Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of carbonated recycled coarse aggregate on the dynamic compressive behavior of recycled aggregate concrete
HighlightsRecycled coarse aggregate (RCA) was carbonated by an accelerated carbonation method.Dynamic stress-strain curves of RAC with carbonated RCA (CRAC) were studied.The strain-rate sensitivity of CRAC was evaluated and compared with RAC.The mechanism for strain-rate sensitivity of CRAC was explored.
AbstractAdopting accelerated carbonation technique is one of ways to improve the properties of recycled coarse aggregate (RCA). In this study, the uni-axial dynamic compressive behavior of recycled aggregate concrete (RAC) and RAC with carbonated RCA (CRAC) was experimentally investigated when the strain rates were between 10−5/s and 10−1/s. The strain-rate sensitivities of RAC and CRAC were evaluated from the effect of strain rate on stress-strain curve, peak stress, peak strain, ultimate strain, elastic modulus, energy absorption capacity and failure pattern. The results showed that the uni-axial compressive stress-strain curves given in the Chinese code agreed well with the experimental results. As the strain rate was increased, the peak stress, elastic modulus and energy absorption capacity showed an increasing trend for both RAC and CRAC. The peak stress and elastic modulus of CRAC were higher than that of RAC. The strain-rate sensitivity of peak stress and elastic modulus of CRAC was less obvious than that of RAC, which may be explained from Stefan effect and strain-rate sensitivity of crack propagation resistance.
Effect of carbonated recycled coarse aggregate on the dynamic compressive behavior of recycled aggregate concrete
HighlightsRecycled coarse aggregate (RCA) was carbonated by an accelerated carbonation method.Dynamic stress-strain curves of RAC with carbonated RCA (CRAC) were studied.The strain-rate sensitivity of CRAC was evaluated and compared with RAC.The mechanism for strain-rate sensitivity of CRAC was explored.
AbstractAdopting accelerated carbonation technique is one of ways to improve the properties of recycled coarse aggregate (RCA). In this study, the uni-axial dynamic compressive behavior of recycled aggregate concrete (RAC) and RAC with carbonated RCA (CRAC) was experimentally investigated when the strain rates were between 10−5/s and 10−1/s. The strain-rate sensitivities of RAC and CRAC were evaluated from the effect of strain rate on stress-strain curve, peak stress, peak strain, ultimate strain, elastic modulus, energy absorption capacity and failure pattern. The results showed that the uni-axial compressive stress-strain curves given in the Chinese code agreed well with the experimental results. As the strain rate was increased, the peak stress, elastic modulus and energy absorption capacity showed an increasing trend for both RAC and CRAC. The peak stress and elastic modulus of CRAC were higher than that of RAC. The strain-rate sensitivity of peak stress and elastic modulus of CRAC was less obvious than that of RAC, which may be explained from Stefan effect and strain-rate sensitivity of crack propagation resistance.
Effect of carbonated recycled coarse aggregate on the dynamic compressive behavior of recycled aggregate concrete
Li, Long (Autor:in) / Poon, Chi Sun (Autor:in) / Xiao, Jianzhuang (Autor:in) / Xuan, Dongxing (Autor:in)
Construction and Building Materials ; 151 ; 52-62
08.06.2017
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017
| British Library Online Contents | 2017
| British Library Online Contents | 2018