Description

Although concrete is the most widely used building material in the world, its limited tensile strength makes cracking a common phenomenon in concrete elements. This study investigates the potential of autonomous self-healing as an eco-friendly and lowcost method to increase the durability of concrete. The crack-healing potential of different types of high-alkaline-tolerant bacteria or calcite-precipitation microorganisms is investigated. High-alkaline-tolerant bacteria and calcite-precipitation microorganisms were used to retrofit lab-fractured concrete samples. The samples healed with each of these bacteria groups were cast and tested under compressive load up to failure to measure the compressive strength of the concrete samples. The outcomes of experimental tests on concrete samples healed with biological processes demonstrate how this technique can be implemented when retrofitting durability-enhanced, eco-friendly concrete structures to improve the strength of durability of the material and ultimately improve the durability of many forms of concrete infrastructure.

Publication Date

5-2023

Publication Type

Report

Topic

Transportation Engineering

Digital Object Identifier

10.31979/mti.2023.2239

MTI Project

2239

Keywords

Self-healing concrete, Bacteria-based self-healing, Durability of concrete structures, Experimental tests

Disciplines

Construction Engineering and Management | Industrial Engineering | Transportation | Transportation Engineering

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