Bio-mineralized self-healing recycled aggregate concrete for sustainable infrastructure

Khushnood, Rao Arsalan; Qureshi, Zarar Ali; Shaheen, Nafeesa; Ali, Sikandar

doi:10.1016/j.scitotenv.2019.135007

Cited by 101 publications

(33 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Bacillus species have been reported with maximum of 25.93% increase in compressive strength of cementitious mortar (Ghatiya and Pendharkar, 2017). Bacillus species are extensively researched in self-healing concrete; however, isolated strains in the recent studies have not been reported yet (Khushnood et al, 2018;Khushnood et al, 2019;Shaheen et al, 2019). Arthrobacter specie is also reported as 8.9% strength increase in cementitious mortar (Park et al, 2010).…”

Section: Mechanical Evaluation Of Cementitious Systemmentioning

confidence: 99%

“…Emerging evidence suggested that high alkaline pH of cementitious systems barred the microbial endurance in the long term . Immobilization of bacteria has been suggested for enhancing the survival of bacterial species inside the cementitious systems (Van Tittelboom et al, 2010;Khaliq and Ehsan, 2016;Khushnood et al, 2019). However, immobilizing material imparts extra cost and sometimes may react and can kill the microbes in addition to their interaction failure with cementitious systems (Shaheen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites

Shaheen

Jalil

Adnan

et al. 2021

Microbial Biotechnology

Self Cite

View full text Add to dashboard Cite

Microbially induced calcite precipitation (MICP), secreted through biological metabolic activity, secured an imperative position in remedial measures within the construction industry subsequent to ecological, environmental and economical returns. However, this contemporary recurrent healing system is susceptible to microbial depletion in the highly alkaline cementitious environment. Therefore, researchers are probing for alkali resistant calcifying microbes. In the present study, alkaliphilic microbes were isolated from different soil sources and screened for probable CaCO 3 precipitation. Non-ureolytic pathway (oxidation of organic carbon) was adopted for calcite precipitation to eliminate the production of toxic ammonia. For this purpose, calcium lactate Ca(C 3 H 5 O 3 ) 2 and calcium acetate Ca (CH 3 COO) 2 were used as CaCO 3 precipitation precursors. The quantification protocol for precipitated CaCO 3 was established to select potent microbial species for implementation in the alkaline cementitious systems as more than 50% of isolates were able to precipitate CaCO 3 . Results suggested 80% of potent calcifying strains isolated in this study, portrayed higher calcite precipitation at pH 10 when compared to pH 7. Ten superlative morphologically distinct isolates capable of CaCO 3 production were identified by 16SrRNA sequencing. Sequenced microbes were identified as species of Bacillus, Arthrobacter, Planococcus, Chryseomicrobium and Corynebacterium. Further, microstructure of precipitated CaCO 3 was inspected through scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermal gravimetric (TG) analysis. Then, the selected microbes were investigated in the cementitious mortar to rule out any detrimental effects on mechanical properties. These strains showed maximum of 36% increase in compressive strength and 96% increase in flexural strength.Bacillus, Arthrobacter, Corynebacterium and Planococcus genera have been reported as CaCO 3 producers but isolated strains have not yet been investigated in conjunction with cementitious mortar. Moreover, species of Chryseomicrobium and Glutamicibacter were reported first time as calcifying strains.

show abstract

Section: Mechanical Evaluation Of Cementitious Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites

Shaheen

Jalil

Adnan

et al. 2021

Microbial Biotechnology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Considering the factors such as local availability, cost, and protect impact of bacterial cells, advanced study focuses on bacteria that are immobilized via recycled coarse aggregate (RCA) and virgin fine aggregate (FA). It was found that using CA and 50% virgin FA as bacteria immobilizers exhibited the most effective crack repair method, which can heal a maximum crack width of 1.1 mm and restore 85% of the compressive strength while minimizing energy consumption and effectively lowering anthropogenic emission (as shown in Figure 9 ) [ 44 ].…”

Section: Carriers To Protect Microorganismmentioning

confidence: 99%

“… Percent regain of compressive strength w.r.t time at different pre-cracking age (reproduced with permission from ref. [ 44 ]) (Mix 1: reference mix without bacterial cells; Mix 2: bacterial cells were incorporated directly through makeup water; Mix 3: bacteria cells were immobilized through RCA; Mix 4: bacterial cells were incorporated through RCA and 50% virgin FA). …”

Section: Figurementioning

confidence: 99%

Microorganism, Carriers, and Immobilization Methods of the Microbial Self-Healing Cement-Based Composites: A Review

Shen

et al. 2021

Materials

View full text Add to dashboard Cite

Low tensile strength, poor elastic modulus, and complex concrete cracking work condition are almost unavoidable due to the intrinsic brittleness. To deal with concrete maintenance and durability, microbial self-healing concretes have been rapidly developed and widely applied recently. The microbial self-healing can specifically patch fractures as well as boost the concrete structure’s capacity, durability, and permeability. This paper presents the state-of-the-art in the microbe induced self-healing in cement-based composites. The microorganism and carriers were classified according to the working theory and repair effects. Additionally, the precise efficiency and effect of various technologies are also evaluated for microbial immobilization. Based on the literature review and summary from the perspective of microorganism, carriers, and immobilization methods, challenges and further works are discussed.

show abstract

“…In the study [61], bacteria were immobilized through recycled coarse aggregate (RCA) and fine aggregate (FA). Bacillus subtilis bacteria were included in the RCA.…”

Section: Self-healing Properties Induced By Bacteriamentioning

confidence: 99%

Bacterial Concrete as a Sustainable Building Material?

Stanaszek-Tomal

2020

Sustainability

View full text Add to dashboard Cite

The right selection of building materials plays an important role when designing a building to fall within the definition of sustainable development. One of the most commonly used construction materials is concrete. Its production causes a high energy burden on the environment. Concrete is susceptible to external factors. As a result, cracks occur in the material. Achieving its durability along with the assumptions of sustainable construction means there is a need to use an environmentally friendly and effective technique of alternative crack removal in the damaged material. Bacterial self-healing concrete reduces costs in terms of detection of damage and maintenance of concrete structures, thus ensuring a safe lifetime of the structure. Bacterial concrete can improve its durability. However, it is not currently used on an industrial scale. The high cost of the substrates used means that they are not used on an industrial scale. Many research units try to reduce production costs through various methods; however, bacterial concrete can be an effective response to sustainability.

show abstract

Bio-mineralized self-healing recycled aggregate concrete for sustainable infrastructure

Cited by 101 publications

References 52 publications

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites

Microorganism, Carriers, and Immobilization Methods of the Microbial Self-Healing Cement-Based Composites: A Review

Bacterial Concrete as a Sustainable Building Material?

Contact Info

Product

Resources

About

Bio-mineralized self-healing recycled aggregate concrete for sustainable infrastructure

Cited by 101 publications

References 52 publications

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO3 precipitation in bio‐based cementitious composites

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO3 precipitation in bio‐based cementitious composites

Microorganism, Carriers, and Immobilization Methods of the Microbial Self-Healing Cement-Based Composites: A Review

Bacterial Concrete as a Sustainable Building Material?

Contact Info

Product

Resources

About

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites

Isolation of alkaliphilic calcifying bacteria and their feasibility for enhanced CaCO₃ precipitation in bio‐based cementitious composites