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Research
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Alkali-Silica
Reaction
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From Wang et al. Cement and Concrete Research, V27 N12:1899, (1997). |
Surface chemistry |
| We have proposed a model based on Gouy-Chapman double layer theory to explain the expansion caused by alkali-silica reaction in concrete. According to the theory, ions with a larger valence will result in a thinner double layer, causing comparatively smaller gel expansion. This suggests that the greater the concentration of calcium species, relative to monovalent sodium and potassium species, the smaller the expansion in concrete. | |
| Publications
M. Prezzi, P.J.M. Monteiro, and G. Sposito, Alkali-Silica Reaction - Part 1: Use of the Double-Layer Theory to Explain the Behavior of the Reaction Product Gels , ACI Journal, V94 , 10, (1997). M. Prezzi, P.J.M. Monteiro, and G. Sposito, Alkali-Silica Reaction - Part 2: The Effect of Chemical Additives , ACI Journal JAN-FEB, V95 N1:3-10, (1998). F. A. Rodrigues, P.J.M. Monteiro, and G. Sposito, Surface Charge Density of Silica In Water-Acetone Mixtures, , Journal of Colloid and Interface Science Vol 211, 408 (1999). F. A. Rodrigues, P.J.M. Monteiro, and G. Sposito, The Alkali-Aggregate Reaction: The Surface Charge Density of Silica and Its Effect on the Expansive Pressure , CCR journal, Vol. 29, 527, (1999). F. A. Rodrigues, P.J.M. Monteiro, and G. Sposito, The Alkali-silica Reaction: The Effect Of Monovalent And Bivalent Cations On The Surface Charge Of Opal, Cement and Concrete Research, V31, 1549-1552, 2001.
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