The Use Of Waste From Marble Workshops As An Alternative To Fine And Coarse Aggregates For The Production Of Concrete

Abstract

The wastes of the marble industry have a negative impact on the environment in which they are thrown as industrial wastes, and only a small amount of it is used in some works. These large quantities of waste may reduce the porosity of the soil and its permeability to absorb water, which causes diseases, especially related to the respiratory system of some of the residents close to the area, and also causes groundwater pollution. It also negatively affects the landscape of the area. Therefore, this study dealt with the use of waste from marble workshops as coarse aggregate as an alternative to the local aggregate found in Libya (plowing and blasting aggregate) in varying proportions in the manufacture of regular concrete. The waste from marble workshops was also used as fine aggregate at rates (10, 30, 50)% of the local fine aggregate. (sand) in the normal concrete mix. The suitability of using fine and coarse marble waste aggregates w[1]as evaluated through a number of tests represented in the mechanical and physical tests of the aggregates, in addition to the well-known concrete tests such as determining the operational properties and pressure. The obtained results encouraged the use of marble residues as coarse and fine aggregates in ordinary concrete. It was found that the mechanical properties of coarse and finer marble aggregates were within the limits of specifications. As for the compressive strength, it was noted that the concrete containing coarse marble aggregates by 50% with blasting aggregates gave values of compressive strength higher than the resistance obtained in the mixtures manufactured from local aggregates (plowing and blasting). As for the concrete containing the rubble left over from fine marble spraying with 30% of the local fine aggregate (sand), it gave higher compressive strength than the resistance given by the regular concrete, which contains local fine aggregate. Based on these results, it is recommended to use the rubble left over from the marble workshops as an alternative to the local rubble, according to the limits of this research .