22泡沫混凝土压缩特性和抗压强度模型.pdfVIP

32 11 武 汉 理 工 大 学 学 报 Vol. 32 No. 11 2010 6 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY Jun. 2010 DOI: 10. 3963/ j. issn. 1671-4431. 2010. 11. 003 周顺鄂, 卢忠远, 焦 雷, 李三霞 ( , , 621010) : 制备了一系列的泡沫混凝土, 对泡沫混凝土的压缩力学性能进行了测试, 研究了泡沫混凝土压缩应力-应变曲 线的特征, 析了影响泡沫混凝土压缩性能的相关因素, 并运用 Gibson-As by 模型对抗压强度进行了模拟, 通过拟合得 出了抗压强度与相对密度的方程, 确定了表征孔棱材料 数和孔壁断裂强度的微观结构参数研究表明, 泡沫混凝土压 缩过程 为4 个阶段, 即平台阶段密实阶段屈服阶段和衰退阶段, 其压缩力学性能受到基体材料容重和气孔形态及 布等因素的影响; Gibbson-As by 模型拟合的结果具有较高的合理性, 对 析泡沫混凝土微观结构力学性能有较大的 帮助 : 泡沫混凝土; 压缩特性; Gibbson-As by 模型 : TU 55 : A : 1671-4431(2010) 11-0009-05 Compression Property and Compression Stren th Model of Foamed Concrete ZH O U Sh un-e, L U Zhong-y uan, JIA O L ei, LI San-x ia ( Sc ool of Materials Science and Engineering, Sout west University of Science and Tec nology, Key Laboratory for Advanced Building Materials of Sic uan Province, Mianyang 621010, C ina) Abstract: A series of foamed concrete were prepared in t is paper. Compression mec anical property of foamed concrete was tested. T en, we ave done researc on stress-strain curve c aracteristics of foamed concrete, and analyzed relative factors ef- fect on compression property of foamed concrete. Compression strengt values were simulated by Gibbson-As by model. T e e- quation of compression strengt and relative density was deduced out by fitting compression strengt . Microstructure parameters c aracterizing t e proportion of pore rib and pore wall fracture strengt was determined. T e results s ow t at t ere are four steps in foamed concrete compression process, namely plateau step, compacting step, yield step an