Document Type : Original Article
Authors
1
Master's degree in Civil Engineering, Structural Engineering, Department of Civil Engineering, Islamic Azad University, Sepidan Branch, Sepidan, Iran
2
Assistant Professor, Department Of Civil Engineering, Islamic Azad University, Sepidan Branch, Fars, Iran.
3
Assistant Professor, Department of Civil Engineering, Firoozabad Branch, Meymand center, Islamic Azad University, Meymand, Iran
10.22065/jsce.2024.429062.3295
Abstract
The use of mineral waste to produce new concrete is one of the important issues in the construction industry, which can have many environmental benefits and economic savings. Today, excessive production of cement has become a crisis in human societies, especially in iran. Because the production of cement will cause the release of carbon dioxide gas and the production of pollutants in the air of cities, which has irreparable consequences. On the other hand, the supply of electricity or gas energy for the fuel cycle of cement factories faces many challenges in some days of the year, which will cause a shortage of cement and an increase in the price of cement and, of course, an increase in the price of housing. In this research, calcium carbonate oxide powder was used in different weight ratios of 5%, 10%, 15% and 20% to reduce the amount of white cement used to make white concrete. The tests performed include slump, compressive strength, tensile strength, water absorption and checking the durability of concrete against the melting and freezing cycle. The results of this research showed that the use of calcium carbonate oxide will increase the compressive and tensile strength of concrete due to the increase in the production of calcium hydroxide in cement But using 15% calcium carbonate will increase the compressive strength of concrete by 20%. Due to the increased water absorption of calcium carbonate, the durability of concrete against frost decreases. The use of 20% calcium carbonate can reduce the durability of concrete by 11.7% against the cycle of melting and freezing.
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