Bacterial technology-enabled cementitious composites: A review

• Main Authors: Li, L., Zheng, Q., Li, Z., Ashour, Ashraf F., Han, B.
• Language: en
• Published: Elsevier 2019
• Subjects: Bacterial induced calcium carbonate precipitation; Principle of technology-enabled cementitious composites; Mechanical properties and durability
• Online Access: http://hdl.handle.net/10454/17127

Yes === Cementitious composites are generally brittle and develop considerable tension cracks, resulting in corrosion of steel reinforcement and compromising structural durability. With careful selection and treatment, some kinds of bacteria are able to precipitate calcium carbonate and ‘heal’ cracks in cementitious composites through their metabolism, namely bacterial activity. It is envisioned that the bacterial technology-enabled cementitious composites could have great potential for engineering applications such as surface treatment, crack repair and self-healing construction material. This paper presents the state-of-the-art development of bacterial technology-enabled cementitious composites from the following aspects: mechanisms of bacterial induced calcium carbonate precipitation; methods of applying bacteria into cementitious composites; mechanical properties, durability and their influencing factors; various applications; cost effective analysis and prospect. The paper concludes with an outline of some future opportunities and challenges in the application of bacterial technology-enabled cementitious composites in construction. === National Science Foundation of China (51578110) and the Fundamental Research Funds for the Central Universities in China (DUT18GJ203).