanced non-dispersible underwater concrete was developed. C40 high performance non-dispersible underwater concrete added with NDA was manufactured. The mechanism of improving the performance of the concrete by adding the admixture was analyzed. The results indicate that the addition of NDA has advantages of improving workability, decreasing strength loss and enhancing anti-dispersion. Fresh non-dispersible underwater concrete added with NDA exhibits superior properties such as anti-dispersion, self-compacting and no bleeding. The hardened non-dispersible underwater concrete added with NDA has high strength together with high durability in terms of high anti-abrasion, impermeability and anti-corrosion.
基金
湖北省自然科学基金项目(2002AB079).
