چكيده به لاتين
In recent years, the use of recycled or waste materials has become popular in the concrete and construction materials industry. One of the important features of using these materials is availability, cheapness, no need for processing or changes in structure, and reduction of environmental degradation. In this research, the effect of adding four types of waste materials in the form of powder including, glass, rubber, iron and eggshell in amounts of 0, 7, 14, 21 and 28% instead of cement in the autoclaved ventilated light block has been investigated. After making the samples, mechanical tests including compressive and tensile strength, impact resistance, water absorption, as well as microstructure tests including Scanning electron microscope and X-ray diffraction tests were performed. The manufacturing steps of all the samples were done in an autoclaved ventilated light block production factory and the base mixture ratio of the same factory was used in order to improve the product characteristics of that factory with the help of this research. For compressive and tensile strength tests, three 10 * 20 cm cylindrical samples were made for each test, and three 15 * 15 cm cubic samples were made for each of the shock resistance and water absorption tests. The use of alternative waste materials led to an increase in the strength of cement block samples. The compressive strength of the samples containing glass, iron, rubber and eggshell increased by 104.6%, 94.1%, 120.4% and 13.2% respectively. Such an increase in tensile strength was also observed. Also, in amounts of 14% glass powder, 28% iron powder, 14% eggshell powder and 21% rubber powder, the impact resistance of the samples is 21.1, 68.4, 31.6 and 115.8 respectively. The percentage increased. Based on the analysis of the Scanning electron microscope test results, the average size of the holes in the structure has significant differences in the presence and absence of different additives. Also, the results of the X-ray diffraction test indicated that zeolite, quartz and calcium silicate were the dominant compounds in the control sample. With the addition of eggshell powder, tobermorite and calcite phases have also been observed in the sample, which is due to the presence of this material in the block. In the sample containing iron powder, the presence of iron oxide in the block structure was proved. In the samples containing glass powder and rubber powder, no new structure was observed in addition to the phases in the control sample. However, in the sample containing rubber powder, the decrease in the intensity of the crystalline peaks confirms the presence of an amorphous phase in the sample
