eva‎luation of durability of concretes containing copper slag and ferromolybdenum as a substitute for cement

1/1/1900 12:00:00 AM

In recent years, we have witnessed the growing trend of the development of cities in most countries of the world, which has caused the loss of resources and increased waste, and this has reduced the index of environmental qualities. In an age where we are facing an energy crisis and environmental pollution, sustainable development is one of the main goals and pillars to reach a world without environmental pollution and without destruction of natural resources. Concrete has a special place as a popular material in the construction industry. The production of cement in concrete is associated with high energy consumption and the release of a large amount of carbon dioxide, which has harmful effects on the environment. One of the ways that has attracted the attention of many researchers over the past decade is to replace all or part of the concrete ingredients with pozzolan or industrial wastes. Copper slag and ferromolybdenum are such materials that can be used to produce eco-friendly concrete with better permeability and durability and cost-effectively. In this research, the effect of using these two slags with replacement percentages of 5, 7.5 and 10% as a substitute for cement on the durability of concrete was investigated and then fluidity, compressive strength, volumetric water absorption, volume of permeable pore space, capillary water absorption, ultrasonic pulse velocity, rapid chloride permeability, sulfate attack resistance and electrical resistance on concrete samples at ages of 28 and 90 days were performed. The obtained results showed that the permeability and durability have improved in most of the replacement percentages. Compared to the control sample, the resistance to chloride ion penetration at the age of 90 days has been improved by 2 to 18% using copper slag and by 19 to 25% using ferromolybdenum slag. Finally, the optimal amount of replacement by weight of cement with copper slag and ferromolybdenum was observed among the replacement percentages of 5, 7.5 and 10 in the replacement percentage of 7.5.

سرباره مس , سرباره فروموليبدن , سيمان , نفوذپذيري , دوام

Copper slag , Ferromolybdenum slag , cement , permeability , durability

Mohammad Ebrahim Farhangi

Dr.Asghar Habibnezhad koorayem