Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impact of Coarse Aggregate Mineralogy on Coefficient of Thermal Expansion of Paving Concrete in New Mexico
Coefficient of thermal expansion (CTE) of concrete is a very important parameter in rigid pavement design and analysis because the magnitudes of temperature related distresses are directly proportional to this value during early ages as well as during the pavement design life. With the advent of pavement mechanistic empirical (ME) design procedure, more emphasis is being laid on accurate determination of CTE of paving mixes for accurate design. Coarse aggregate being the major constituent of concrete affects the CTE of resultant concrete. With prior research, it has been established that coarse aggregate mineralogy has a significant impact on the CTE of concrete. This study focuses on the experimental evaluation of CTE according to AASHTO T336 test protocol, for various paving mixes being used in New Mexico cast with coarse aggregates having different mineralogy. The laboratory results were analyzed and it was confirmed that CTE of concrete varies with change in coarse aggregate mineralogy. The CTE of these paving mixes varies over a broad range of 3.71 to 5.40 micro strain/°F. These CTE results were compared with the ME design default database and significant difference was found between the two, which may result in inaccurate pavement design. It was also confirmed with design simulations conducted in Pavement ME Design software version 2.3 that CTE variation affects the pavement performance in a significant manner.
Impact of Coarse Aggregate Mineralogy on Coefficient of Thermal Expansion of Paving Concrete in New Mexico
Coefficient of thermal expansion (CTE) of concrete is a very important parameter in rigid pavement design and analysis because the magnitudes of temperature related distresses are directly proportional to this value during early ages as well as during the pavement design life. With the advent of pavement mechanistic empirical (ME) design procedure, more emphasis is being laid on accurate determination of CTE of paving mixes for accurate design. Coarse aggregate being the major constituent of concrete affects the CTE of resultant concrete. With prior research, it has been established that coarse aggregate mineralogy has a significant impact on the CTE of concrete. This study focuses on the experimental evaluation of CTE according to AASHTO T336 test protocol, for various paving mixes being used in New Mexico cast with coarse aggregates having different mineralogy. The laboratory results were analyzed and it was confirmed that CTE of concrete varies with change in coarse aggregate mineralogy. The CTE of these paving mixes varies over a broad range of 3.71 to 5.40 micro strain/°F. These CTE results were compared with the ME design default database and significant difference was found between the two, which may result in inaccurate pavement design. It was also confirmed with design simulations conducted in Pavement ME Design software version 2.3 that CTE variation affects the pavement performance in a significant manner.
Impact of Coarse Aggregate Mineralogy on Coefficient of Thermal Expansion of Paving Concrete in New Mexico
Sabih, Gauhar (Autor:in) / Tarefder, Rafiqul A. (Autor:in)
International Conference on Transportation and Development 2018 ; 2018 ; Pittsburgh, Pennsylvania
12.07.2018
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Porous Concrete Paving Blocks Using Coarse Aggregate
| British Library Conference Proceedings | 2014
Porous Concrete Paving Blocks Using Coarse Aggregate
| Trans Tech Publications | 2014
Multiple sizes of coarse aggregate in concrete paving
| Engineering Index Backfile | 1932