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• Potential use of dimensional limestone waste in cement mortar mixes has been evaluated. • Effect of dimensional limestone waste on drying shrinkage of mortar mixes has been studied. • Micro-structure analysis like FT-IR, XRD and SEM has been carried out on mortar mixes. The present study was undertaken to evaluate the potential of dimensional limestone waste (DLW), generated during cutting and polishing activity, as fine aggregate in mortar mixes. For this, the generated waste was used in two forms, first as slurry and second as manufactured sand. A total of fourteen mortar mixes (volumetric ratio 1:3 and 1:6) were prepared by replacing conventional fine aggregates (river sand) between 0 and 60% with dimensional limestone slurry (DLSS) and manufactured dimensional limestone crushed sand (DLCS). These mortar mixes were evaluated on the basis of workability, compressive, flexural, adhesive and tensile bond strengths, drying shrinkage, water absorption, porosity, density, ultrasonic pulse velocity, and dynamic modulus of elasticity. A positive impact of DLW on strength properties of mortar mixes was observed between 20 and 60% replacement of conventional river sand. Use of DLW resulted in a much denser and homogeneous mixture, reducing water-cement ratio, and improving the workability of mortar. Using DLW as partial replacement of fine aggregate resulted into improved strength properties of mortar. However, above 20% replacement, the drying shrinkage of all mortar mixes increased continuously. Structural matrix of mortar mixes, analyzed by scanning electron microscopy (SEM) images, Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) substantiate the above results. Use of DLW as partial substitution of conventional river sand may help to conserve the non-renewable natural resources with alternative building material. [ABSTRACT FROM AUTHOR]

In the present study, limestone (famous as Kota stone) mining waste reformed into aggregates of size between 19 mm and 0.075 mm were used to make bituminous concrete (BC) and dense bituminous macadam (DBM) by replacing conventional (Basalt) aggregates. Properties of LSW as aggregates was evaluated on the basis of physical parameters and mix performance. The mixes were evaluated on the basis of strength, durability, resistance to moisture and rutting. Results indicated suitability of LSA (Kota stone aggregates) as pavement material. Up to 50% replacement of conventional stone (CS) by LSA in BC mixes and 25% in DBM gave satisfactory results for moisture susceptibility, resistance to rutting and low temperature cracking. It was recommended to use LSA for making medium to low traffic roads. [ABSTRACT FROM AUTHOR]

• SF, MSP, and FA were incorporated in HSSCC mixes as potential cement substitute. • Mechanical, abrasion and microstructural performance of HSSCC mixes were assessed. • The Ca/Si ratio played an important role in the strength development. • The collective use of 10% MSP and 15% FA, with 5% SF showed excellent performance. An experimental program was conducted to evaluate the impact of silica fume (SF), marble slurry powder (MSP), and fly ash (FA) on the mechanical properties and abrasion resistance of high strength self-consolidating concrete (HSSCC). For this, Ordinary Portland Cement (OPC) was replaced by SF, MSP, and FA in various proportions in individual and simultaneous manner. Altogether sixteen numbers of concrete mixes were prepared. The mechanical properties were evaluated by performing compressive strength, split tensile strength, flexural tensile strength, pull-off strength tests. The microstructural analysis was also carried out using field emission scanning electron microscope (FESEM) and Energy-dispersive X-ray spectroscopy (EDS) techniques. Amalgamation of MSP and FA in HSSCC resulted in better mechanical performance. The combined use of SF, MSP, and FA in HSSCC at 5%, 10%, and 15%, respectively has produced the best results in terms of mechanical performance. The EDS analysis showed the effect of Ca to Si ratio in strength development and this ratio found to be crucial. A statistical approach also shows the significance of the SF, MSP, and FA on the test results. [ABSTRACT FROM AUTHOR]

• Improved fresh properties were found by introducing MCSW and FA in HSSCC. • FA used up to 25% in ternary mixes resulted in comparable compressive strength with the 5SF mix. • Combined use of MCSW up to 10% and FA up to 15% along with 5% SF resulted in better resistance to water absorption. • SEM analysis indicated improved microstructure by combined use of MCSW up to 10% and FA up to 15% along with 5% SF. Disposal of marble cutting slurry waste (MCSW) has acquired a disastrous proportion and is a leading cause of environmental and health-related issues. On the other hand, high strength self-compacting concrete (HSSCC) is being widely used which requires a higher quantity of cement and ultimately resulting in the substantial CO 2 emission to the environment. The aim of this study is to produce economical and eco-efficient HSSCC using MCSW, fly ash (FA), and silica fume (SF). This would help to beneficially use MCSW and minimize the need to use large quantities of cement in HSSCC production, thus significantly reducing CO 2 emissions. Total sixteen number of HSSCC mixes in binary, ternary and quaternary form were prepared by incorporating MCSW, FA, and SF as a replacement of cement. Among all HSSCC mixes, one mix was prepared with a 100% cement binder which was named as control mix. The impact on fresh properties was assessed by slump flow, T 500 time, V-funnel time, fresh density, L-box height ratio, J-ring flow, and J-ring step height. Mechanical performance in terms of compressive strength, and other properties like percentage of water absorption, percentage of voids, and dry bulk density were also examined. The microstructural investigation was carried out using the Scanning electron microscope (SEM) and Fourier transform infrared radiation (FTIR) techniques. It was observed that the incorporation of MCSW and FA improved the fresh properties of HSSCC. A combined use of 10% MCSW and 15% FA with 5% SF as cement replacement resulted in enhanced mechanical performance and amended microstructure. [ABSTRACT FROM AUTHOR]

• Review of studies pertaining to use of dimensional stone waste in mortar mixes. • Dimensional stone waste as fine aggregate in mortar improve strength and durability. • At higher substitution level dimensional stone waste as fine aggregate increase water demand and shrinkage characteristics. Dimensional stones are natural rocks that exhibit distinctive texture, vibrant colour and unique patterns. They are hard and durable, and, hence can be easily shaped into various shape and sizes; to be used as floor and cladding decorative purpose. Mining of these stones is highly unsustainable process producing tons of solid and slurry waste which pollutes the local environment. Studies are available where this discarded waste is used as a substitution of conventional construction and building material. The present review paper explores the effect of dimensional stone waste on workability, strength and durability properties when used as partial to full replacement in variety of mortar mixes. Reviews of studies suggest that the discarded waste improve compressive and tensile strength, enhances the durability characteristics and bond properties of mortar. However, the inclusion of this waste also increases the overall water demand to achieve the desired workability. The review of literature also highlights the shortcoming in the available literature and possible scope of research which are required in order to establish the use of dimensional stone waste as a construction material for mortar. [ABSTRACT FROM AUTHOR]