Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Physical and Mechanical Effects of Silica Sand in Cement Mortars: Experimental and Statistical Modeling
oleh: Abdellah Douadi, Kamel Hebbache, Mourad Boutlikht, Seifeddine Tabchouche, Cherif Belebchouche, Redha Hammouche, Giulia Del Serrone, Laura Moretti
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2023-10-01 |
Deskripsi
The environmental impacts of cement manufacturing are becoming a real-time issue that requires attention. This paper investigates the mechanical and physical properties of mortars with finely ground sand as a substitute for cement. The experimental program consisted of three silica sands with a Blaine Specific Surface (BSS) area of 459 m<sup>2</sup>/kg, 497 m<sup>2</sup>/kg, and 543 m<sup>2</sup>/kg and four substitution ratios of 10%, 20%, 30%, and 40%. A total of 12 mixtures have been prepared and tested for comparison to the reference mortar. The pozzolanic effect of the sand was evaluated using thermogravimetric analysis (TGA). The results revealed that the fineness variation from 459 m<sup>2</sup>/kg to 543 m<sup>2</sup>/kg resulted in an increase of 20% and 30% in water absorption and compressive strength, respectively. However, increasing the substitution ratio from 10% to 40% led to a 40% decrease in mechanical strength and a 25% increase in water absorption. The statistical analysis of the results demonstrated that both factors under study influenced compressive strength and water absorption. The ANalysis of VAriance (ANOVA) confirmed that the proposed regression equations predict the experimental results. Further studies will investigate both the technical and environmental performances of cement mortars with finely ground silica sand.