Recent years have witnessed an increase in the quantity of waste glass(WG)across the globe.Replacing the fine aggregate with WG is one of the steps toward preserving the natural resources of the environment and creati...Recent years have witnessed an increase in the quantity of waste glass(WG)across the globe.Replacing the fine aggregate with WG is one of the steps toward preserving the natural resources of the environment and creating low-cost concrete.The present study is concerned with replacing fine aggregates with glass powder(GP)at(0%,15%,30%,and 50%).It has studied the fresh and hardened properties(compressive strength,tensile strength,hardened density,and slump)for all the mentioned percent replacements.The findings have shown that all mixtures containing GP gave acceptable slump results within the design limits(2–5 cm)according to ACI standard 211.1.It has been observed that increasing the proportion of GP led to a decrease in the weight of concrete.Lastly,replacing GP with sand by 30%has led to an increase in the compressive strength by about 2.4%and 12.45%,and the tensile strength by about 2.5%and 26.54%at 7-and 28-d,respectively in comparison to normal concrete.展开更多
The main purpose of this research is to study the durability of recycled concrete as a partial replacement of coarse aggregate in corrosive environment. 10%, 20%, 30% and 40% by weight were used for recycled concrete....The main purpose of this research is to study the durability of recycled concrete as a partial replacement of coarse aggregate in corrosive environment. 10%, 20%, 30% and 40% by weight were used for recycled concrete. Concrete samples exposed to 10% concentration dilute sulfuric acid solution for 180 days. Mechanical tests such as compressive and tensile strength tests, physical tests such as ultrasonic pulse velocity, bulk density, porosity, specific gravity and water absorption tests were done to the samples after curing in normal water for 28 days and after submerged in dilute sulfuric acid for 180 days. Degradation increased with increasing of replacement. Test results showed that 10% and 20% partial replacement of recycled concrete aggregate still closely to reference samples. Noticeable deterioration was shown in mechanical and physical properties for 30% and 40% partial replacement of recycled concrete aggregate.展开更多
基金This research work is supported by the Deanship of Scientific Research at King Khalid University under Grant No.RGP.2/246/43.
文摘Recent years have witnessed an increase in the quantity of waste glass(WG)across the globe.Replacing the fine aggregate with WG is one of the steps toward preserving the natural resources of the environment and creating low-cost concrete.The present study is concerned with replacing fine aggregates with glass powder(GP)at(0%,15%,30%,and 50%).It has studied the fresh and hardened properties(compressive strength,tensile strength,hardened density,and slump)for all the mentioned percent replacements.The findings have shown that all mixtures containing GP gave acceptable slump results within the design limits(2–5 cm)according to ACI standard 211.1.It has been observed that increasing the proportion of GP led to a decrease in the weight of concrete.Lastly,replacing GP with sand by 30%has led to an increase in the compressive strength by about 2.4%and 12.45%,and the tensile strength by about 2.5%and 26.54%at 7-and 28-d,respectively in comparison to normal concrete.
文摘The main purpose of this research is to study the durability of recycled concrete as a partial replacement of coarse aggregate in corrosive environment. 10%, 20%, 30% and 40% by weight were used for recycled concrete. Concrete samples exposed to 10% concentration dilute sulfuric acid solution for 180 days. Mechanical tests such as compressive and tensile strength tests, physical tests such as ultrasonic pulse velocity, bulk density, porosity, specific gravity and water absorption tests were done to the samples after curing in normal water for 28 days and after submerged in dilute sulfuric acid for 180 days. Degradation increased with increasing of replacement. Test results showed that 10% and 20% partial replacement of recycled concrete aggregate still closely to reference samples. Noticeable deterioration was shown in mechanical and physical properties for 30% and 40% partial replacement of recycled concrete aggregate.
