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The Effect of Nano Silica on Porosity and Strength

Alshammari, Saleh Majed
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544644895468858

Abstract Details

2018, Master of Science (M.S.), University of Dayton, Civil Engineering.
This research investigates the effect of nano-SiO2 on porosity and strength. In both compressive strength and porosity tests, nano-SiO2 is varied from 0 to 3% (0%, 0.5%, 1%, 2%, 3%) with the fixed percentage of silica fume at 0.4%. In addition to these tests, a base test was performed that did not include SF or nano-SiO2. However, for the flexural test, only the 0% and 1% of nano-SiO2 are tested (1% is the optimal percentage for the porosity test). Also, one specimen, which does not include either SF or nano-SiO2, is tested. Results show compressive strength increases with the increase of nano-SiO2, but this increase stops after reaching 2%. Porosity decreases when the nano-SiO2 percent increases. However, such a decrease stops after reaching 1%. An increase of 0.5% of nano-SiO2 contributes to reducing the porosity by 40%, compared to a specimen that has 4% of silica fume and 0% of nano-SiO2. However, an increase of 1% of nano-SiO2 contributes to reducing the porosity by only 2.4% because nano-SiO2 particles are more beneficial on the surface layer. Consequently, most of the nano-SiO2 particles that are in the core layers are redundant because the surface layer decreases the porosity sufficiently. The flexural strength seems to increase with the increasing percentage of nano-SiO2, compared to 4% of silica fume and 0% of the nano-SiO2 specimen.
Joseph Saliba (Committee Chair)
Riad Alakkas (Committee Member)
Ben Weghe (Committee Member)
45 p.
Civil Engineering; Nanotechnology
Nano silica in Concrete; Nano Silicon Oxide in Concrete; The effect of nano silica on porosity and strength; Improve concrete porosity and strength by using Nano SiO2; the effective of Nanomaterials in Concrete porosity; nanomaterials

Recommended Citations

Citations

  • Alshammari, S. M. (2018). The Effect of Nano Silica on Porosity and Strength [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544644895468858

    APA Style (7th edition)

  • Alshammari, Saleh . The Effect of Nano Silica on Porosity and Strength . 2018. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544644895468858.

    MLA Style (8th edition)

  • Alshammari, Saleh . "The Effect of Nano Silica on Porosity and Strength ." Master's thesis, University of Dayton, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544644895468858

    Chicago Manual of Style (17th edition)

dayton1544644895468858
1,964
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This open access ETD is published by University of Dayton and OhioLINK.