期刊
INFRASTRUCTURES
卷 7, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/infrastructures7030026
关键词
agro-industrial waste; bio susceptibility; board; coffee ground; grape press waste; hazelnut shell; insulation; olive pomace; panel; thermal properties
资金
- Portuguese Foundation for Science and Technology (FCT- Fundacao para a Ciencia e a Tecnologia) as part of the Eco-Construction and Rehabilitation Program (EcoCoRe) [PD/BD/150579/2020]
- Fundação para a Ciência e a Tecnologia [PD/BD/150579/2020] Funding Source: FCT
A series of screening tests were conducted to evaluate the feasibility of using agro-industrial wastes as aggregates for eco-efficient building composites. The selected wastes showed poor thermal insulation properties and susceptibility to biological attack. However, the properties of the final products can be altered by adding other materials and pre-treating the wastes.
Screening tests were developed or adapted from RILEM recommendations, standards and past studies, and carried out to characterize some agro-industrial wastes and to assess their feasibility as aggregates for eco-efficient building composites. Spent coffee grounds, grape and olive press waste and hazelnut shells were used, as well as maritime pine chips as control material. Particle size distribution, loose bulk density, thermal conductivity and hygroscopicity properties were analysed. The selected bio-wastes did not show good thermal insulation properties if compared with some bio-wastes already studied and used for thermal insulation composites. Values of loose bulk density and thermal conductivity were between 325.6-550.5 kg/m(3) and 0.078-0.107 W/(m center dot K); moisture buffering values higher than 2.0 g/(m(2)center dot%RH). Biological susceptibility to mould and termites were also tested, using not yet standardized methods. The low resistance to biological attack confirms one of the greatest drawbacks of using bio-wastes for building products. However, final products properties may be changed by adding other materials, pre-treatments of the wastes and the production process.
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