Application of biochar from coconut and wood waste to reduce shrinkage and improve physical properties of silica fume-cement mortar

Gupta, Souradeep; Krishnan, Padmaja; Kashani, Alireza; Kua, Harn Wei

doi:10.1016/j.conbuildmat.2020.120688

Cited by 91 publications

(22 citation statements)

References 49 publications

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“…When the biochar was added to the matrix, the surface became porous, with tubular and hive structures typical of the biochar nature (see white marked area) (Figure 10b). Morphological characterization reported by other authors shows uneven ridges on the surface typical of biochar derived from woody biomass [18,21]. However, as the percentage of biochar inside the matrix increased, the surface presented less porosity because biochar filled the pores: a compact and resistant material was obtained.…”

Section: Physical Analysismentioning

confidence: 70%

“…In the last year alone, interesting works have been published in this area which we report briefly below. In a mortar with silica fumes, the introduction of biochar reduces autogenic shrinkage and drying shrinkage and improves hydration, resistance and water permeability of the mortar [18]. In ultra-high performance concrete (UHPC) biochar as a mineral additive in partial replacement of cement, improves hydration thanks to its internal polymerization and nucleation effects [19].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Biochar-Based Geopolymer Materials

et al. 2021

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The aim of this research is to evaluate the possibility to realize alkali-activated materials exploiting biochar, a secondary raw material coming from pyrolysis/gasification processes, for environmental benefits, such as improvement of soil fertility and reduction of CO2 emissions into the atmosphere thanks to the carbon sink process where carbon dioxide is subtracted from the cycle of carbon. For the matrix of the geopolymers, a waste material derived from incinerator bottom ash was used and compared to pure metakaolin matrix. The materials obtained are lightweight and porous, with high water absorption capacity and moisture adsorption/desorption. BET analysis shows an increase in specific surface by increasing the biochar content and the biochar acts as a filler in the pores. From porosimetry analysis it is possible to follow the evolution of the curing process of the geopolymer prepared: specimens containing 70 wt% biochar after 28 and 90 days showed an increase in total Hg intrusion volume, pore area and total porosity but a decrease in the dimensions of pores. Due to the technical properties of materials containing biochar, they can be used in the future for a cleaner design of products in the field of sustainable construction for insulating panels or lightweight materials for houses and gardens in terraces and balconies.

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Section: Physical Analysismentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Biochar-Based Geopolymer Materials

et al. 2021

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“…Actually, previous study suggested adding merely 1% of biochar to the cement matrix could increase its compressive strength dramatically by 8.9% (Wang et al 2020d). Elevated elastic modulus (Gupta et al 2018b), decreased water absorption behavior (Gupta et al 2020a), and improved shrinkage properties (Gupta et al 2018a) were also observed. The stability of biochar incorporated into the cementitious matrix is excellent as compared with direct incorporation of fresh biomass, which is because of the same alkaline nature of cement matrix and pyrolyzed biochar.…”

Section: Low-carbon Infrastructurementioning

confidence: 87%

Role of biochar toward carbon neutrality

et al. 2023

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Carbon neutrality by the mid-twenty-first century is a grand challenge requiring technological innovations. Biochar, a traditional soil amendment which has been used for fertility improvement and contaminant remediation, has revealed new vitality in this context. In this review we highlight the huge potential of biochar application in different fields to mitigate as high as 2.56 × 109 t CO2e total greenhouse gas (GHG) emissions per year, accounting for 5.0% of the global GHG emissions. Soil applications of biochar as either a controlled-release fertilizer or an immobilization agent offer improved soil health while simultaneously suppressing the emissions of CH4 and N2O. Non-soil applications of biochar also contribute to carbon neutrality in unique ways. Firstly, biochar application as a ruminant feed decreases CH4 emissions via physical sorption and enhanced activities of methanotrophs. Secondly, biochar can be used as a green catalyst for biorefinery. Besides, biochar as an additive to Portland cement and low impact development (LID) infrastructure lowers the carbon footprint and builds resilience to climate change. Furthermore, biochar can be used as novel batteries and supercapacitors for energy storage purposes. Finally, the high CO2 adsorption capacity makes it possible for biochar being used as a sorbent for carbon capture, utilization, and storage (CCUS). We advocate that future research should further explore the effectiveness of biochar systems for climate change mitigation in large scale applications, and assess the economic and social viability of local biochar systems to combat climate change. Graphical Abstract

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“…The third group of articles are focusing on a subject similar to the second research direction, the possibility of using wood waste to produce other combustion materials that can be further used in the production of bioenergy. Some studies are addressing the use of wood waste in form of biochar, 61 the proprieties of wood waste‐derived biochar, 62 and improve wood pellet quality 63 . Biochar is one of the keywords highlighted also by the trend topic plot, as being one of the most frequently used words in the last years.…”

Section: Discussionmentioning

confidence: 99%

The use of wood waste from construction and demolition to produce sustainable bioenergy—a bibliometric review of the literature

Maier

2022

Intl J of Energy Research

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Summary The purpose of this paper is to investigate the perspective of using wood waste, especially the one that resulted from the construction and demolition activities, to produce sustainable bioenergy. The context of this research is characterized by a more accelerated need for development, a growing need for energy to fuel all human activities, and a greater awareness of the pressure on the environment and the negative effects produced. One of the major challenges for environmental protection is the issue of mitigating CO2 emissions, and among the biggest contributors to the CO2 emissions is the construction industry. Given the current rhythm of society development, a decrease in construction activities is not possible so a solution can be better management of the waste produced in various stages. If the need for better waste management is joined with the need for more sustainable energy, then using waste to produce bioenergy seems like a good solution. This study focuses mainly on wood waste and to respond to the research purpose it uses bibliometric literature search, scientometric analysis, and in‐depth discussions. The data were obtained by interrogating the ISI Web of Science database using the keywords “bioenergy”, “wood waste” and “construction and demolition” as search criteria. The extraction of data was done using the PRISMA method and processed with VOSviewer and Bibliometrix software. The processing of the data was done so to obtain information related to the importance of the research topic given by the number of publications, the most studied topics revealed by a keywords co‐occurrence analysis and a trend topic plot, as well as the world scientific productions on the studied topics. The main results indicate a significant increase, in the last years, of the interest in the studied topics, all over the world. Wood waste is considered as a direct combustion fuel or as a raw material for components of fuels used to produce energy, as well as components for new building materials. Given the limitations of other renewable energy sources, wood biomass is a subject that must be considered more in the future. The use of wood waste as biomass for the production of bioenergy can be a very good solution that will bring the advantage of both ensuring a renewable source of energy and at the same time decreasing the impact of the building industry on the environment.

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Application of biochar from coconut and wood waste to reduce shrinkage and improve physical properties of silica fume-cement mortar

Cited by 91 publications

References 49 publications

Synthesis and Characterization of Biochar-Based Geopolymer Materials

Synthesis and Characterization of Biochar-Based Geopolymer Materials

Role of biochar toward carbon neutrality

The use of wood waste from construction and demolition to produce sustainable bioenergy—a bibliometric review of the literature

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