Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of early-age thermal microcracking on material properties and structural performance of limestone aggregate concrete
https://orcid.org/0000-0003-3260-5496
Abstract High temperature or thermal curing is commonly applied to concrete fabrication but raises concerns for potential microcracks caused by temperature changes. This is particularly concerning for concrete using limestone coarse aggregate given the significant mismatch in thermal deformation between the aggregate and the surrounding mortar. This experimental study aimed to compare the effects of early-age thermal curing on limestone and normal concrete and included relevant tests on samples cured with either normal, or high temperature conditions. Alongside concrete specimens for microcrack observation and material property measurement, reinforced concrete beams were prepared to investigate shear behavior. It was concluded that high temperature at an early age could cause adverse impacts on basic properties of limestone concrete. However, the structural behavior was also enhanced, manifested by fracture properties and shear resistance improvements. These improvements were attributed to the microcracks’ influences on macrocracks, and to the improved shear transmission through cracks.
Effects of early-age thermal microcracking on material properties and structural performance of limestone aggregate concrete
https://orcid.org/0000-0003-3260-5496
Abstract High temperature or thermal curing is commonly applied to concrete fabrication but raises concerns for potential microcracks caused by temperature changes. This is particularly concerning for concrete using limestone coarse aggregate given the significant mismatch in thermal deformation between the aggregate and the surrounding mortar. This experimental study aimed to compare the effects of early-age thermal curing on limestone and normal concrete and included relevant tests on samples cured with either normal, or high temperature conditions. Alongside concrete specimens for microcrack observation and material property measurement, reinforced concrete beams were prepared to investigate shear behavior. It was concluded that high temperature at an early age could cause adverse impacts on basic properties of limestone concrete. However, the structural behavior was also enhanced, manifested by fracture properties and shear resistance improvements. These improvements were attributed to the microcracks’ influences on macrocracks, and to the improved shear transmission through cracks.
Effects of early-age thermal microcracking on material properties and structural performance of limestone aggregate concrete
https://orcid.org/0000-0003-3260-5496
Abstract High temperature or thermal curing is commonly applied to concrete fabrication but raises concerns for potential microcracks caused by temperature changes. This is particularly concerning for concrete using limestone coarse aggregate given the significant mismatch in thermal deformation between the aggregate and the surrounding mortar. This experimental study aimed to compare the effects of early-age thermal curing on limestone and normal concrete and included relevant tests on samples cured with either normal, or high temperature conditions. Alongside concrete specimens for microcrack observation and material property measurement, reinforced concrete beams were prepared to investigate shear behavior. It was concluded that high temperature at an early age could cause adverse impacts on basic properties of limestone concrete. However, the structural behavior was also enhanced, manifested by fracture properties and shear resistance improvements. These improvements were attributed to the microcracks’ influences on macrocracks, and to the improved shear transmission through cracks.
Effects of early-age thermal microcracking on material properties and structural performance of limestone aggregate concrete
Bui, Do Cong (Autor:in) / Nakarai, Kenichiro (Autor:in) / Nishikawa, Hiroki (Autor:in)
16.09.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Early-age high temperature curing , Coefficient of thermal expansion , Microcracking , Shear strength , Limestone coarse aggregate , AE , Acoustic emission , CMOD , crack mouth opening displacement , CTE , coefficient of thermal expansion , FEIM , fluorescent epoxy impregnation method , ITZ , interfacial transition zone , JIS , Japanese Industrial Standard , LVDT , Linear variable differential transducer , RC , reinforced concrete
The effects of limestone aggregate on concrete properties
| Online Contents | 2010
The effects of limestone aggregate on concrete properties
| British Library Online Contents | 2010
The effects of limestone aggregate on concrete properties
| Elsevier | 2010