A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Green lightweight cementitious composite incorporating aerogels and fly ash cenospheres – Mechanical and thermal insulating properties
Highlights Ultra-lightweight cementitious composite was developed using aerogel and FAC. Both aerogel and FAC significantly reduce the density of resulting composites. Excellent thermal insulation properties and specific strength values are achieved.
Abstract The research focused on the development of an ultra-lightweight cementitious composite with both excellent mechanical and thermal insulating properties. Fly ash cenosphere (FAC), and aerogel, a nano-structured highly porous material made of silica, were used as lightweight aggregates. Polyvinyl alcohol fibers were used to improve the mechanical behavior of the cementitious composite. The experimental results showed higher specific strength (up to 18kPa/kgm−3) of the resulting composites as compared to conventional lightweight materials. Depending on the amount of FAC and aerogel, the compressive and flexural strengths of the cementitious composite were found as 23.54–18.63MPa and 4.94–3.66MPa, respectively, while the thermal conductivity was reduced to 0.3197W/m-K. Moreover, the hydration products and microstructures of the FAC/aerogel modified cementitious composite were investigated by the Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy (EDS). Thermal stability of the hardened matrix was studied by using thermo-gravimetric analyses and it was revealed that the composites were fairly stable at a high temperature range. The weight loss varied with increasing aerogel content. In conclusion, both FAC and aerogel are excellent candidates for producing mechanically strong as well as thermally insulated composites which have great potential to be used in buildings for energy conservation.
Green lightweight cementitious composite incorporating aerogels and fly ash cenospheres – Mechanical and thermal insulating properties
Highlights Ultra-lightweight cementitious composite was developed using aerogel and FAC. Both aerogel and FAC significantly reduce the density of resulting composites. Excellent thermal insulation properties and specific strength values are achieved.
Abstract The research focused on the development of an ultra-lightweight cementitious composite with both excellent mechanical and thermal insulating properties. Fly ash cenosphere (FAC), and aerogel, a nano-structured highly porous material made of silica, were used as lightweight aggregates. Polyvinyl alcohol fibers were used to improve the mechanical behavior of the cementitious composite. The experimental results showed higher specific strength (up to 18kPa/kgm−3) of the resulting composites as compared to conventional lightweight materials. Depending on the amount of FAC and aerogel, the compressive and flexural strengths of the cementitious composite were found as 23.54–18.63MPa and 4.94–3.66MPa, respectively, while the thermal conductivity was reduced to 0.3197W/m-K. Moreover, the hydration products and microstructures of the FAC/aerogel modified cementitious composite were investigated by the Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy (EDS). Thermal stability of the hardened matrix was studied by using thermo-gravimetric analyses and it was revealed that the composites were fairly stable at a high temperature range. The weight loss varied with increasing aerogel content. In conclusion, both FAC and aerogel are excellent candidates for producing mechanically strong as well as thermally insulated composites which have great potential to be used in buildings for energy conservation.
Green lightweight cementitious composite incorporating aerogels and fly ash cenospheres – Mechanical and thermal insulating properties
Hanif, Asad (author) / Diao, Su (author) / Lu, Zeyu (author) / Fan, Tianyuan (author) / Li, Zongjin (author)
Construction and Building Materials ; 116 ; 422-430
2016-04-26
9 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016