The roles of biochar as green admixture for sediment-based construction products
By Lei Wang, Liang Chen, Daniel C W Tsang, H. Kua, Jian Yang, Y. Ok, S. Ding, D. Hou, Chi-Sun Poon. Cement & Concrete Composites, 2019
201 citations recorded by the source corpus.
Abstract Routine navigational dredging generates huge quantities of marine sediment, posing significant environmental and economic burden. This research intended to explore the efficacy of wood waste biochar as a green admixture and assess the influence of different physico-chemical properties of dredged sediments on the mechanical performance of cement-based sediment products. X-ray diffraction and porosimetry analysis reflected that particle size distribution of sediments determined the pore structure formation and strength development. Thermal and calorimetry analyses showed that biochar incorporation slightly enhanced the cement hydration reaction, while its relatively large and brittle particles induced microcracks and weakened the strength of sediment products. Nevertheless, biochar addition enhanced immobilization of potentially toxic elements and organic contaminants, rendering the sediment products more environmentally acceptable. Hence, the innovative approach of this study can recycle dredged sediment and waste wood biochar to produce eco-friendly construction materials such as fill material and paving blocks.
Subfields: Building and Construction, Civil and Structural Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/51e84da10703f1e030bd14682f875ce269e285c9
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Citations in the corpus
- Multifunctional applications of biochar beyond carbon storage (2021, background): “[404] showed that biochar in sediment can improve cement hydration, and the biochar’s pores help immobilise potentially toxic elements and organic contaminants.”
- Technologies and perspectives for achieving carbon neutrality (2021, methodology): “In addition, the possible use of biochar in the manufacturing of value-added constructionmaterials has been explored.(255,256) For instance, in a study, Das et al.”