Mechanical characterization of different biochar-based cement composites

Restuccia, Luciana; Ferro, Giuseppe Andrea; Suarez-Riera, Daniel; Sirico, Alice; Bernardi, Patrizia; Belletti, Beatrice; Malcevschi, Alessio

doi:10.1016/j.prostr.2020.04.027

Cited by 46 publications

(13 citation statements)

References 26 publications

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“…Most studies in the past showed significant improvements in concrete’s compressive and flexural strength [ 3 , 64 , 65 , 66 , 67 , 68 ]. Other mechanical properties of concrete, such as toughness, flexibility, elongation, permeability, thermal stability, and thermal conductivity, were also observed [ 19 , 64 , 69 , 70 ]. Despite a relatively high cost of production of biochar [ 71 ], compared to natural filler materials such as sand, it is still considered a better construction material due to its associated environmental benefits of reduced CO 2 -eq./kg as well as the generation of other value-added products such as syngas, bio-oil production in pyrolysis.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, Choi et al [ 18 ] partially replaced the cement by adding biochar in a mortar and reported replacing 5% biochar showed a 10% increase in the compressive strength. Correspondingly, substantial improvement in mechanical strength (16–20%), water penetration (40%), and water absorption (35–60%) by the addition of biochar produced from various feedstock were reported [ 3 , 19 ]. Furthermore, Restuccia et al [ 16 ] stated that adding biochar to cement paste could enhance its fracture energy and modulus of rupture.…”

Section: Introductionmentioning

confidence: 99%

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Biochar Produced from Saudi Agriculture Waste as a Cement Additive for Improved Mechanical and Durability Properties—SWOT Analysis and Techno-Economic Assessment

et al. 2022

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The Kingdom of Saudi Arabia generates an enormous amount of date palm waste, causing severe environmental concerns. Green and strong concrete is increasingly demanded due to low carbon footprints and better performance. In this research work, biochar derived from locally available agriculture waste (date palm fronds) was used as an additive to produce high-strength and durable concrete. Mechanical properties such as compressive and flexural strength were evaluated at 7, 14, and 28 days for control and all other mixes containing biochar. In addition, the durability properties of the concrete samples for the mixes were investigated by performing electric resistivity and ultra-sonic pulse velocity testing. Finally, a SWOT (strengths, weaknesses, opportunities, and threats) analysis was carried out to make strategic decisions about biochar’s use in concrete. The results demonstrated that the compressive strength of concrete increased to 28–29% with the addition of 0.75–1.5 wt% of biochar. Biochar-concrete containing 0.75 wt% of biochar showed 16% higher flexural strength than the control specimen. The high ultrasonic pulse velocity (UPV) values (>7.79 km/s) and low electrical resistivity (<22.4 kΩ-cm) of biochar-based concrete confirm that the addition of biochar resulted in high-quality concrete free from internal flaws, cracks, and better structural integrity. SWOT analysis indicated that biochar-based concrete possessed improved performance than ordinary concrete, is suitable for extreme environments, and has opportunities for circular economy and applications in various construction designs. However, cost and technical shortcomings in biochar production and biochar-concrete mix design are still challenging.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biochar Produced from Saudi Agriculture Waste as a Cement Additive for Improved Mechanical and Durability Properties—SWOT Analysis and Techno-Economic Assessment

et al. 2022

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“…Em busca de uma porcentagem ideal de adição biocarvão para garantir a melhoria das propriedades mecânicas, Restuccia et al (2020) ensaiaram diferentes amostras de argamassas e observaram que a adição de biocarvão pode aumentar a resistência à flexão e energia de fratura de compósitos cimentícios. A porcentagem utilizada (2% em peso e 2,5% em peso para pastas de cimento e argamassas, respectivamente) difere de outros resultados na literatura, fato este que pode ser decorrente da forma de produção e material precursor.…”

Section: Biocarvão Em Compostos Cimentíciosunclassified

Uso de concreto permeável com aditivos no tratamento de águas residuárias, com enfoque no biocarvão: uma revisão

Clementino

Santiago

Sousa

et al. 2021

RSD

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Nos grandes centros urbanos, a constante impermeabilização das vias intensifica alagamentos e enchentes, gerando inúmeros transtornos à população. O uso do concreto permeável como mecanismo de drenagem de águas pluviais e residuárias tem sido uma solução parcial para esse tipo de problema de drenagem, inclusive com a adição em sua composição de materiais com propriedades adsorventes que visem a melhoria de parâmetros físico-químicos e biológicos da água. Portanto, este artigo tem como objetivo geral trazer importantes resultados de diversos estudos utilizando concreto permeável com adições minerais e mostrar os benefícios nas propriedades mecânicas e adsorventes desse tipo de concreto, com ênfase na utilização do biocarvão. Para isso, optou-se como metodologia, fazer uma breve revisão da literatura, no qual foram analisadas pesquisas concluídas disponíveis em base de dados online como Scopus, Science Direct a partir do ano de 2015 utilizando como descritores em inglês: “Concrete” AND “Biochar”, “Concrete porous” AND “Biochar”, “Pervious concrete” AND “Biochar”, “Treatment of water” AND “Concrete porous”, “Cementitious materials” AND “Biochar”. Foram selecionadas 51 referências sendo assim especificados: 48 artigos científicos, 1 norma e 2 capítulos de livros. Constatou-se que a adição de minerais adsorventes e biocarvão no concreto podem promover melhoria de parâmetros de qualidade da água como diminuição de turbidez, nitrogênio totais (NT), Fósforo Totais (PT), DQO, DBO, entre outros, e promoverem, em alguns casos, ganho de resistência mecânica dos concretos produzidos.

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“…For instance, biochars can reduce 870 kg CO 2 -equivalent of GHG per ton of dry feedstock. 29 In this study, to reduce the indoor energy load due to the application of building finishing materials, an artificial stone was manufactured by integrating a PCM and biochar. To improve the thermal inertia of the building, the PCM was vacuum impregnated into the LWA.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they can effectively increase environmental performance by building energy‐saving research for greenhouse gas (GHG) reduction. For instance, biochars can reduce 870 kg CO 2 ‐equivalent of GHG per ton of dry feedstock 29 …”

Section: Introductionmentioning

confidence: 99%

Evaluation of energy consumption in apartment buildings with biochar and phase‐change material aggregate‐applied artificial stone finishing materials

Kim

Yang

Yun

et al. 2022

Intl J of Energy Research

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Artificial stones for architectural finishing satisfy the aesthetic needs of building occupants and can be easily mixed with other materials. In this study, the thermal inertia of specimens prepared using lightweight aggregate vacuum impregnated with n-octadecane was improved, and the thermal conductivity was improved by mixing biochar having micropores with cement. The applicability of the specimens to apartment buildings in various climatic zones was analyzed. The specimens showed noPCM leakage and were stable in terms of strength and morphology. In addition, they exhibited low thermal conductivity depending on the use of biochar. Simulation results revealed that apartments in the climatic zone with the highest average annual temperature exhibited the highest reduction in cooling energy. The monthly cooling energy reduction was generally evenly distributed in the Bsh, Cfa, and Cfb regions, and the cooling energy decrease was concentrated in cold climate regions, such as in the Dfa and Dfb regions. In the Dfa region, there is a risk of heating energy increasing when the seasons change, and in regions having extreme climatic conditions (ie, excessively hot or cold), the PCM does not change its phase appropriately. Therefore, the application of a PCM appropriate for the climate can help effectively save energy consumption in buildings. Highlights• Biochar and PCM can contribute to the thermoregulation of buildings and increase indoor thermal comfort.• Artificial stone for interior finishing of buildings that integrates biochar and PCM was manufactured.• Building energy simulations for eight climatic zones were performed.• Interior finishes incorporating biochar and PCM contribute to building energy savings.

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Mechanical characterization of different biochar-based cement composites

Cited by 46 publications

References 26 publications

Biochar Produced from Saudi Agriculture Waste as a Cement Additive for Improved Mechanical and Durability Properties—SWOT Analysis and Techno-Economic Assessment

Biochar Produced from Saudi Agriculture Waste as a Cement Additive for Improved Mechanical and Durability Properties—SWOT Analysis and Techno-Economic Assessment

Uso de concreto permeável com aditivos no tratamento de águas residuárias, com enfoque no biocarvão: uma revisão

Evaluation of energy consumption in apartment buildings with biochar and phase‐change material aggregate‐applied artificial stone finishing materials

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