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Properties of portland cement-silica fume pastes II. Mechanical properties
AbstractCompressive strength, Young's modulus, and microhardness are measured as a function of porosity for pastes of silica fume-cement blends made with silica fume contents of 0, 10 and 30 per cent at w/(c+sf) ratios of 0.25 and 0.45. Porosities are lower for pastes without silica fume addition, but strengths are greater at w/ (c+sf) of 0.25 at 180 days curing. At a w/(c+sf) of 0.45, however, strengths are marginally greater with large additions of silica fume. Modulus of elasticity is greater without addition. It is shown that silica fume addition at a w/(c+sf) of 0.45 results in a relatively low Eo but high So. This is due to a combination of low-density dispersed hydrate of low CaO/SiO2 and low Ca(OH)2 content, leading to a relatively homogeneous composite. Correlations between log mechanical property and non-evaporable water content are good for all specimens, with and without silica fume.
Properties of portland cement-silica fume pastes II. Mechanical properties
AbstractCompressive strength, Young's modulus, and microhardness are measured as a function of porosity for pastes of silica fume-cement blends made with silica fume contents of 0, 10 and 30 per cent at w/(c+sf) ratios of 0.25 and 0.45. Porosities are lower for pastes without silica fume addition, but strengths are greater at w/ (c+sf) of 0.25 at 180 days curing. At a w/(c+sf) of 0.45, however, strengths are marginally greater with large additions of silica fume. Modulus of elasticity is greater without addition. It is shown that silica fume addition at a w/(c+sf) of 0.45 results in a relatively low Eo but high So. This is due to a combination of low-density dispersed hydrate of low CaO/SiO2 and low Ca(OH)2 content, leading to a relatively homogeneous composite. Correlations between log mechanical property and non-evaporable water content are good for all specimens, with and without silica fume.
Properties of portland cement-silica fume pastes II. Mechanical properties
Feldman, R.F. (author) / Cheng-yi, Huang (author)
Cement and Concrete Research ; 15 ; 943-952
1985-01-11
10 pages
Article (Journal)
Electronic Resource
English
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