The effects of aggregate volume fraction on the void ratio and the elastic modulus of mortar were studied. Cylindrical specimens with six volume fractions (a/t = 0., 0.05, 0.1, 0.2, 0.3, and 0.4) of fine aggregate and various water/cement ratios (w/c = 0.3, 0.4, and 0.5) were cast and tested. Double inclusion model for three-phase composite (matrix, aggregate, and void) was used to predict the volume of total void based on the properties and quantities of the components and composites. Based on this study, when higher volume fraction of aggregate is used in the mix, the elastic modulus of the composite should be computed by introducing a third phase (void) into the composite. For the mix with lower volume fraction of aggregate, because the volume of void is relatively small in comparison with the volume of other components, two-phase approach is appropriate for evaluating the elastic moduli of the composites.
Cho, Shih-Wei; Yang, Chung-Chia; and Huang, Ran
"Effect of Aggregate Volume Fraction on the Elastic Moduli and Void Ratio of Cement-Based,"
Journal of Marine Science and Technology: Vol. 8:
1, Article 1.
Available at: https://jmstt.ntou.edu.tw/journal/vol8/iss1/1