Abstract
This research studies the effect of waste marble powder (WMP) as substitute of Portland cement on strength and durability of self-compacting concrete (SCC) in order to produce SCC with reduced impact environmental. For this purpose, five mixtures were designed in which four mixtures contained WMP at substitution levels of 5, 10, 15, 20%, and mixture included only the Portland cement as control mix. The realized tests are compressive strength at 3, 7 and 28 days, water capillary absorption, water absorption by immersion and sulfate attack. The results show a reduction in the compressive strength with increasing WMP content. The use of WMP was found to increase both of the water capillary absorption and water absorption by immersion. SCC containing WMP subjected to magnesium sulfate attack presented a lower expansion and higher resistance to sulfate aggressions.
Highlights
Self-compacting concrete (SCC), Self-consolidating concrete, self-leveling concrete, highlyflowable concrete or non-vibrating concrete are very fluid concretes that flow and compact under their proper weight without any effort of compaction or vibration even in highly reinforced structural elements or complex formwork (Naik et al, 2012; Kurita et Nomura, 1998)
With the same amount of the binder, the substitution of the cement by the waste marble powder (WMP) decreases the strength of SCC
Mixture containing 20% of WMP and a cement content of about 380 kg/m3 had developed at 28 days a similar compressive strength with ordinary concrete that is generally used in ordinary constructions (26MPa)
Summary
Self-compacting concrete (SCC), Self-consolidating concrete, self-leveling concrete, highlyflowable concrete or non-vibrating concrete are very fluid concretes that flow and compact under their proper weight without any effort of compaction or vibration even in highly reinforced structural elements or complex formwork (Naik et al, 2012; Kurita et Nomura, 1998). Previous studies found that the use of FAM having different grain-size and morphology enhances the compactness and provides a better workability and cohesiveness by improving the grain-size distribution and particle packing. On other hand, this reduces the risk of cracking associated to the heat of hydration leading to superior performance of SCC at long-term (Sonebi et Bartos, 1999; Boukendakdji et al, 2012).
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