Effect of Acidic Water on Physico-Mechanical Properties of Concrete Containing Micro-Silica | ||
| Journal of Mining and Environment | ||
| مقاله 17، دوره 14، شماره 2، تیر 2023، صفحه 653-666 اصل مقاله (5.98 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22044/jme.2023.12744.2314 | ||
| نویسندگان | ||
| Mehdi Hosseini* 1؛ Alireza Dolatshahi2؛ Esmaeel Ramezani1 | ||
| 1Department of mining engineering, Imam Khomeini international university, Ghazvin, Iran | ||
| 2Department of mining and metallurgy engineering, Amirkabir university of technology, Tehran, Iran | ||
| چکیده | ||
| This work investigates the effect of adding micro-silica as a pozzolan and a replacement for part of concrete cement when placing concrete in an acidic environment. Two types of ordinary concrete and concrete-containing micro-silica are constructed. The specimens are subjected to 0, 1, 5, and 10 cycles for two hours inside two types of acidic water containing sulfuric and nitric acid with pH = 3 and normal water with pH = 7. Mechanical properties including Brazilian tensile strength and uniaxial compressive strength, and physical properties including effective porosity, water absorption, and the longitudinal wave velocity of specimens are determined after the mentioned number of cycles. Thr results show that by decreasing the pH and increasing the number of cycles, the effective porosity and water absorption increase, and the velocity of longitudinal waves, Brazilian tensile strength, and uniaxial compressive strength of concrete decrease. Replacing 10% of micro-silica as a part of concrete cement has boosted the durability of concrete in corrosive conditions containing sulfuric and nitric acid more than ordinary concrete. | ||
| کلیدواژهها | ||
| Nitric and sulfuric Acid؛ Corrosive Condition؛ Physico-mechanical properties؛ Concrete؛ Micro-Silica | ||
| مراجع | ||
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