The nature of the slurry from the stone-crushing and sand-making processes is analyzed to develop a novel separation process.The process comprises hydro-cyclone separation followed by screening of the fines,clarificat...The nature of the slurry from the stone-crushing and sand-making processes is analyzed to develop a novel separation process.The process comprises hydro-cyclone separation followed by screening of the fines,clarification,and filtration.Recovering fine sand and clean wastewater for recycle is demonstrated.The +0.045 mm fine sand fraction and à0.045 mm ultra-fine clay in the slurry are separated and recovered.Fine sand that was previously lost and wasted is now recoverable.The cleaned and reused water is as much as 94% of the total.展开更多
This research will examine the potentially economic, environmental, and political impacts for recycling the stone slurry in Palestine through utilization of this slurry in the ready mix concrete industry. The utilizat...This research will examine the potentially economic, environmental, and political impacts for recycling the stone slurry in Palestine through utilization of this slurry in the ready mix concrete industry. The utilization concept is concluded in incorporation of the stone slurry as a partial replacement of the fine ingredient of the concrete mix which is the natural sand, based on several empirical studies that have proved the possibility for this utilization. The proposed utilization would result in a rather integration between these two main economic sectors: stone industry, and ready mix concrete industry. The results of this research revealed significant economic and environmental gains in terms of money and natural resources saved if partial replacement of natural sand with fresh stone slurry has been adopted.展开更多
Most of the materials used in engineered cementitious composite are fine in size to achieve ductile nature.Stone slurry powder(SSP)is an inert material obtained from stone industries as by-product which may cause haza...Most of the materials used in engineered cementitious composite are fine in size to achieve ductile nature.Stone slurry powder(SSP)is an inert material obtained from stone industries as by-product which may cause hazardous impact on environment.In this research work,partial replacement of silica sand(SS)and fine sand(FS)by SSP with different contents(25%and 50%each)for making engineered cementitious composite has been explored.The performance was evaluated on the basis of strength,tensile strain,mid span deflection capacity,ultra-sonic pulse velocity and microstructure.Mechanical strength was found to be increased at 25%SSP in both replacements;whereas,strength decreased slightly at 50%replacement.Tensile strain,mid span deflection and quality of concrete were enhanced with increase in SSP content.Using SSP formed denser cementitious composite can help to save the natural resources and contribute in making green cementitious composite.展开更多
基金financially supported by Xinkaiyuan Crushed Stones Co. Ltd
文摘The nature of the slurry from the stone-crushing and sand-making processes is analyzed to develop a novel separation process.The process comprises hydro-cyclone separation followed by screening of the fines,clarification,and filtration.Recovering fine sand and clean wastewater for recycle is demonstrated.The +0.045 mm fine sand fraction and à0.045 mm ultra-fine clay in the slurry are separated and recovered.Fine sand that was previously lost and wasted is now recoverable.The cleaned and reused water is as much as 94% of the total.
文摘This research will examine the potentially economic, environmental, and political impacts for recycling the stone slurry in Palestine through utilization of this slurry in the ready mix concrete industry. The utilization concept is concluded in incorporation of the stone slurry as a partial replacement of the fine ingredient of the concrete mix which is the natural sand, based on several empirical studies that have proved the possibility for this utilization. The proposed utilization would result in a rather integration between these two main economic sectors: stone industry, and ready mix concrete industry. The results of this research revealed significant economic and environmental gains in terms of money and natural resources saved if partial replacement of natural sand with fresh stone slurry has been adopted.
基金Project(F1-17.1/2017-18/MANF-2017-18-HAR-78129)supported by the University Grants Commission New Delhi,India。
文摘Most of the materials used in engineered cementitious composite are fine in size to achieve ductile nature.Stone slurry powder(SSP)is an inert material obtained from stone industries as by-product which may cause hazardous impact on environment.In this research work,partial replacement of silica sand(SS)and fine sand(FS)by SSP with different contents(25%and 50%each)for making engineered cementitious composite has been explored.The performance was evaluated on the basis of strength,tensile strain,mid span deflection capacity,ultra-sonic pulse velocity and microstructure.Mechanical strength was found to be increased at 25%SSP in both replacements;whereas,strength decreased slightly at 50%replacement.Tensile strain,mid span deflection and quality of concrete were enhanced with increase in SSP content.Using SSP formed denser cementitious composite can help to save the natural resources and contribute in making green cementitious composite.
