Engineering Properties and Correlation Analysis of Fiber Cementitious Materials

Area of Science:

• Materials Science
• Civil Engineering
• Concrete Technology

Background:

• Cementitious materials are foundational in construction.
• Enhancing their engineering properties is crucial for durability and performance.
• Silica fume and steel fibers are known admixtures for improving concrete.

Purpose of the Study:

• To investigate the impact of silica fume and steel fiber content on cementitious material properties.
• To determine the optimal mixture proportions for enhanced engineering characteristics.
• To analyze the relationship between material parameters and mechanical performance.

Main Methods:

• Experimental testing of cementitious materials with varying silica fume (5%, 10%) and steel fiber (0.5%, 1.0%, 2.0%) dosages.
• Evaluation of compressive strength, direct tensile strength, splitting tensile strength, surface abrasion, and drop-weight resistance.
• Statistical analysis using Analysis of Variance (ANOVA) and Pearson correlation coefficient.

Main Results:

• Increased dosages of both silica fume and steel fibers significantly improved splitting tensile strength, direct tensile strength, strain capacity, and crack-arresting ability.
• The optimal mixture identified was 5% silica fume replacement and 2% steel fiber dosage.
• Pearson correlation confirmed the influence of material variables on mechanical properties.

Conclusions:

• Silica fume and steel fibers are effective in enhancing the engineering properties of cementitious materials.
• The study provides an optimal mix design for fiber-reinforced cementitious materials with silica fume.
• Further research can explore long-term durability and performance under various environmental conditions.