Multiscale mechanical quantification of self-healing concrete incorporating non-ureolytic bacteria-based healing agent

Xu, Jing; Yao, Wu

doi:10.1016/j.cemconres.2014.06.003

Cited by 222 publications

(83 citation statements)

References 23 publications

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“…Previous study has reported that calcite deposition in pores caused reduction in water uptake [4,7]. Xu and Yao [10] had reported that additional calcium source in bioconcrete reduced the water penetration and increased the concrete durability. …”

Section: Water Penetrationmentioning

confidence: 99%

“…Thus, may have different reactions. In Xu et al [10] and AboEl-Enein [12] studies, calcium source were added into bioconcrete. After which compressive strength were tested and compared.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…This is similar for both bacteria. The increment of strength with addition of bacteria are due to deposition of calcite facilitated by calcium nutrient [10,14].…”

Section: Compressive Strengthmentioning

confidence: 99%

“…Adding calcium source in the concrete helps in increasing the amount of precipitated calcium carbonate and therefore increases strength and improve durability. The amount of precipitated calcium carbonate depends on in the type of calcium source added [10].…”

Section: Introductionmentioning

confidence: 99%

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Calcium Lactate addition in Bioconcrete: Effect on Compressive strength and Water penetration

et al. 2016

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Abstract. This paper presents compressive strength and water penetration of bioconcrete with addition of calcium lactate. Bioconcrete has higher engineering concrete properties and durability compared to normal concrete but the natural production of calcium carbonate is limited to the calcium content in cement. Therefore, additional calcium is added as an additional calcium source to study the influence towards compressive strength and water penetration. The bacteria used in this research are Enterococcus faecalis and Bacillus sp. Calcium lactate was added into concrete mix in concentrations of 0.001mol/l, 0.005mol/l and 0.01mol/l of liquid used. The concentration of bacteria added into the mix is by partial replacement of water used in casting, which are 3% for Enterococcus faecalisand 5% for Bacillus sp. Both compressive strength and water penetration test used cubes of 150mm × 150mm × 150mm. The cubes were tested after 28 days. The result of compressive strength for control is 36 MPa while partial replacement of bacteria yields 38.2 MPa for 3% Enterococcus faecalisand 37.0 MPa for 5% Bacillus sp. Calcium lactate with 0.005 mol/L has the best performance with 42.8 MPa for Enterococcus faecalis and 39.6 MPa for Bacillus sp. Whereas for water penetration, the best concentration of calcium lactate which yielded the lowest water penetration is 0.01 mol/l for both Enterococcus faecalis and Bacillus sp which are 8.7 cm and 8 cm respectively. The addition of calcium lactate into bioconcrete is quite promising for improvement of concrete properties and durability.

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Section: Water Penetrationmentioning

confidence: 99%

“…Thus, may have different reactions. In Xu et al [10] and AboEl-Enein [12] studies, calcium source were added into bioconcrete. After which compressive strength were tested and compared.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…This is similar for both bacteria. The increment of strength with addition of bacteria are due to deposition of calcite facilitated by calcium nutrient [10,14].…”

Section: Compressive Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calcium Lactate addition in Bioconcrete: Effect on Compressive strength and Water penetration

et al. 2016

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“…In addition, different metabolic pathways are employed by the bacteria for the precipitation of CaCO3 depending on the species and the environmental conditions . The biogenic self-healing agents, which are frequently encountered in the literature, follow three different metabolic routes; i.e., the enzymatic hydrolysis of urea (Ramachandran et al, 2001;De Muynck et al, 2008;Wang et al, 2014), the oxidation of organic carbon (Jonkers et al, 2010;Wiktor and Jonkers, 2011;Jonkers and Mors, 2012;Stuckrath et al, 2014;Xu and Yao, 2014;Sierra Beltran et al, 2015;Paine et al, 2016;Tziviloglou et al, 2016), and the anoxic oxidation of organic carbon (Ersan, 2016). This paper discusses the oxidation of organic carbon system.…”

Section: Introductionmentioning

confidence: 99%

Selection of Nutrient Used in Biogenic Healing Agent for Cementitious Materials

et al. 2017

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Biogenic self-healing cementitious materials target on the closure of micro-cracks with precipitated inorganic minerals originating from bacterial metabolic activity. Dormant bacterial spores and organic mineral compounds often constitute a biogenic healing agent. The current paper focuses on the investigation of the most appropriate organic carbon source to be used as component of a biogenic healing agent. It is of great importance to use an appropriate organic source, since it will first ensure an optimal bacterial performance in terms of metabolic activity, while it should, second, affect the least the properties of the cementitious matrix. The selection is made among three different organic compounds, namely calcium lactate (CaL), calcium acetate (CaA), and sodium gluconate (NaG). The methodology that was used for the research was based on continuous and non-continuous oxygen consumption measurements of washed bacterial cultures and on compressive strength tests on mortar cubes. The oxygen consumption investigation revealed a preference for CaL and CaA, but an indifferent behavior for NaG. The compressive strength on mortar cubes with different amounts of either CaL or CaA (up to 2.24% per cement weight) was not or it was positively affected when the compounds were dissolved in the mixing water. In fact, for CaL, the increase in compressive strength reached 8%, while for CaA, the maximum strength increase was 13.4%.

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Recent Advances in Intrinsic Self‐Healing Cementitious Materials

et al. 2018

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Self-healing is a natural phenomenon whereby living organisms respond to damage. Recently, considerable research efforts have been invested in self-healing cementitious materials that are capable of restoring structural integrity and mechanical properties after being damaged. Inspired by nature, a variety of creative approaches are explored here based on the intrinsic or extrinsic healing mechanism. Research on new intrinsic self-healing cementitious materials with biomimetic features is on the forefront of material science, which provides a promising way to construct resilient and sustainable concrete infrastructures. Here, the current advances in the development of the intrinsic healing cementitious materials are described, and a new definition of intrinsic self-healing discussed. The methods to assess the efficiency of different healing mechanisms are briefly summarized. The critical insights are emphasized to guide the future research on the development of new self-healing cementitious materials.

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Multiscale mechanical quantification of self-healing concrete incorporating non-ureolytic bacteria-based healing agent

Cited by 222 publications

References 23 publications

Calcium Lactate addition in Bioconcrete: Effect on Compressive strength and Water penetration

Calcium Lactate addition in Bioconcrete: Effect on Compressive strength and Water penetration

Selection of Nutrient Used in Biogenic Healing Agent for Cementitious Materials

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

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