PSI - Issue 70

R. Mohanraj et al. / Procedia Structural Integrity 70 (2025) 401–408

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Fig. 1 Test results of the compression test

Fig. 2. Sorptivity test results

4.2 Sorptivity Analysis

The study evaluates the water absorption characteristics of concrete samples incorporating varying percentages of nano-SiO 2 particles (1% to 5%) over 300 minutes. Fig. 2 depicts that all samples displayed an increase in weight due to water absorption, with the reference mix (0% nano-SiO 2 ) recording the highest uptake. At 0 minutes, the average weight for the reference was 0.403 g, while nano-SiO2 mixes showed decreasing initial weights with increasing dosage — nano-SiO 2 4% having the lowest at 0.361 g. Over time, weight gain was observed in all mixes, but the