Abstract
A novel application for mineral-filled composites with a bio-based polyurethane resin (BPR) binder was previously proposed to reduce the construction industry's carbon footprint. However, more details over the binder degradation conditions are necessary to clarify the composite usage in new sustainable building materials. Therefore, this work analyzed a castor oil-based polyurethane binder by its physical indexes (NBR 15845), mechanical properties (ASTM D 695), alterability by chemical reagents (ASTM D 543), humid atmosphere attack (NBR 8095), UV-rays exposure (ASTM G 53), thermogravimetry (TG/DTG), and differential scanning calorimetry (DSC). Besides, specimens of vermiculite/BPR composite were produced to evaluate the binder performance. BPR proved to be lightweight (1.19 g.cm−3) with a near-zero apparent porosity and water absorption. BPR was resistant to weathering action, while a slight variation in elastic modulus was detected during chemical attack. A thermal-stable filler is recommended for the building material application.
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