چكيده به لاتين
The growing population and the human need for a place to live, has caused more and more people and groups to pay attention to the construction industry. In proportion to the large amount of construction, the use of building materials increased. Population growth and industry growth indirectly increased the use of natural resources and the growth of waste materials. Large amounts of waste are industrial waste. To minimize the negative effects of this, the researchers looked at waste recycling and reuse as a solution to reduce the consumption of natural materials. Concrete is one of the most common building materials used in the construction industry. Concrete is made of cement, mineral aggregates and water, and its per capita consumption in the world is estimated at more than 10 billion tons per year. Considering that the production of each kilogram of cement causes the production and emission of approximately one kilogram of carbon dioxide in the atmosphere; Researchers are looking to use cement alternatives in concrete to help preserve the environment and reduce production costs. Cement substitutes include natural pozzolans such as zeolite, ash, rice husk and pumice, or industrial by-products such as blast furnace slag, microsilica, and fly ash. The annual production of slag from copper and ferromolybdenum plants in the world is very high and its disposal is a big problem. Iran is also struggling with the disposal of these substances. The purpose of this study is to use these two types of industrial waste materials in concrete as a substitute for cement in order to reduce the consumption of cement to achieve environmentally friendly concrete and solve the problem of disposal of these industrial by-products. Among the advantages of using them in concrete construction, we can mention the ability to improve the mechanical properties and durability of concrete due to silica and iron oxide. According to initial tests in cement slag, cement substitute with 5 and 7.5 percent compressive strength has increased by 6 to 8 percent. Also, in ferro-molybdenum slag with 2.5 and 5 percent resistance, it increased to 12 percent of the control sample, which is satisfactory. In flexural strength of copper and ferromolybdenum slag with the announced percentages, the strength increased from 8 to 12%. The compressive and flexural strength of the specimens decreased with increasing slag. Also, the permeability of the samples was examined, which was satisfactory
