Using Marble Waste Powder in Cement and Concrete Production
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2011-03
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Abstract
In this study, the possibility of using marble waste powder in cement and concrete production was examined by studying the effects of blending of marble waste powder with cement on the physical and chemical properties of cement paste and hardened mortar and by studying the effects of blending of marble waste powder with cement and sand on the performance of fresh and hardened concrete. For studying the properties of marble waste powder blended cements, a total of nine marble waste powder blended cements, with two different blain fineness of marble waste powder, were prepared by blending the marble waste powder with cement in replacement ranges from 5% to 20% with 5% increment by weight of cement. In studying the performance of concretes, a total of eighteen concrete mixes were prepared with cement and sand blended with marble waste powder in separate mixes with replacement ranges from 5% to 20% with 5% increment by weight of cement and sand respectively. For each replacement range, two classes of concrete, C-25 and C-50, mixes were prepared for both cement and sand replacement cases. Different test results together with literature review were used to analyze the effects of using marble waste powder in cement and concrete production. The investigation of this thesis, therefore, has revealed that compressive strengths of cement pastes from 5% marble waste powder blended Portland cement are comparable with that of cement pastes from 100% Ordinary Portland cement. For 10 and 15% replacement ranges, though reduction in compressive strength is observed, blended cements at these percents satisfy the standard compressive strength limits for high early strength of class of 42.5 MPa as per the EN 197-1 standard.
Using Marble Waste Powder in Cement and Concrete Production MSc Thesis by Abrar Awol
School of Graduate Studies-AAU March 2011 III
Observation on the test results also indicate that the effects of blending marble waste on the properties of cement such as consistency, setting times, insoluble residue, and soundness remain within the acceptable ranges of different standards. The investigation also indicates that replacement of cement by marble waste powder at 5% range, in concrete production, results in comparable compressive strength as of concrete specimens without marble waste powder with slight slump reduction for both C-25 and C-50 classes. Increment of replacement ranges beyond 5%, in concrete production, results in reduction of compressive strength and slump. Replacement of sand by marble waste powder from 5-20% ranges, in concrete production, results in similar and mostly enhanced performance than the control concrete specimens; with similar compressive strength to the control specimens, with slump improvement and water permeability depth reduction than the control specimens in both C-25 and C-50 classes. Key words: Marble waste powder, Blending, Performance of concrete
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Keywords
Marble waste powder, Blending, Performance of concrete