Porosity, pore size distribution and in situ strength of concrete
Porosity, pore size distribution and in situ strength of concrete
复制标题
DOI：
10.1016/s0008-8846(02)00942-0
复制
发表时间：
2003-01-01
影响因子：
11.4
通讯作者：
Bhattacharjee, B
中科院分区：
文献类型：
--
作者：
Kumar, R;Bhattacharjee, B
在这项研究中，混凝土的原位强度是通过从实验室浇注梁钻孔芯的压缩试验确定的。同一混凝土的显气孔率和孔径分布通过压汞孔隙度法测定，进行小钻芯。在实验研究中使用的正常强度的混凝土混合物的设计表现出很大的变化，在他们的实力。为保证混凝土孔隙率、孔径分布和强度的进一步变化，试验方案中还引入了两种压实方式、两种粗骨料、不同龄期、不同养护期和不同暴露条件的混凝土。利用由此产生的数据，对水泥基材料的强度、孔隙率和孔径之间最常提及的关系进行了评估。最后，提出了一个新的经验模型，将混凝土的现场强度与孔隙率、孔径特征、水泥含量、骨料类型、暴露条件等联系起来，给出(C)2003爱思唯尔科技有限公司。保留所有权利。
In this study, in situ strength of concrete was determined through compression test of cores drilled out from laboratory cast beams. The apparent porosity and pore size distribution of the same concrete were determined through mercury intrusion porosimetry, performed on small-drilled cores. The normal-strength concrete mixes used in the experimental investigation were designed to exhibit a wide variation in their strengths. To ensure further variation in porosity, pore size distribution and strength, two modes of compaction, two varieties of coarse aggregates, different levels of age,curing period and exposure condition of concrete were also introduced in experimental scheme. With the data so generated, an appraisal of the most frequently referred relationships involving strength, porosity and pore size of cement-based materials was carried out. Finally, a new empirical model relating the in situ strength of concrete with porosity, pore size characteristics, cement content, aggregate type, exposure conditions, etc., is presented. (C) 2003 Elsevier Science Ltd. All rights reserved.