基于使用年限的高性能混凝土配合比设计与试验研究

工程实践证明,现今通常使用的普通混凝土的耐久性具有局限性,就算能够满足抵抗各种环境因素的耐久性要求,其安全性运行年限也较短。因此,研究的目的旨在将现行的混凝土耐久性试验检测的指标引入时间的因素,以此来推知混凝土的耐久性使用年限。通过试验研究发现:采用高性能混凝土配制技术,使用P.O 42.5和I级粉煤灰,当水胶比在0.33以下时,配制出的混凝土具有良好的抗冻性、抗侵蚀性及抗渗性,同时,配制出的混凝土具有较长的使用年限,可至少使用50年。

Based on the service life of high performance concrete mix design and test research

Engineering practice shows that,nowadays generally used ordinary comcrete has limitation in durability,although it can meet the requirements of concrete’s durability in resisting a variety environmental factors,its safe operation time is short.Therefore,this thesis aims at indexing the factor of time into the current concrete durability test,in order to infer the concrete service life.It is found by experiments:when fabricating the high performance concrete,use the P·O 42.5 and I grade fly ash,limit the water cement ratio under 0.33,thus the product has outstanding frost resistance,erosion resistance and impermeability,at the same time,concrete has a longer service life,and can be used at least 50 years.