The Utilization of Waste Marble Dust as a Cement Replacement in Air-Cured Mortar

Abstract

The aim of this study is to assess the possibility of utilizing waste marble dust (WMD) as a partial cement substitution in air-cured mortar (ACM). Three different levels of cement replacement were analyzed: 5%, 10% and 15% by cement weight. The specimens were manufactured in a local laboratory at an air temperature of 22 ± 2 °C and a humidity equal to 20 ± 1%. The chemical and physical properties of ordinary Portland cement and WMD has been found to be the most crucial parameters. A variety of macroscopic tests, such as apparent density, porosity and compressive strength, were proposed in order to explain the effect of utilizing the WMD on the ACM. To confirm the results of the macroscopic properties, thorough microstructural analysis using scanning electron microscopy (SEM) was performed. The obtained results of this study indicate that replacing cement with WMD affects the physical and mechanical properties of air-cured mortar. The apparent density and compressive strength decrease while the porosity increases.

Ultrasonic Evaluation of Cement-Based Building Materials Modified Using Marble Powder Sourced from Industrial Wastes

“…The Υ ad slightly decreases by increasing the MP content at all curing ages and in both curing conditions compared to the control cement paste or mortar. This could be attributed to the presence of ultrafine particles [19,21], which contribute to the decrease in the Υ ad of the matrix, also to the specific gravity of the MP, which is lower than that of the PC [15,24,25].…”

“…This is may be due to the water accumulating around MP grains which leads to reduce the water required for 28 days to complete the hydration process of cement grains and therefore resulting in an increase in the porosity. In addition, it may also be mainly due to the trapped air that formed when Portland cement and sand aggregates are mixed with MP [21] creating air voids. However, when the incorporation level of MP is slightly higher such as, 10% and 15% of the cement's weight, the UPV decrease as a corresponding result.…”

“…Most of studies performed the UPV test on the concrete incorporated the MP as replacement of cement or sand. For the best of our knowledge, there is no study related to the UPV evaluation on cement paste and mortar made with MP as cement replacement in different curing condition, and as a continuity research task of the previous destructive evaluations on cement paste [19,20] and mortar [21], the UPV test is herein adopted as a non-destructive method for the evaluation of the mechanical properties of cement paste and mortar.…”

“…Furthermore, the economical aspect of the study was shown in terms of the price of transport from marble mine and cement plant to the construction sites and the price of composite materials ( Figure 2). a continuity research task of the previous destructive evaluations on cement paste [19,20] and mortar [21], the UPV test is herein adopted as a non-destructive method for the evaluation of the mechanical properties of cement paste and mortar. In the present study, both destructive and nondestructive tests were performed for the purpose of validating the experimental results that were obtained from the destructive tests.…”

Surface Modification of Lightweight Mortars by Nanopolymers to Improve Their Water-Repellency and Durability

“…In line with the global trends of energy-efficient construction, conventional mortars can be replaced by lightweight alternatives. Many researchers have focused on researching lightweight eco-mortars in which traditional components have been replaced for example by, wood by-products [1,2], waste marble dust [3], expanded cork [4], cork granulate composite [5], expanded polystyrene [6], paper sludge ash [6], expanded perlite [7,8], recycled polyurethane foam [9], polyurethane wastes and non-ionic surfactants [10], polymeric wastes [11], pumice [12], vitrified microsphere [13], waste perlite power [14], Styrofoam waste [15], ground waste glass [16], aerogel [17], vermiculite and waste polystyrene [18], recycled Etna volcanic aggregates [19], Juncus maritimus fibers [20]. As shown in Reference [1], the addition of wood waste positively influenced the improvement of some properties of mortars.…”