Use of porous ceramic waste aggregates for internal curing of high-performance concrete
Use of porous ceramic waste aggregates for internal curing of high-performance concrete
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DOI：
10.1016/j.cemconres.2009.01.007
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发表时间：
2009-05-01
影响因子：
11.4
通讯作者：
Sato, Ryoichi
中科院分区：
文献类型：
--
作者：
Suzuki, Masahiro;Meddah, Mohammed Seddik;Sato, Ryoichi
内部养护已被广泛用于减少自收缩，从而降低高性能混凝土（HPC）早期开裂的高风险。本文研究了一种新型集料--再生废多孔陶瓷粗集料（PCCA）的内部湿养护效率。六种不同的硅灰HPC与和没有PCCA的检查相对于测量的物理和机械性能的发展。对四种不同的常规重量粗集料（NCA）替代比例进行了评价。结果表明，PCCA用于内部固化目的的高效性，可显著降低甚至完全消除用0.15的非常低的水/胶比（w/B）制备的HPC的自收缩。已经发现，掺入40%的PCCA导致非收缩HPC，其导致不显著的内应力，伴随着抗压强度的显著增加。应该注意的是，对于掺入的不同比例的PCCA，在早期或后期都没有观察到抗压强度的降低，这与一些常规的轻质骨料的情况一样。(C)2009爱思唯尔有限公司保留所有权利。
Internal curing has become extensively used to reduce autogenous shrinkage and consequently mitigate the high risk of early age cracking of high-performance concrete (HPC). This paper investigates the efficiency of internal wet curing provided by a new type of aggregate, "recycled waste porous ceramic coarse aggregates" (PCCA). Six different silica fume HPCs with and without the PCCA are examined with respect to measured physical and mechanical property development. Four different replacement proportions of normal weight coarse aggregate (NCA) by the PCCA have been evaluated. The results have shown a high effectiveness of the PCCA for internal curing purposes, to drastically reduce and even to completely eliminate autogenous shrinkage of HPC prepared with a very low water/binder ratio (w/b) of 0.15. It has been found that the incorporation of 40% of the PCCA leads to a non-shrinking HPC that results in an insignificant internal stress accompanied by a significant increase of the compressive strength. it should be noted that for the different proportions of the PCCA incorporated no decrease of the compressive strength has been observed at either early or later ages, as is the case with some conventional lightweight aggregates. (C) 2009 Elsevier Ltd. All rights reserved.