A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Frost Resistance of Thermoinsulating Recycled-Aggregate Concretes Containing Glazed Hollow Beads
Glazed hollow bead (GHB) is an innovative material that gives concrete very good thermal-insulation properties and improves concrete frost resistance, when used as a partial replacement of ordinary fine aggregate. The improvement in frost resistance under freeze-thaw cycles and the deterioration mechanisms of recycled aggregate thermoinsulating concretes (RATICs) is the objective of this study, after adding GHBs to the mix. Fifteen cubes and ninety prisms made of five RATIC mixes (GHB content = 0, 40, 65, 90 and 130 kg/m3) were tested in compression, to identify the optimum content of GHB. The degradation mechanisms of RATIC were identified based on mass loss, dynamic elastic modulus and uniaxial compressive strength. In addition, RATIC mesostructure was investigated by means of Computed Tomography Scanning, and the deterioration mechanisms by analyzing pore amount, average and maximum pore area and porosity. The experimental results demonstrate that adding glazed hollow beads to recycled aggregate concrete (RAC) moderately changes the mesostructure of the concrete, to the advantage of frost resistance, and that the optimum content of GHB is around 90 kg/m3.
Frost Resistance of Thermoinsulating Recycled-Aggregate Concretes Containing Glazed Hollow Beads
Glazed hollow bead (GHB) is an innovative material that gives concrete very good thermal-insulation properties and improves concrete frost resistance, when used as a partial replacement of ordinary fine aggregate. The improvement in frost resistance under freeze-thaw cycles and the deterioration mechanisms of recycled aggregate thermoinsulating concretes (RATICs) is the objective of this study, after adding GHBs to the mix. Fifteen cubes and ninety prisms made of five RATIC mixes (GHB content = 0, 40, 65, 90 and 130 kg/m3) were tested in compression, to identify the optimum content of GHB. The degradation mechanisms of RATIC were identified based on mass loss, dynamic elastic modulus and uniaxial compressive strength. In addition, RATIC mesostructure was investigated by means of Computed Tomography Scanning, and the deterioration mechanisms by analyzing pore amount, average and maximum pore area and porosity. The experimental results demonstrate that adding glazed hollow beads to recycled aggregate concrete (RAC) moderately changes the mesostructure of the concrete, to the advantage of frost resistance, and that the optimum content of GHB is around 90 kg/m3.
Frost Resistance of Thermoinsulating Recycled-Aggregate Concretes Containing Glazed Hollow Beads
KSCE J Civ Eng
Wang, Zhaoxu (author) / Liu, Yuanzhen (author) / Guo, Yaodong (author) / Zhao, Yu (author) / Hao, Lucen (author)
KSCE Journal of Civil Engineering ; 25 ; 621-630
2021-02-01
10 pages
Article (Journal)
Electronic Resource
English
| Springer Verlag | 2015
| British Library Online Contents | 2017
Frost resistance of recycled aggregate concrete
| Tema Archive | 2004
Frost resistance of recycled aggregate concrete
| Online Contents | 2004
Frost resistance of recycled aggregate concrete
| British Library Online Contents | 2004