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http://dx.doi.org/10.14190/JRCR.2015.3.2.152

Physical Effect of Adding Stone Dust Sludge on the Properties of Cement Mortar  

Seo, Jun-Yeong (Department of Civil Engineering, Daegu University)
Choi, Seon-Jong (Department of Civil Engineering, Daegu University)
Kang, Su-Tae (Department of Civil Engineering, Daegu University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.3, no.2, 2015 , pp. 152-158 More about this Journal
Abstract
In order to investigate the feasibility of stone dust sludge as fine aggregate, an experimental study was performed on cement mortar with stone dust sludge. fresh mortar properties and strength with various stone dust sludge replacement ratios were estimated. the replacement ratio adopted in this study was 0, 10, 20, 30%. Flow, air content, and rheological properties were considered as properties of fresh mortar. Compressive strength and flexural tensile strength were measured for strength. The results are as follows. Higher amount of stone dust sludge caused reduction in slump and air content. In the rheological properties, both yield stress and plastic viscosity increased as stone dust sludge content increased up to 20% replacement ratio, but there were no remarkable difference between 20 and 30%. Yield stress increased drastically between 10 and 20%. Compressive and flexural tensile strength results indicated that the strength variation was not significant according to stone dust sludge content, but the strength gain in the early age by adding stone dust sludge was evident. the strength at the age of 28 days however did not show noticeable effect of adding stone dust sludge.
Keywords
Stone dust sludge; Cement mortar; Flowability; Rheology; Strength;
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