Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates
Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates
复制标题
DOI：
10.1016/s0008-8846(01)00608-1
复制
发表时间：
2001-11-01
影响因子：
11.4
通讯作者：
Kovler, K
中科院分区：
文献类型：
--
作者：
Bentur, A;Igarashi, S;Kovler, K
研究了高强轻骨料混凝土的自收缩抑制性能。本文还讨论了用轻骨料部分取代正常骨料对混凝土自收缩的影响。饱和轻骨料混凝土无自收缩，而相同基质的普通混凝土收缩较大。用25%（体积）的饱和轻集料部分取代正常重量集料，可以有效地消除正常重量混凝土的自收缩和约束应力。应该注意的是，饱和轻集料向高强水泥基体的内部供水引起了连续膨胀，这可能与连续水化有关。(C)2001爱思唯尔科技有限公司版权所有。
Restrained autogenous shrinkage in high-strength lightweight aggregate concrete was investigated. Effects of a partial replacement of normal-weight aggregate by lightweight aggregate on autogenous shrinkage were also discussed. The concrete with saturated lightweight aggregate exhibited no autogenous shrinkage, whereas the normal-weight concrete with the same matrix exhibited large shrink-age. A partial replacement of normal-weight aggregate by 25% by volume of saturated lightweight aggregate was very effective in eliminating the autogenous shrinkage and restrained stresses of the normal-weight concrete, It should be noted that the internal supply of water from the saturated lightweight aggregate to the high-strength cement matrix caused continuous expansion, which may be related to continuous hydration. (C) 2001 Elsevier Science Ltd. All rights reserved.