The roles of biochar as green admixture for sediment-based construction products

Lei Wang; Liang Chen; Daniel C.W. Tsang; Harn Wei Kua; Jian Yang; Yong Sik Ok; Shiming Ding; Deyi Hou; Chi Sun Poon

doi:10.1016/j.cemconcomp.2019.103348

The roles of biochar as green admixture for sediment-based construction products

Lei Wang, Liang Chen, Daniel C.W. Tsang, Harn Wei Kua, Jian Yang, Yong Sik Ok, Shiming Ding, Deyi Hou, Chi Sun Poon

Research output: Contribution to journal › Article › peer-review

134 Citations (Scopus)

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.

Original language	English
Article number	103348
Journal	Cement and Concrete Composites
Volume	104
DOIs	https://doi.org/10.1016/j.cemconcomp.2019.103348
Publication status	Published - 2019 Nov

Keywords

Eco-friendly construction materials
Engineered biochar
Green/sustainable remediation
Microstructure analysis
Stabilization/solidification
Waste vaorization/recycling

ASJC Scopus subject areas

Building and Construction
Materials Science(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cemconcomp.2019.103348

Cite this

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title = "The roles of biochar as green admixture for sediment-based construction products",

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.",

keywords = "Eco-friendly construction materials, Engineered biochar, Green/sustainable remediation, Microstructure analysis, Stabilization/solidification, Waste vaorization/recycling",

author = "Lei Wang and Liang Chen and Tsang, {Daniel C.W.} and Kua, {Harn Wei} and Jian Yang and Ok, {Yong Sik} and Shiming Ding and Deyi Hou and Poon, {Chi Sun}",

note = "Funding Information: The authors appreciate the financial support from the Hong Kong Research Grants Council ( E-PolyU503/17 and PolyU 15223517 ), RISUD Collaborative Research Program ( 4-ZZCN ), and PolyU Project of Strategic Importance ( 1-ZE12 ) for this study. Funding Information: The authors appreciate the financial support from the Hong Kong Research Grants Council (E-PolyU503/17 and PolyU 15223517), RISUD Collaborative Research Program (4-ZZCN), and PolyU Project of Strategic Importance (1-ZE12) for this study. Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = nov,

doi = "10.1016/j.cemconcomp.2019.103348",

language = "English",

volume = "104",

journal = "Cement and Concrete Composites",

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AU - Chen, Liang

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AU - Ok, Yong Sik

AU - Ding, Shiming

AU - Hou, Deyi

AU - Poon, Chi Sun

N1 - Funding Information: The authors appreciate the financial support from the Hong Kong Research Grants Council ( E-PolyU503/17 and PolyU 15223517 ), RISUD Collaborative Research Program ( 4-ZZCN ), and PolyU Project of Strategic Importance ( 1-ZE12 ) for this study. Funding Information: The authors appreciate the financial support from the Hong Kong Research Grants Council (E-PolyU503/17 and PolyU 15223517), RISUD Collaborative Research Program (4-ZZCN), and PolyU Project of Strategic Importance (1-ZE12) for this study. Publisher Copyright: © 2019

PY - 2019/11

Y1 - 2019/11

N2 - 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.

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The roles of biochar as green admixture for sediment-based construction products

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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