Performance eva‎luation of cementitious composite Made with Copper Slag and Carbon Nanotubes

1/1/1900 12:00:00 AM

Although every year researchers examine various issues related to concrete and other cement composites and make scientific eva‎luations, but due to the wide application of this material in the construction industry, there is always a need to increase knowledge and awareness about this material. Consumption is felt. Concrete is one of the most widely used building materials, researchers have tried to fix some of its weaknesses or improve its performance by using additives and new materials. The use of different compounds with special formulations can lead to the increase of some characteristics of cement composites and the loss of its weak points. Weaknesses include tensile strength, durability, etc., to compensate for this weakness, researchers use various materials, including micro-materials and nano-materials. Therefore, the behavior of these composites can be tested by adding one or more additives simultaneously. One of the additives used by researchers in the past to improve the properties of cement composites is copper slag. In addition, nano science is one of the sciences that can provide new derivatives for cement composites. In this research, carbon nanotubes, as one of the materials that have received less attention in cement composites, were added to cement composites as one of the building materials next to copper slag, and the effect of its simultaneous use was investigated. , rheology tests, mechanical tests and permeability tests were performed on the mortar after 7, 28 and 90 days of curing in order to investigate the simultaneous effect of copper slag and carbon nanotubes on the behavior and performance of cement sand mortar. For this purpose, 3 sets of samples and a total of 10 samples with different mixing plans were made. Except for the control sample, one group of samples with three different percentages of copper slag (5, 10 and 15) and another group with three different weight percentages of carbon nanotubes (0.05, 0.075 and 0.1) and two percentages of copper slag ( 5 and 10) was made. From the obtained results, it was found that the presence of copper slag alone and in combination with carbon nanotubes leads to an increase in the efficiency and fluidity of concrete, a decrease in electrical resistance, and a decrease in volumetric water absorption and surface water absorption. Also, using the optimal amount of carbon nanotube and copper slag leads to an increase of 13% in compressive strength and 8% in bending strength of the sample compared to the control sample. This optimal amount is 0.1 percent by weight of carbon nanotubes and 5 percent of copper slag.

ملات , سرباره مس , نانو لوله كربني , دوام , نفوذپذيري , مشخصات مكانيكي

cement mortar , Copper slag , Carbon nano tubes , durability , permeability , Mechanical specifications

Mohammad Jafarzade

Dr. Asghar Habibnezhad