Abstract
Abstract This study is aimed at the application of alternative binder (AB) into bio-aggregate-based composite. The technically important parameters (density, thermal conductivity, water absorption and compressive strength) of 28, 60 and 90 days hardened green composites containing chemically and physico-chemically modified hemp hurds (HH) with AB compared to the Portland cement (PC) are presented. Testing of two reference bio-composites with original HH confirmed higher values of compressive strength and thermal conductivity unlike water absorption for all hardened specimens based on alternative binder (MgO-cement) compared to conventional PC. Changes in the final properties of hardened bio-composites were affected by treatment process of organic filler and alkaline nature of MgO-cement. The combination of purified HH by ultrasound treatment and AB appears to be promising for preparation of bio-based composite material with better properties compared to PC. In this paper, other option of the preparation of bio-composite system based on original (non-treated) filler and binder consisting of optimal activated MgO and silica fume is presented.
Highlights
Bio-composites based on lignocellulose aggregates with inorganic matrix belong to popular building products due to the advantageous and useful physical and chemical properties of their biopolymer constituents
The development of thermal conductivity coefficient, short-term water absorption and compressive strength of bio-aggregate composites with Portland cement (PC) and alternative binder (AB) matrix in dependence on hardening time is shown in Figs. 1 - 3
It is evident that physical treatment of hemp hurds in alkaline solution (UATHH) has the most favorable effect on this parameter of bio-composite in comparison to other composite samples based on MgOcement
Summary
Bio-composites based on lignocellulose aggregates with inorganic matrix belong to popular building products due to the advantageous and useful physical and chemical properties of their biopolymer constituents These lignocellulose materials obtained from plant raw materials attract an incredible level of attention to use them in the production of environmentally friendly materials with high utility value from the point of view of construction sustainability. Their porous structure motivated eco-builders for the exploitation of natural lignocellulose sources and recyclable bio-waste as filler constituents into green composites, and in the design and development of new bio-based materials with fascinating ability to regulate the indoor moisture level and to ensure better indoor air quality [1]. Hemp hurds (HH) as waste product coming from fibre production usually ending up in landfills [3] is utilised mainly for production of bio-based composites [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
