Effect of shale ceramsite type on the tensile creep of lightweight aggregate concrete
Effect of shale ceramsite type on the tensile creep of lightweight aggregate concrete
复制标题
DOI：
10.1016/j.conbuildmat.2013.04.013
复制
发表时间：
2013-09
影响因子：
7.4
通讯作者：
Y. Zhuang;Cai-Yi Chen;Tao Ji
中科院分区：
文献类型：
--
作者：
Y. Zhuang;Cai-Yi Chen;Tao Ji
采用高吸水率陶粒（YAS）、低吸水率陶粒（YCS）和正常重量粗骨料（NCA）作为混凝土的粗骨料。YCS、YAS和NCA在掺入混凝土前分别预浸泡24 h。YCS、YAS和NCA混凝土的净水灰比取为0.35。测定了用上述粗骨料配制的混凝土的力学性能和自收缩。采用新型的收缩约束试验环，对混凝土的拉伸徐变进行了研究。研究表明，YAS轻骨料混凝土的拉伸徐变小于YCS轻骨料混凝土，而YCS轻骨料混凝土的拉伸徐变与NCA普通混凝土的拉伸徐变相似。
High water absorption ceramsite (YAS), low water absorption ceramsite (YCS), and normal-weight coarse aggregate (NCA) were used as coarse aggregates in concrete. YCS, YAS and NCA were respectively pre-soaked for 24h before their mixing into concrete. The net water/cement ratio of concrete with YCS, YAS and NCA was taken as 0.35. Mechanical properties and autogenous shrinkage of concrete made with the abovementioned coarse aggregates were determined. The tensile creep of these concrete was investigated by using a newly developed shrinkage-restrained testing ring. This study shows that the lightweight coarse aggregate concrete (LWAC) with YAS has the lower tensile creep than the LWAC with YCS, which has the similar tensile creep to the normal-weight coarse aggregate concrete (NC) with NCA.