Abstract
This study evaluates the possibilities of using residual slurry from the cutting and superficial treatment of marble for the production of self-compacting concrete (SCC). The study considers the replacement of 30% of cement by the waste material, and assessed the effects on SCC properties in fresh and hardened states. Rheological characteristics were evaluated at the paste and concrete levels. Physical-mechanical characterization considers the rate of shrinkage and compressive strength gain. Pastes and concrete properties using waste marble as filler are compared with mixtures that include limestone filler, either added to the concrete or the cement. For the same dosage, an improvement in the flowability was observed in SCC with waste marble filler. The mechanical properties of the SCC adopting marble waste are equivalent to the SCC with limestone filler. The study shows that residual slurry from the processing of marble can represents an appropriate filler to be used in SCC.
Highlights
In recent years, most advances in concrete technology have been centered around the development of concretes that support environmental sustainability
This paper presented a comparative study of the rheological, physical, and mechanical properties of self-compacting concretes made with different types of fine minerals or fillers
Cementitious paste with 100% CEM I 52.5 R (P-CEM I), shows a similar behavior to those made in relation to the pastes where 30% of said cement was replaced by marble cutting waste (P-marble powder (MP)), and those made with 100% CEM II/B-L 32.5 N (P-CEM II)
Summary
Most advances in concrete technology have been centered around the development of concretes that support environmental sustainability. For this purpose, one method has investigated the possibility of using an extensive range of industrial by-products and waste that may pollute air, water or soil, such as fly ash, silica fume, blast furnace slag, foundry sand, rice husk ash, among others (1-3). The marble block cutting system for the production of 20 mm thick plates produces waste at a ratio of 20-25% with respect to the block mass (5) In this case, an average of 170 kg of dry waste per m3 of treated marble is estimated (6). The situation is the same or even more alarming in other countries (7-9)
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