Investigation of microstructure and physicomechanical properties of boron belit cement mortars containing blast furnace slag as alternative to Portland cement
Click here to view fulltext PDF
The cement industry is a major energy consumer and an important CO2 producer. Boron Active Belite (BA) cement provides high strength, low hydration temperature, reduced CO2 emission, and energy saving in a significant ratio. These are the main factors causing the production of BA cement. The colemanite, which is one of the boron minerals, is used in the production of boron cement. Colemanite ore is mainly rich in CaO, SiO2 and B2O3 contents. Additionally, pozzolanic materials such as fly ash and blast furnace slag are alsoused as additive materials in the cement industry. In this study, mechanical and physical-chemical experiments are carried out on BA cement and Portland composite (PC) cement produced in Göltaş Cement Plant (Isparta, Turkey). The performances of concretes manufactured by using PC (CEM I 42,5R), BA and BA+Blast Furnace Slag (BFS) as binding material are investigated. As a result of the studies performed, the splitting tensile strengths of the mortars with BA+BFS additives are 20% and 48% higher than BA and PC mortars at the end of 180 days of curing, respectively, and the hydration heat is 32% lower than BA and 88% lower than PC.Compared to BA and PC concretes, while BA+BFS additives are reduced the sonic speed time of concretes with BFS is reduced by 22%-39%, while it increased chloride resistance by 65% compared to PC and 85% compared to BA. In addition, as a result of XRD, DTA-TG and SEM analyses, the best results in terms of physicalmechanical properties were obtained in the mixture of BA + 15% BFS.
Volume 48, 2023
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode