A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Neutron Radiography Measurement of Salt Solution Absorption in Mortar
Some concrete pavements in the United States have recently exhibited premature joint deterioration. It is hypothesized that one component of this damage can be attributed to a reaction that occurs when salt-laden water is absorbed in the concrete and reacts with the matrix. This study examines the absorption of CaCl^sub 2^ solution in mortar via neutron imaging. Mortar specimens were prepared with water-cement ratios (w/c) of 0.36, 0.42, and 0.50 by mass and exposed to chloride solutions with concentrations ranging from 0% to 29.8% by mass. Depth of fluid penetration and moisture content along the specimen length were determined for 96 hours after exposure. At high salt concentration (29.8%), the sorption rate decreased by over 80% in all samples. Along with changes in surface tension and viscosity, CaCl^sub 2^ reacted with the cement paste to produce products (Friedel's salt, Kuzel's salt, or calcium oxychloride) that block pores and reduce absorption.
Neutron Radiography Measurement of Salt Solution Absorption in Mortar
Some concrete pavements in the United States have recently exhibited premature joint deterioration. It is hypothesized that one component of this damage can be attributed to a reaction that occurs when salt-laden water is absorbed in the concrete and reacts with the matrix. This study examines the absorption of CaCl^sub 2^ solution in mortar via neutron imaging. Mortar specimens were prepared with water-cement ratios (w/c) of 0.36, 0.42, and 0.50 by mass and exposed to chloride solutions with concentrations ranging from 0% to 29.8% by mass. Depth of fluid penetration and moisture content along the specimen length were determined for 96 hours after exposure. At high salt concentration (29.8%), the sorption rate decreased by over 80% in all samples. Along with changes in surface tension and viscosity, CaCl^sub 2^ reacted with the cement paste to produce products (Friedel's salt, Kuzel's salt, or calcium oxychloride) that block pores and reduce absorption.
Neutron Radiography Measurement of Salt Solution Absorption in Mortar
Lucero, Catherine L (author) / Spragg, Robert P / Bentz, Dale P / Hussey, Daniel S / Jacobson, David L / Weiss, W. Jason
ACI materials journal ; 114
2016
Article (Journal)
English
Neutron Radiography Measurement of Salt Solution Absorption in Mortar
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Using neutron radiography to assess water absorption in air entrained mortar
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| British Library Online Contents | 2016