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Abstract
This study is aimed to evaluate the production process of controlled low strength material(CLSM)using foaming technology. Testing variables include air content(30%,45%), water/binder ratio(0.45,0.60)and replacement percentage of cement by fly ash(0%, 20%, 40%, 60%, 80%). Test results indicate that for meeting the requirements of general type CLSM and appropriate economic efficiency, Air content of 45%, water/binder ratio of 0.45~0.60, and cement replacement percentage of is 40%~80% Would be selected for CLSM. For early strength type CLSM, initial setting should be controlled within 3~5hr. The air content of CLSM can be set at 30%, water/binder at 0.45, content of calcium chloride at 5%(by weight of binder), In case of the chloride ion content is not limited in CLSM application. The CLSM prepared by this study provides light weight, high flowability, Cost effectiveness (reduction of material cost at least 30%), and high water permeability.
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