Potential Use of Crushed Ghanaian Limestone in Paste and Mortar Formulated for Masonry  

作　　者：Mark Bediako Albert A. Adjaottor Simon K. Y. Gawu 

机构地区：[1]Council for Scientific and Industrial Research-Building and Road Research Institute, KNUST- Kumasi, Ghana

出　　处：《Journal of Civil Engineering and Architecture》2011年第3期258-264,共7页土木工程与建筑（英文版）

摘　　要：Crushed Ghanaian limestone （L） powder was analysed for its physical, chemical and microstructural properties for the formulation of mortar for masonry. Ordinary Portland Cement （OPC） was replaced by 10- 40% limestone powder for paste and mortar formulation. Mechanical properties that included compressive strength, water demand and setting times （initial and final） were determined and analysed. The mechanical properties were determined in accordance with ASTM standards. The test results indicated that crushed limestone powder contained about 88.7% CaO in calcite form. A 10-30% and 35-40% limestone content in conjunction with OPC was suitable to produce ASTM type M and S mortars respectively. Formulated OPC - L paste showed a high water demand, a delayed initial setting time and an accelerated final setting time than the plain OPC paste.

关 键 词：Limestone powder masonry mortar water demand setting times compressive strength 

分 类 号：TU578.1[建筑科学—建筑技术科学] X773[环境科学与工程—环境工程]