Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Deicing Salts and Durability of Concrete Pavements and Joints
ProQuest: ... denotes formula omitted.) Over the last decade, research into the development of damage due to calcium oxychloride formation has moved from identification of the source of the reaction7,18 to testing the hypothesis that removal of Ca(OH)2 significantly reduces the potential for damage to occur.19 Research has been performed to identify the temperature and salt-calcium hydroxide molar ratio ranges in which calcium oxychloride can form.8 Acoustic emission tests of mortars showed that samples saturated with solutions stronger than approximately 15% (by mass) of MgCl2 or CaCl2 cracked and were damaged at room temperature without freezing and thawing.6,8 Additionally, test methods were developed to quantify the amount of calcium oxychloride17,19,20 that can form, and approaches to mitigate the formation have been identified. The following topics are discussed: * The reaction that occurs between the salt and cement that causes damage)-for relatively high salt concentrations and temperatures above freezing; * The use of three tests to quantify the potential for damage- formation for a given cementitious matrix, TGA to quantify the amount of Ca(OH)2; and LGCC to quantify damage due to freezing and calcium oxychloride formation; * Three approaches that could be implemented to minimize Ca(OH)2 content through dilution and pozzolanic reaction, using carbonation to reduce the availability of Ca(OH)2, and using topical treatments to provide a physical separation between applied deicing salts and Ca(OH)2 in the matrix; and * The use of a thermodynamic model, based on fundamental with calcium hydroxide formation and the resulting calcium oxychloride formation.
Deicing Salts and Durability of Concrete Pavements and Joints
ProQuest: ... denotes formula omitted.) Over the last decade, research into the development of damage due to calcium oxychloride formation has moved from identification of the source of the reaction7,18 to testing the hypothesis that removal of Ca(OH)2 significantly reduces the potential for damage to occur.19 Research has been performed to identify the temperature and salt-calcium hydroxide molar ratio ranges in which calcium oxychloride can form.8 Acoustic emission tests of mortars showed that samples saturated with solutions stronger than approximately 15% (by mass) of MgCl2 or CaCl2 cracked and were damaged at room temperature without freezing and thawing.6,8 Additionally, test methods were developed to quantify the amount of calcium oxychloride17,19,20 that can form, and approaches to mitigate the formation have been identified. The following topics are discussed: * The reaction that occurs between the salt and cement that causes damage)-for relatively high salt concentrations and temperatures above freezing; * The use of three tests to quantify the potential for damage- formation for a given cementitious matrix, TGA to quantify the amount of Ca(OH)2; and LGCC to quantify damage due to freezing and calcium oxychloride formation; * Three approaches that could be implemented to minimize Ca(OH)2 content through dilution and pozzolanic reaction, using carbonation to reduce the availability of Ca(OH)2, and using topical treatments to provide a physical separation between applied deicing salts and Ca(OH)2 in the matrix; and * The use of a thermodynamic model, based on fundamental with calcium hydroxide formation and the resulting calcium oxychloride formation.
Deicing Salts and Durability of Concrete Pavements and Joints
Prannoy Suraneni (Autor:in) / Vahid Jafari Azad / O Burkan Isgor / W Jason Weiss
2016
Aufsatz (Zeitschrift)
Englisch
Durability of Concrete Structures Exposed to CaCl~2 Based Deicing Salts
| British Library Conference Proceedings | 1994
Durability of high performance concrete in cold climate and exposure to deicing salts
| British Library Conference Proceedings | 2010
Engineering Index Backfile | 1935