Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design and performance evaluation of ultra-lightweight geopolymer concrete
This article presents the development of a sustainable ultra-lightweight geopolymer concrete (with a dry density = 800 kg/m3) for both thermal insulating and load bearing purposes. A predesigned mineral precursor resulted from industrial by-products is used as the raw material for alkali activation and NaOH with a low concentration of 2–3 M is used as the alkali activator, together with a specially designed additive as superplasticizer. The ultra-lightweight property is achieved by applying a waste glass produced expanded lightweight material as aggregates. The effects of influential parameters including the design approach, liquid/binder ratio, binder/aggregate ratio, particle size and air entraining agent on the properties of the designed concrete are evaluated. An ultra-lightweight concrete with a proper workability is obtained and the hardened concrete shows excellence performances in terms of mechanical property, thermal property and durability. At a moderate compressive strength (10 MPa), an excellent thermal conductivity of 0.11 W/(m·K) is resulted. Furthermore, a very low thermal conductivity of 0.07 W/(m·K) is reached at a compressive strength of 8 MPa, indicating great potential for the production of a load bearing and highly insulating building material as an alternative for the traditional materials.
Design and performance evaluation of ultra-lightweight geopolymer concrete
This article presents the development of a sustainable ultra-lightweight geopolymer concrete (with a dry density = 800 kg/m3) for both thermal insulating and load bearing purposes. A predesigned mineral precursor resulted from industrial by-products is used as the raw material for alkali activation and NaOH with a low concentration of 2–3 M is used as the alkali activator, together with a specially designed additive as superplasticizer. The ultra-lightweight property is achieved by applying a waste glass produced expanded lightweight material as aggregates. The effects of influential parameters including the design approach, liquid/binder ratio, binder/aggregate ratio, particle size and air entraining agent on the properties of the designed concrete are evaluated. An ultra-lightweight concrete with a proper workability is obtained and the hardened concrete shows excellence performances in terms of mechanical property, thermal property and durability. At a moderate compressive strength (10 MPa), an excellent thermal conductivity of 0.11 W/(m·K) is resulted. Furthermore, a very low thermal conductivity of 0.07 W/(m·K) is reached at a compressive strength of 8 MPa, indicating great potential for the production of a load bearing and highly insulating building material as an alternative for the traditional materials.
Design and performance evaluation of ultra-lightweight geopolymer concrete
Huiskes, D.M.A. (Autor:in) / Keulen, A. (Autor:in) / Yu, Q.L. (Autor:in) / Brouwers, H.J.H. (Autor:in)
05.01.2016
Huiskes , D M A , Keulen , A , Yu , Q L & Brouwers , H J H 2016 , ' Design and performance evaluation of ultra-lightweight geopolymer concrete ' , Materials & Design , vol. 89 , pp. 516-526 . https://doi.org/10.1016/j.matdes.2015.09.167
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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