期刊
MATERIALS & DESIGN
卷 89, 期 -, 页码 516-526出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.09.167
关键词
Ultra-lightweight concrete; Industrial by-products; Geopolymer; Compressive strength; Thermal conductivity; Water permeability
资金
- Van Gansewinkel Minerals, The Netherlands
- Cementbouw Mineralen, The Netherlands
- SQAPE Geopolymer Technology, The Netherlands
- Rijkswaterstaat Grote Projecten en Onderhoud
- Graniet-Import Benelux
- Kijlstra Betonmortel
- Struyk Verwo
- Attero
- Enci
- Rijkswaterstaat Zee en Delta-District Noord
- Van Gansewinkel Minerals
- BTE
- V.d. Bosch Beton
- Selor
- GMB
- Geochem Research
- Icopal
- BN International
- Eltomation
- Knauf Gips
- Knauf insulation
- Hess AAC Systems
- Kronos
- Joma
- CRH Europe Sustainable Concrete Centre
- Cement Beton Centrum
- Heros and Inashco
This article presents the development of a sustainable ultra-lightweight geopolymer concrete (with a dry density <= 800 kg/m(3)) 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 Misused 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. (C) 2015 Elsevier Ltd. All rights reserved.
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