摘要
减小水工大坝混凝土的体积变形,提高混凝土的体积稳定性是解决水工大坝混凝土开裂问题的关键。骨料占水工大坝混凝土体积的80%左右,因此骨料的性能对大坝混凝土体积稳定性的影响不容忽视。应优选收缩小、线膨胀系数小、坚固性高、不透水的非活性骨料作为水工大坝混凝土的骨料,在受客观条件限制而无法选择性能优良的骨料时,采用组合骨料也是提高水工大坝混凝土体积稳定性的有效手段之一。
Decreasing volume deformation and improving volume stability are two key factors to the control of dam concrete cracking.Aggregate accounts for about 80% of a concrete dam by volume,so the effects of aggregate properties on the volume stability can not be neglected.A good choice for dam packing is the aggregate of low-contractility,low-expansivity,high-solidity and good waterproofness.Under the restricted practical conditions of fine-property aggregate unavailable,using composite aggregate is one of the most efficient methods to improve the volume stability.
出处
《水力发电学报》
EI
CSCD
北大核心
2010年第5期98-101,共4页
Journal of Hydroelectric Engineering
