Mechanical properties of sulphate reduction bacteria on the durability of concrete in chloride condition

Abstract

In construction, concrete durability is an important material globally used in engineering, material of which can be applied in the fields of specialized marine construction. The ingress of chloride into concrete causes deterioration in the concrete due to the reinforcement corrosion. Adding bacteria into concrete can improve material properties and increase durability with mechanism resist chloride ingressed in the concrete . Ingress of Chloride into the concrete of bacteria is particularly suited for applications of chloride ion penetration in concrete. The objective of the research is to determine the effect of adding bacteria into the concrete properties. The bacteria used in this research is locally isolated and enriched to the suite with the concrete environment. The type of the bacteria used is identified as Sulphate Reduction Bacteria (SRB). The SRB added into the concrete mix with concentrations of 3%, 5% and 7%. Whereas, concentration of bacteria water of cement is 0.5. The mechanical properties test conducted with 28th, 56th, 90th, 180th and 360th day of curing period. The test was using cyclic wetting and drying to study the exposure to chloride condition, such as compressive strength, tensile strength and flexural test. Cubes in the size of 150 mm × 150 mm × 150 mm were prepared for compressive strength test and cylinder 150 mm × 300 mm were prepared for the tensile strength test. The flexural strength test was on the prism in the size of 100 mm × 100 mm × 500 mm. The result of compressive strength test shows, that gave significant strength of 66.3 MPa on the 360th day. The tensile strength and flexural strength have a similar trend as compressive strength results, where both results were optimum . The tensile strength test shows that 4.52 MPa tends to control 3.96 MPa. The result of flexural strength test was 8.23 MPa for compared to control of 5.99 MPa. The overall results of the bacteria indicate promising outcome and further study on chloride condition capability is encouraging.

Microbially Induced Calcium Carbonate Precipitation (MICP) and Its Potential in Bioconcrete: Microbiological and Molecular Concepts

“…Recently Alshalif et al (2016) reported that the addition of sulfate-reducing bacteria in a concrete matrix increased the compressive strength of concrete by 13% and decreased water permeability by 8.5%. More recently, Tambunan et al (2019) reported an increase in compressive strength (60.87%) and flexural strength (52.30%) by adding SRB isolated from domestic acidic water (Table 1). However, generation of H 2 S can cause corrosion of the concrete structure, since H 2 S reacts with oxygen to form elemental sulfur or a partially oxidized sulfur species, which are considered to be corrosion products of concrete surfaces (O'Connell et al, 2010).…”

3D bioprinting of mineralizing cyanobacteria as novel approach for the fabrication of living building materials

“…In addition to cyanobacteria, there are other microorganisms capable of MICP, such as sulfate-reducing bacteria (Perito and Mastromei, 2011;Alshalif et al, 2016;Tambunan et al, 2019), microorganisms that utilize organic acids (Rodriguez-Navarro et al, 2003;Chekroun et al, 2004;Zhu and Dittrich, 2016), and microorganisms that are involved in a nitrogen cycle (Ersan et al,…”

“…In addition to cyanobacteria, there are other microorganisms capable of MICP, such as sulfate-reducing bacteria ( Perito and Mastromei, 2011 ; Alshalif et al, 2016 ; Tambunan et al, 2019 ), microorganisms that utilize organic acids ( Rodriguez-Navarro et al, 2003 ; Chekroun et al, 2004 ; Zhu and Dittrich, 2016 ), and microorganisms that are involved in a nitrogen cycle ( Ersan et al, 2015 ; Zhu and Dittrich, 2016 ). Dhami et al (2013b) describe the ureolytic pathway as the most easily controllable mechanism with the potential for rapid CaCO 3 production.…”

Self-healing concrete techniques and performance, A review

“…However, other studies revealed that sulfate-reducing bacteria in concrete at different concentrations significantly improved the material's compressive, tensile, and flexural strengths. As per the findings, the utilization of this pathway is not common owing to elevated levels of sulfate [71].…”