The Effects of Water/Cement Ratio and Cement Dosage Variables on the Performance of Shotcrete: Compressive Strength and Drying Shrinkage Perspective

Authors : Hasan POLAT, Cengiz ÖZEL

Pages : 82-87

Doi:10.46810/tdfd.1291146

View : 90 | Download : 25

Publication Date : 2023-06-22

Article Type : Research Paper

Abstract :Shotcrete is a construction material that is applied by spraying under high pressure, and there are many factors that affect its properties. In this study, the effect of cement dosage and water-to-cement ratio on the compressive strength and drying shrinkage performance of shotcrete was investigated. For this purpose, shotcrete specimens were produced using three different water-to-cement ratios insert ignore into journalissuearticles values(0.40, 0.45, 0.50); and three different cement dosages insert ignore into journalissuearticles values(400, 450, 500);. The unit weight, ultrasonic pulse velocity insert ignore into journalissuearticles values(UPV);, compressive strength, splitting tensile strength, and drying shrinkage performance of the produced specimens were examined. As a result of the experimental studies, an increase in cement dosage resulted in an increase in unit weight values, with the amount of increase ranging from approximately 1% to 3%. When the UPV value was examined, an increase in cement dosage resulted in an increase in UPV values, with an increase of approximately 1% to 5%. An increase in cement dosage also resulted in an increase in compressive strength and splitting tensile strength values, with the increase ranging from approximately 12%-16%, 5%-9%, and 10%-12% for the 500, 450, and 400 dosage groups, respectively. The drying shrinkage values increased with increasing cement dosage, the highest shrinkage values occurred in the groups with 0.50 water/cement ratio and 500 dosage, and it was observed that 85-95% of the total shrinkage of the shotcrete specimens was completed within the first 1 hour. Furthermore, the data obtained can be used to determine the optimum water/cement ratio and cement dosage for the construction of shotcrete.
Keywords : Püskürtme beton, Çimento dozajı, Su çimento oranı, Basınç dayanımı, Kuruma rötresi

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