Influence of biochar additions on the fracture behavior of foamed concrete

Falliano, Devid; Domenico, Dario De; Sciarrone, Antonino; Ricciardi, Giuseppe; Restuccia, Luciana; Ferro, Giuseppe Andrea; Tulliani, Jean‐Marc; Gugliandolo, Enrico

doi:10.3221/igf-esis.51.15

Cited by 29 publications

(8 citation statements)

References 25 publications

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“…The re duc tion in the com pres sive strength can be at trib uted to the dilu tion ef fect on the ce ment and also the ac cu mu la tion of the biochar par ti cles. These find ings are sim i lar to that of Khush nood et al [ 119 ], Ah mad et al [ 126 ] and Fal liano et al [ 158 ] where the in cor po ra tion of a higher con tent of biochar was re ported to have a con se quen tial ef fect on the flex ural strength. How ever, in con trast to the con ventional sup ple men tary ce men ti tious ma te ri als such as sil ica fume, no sig nif i cant ef fect was found when rice husk biochar was in cor po rated into mor tar mix tures due to its lower poz zolanic re ac tiv ity [ 42 ].…”

Section: 3 Flexural Strengthsupporting

confidence: 86%

Recent advancements in the use of biochar for cementitious applications: A review

Akinyemi

Adesina

2020

Journal of Building Engineering

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With in creas ing pop u la tion and ris ing de mands for im proved built en vi ron ment, there is an ex pected in crease in green house gas emis sion from the con struc tion in dus try. Car bon diox ide emis sion lev els are fast ap proaching a tip ping point which could lead to ir re versible cli mate change. The earth's ca pa bil ity to neu tralise the CO 2 emis sions through the nat ural car bon cy cle has been over stretched. There fore it is im per a tive to adopt technolo gies that are able to cap ture and se quester CO 2 in or der to can cel out their re lease from in dus trial ac tiv ities such as the con struc tion and build ing in dus try. This is im por tant so that ce ment-based ma te r ial pro ductions' car bon foot print can be re duced dras ti cally for a pos i tive change to take place in the cli mate. Biochar holds great promise as an ef fec tive CO 2 sorp tive ma te r ial in ce ment-based ap pli ca tions rel a tively sim i lar to its con ven tional use for soil amend ment. Ac tu ally, frag mented re searches on biochar as an ad mix ture in ce men titious ma te ri als have been con ducted. Based on this logic, this re view placed enor mous em pha sis on col lat ing in for ma tion from re cent stud ies on biochars from agro-sources used as an ad mix ture in ce ment-based ap pli cations. Sim i larly, the re view gave up-to-date knowl edge about the sources of the bio mass and the pro duc tion processes. Con clu sively, the pos i tive ef fects of biochar for car bon se ques tra tion on some prop er ties of the var ious ce men ti tious ap pli ca tions were high lighted.

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Section: 3 Flexural Strengthsupporting

confidence: 86%

Recent advancements in the use of biochar for cementitious applications: A review

Akinyemi

Adesina

2020

Journal of Building Engineering

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“…This water is then released as the available moisture used up for hydration reactions, promoting secondary hydration reactions and additional curing, resulting in a concrete with improved mechanical properties [22]. The use of biochar in cementitious mixtures has been shown to be beneficial since it can lead to an improvement of the physical and mechanical properties of the material [23][24][25][26][27][28][29][30][31]. However, since biochar used in literature comes from different raw materials and from production plants with different characteristics, there is no ideal mix design for its use, mainly due to the high variability of the intrinsic characteristics of biochar particles.…”

Section: Introductionmentioning

confidence: 99%

Biochar-based cement pastes and mortars with enhanced mechanical properties

Sirico

Bernardi

Belletti

et al. 2020

Frattura Ed Integrità Strutturale

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Nowadays, the environmental impact of cementitious material industry and more generally of building activities is matter of concern, especially in terms of their effects on climate change and consumption of natural resources. Within this context, the aim of this paper is the investigation of the role of biochar, a solid carbonaceous by-product material resulting from biomass pyrolysis/gasification of residual biomass, as a sustainable ingredient for the production of cementitious materials, combining carbon sink properties with enhanced mechanical properties. Although biochar is mainly investigated as agricultural amendment, there is also evidence that biochar may be a eco-friendly material to enhance the sustainable performance of cementitious materials. As outlined in literature, biochar can be used as filler to modify the nanogranular nature of cement matrix, or as substitute of clinker to reduce the emissions of greenhouse gases related to cement production. In this work, biochar is added as micro-nano particles in different cementitious composites, i.e. cement pastes and mortars, as a function of filler or partial substitute of cement. The main mechanical properties of biochar-based materials are then investigated to determine the optimal percentage of biochar addition.

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“…As said above, the mixes are prepared with the addition of biochar, so as to give the prepared material a green connotation. Moreover, in the relevant literature on both traditional cements [9] and special concretes, in particular foamed concretes [10], it has been found that the biochar improves certain characteristics of the mix, more specifically its fracture energy. The percentage of biochar varies from 5% to 22.7% of the cement weight.…”

Section: Methodsmentioning

confidence: 99%

Mechanical properties and carbon footprint of 3D-printable cement mortars with biochar additions

et al. 2020

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This contribution focuses on the design and the characterization of innovative mix designs of high consistency mortars with biochar additions in different percentage with respect to the cement weight. Biochar is a by-product material that gives the cementitious mix a sustainable connotation from an environmental point of view. The mix designs presented here are characterized by a good dimensional stability in the fresh state, peculiarity that gives them the possibility to be extruded and so, to be used in automated construction processes. In addition to the mechanical properties (flexural and compressive strength), the assessment of the CO2 emission of representative mixes is presented. Different biochar content and maximum diameter of the aggregate are studied, obtaining interesting indications on these parameters to optimize mechanical properties. Finally, on the basis of the CO2 emission assessment, certain venues for future research work to minimize CO2 emissions are reported.

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Influence of biochar additions on the fracture behavior of foamed concrete

Cited by 29 publications

References 25 publications

Recent advancements in the use of biochar for cementitious applications: A review

Recent advancements in the use of biochar for cementitious applications: A review

Biochar-based cement pastes and mortars with enhanced mechanical properties

Mechanical properties and carbon footprint of 3D-printable cement mortars with biochar additions

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