Insight into the role of microbial calcium carbonate and the factors involved in self-healing concrete

Algaifi, Hassan Amer; Bakar, Suhaimi Abu; Sam, Abdul Rahman Mohd; Ismail, Mohammad; Abidin, Ahmad Razin Zainal; Shahir, Shafinaz; Altowayti, Wahid Ali Hamood

doi:10.1016/j.conbuildmat.2020.119258

Cited by 51 publications

(24 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similarly, the correlations between the actual and obtained data from the RSM models were also examined using correlation statistical parameters as shown in Equations (8)–(10) [ 63 , 64 ]. Specifically, the determination coefficient ( R 2 ), correlation coefficient ( R ), and adjusted R 2 were computed and evaluated, where K represented the number of independent parameters.…”

Section: Materials and Optimisation Modellingmentioning

confidence: 99%

Optimisation of GBFS, Fly Ash, and Nano-Silica Contents in Alkali-Activated Mortars

et al. 2021

View full text Add to dashboard Cite

Although free-cement-based alkali-activated paste, mortar, and concrete have been recognised as sustainable and environmental-friendly materials, a considerable amount of effort is still being channeled to ascertain the best binary or ternary binders that would satisfy the requirements of strength and durability as well as environmental aspects. In this study, the mechanical properties of alkali-activated mortar (AAM) made with binary binders, involving fly ash (FA) and granulated blast-furnace slag (GBFS) as well as bottle glass waste nano-silica powder (BGWNP), were opti-mised using both experimentally and optimisation modelling through three scenarios. In the first scenario, the addition of BGWNP varied from 5% to 20%, while FA and GBFS were kept constant (30:70). In the second and third scenarios, BGWNP (5–20%) was added as the partial replacement of FA and GBFS, separately. The results show that the combination of binary binders (FA and GBFS) and BGWNP increased AAM’s strength compared to that of the control mixture for all scenarios. In addition, the findings also demonstrated that the replacement of FA by BGWNP was the most significant, while the effect of GBFS replacement by BGWNP was less significant. In particular, the highest improvement in compressive strength was recorded when FA, GBFS, and BGWNP were 61.6%, 30%, and 8.4%, respectively. Furthermore, the results of ANOVA (p values < 0.0001 and high F-values) as well as several statistical validation methods (R > 0.9, RAE < 0.1, RSE < 0.013, and RRSE < 0.116) confirmed that all the models were robust, reliable, and significant. Similarly, the data variation was found to be less than 5%, and the difference between the predicted R2 and adj. R2 was very small (<0.2), thus confirming that the proposed non-linear quadratic equations had the capability to predict for further observation. In conclusion, the use of BGWNP in AAM could act as a beneficial and sustainable strategy, not only to address environmental issues (e.g., landfill) but to also enhance strength properties.

show abstract

Section: Materials and Optimisation Modellingmentioning

confidence: 99%

Optimisation of GBFS, Fly Ash, and Nano-Silica Contents in Alkali-Activated Mortars

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The observed strength reduction was attributed to the microstructure’s alteration induced by the reduced degree of hydration and poor distribution of the hydration products because of the inclusion of nutrients and microcapsules. Algaifi et al [ 126 ] reported that the inclusion of microbial calcium carbonate in the self-healing concrete matrix can improve the compressive strength when compared with the normal concrete specimens. Similar results were obtained by Shaheen et al [ 127 ] wherein the mechanical properties of the prepared concrete such as the compressive strength and splitting tensile strength were enhanced when immobilization techniques for the self-healing process was utilized.…”

Section: Effect Of Addition Self-healing Agents On Concrete Propermentioning

confidence: 99%

Biomimetic Self-Healing Cementitious Construction Materials for Smart Buildings

Shah

Huseien

2020

Biomimetics

View full text Add to dashboard Cite

Climate change is anticipated to have a major impact on concrete structures through increasing rates of deterioration as well the impacts of extreme weather events. The deterioration can affect directly or indirectly climate change in addition to the variation in the carbon dioxide concentration, temperature and relative humidity. The deterioration that occurs from the very beginning of the service not only reduces the lifespan of the concretes but also demands more cement to maintain the durability. Meanwhile, the repair process of damaged parts is highly labor intensive and expensive. Thus, the self-healing of such damages is essential for the environmental safety and energy cost saving. The design and production of the self-healing as well as sustainable concretes are intensely researched within the construction industries. Based on these factors, this article provides the materials and methods required for a comprehensive assessment of self-healing concretes. Past developments, recent trends, environmental impacts, sustainability, merits and demerits of several methods for the production of self-healing concrete are discussed and analyzed.

show abstract

“…Using bioconcrete in constructions and maintenance of old structures will contribute to preserve structure of the concrete, and reducing overall costs (Harshali et al 2016;Alves et al 2019;Castro-Alonso et al 2019). Additionally, microbe's contributions in this field are to be added to the list of biotechnological applications that emphasis the ability of microbes to continuously serve humanity (Daba et al 2018;Elkhateeb and Daba 2019;Waghmode et al 2019;Algaifi et al 2020). The term "microbe" refers to many different types of organisms, but research work on self-healing concrete has been so far restricted to bacteria (Achal et al 2011;Krishnapriya and Babu 2015;Jin et al 2018;Ruan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Review: Microbial induced mineralization of calcium carbonate for self-healing concrete

Elkhateeb

Elnahas

Daba

2021

Asian J Nat Prod Biochem

View full text Add to dashboard Cite

Abstract. Elkhateeb WA, Elnahas MO, Daba GM. 2021. Review: Microbial induced mineralization of calcium carbonate for self-Healing concrete. Asian J Nat Prod Biochem 19: 1-9. Low-cost solutions achieving concrete self-healing are attracting researchers attention. Generally, concrete self-healing mechanism has been so far accomplished by three approaches: autogenous healing, encapsulation of polymeric material, and microbial induced mineralization of calcium carbonate. Microbial approach seems like an attractive potent, relatively cheap way to achieve concrete self-healing. Hence, this review elucidates the microbial concrete self-healing mechanisms, and compare the roles of fungal and bacterial mediated self-healing concrete.

show abstract

Insight into the role of microbial calcium carbonate and the factors involved in self-healing concrete

Cited by 51 publications

References 71 publications

Optimisation of GBFS, Fly Ash, and Nano-Silica Contents in Alkali-Activated Mortars

Optimisation of GBFS, Fly Ash, and Nano-Silica Contents in Alkali-Activated Mortars

Biomimetic Self-Healing Cementitious Construction Materials for Smart Buildings

Review: Microbial induced mineralization of calcium carbonate for self-healing concrete

Contact Info

Product

Resources

About