Self-repairing polyethylene fiber-reinforced-concrete with bacillus subtilis bacteria a review

Abstract

Fibers and bacterial additives in concrete have achieved significant success as a construction material. This paper presents the field of concrete self-repairing by introducing both Bacillus subtilis bacteria and polyethylene fiber as a dual-components. The main research goal is to reveal the principles of concrete self-repairing. At first, the research investigates the fiber-reinforced-concrete behavior, the concrete self-repairing process with the Bacillus subtilis bacteria for forming bacterial-concrete. And then, the study highlights the damage-repairing numerical simulation of fiber-reinforced-bacterial-concrete. The research shows the bacterial-concrete benefits to durability and mechanical properties besides to the polyethylene fiber assistance to enhance post-cracking tensile resistance and the pre-peak elastic modulus of concrete. The novelty of the fiber-reinforced-bacterial-concrete is the matrix combined improvement of both basic material properties and the post-cracking deflection capacity.

Investigating Cracks Prevention in Concrete Utilizing the Self-Healing Concept of Bacillus Subtilis Bacteria

“…Thus created limestone 􀅫ills in any existing 􀅫issures. It is comparable to the natural healing process by which osteoblast cells mineralize to reform bone following a bone fracture [5,6].…”

Behavior of Macro-Synthetic Fiber-Reinforced High-Strength Concrete Beams Incorporating Bacillus subtilis Bacteria

“…The compressive strength of concrete was optimized at the B. subtilis bacteria cell concentration of 10 5 cells/ml of mixing water (increased by an average value of 23% at age 28 days). Moreover, the split tensile strength improved in a range of (13.7 -25.3%) (Ghoneim et al, 2020).…”

Aerobic non-ureolytic bacteria-based self-healing cementitious composites: a novel approach without added calcium precursor

“…Two types of bacteria are commonly used in MICP: ureolytic and non-ureolytic. In the ureolytic pathway, bacteria species such as Sporosarcina pasteurii [18] or Bacillus subtilis [19] were widely used, and the MICP relies on the enzymatic hydrolysis of urea to produce ammonia and carbon dioxide, leading to an increase in ambient pH and the formation of carbonate ions and calcium carbonate precipitation. However, this approach generates ammonia which may be harmful to the concrete and environment.…”