Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Long term durability properties of class F fly ash geopolymer concrete
Abstract The environmental impact from the production of cement has prompted research into the development of concretes using 100 % replacement materials activated by alkali solutions. This paper reports the assessment of a number of key durability parameters for geopolymer concrete made from fly ash activated with sodium silicate and sodium hydroxide. Properties investigated have included workability, compressive strength, water sorptivity, carbonation, chloride diffusion and rapid chloride permeability. Microstructure studies have been conducted using scanning electron microscopy and energy dispersive X-ray spectroscopy. The results showed that both the geopolymer concretes with activator modulus 1.00 and 1.25 gave durability parameters comparable to Ordinary Portland and blended cement concretes of similar strength, while the geopolymer concrete with an activator modulus of 0.75 displayed lower durability performance. However, there is a concern over the long term performance of the geopolymer concretes with activator modulus of 1.00 and 1.25 when considering chloride induced corrosion of reinforcing steel due to the initial pH and long term chloride diffusion coefficient.
Long term durability properties of class F fly ash geopolymer concrete
Abstract The environmental impact from the production of cement has prompted research into the development of concretes using 100 % replacement materials activated by alkali solutions. This paper reports the assessment of a number of key durability parameters for geopolymer concrete made from fly ash activated with sodium silicate and sodium hydroxide. Properties investigated have included workability, compressive strength, water sorptivity, carbonation, chloride diffusion and rapid chloride permeability. Microstructure studies have been conducted using scanning electron microscopy and energy dispersive X-ray spectroscopy. The results showed that both the geopolymer concretes with activator modulus 1.00 and 1.25 gave durability parameters comparable to Ordinary Portland and blended cement concretes of similar strength, while the geopolymer concrete with an activator modulus of 0.75 displayed lower durability performance. However, there is a concern over the long term performance of the geopolymer concretes with activator modulus of 1.00 and 1.25 when considering chloride induced corrosion of reinforcing steel due to the initial pH and long term chloride diffusion coefficient.
Long term durability properties of class F fly ash geopolymer concrete
Law, David W. (Autor:in) / Adam, Andi Arham (Autor:in) / Molyneaux, Thomas K. (Autor:in) / Patnaikuni, Indubhushan (Autor:in) / Wardhono, Arie (Autor:in)
Materials and Structures ; 48 ; 721-731
19.02.2014
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Long term durability properties of class F fly ash geopolymer concrete
| Online Contents | 2014
Long term durability properties of class F fly ash geopolymer concrete
| Online Contents | 2015
Long term durability properties of class F fly ash geopolymer concrete
| British Library Online Contents | 2015
Long term durability properties of class F fly ash geopolymer concrete
| Online Contents | 2014
Evaluation of non-destructive testing and long-term durability of geopolymer aggregate concrete
| DOAJ | 2024