Novel biochar-concrete composites: Manufacturing, characterization and evaluation of the mechanical properties

Akhtar, Ali; Sarmah, Ajit K.

doi:10.1016/j.scitotenv.2017.10.319

Cited by 214 publications

(91 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nonethe less, the com pres sive strength of all mor tar mix tures in cor porat ing biochar in creased with age in di cat ing the ad di tion of the biochar does not have any detri men tal ef fect on the pro gres sion of the hy dra tion re ac tion. Akhtar and Sarmah [ 107 ] in ves ti gated the ef fect of three types of biochar (i.e. poul try lit ter, pulp and pa per sludge and rice husk) on the com pres sive strength of con crete.…”

Section: Mechanical Properties 2 1 Compressive Strengthmentioning

confidence: 99%

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

Akinyemi

Adesina

2020

Journal of Building Engineering

View full text Add to dashboard Cite

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.

show abstract

Section: Mechanical Properties 2 1 Compressive Strengthmentioning

confidence: 99%

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

Akinyemi

Adesina

2020

Journal of Building Engineering

View full text Add to dashboard Cite

show abstract

“…A 1 wt% bio-char generated from food waste was found to increase the impermeability of mortar [31]. A pulp and paper mill sludge bio-char, with a content of 0.1% of total volume, was found to improve the mechanical strength of conventional concrete [32]. A 10 wt% swine manure bio-char decreases the temperature susceptibility and shear susceptibility of asphalt binder [33].…”

Section: Introductionmentioning

confidence: 99%

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

et al. 2018

View full text Add to dashboard Cite

To improve the performance of petroleum asphalt, bio-char was used as a modifier for a petroleum asphalt binder, in this study. The rheological properties of bio-char modified asphalt binders were compared with different particle sizes and contents, with one control and one flake graphite modified asphalt binder. Specifically, the bio-char modifiers with two particle sizes (ranging from 75 μm–150 μm and less than 75 μm) and three contents of 2%, 4%, and 8% were added into the asphalt binder. A flake graphite powder with particle sizes less than 75 μm was used as a comparison modifier. The Scanning Electron Microscopy (SEM) image showed the porous structure and rough surface of bio-char as well as dense structure and smooth surface of flake graphite. A Rotational Viscosity (RV) test, Dynamic Shear Rheometer (DSR) test, aging test, and Bending Beam Rheometer (BBR) test were performed to evaluate the properties of bio-char modified asphalt in this study. Both modifiers could improve the rotational viscosities of the asphalt binders. The porous structure and rough surface of bio-char lead to larger adhesion interaction in asphalt binder than the smooth flake graphite. As a result, the bio-char modified asphalts had better high-temperature rutting resistance and anti-aging properties than the graphite modified asphalt, especially for the binders with the smaller-sized and higher content of bio-char particles. Furthermore, the asphalt binder modified by the bio-char with sizes less than 75 μm and about 4% content could also achieve a better low-temperature crack resistance, in comparison to other modified asphalt binders. Thus, this type of bio-char particles is recommended as a favorable modifier for asphalt binder.

show abstract

“…The environmental impact of using ordinary Portland cement (PC) to produce concrete is primarily due to the approximately 7% of carbon dioxide emission 1–4 . An overwhelming consensus has been reached on the use of mineral admixtures, such as FA, limestone powder, slag, and silica fume to replace the bulk portion of cement in concrete to reduce the carbon footprint of the concrete industry.…”

Section: Introductionmentioning

confidence: 99%

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Yang

Che

Leng

2018

Sci Rep

View full text Add to dashboard Cite

The mechanisms underlying the effects of nano-calcium carbonate (NC) on the strength of high volume fly ash (FA) mortar are discussed. Two NCs are used as 2%, 4%, 6%, and 8% by weight of cementitious materials. Hydrated products of fly ash mortar containing NC was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TG) and differential thermal gravity (DTG) analysis. Results indicate that NC could improve strength of FA mortar due to the more rapid growth of hydrated products induced by NC through additional nucleation sites. Corresponding to the highest measured strength of FA mortar, the optimal contents of NC are around 2%. In addition, the presence of 2% NC improved the microstructure of FA mortar after 180 days due to the formation of calcium carbonaluminate hydrate.

show abstract

Novel biochar-concrete composites: Manufacturing, characterization and evaluation of the mechanical properties

Cited by 214 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

Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Contact Info

Product

Resources

About