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A platform for research: civil engineering, architecture and urbanism
Pressed lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate
Highlights We studied lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete block aggregate. Incorporation of OPC and temperature curing enhanced strength development. The use of OPC enhanced strength development with a slight increase in density. Density of 1200–1500kg/m3 and compressive strength of 4.5–17.5MPa were obtained.
Abstract In this paper, the density and strength of lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate (RLCA) were studied. Waste lightweight concrete was crushed and used as lightweight aggregate. Geopolymer cement was produced from the blend of high calcium fly ash and ordinary Portland cement (OPC), sodium hydroxide and sodium silicate. The fly ash was replaced with OPC at the dosages of 0, 5, 10 and 15% by weight. The results showed that lightweight geopolymer concretes with densities between 1200 and 1500kg/m3 and 28-day compressive strengths between 4.5 and 17.5MPa could be fabricated. The incorporation of RLCA reduced both density and strength of lightweight concrete. The addition of OPC enhanced the strength development of geopolymer concrete but also increased the density. The optimum OPC content for strength development was 10%. The NaOH concentration of 10M, sodium silicate/NaOH ratio of 1.0, OPC content of 10% by weight of fly ash, liquid/solid binder ratio of 1.4, RLCA/solid binder ratio of 1.8 and curing temperature of 60°C were recommended for the lightweight fly ash-OPC geopolymer concrete.
Pressed lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate
Highlights We studied lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete block aggregate. Incorporation of OPC and temperature curing enhanced strength development. The use of OPC enhanced strength development with a slight increase in density. Density of 1200–1500kg/m3 and compressive strength of 4.5–17.5MPa were obtained.
Abstract In this paper, the density and strength of lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate (RLCA) were studied. Waste lightweight concrete was crushed and used as lightweight aggregate. Geopolymer cement was produced from the blend of high calcium fly ash and ordinary Portland cement (OPC), sodium hydroxide and sodium silicate. The fly ash was replaced with OPC at the dosages of 0, 5, 10 and 15% by weight. The results showed that lightweight geopolymer concretes with densities between 1200 and 1500kg/m3 and 28-day compressive strengths between 4.5 and 17.5MPa could be fabricated. The incorporation of RLCA reduced both density and strength of lightweight concrete. The addition of OPC enhanced the strength development of geopolymer concrete but also increased the density. The optimum OPC content for strength development was 10%. The NaOH concentration of 10M, sodium silicate/NaOH ratio of 1.0, OPC content of 10% by weight of fly ash, liquid/solid binder ratio of 1.4, RLCA/solid binder ratio of 1.8 and curing temperature of 60°C were recommended for the lightweight fly ash-OPC geopolymer concrete.
Pressed lightweight fly ash-OPC geopolymer concrete containing recycled lightweight concrete aggregate
Posi, Patcharapol (author) / Thongjapo, Pearploy (author) / Thamultree, Natakorn (author) / Boontee, Phongsathon (author) / Kasemsiri, Pornnapa (author) / Chindaprasirt, Prinya (author)
Construction and Building Materials ; 127 ; 450-456
2016-09-26
7 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016