Estimation of durability properties of self-healing concrete influenced by different bacillus species

The study was carried out with the influence of four Bacillus species, namely subtilis (BS), licheniformis (BL), halodurans (BH), and cereus (BC), in order to improve impermeable nature concrete. selected bacterial agents were cultured according nutrient broth medium method prepared two variable cell concentrations 108 109. In this study, bacteria used different modes, i.e., as an additive concrete a curing agent. However, all specimens cracked 65% stress level concentration then cured calcium lactate (only for bacteria-induced specimens) solution normal crack healing. durability behavior these monitored before crack, after regard, following tests performed: Rapid Chloride Permeability Test (RCPT), Water absorption test, Open porosity Acid attack test. From experimental observations, decline passage coulombs by 1352 C, water 3.47%, open 4.61%, increased resistance against acid found under (especially 109) compared other ones. Based on analysis results, cultures have enriched filling voids cracks calcite crystals. has shown better performance both types concrete, solutions.