Internal water curing with Liapor aggregates
Internal water curing with Liapor aggregates
复制标题
使用 Liapor 骨料进行内部水固化
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
P. Lura
中科院分区：
文献类型：
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作者：
P. Lura
内部水养护是一种非常有效的方法，可以抵消高性能混凝土的自干燥和自生收缩，从而降低早期开裂的可能性。本文论述了湿轻骨料实现的轻骨料混凝土的早期体积变化和水分迁移。研究了不同饱和度和不同轻集料粒径的轻集料混凝土混合料，并与普通混凝土进行了比较。测定了自变形、完全约束条件下的自应力、弹性模量和抗压强度.混合物的早期膨胀是更大的轻骨料的饱和度越高，其颗粒尺寸越细。用简单的复合模型计算了轻骨料混凝土的弹性性能和早期膨胀，与试验结果吻合较好。
Internal water curing is a very efficient way to counteract self-desiccation and autogenous shrinkage in high performance concrete, thereby reducing the likelihood of early-age cracking. This paper deals with early-age volume changes and moisture transport in lightweight aggregate concrete realized with wet lightweight aggregates. Lightweight aggregate concrete mixtures with different degree of saturation and different particle size of the lightweight aggregates were studied and compared to normal weight concrete. Autogenous deformations, self- induced stresses in fully restrained conditions, elastic modulus and compressive strength were measured. Early-age expansion of the mixtures was greater the higher the degree of the saturation of the lightweight aggregates and the finer their particle size. The elastic properties and the early- age expansion of the lightweight aggregate concrete were calculated with simple composite models, showing good agreement with the experimental findings.