- 细观夹杂理论预测湿态混凝土抗压强度
- 点击次数：
- 发表时间： 2008-01-01
- 发表刊物： 工程力学
- 所属单位： 建设工程学部
- 卷号： 25
- 期号： 11
- 页面范围： 134-140
- ISSN号： 1000-4750
- 摘要： Meso-mechanics method of composite materials is adopted to analyze the
mechanical properties of concrete in moisture conditions, which are
influenced by the different volume fraction ratio of kinds of phases,
pore rate and also the water saturation. Cement-based concrete can be
defined as a combination of four phases: coarse aggregate, hydrated
mortar, active pore and entrained non-active pore; the active pore will
be filled with free water in moisture environment. Two types of pore and
the mortar are regarded as the equivalent matrix, and the aggregate as
the inhomogeneous inclusion. A kind of double inclusion model is
proposed based on the equivalent inclusion theory and the Mori-Tanaka's
concept of average fields. A united compressive strength expression is
established by combining with the fracture mechanics method. The
influence of various factors on the compression strength can be
reflected by parameter analysis. The theoretical results demonstrated
that the strength of concrete is controlled by the weaker component
between the aggregate and mortar, that existence of pore water would,
compared with the dry concrete, lead decrease of compression strength of
wet concrete, which are agreeable with the experimental results. - 备注： 新增回溯数据
