2018
DOI: 10.15446/dyna.v85n205.68591
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Crack filling in concrete by addition of Bacillus subtilis spores – Preliminary study

Abstract: This study aimed to analyze the performance of two concrete mixtures with the addition of B. subtilis spores regarding their capacity of filling cracks during the curing time, evaluating whether the addition can influence the compressive strength of the concrete. For so, six concrete mixtures were studied divided in two mix compositions: 1:1:2 and 1:2:3 (cement: sand: gravel) with w/c of 0.33 and 0.45, respectively. For each composition were added concentrations of 0, 0.3x10 8 or 1.2x10 8 of B. subtilis spores… Show more

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Cited by 9 publications
(6 citation statements)
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“…The selected microorganisms are in accordance with the standard conditions of Vietnam. In this study, the author used the most widely used and popular family of bacillus microorganisms to make self-healing cementitious material by microorganisms [21]. Through the study, the source of bacillus subtilis in water can be divided into 3 types as illustrated in Figure 3 [22].…”
Section: Selection Of Materials Microorganisms and Fabrication Nutrientsmentioning
confidence: 99%
See 1 more Smart Citation
“…The selected microorganisms are in accordance with the standard conditions of Vietnam. In this study, the author used the most widely used and popular family of bacillus microorganisms to make self-healing cementitious material by microorganisms [21]. Through the study, the source of bacillus subtilis in water can be divided into 3 types as illustrated in Figure 3 [22].…”
Section: Selection Of Materials Microorganisms and Fabrication Nutrientsmentioning
confidence: 99%
“…For type 1 nurturing environments, several studies from around the world are summarized in the following tables [23], [24], [25], [26]: For type 2 nutrient medium, several mixtures are used: nutrient broth (beef broth + peptone + NaCl) [27], Mueller Hinton (MH) or Trypton Soy Broth broth. [28], yeast extract medium [29], or type 3 contains only calcium lactate C6H10CaO6 [22], [30]. Among these materials, calcium lactate C6H10CaO6 has the cheapest price and is easy to find in Vietnam market.…”
Section: Selection Of Materials Microorganisms and Fabrication Nutrientsmentioning
confidence: 99%
“…These findings support the hypothesis that there is a relation between the increase in bacterial concentration and the increase in compressive strength. This improvement was owing to bacteria producing more CaCO3 as a filler material for mortar pores and micro-cavities as a result of their biological activity [11,15].…”
Section: Effect Of Bacteria Concentrationmentioning
confidence: 99%
“…The porosity and connectivity of the pores affect the permeability of the mortar [7,8]. The more open the pore structure of mortar is, the more exposed the material is to penetrating substances' degradation mechanisms [2,9] This fact has motivated researchers to search for ways to produce smart, sustainable, and environmentally friendly concrete materials [10][11][12]. Different repairing techniques are available to repair the cracks, but they're expensive and time-consuming operations.…”
Section: Introductionmentioning
confidence: 99%
“…O procedimento foi repetido duas vezes (n = 2). Em seguida, a solução salina contendo bactérias foi armazenada por dois dias à temperatura de 8 ºC para induzir a formação de esporos (Schwantes-Cezario et al, 2018). A quantificação dos esporos bacterianos cultivados em meio de cultura MH foi realizada com o auxílio do espectrofotômetro com leitura a 600 nm.…”
Section: Microrganismo E Condição De Crescimentounclassified