استفاده از پودر سنگ آهک به عنوان جایگزین بخشی از ماسه سیلیسی در بتن پودری واکنش‌پذیر

In the production of reactive powdered concrete, fine-grained powder materials such as quartz sand, microsilica, and quartz powder are used as materials. This concrete has a high compressive strength compared to conventional concrete, which has attracted much attention in recent years. With this type of concrete, the weight of the structure can be significantly reduced, and its important features include high compressive strength, low permeability, durability and high abrasion resistance and high ductility that can absorb more energy during an earthquake. . In this research, we want to use limestone powder instead of a part of silica sand. For this purpose, after obtaining optimal mixing scheme based on the compressive strength and flow strength and diffusion diameter of the flow table, first replace the limestone powder with 0, 10, 20, 30 instead of silica sand, and then the powder Limestone has been used as a substitute-additive with different percentages and designs. The experiments performed on these samples included the psychological testing of the flow table and water absorption during treatment and compressive strength at the age of 7, 28 and 90 days. The results of the experiments show that by increasing the limestone powder up to 20% replacement with silica sand increases compressive strength, reduces very little in the psychological and also reduces water absorption during processing. In the production of reactive powdered concrete, fine-grained powder materials such as quartz sand, microsilica, and quartz powder are used as materials. This concrete has a high compressive strength compared to conventional concrete, which has attracted much attention in recent years. With this type of concrete, the weight of the structure can be significantly reduced, and its important features include high compressive strength, low permeability, durability and high abrasion resistance and high ductility that can absorb more energy during an earthquake. . In this research, we want to use limestone powder instead of a part of silica sand. For this purpose, after obtaining optimal mixing scheme based on the compressive strength and flow strength and diffusion diameter of the flow table, first replace the limestone powder with 0, 10, 20, 30 instead of silica sand, and then the powder Limestone has been used as a substitute-additive with different percentages and designs. The experiments performed on these samples included the psychological testing of the flow table and water absorption during treatment and compressive strength at the age of 7, 28 and 90 days. The results of the experiments show that by increasing the limestone powder up to 20% replacement with silica sand increases compressive strength, reduces very little in the psychological and also reduces water absorption during processing. In the production of reactive powdered concrete, fine-grained powder materials such as quartz sand, microsilica, and quartz powder are used as materials. This concrete has a high compressive strength compared to conventional concrete, which has attracted much attention in recent years. With this type of concrete, the weight of the structure can be significantly reduced, and its important features include high compressive strength, low permeability, durability and high abrasion resistance and high ductility that can absorb more energy during an earthquake. . In this research, we want to use limestone powder instead of a part of silica sand. For this purpose, after obtaining optimal mixing scheme based on the compressive strength and flow strength and diffusion diameter of the flow table, first replace the limestone powder with 0, 10, 20, 30 instead of silica sand, and then the powder Limestone has been used as a substitute-additive with different percentages and designs. The experiments performed on these samples included the psychological testing of the flow table and water absorption during treatment and compressive strength at the age of 7, 28 and 90 days. The results of the experiments show that by increasing the limestone powder up to 20% replacement with silica sand increases compressive strength, reduces very little in the psychological and also reduces water absorption during processing.