Charcrete: incorporation of bio-char in concrete for carbon sequestration and improved physical and acoustic properties

生物质热解将残留的有机物质(农业、林业或市政)转化为生物油、生物炭和天然气等附加值产品。虽然生物油作为石油原料的潜在替代品已经引起了研究人员和工业界的关注，但最近人们的注意力已经扩大到生物炭。生物炭是一种相对多孔的碳基材料，包括原始生物质的矿物质含量。它的物理特性包括重量轻、绝缘性好、对水分和污染物的吸附能力、防辐射以及碳封存。拟议的研究重点是开发生物炭的特性，使其成为一种有吸引力的材料，用于绿色建筑材料。总体目标包括在灰泥和混凝土砖/砌块样品中添加不同比例的生物炭的定性和定量表征，包括：(A)机械性能和耐久性，包括重量和抗压强度；(B)养护时间；(C)保湿和控制；(D)碳封存潜力；(E)吸声和透声损失；(F)导热性；(G)冻融耐候性；(H)气味/污染物吸附性能。

Biomass pyrolysis transforms residual organic materials (agricultural, forestry or municipal) into value-added products such as biooil, biochar and gases. While bio-oil has attracted the attention of researchers and industry as a potential substitute for petroleum feedstocks, recent attention has been expanded to biochar. Biochar is a relatively porous carbon-based material including the mineral content of the original biomass. Its physical characteristics include light weight, excellent insulating properties, adsorption capacity for moisture and pollutants, protection from radiation, as well as carbon sequestration. The proposed research focuses on the exploitation of biochar properties which could make it as an attractive material to incorporate in green building materials. The overall objectives include both qualitative and quantitative characterization of the addition of different proportions of biochar to samples of plaster and of concrete bricks/blocks in terms of (a) mechanical properties and durability, including weight and compressive strength, (b) curing time, (c) moisture retention and control, (d) carbon sequestration potential, (e) acoustic properties including sound absorption and sound transmission loss, (f) thermal conductivity, (g) freeze-thaw weathering, and (h) odors/pollutants adsorption properties.