Evaluation of the mechanical, durability microstructural and mineralogical properties of cement composites treated with waste tire rubber

In this study, waste tire powder groups from the same waste tire material but with different particle sizes are added in cement mixtures that are intended for the production of cement composites as a replacement for certain proportions of the cement content. Four different waste tire group particle size ranges of 0-0.075 mm, 0.075-0.18 mm, 0.18-0.425 mm and 0.425-2 mm are added in cement mixtures by mass of 5%, 10% and 15%. After physical and chemical properties and particle size distributions of the prepared mixtures are determined, mortar specimens of 4x4x16 cm are taken, which are then subjected to compressive strength, weight change, microstructure (SEM-EDS) and mineralogical (XRD) analyses. When the results are evaluated, it is found that compressive strength values of cement mortars including 10% of waste tire powder are higher in thaw freezing-series when compared to the water-curing series. The SEM-EDS and XRD analyses also provided results coherent with compressive strength values. On the other hand, the wetting-drying series are found to be the series with the lowest weight change results.Scientific Research Projects Coordination Unit of Istanbul UniversityIstanbul University [7681]The authors would like to thank to Istanbul Asphalt Factories and especially to the Head of Production, Zafer Sola for supplying the wastes. The set cement factory laboratory staffs are gratefully acknowledged for their assistance with the experimental study. This work was supported by Scientific Research Projects Coordination Unit of Istanbul University, Project number 7681.WOS:0004067280000022-s2.0-8502129279

ANALYSIS OF CEMENT-BASED PASTES MIXED WITH WASTE TIRE RUBBER

Using the methods of thermal gravimetry, differential thermal analysis, Furier transform infrared analysis, and capillary absorption, the properties of a cement composite produced by introducing waste tyre rubber into a cement mixture were investigated. It was found that the composite filled with the rubber had a much lower water absorption ability than the unfilled one.Scientific Research Projects Coordination Unit of Instanbul UniversityIstanbul University [7681]The authors would like to thank to Istanbul Asphalt Factories and especially Head of Production Zafer Sola for supplying the wastes. The Set cement factory staff are gratefully acknowledged for their assistance with the experimental study. This work was supported the Scientific Research Projects Coordination Unit of Instanbul University, Project No. 7681.WOS:0003974169000112-s2.0-8501423168

Effect of silica fume and solid borax waste on compressive strength of fired briquettes

It is a well-known fact that industrial solid wastes which are commonly employed in construction sector make a significant contribution in reduction of environmental pollution. In this study, solid borax waste and silica fume were used as additive materials. In the briquette compositions, 3, 5 and 10% proportions of solid borax waste and 2, 5 and 10% proportions of silica fume were used in mixtures. In order to determine material characterization, micro structure (SEM) analyses of solid borax waste and silica fume were performed besides of physical and mechanical tests. Moreover, DTG analyses were implemented to specify material's behavior under high temperature loads. According to the test results, the values of maximum compressive strength and minimum bulk density were obtained using mixtures with proportions of 2% silica fume and 10% solid borax waste. Additionally, it was determined that the briquettes having low density and high compressive strength could be produced using aforementioned all mixtures.WOS:00041710150001