【作者】 张向军；

【导师】 叶青；

【作者基本信息】 浙江工业大学 ， 材料学， 2004， 硕士

【摘要】 本文对高性能混凝土体积稳定性的特点及其补偿措施进行了系统的研究，主要包括：指出了水胶比对高性能混凝土体积稳定性的影响；分析了掺矿物外加剂高性能混凝土体积稳定性的特点；研究了联合掺加矿物外加剂和膨胀剂对高性能混凝土收缩的补偿效果；探索了用膨胀型中热水泥来配制高性能混凝土对收缩的改善。 研究结果表明：低水胶比的高强混凝土有着较高的收缩，尤其是早期收缩增幅较大；掺加矿物外加剂对后期的收缩有所控制，但效果不是十分明显，但是发现同时掺加两种矿物掺合料的高性能混凝土比只掺加一种掺合料的收缩要小；研究了硫铝酸钙型膨胀剂(UEA)对高性能混凝土补偿收缩性能，重点提出来养护条件对掺加膨胀剂高性能混凝土体积稳定性的影响，强调了加强早期湿养护的重要性；用中热水泥配制的混凝土自收缩明显低于用普通硅酸盐水泥配制的混凝土；膨胀型中热水泥混凝土的自生体积变形表现为膨胀，具有较快的形成钙矾石产生的膨胀和缓慢的方镁石水化产生的膨胀，具有良好的补偿收缩效果。更多还原

【Abstract】 The paper presents a systematic study on characteristics and compensation measure of high performance concrete(HPC). Effects of water binder ratio and mineral admixtures on the volume stabilization of HPC were studied. And HPC made from moderate heat Portland cement with expansion has been researched.The result shows that HPC is more sensitive to shrinkage cracking than normal concrete. The smaller the water binder ratio, the more serious the shrinkage. Incorporating with mineral admixtures could control the tendency of evening shrinkage of HPC, but the effect is not much remarkable. And the expansive agent UEA could compensate shrinkage, but different curing conditions have significant effects on the volume stabilization of HPC. It is necessary to enhance the water curing at the young age and try the best to prolong the curing time. And the results suggest that using moderate heat Portland cement and expansive admixture in HPC may compensate its autogenous and dry shrinkage.更多还原