Kaur Parampreet, Singh Varinder, Arora Amit
Department of Civil Engineering, Shaheed Bhagat Singh State University, Ferozepur, India.
Department of Civil Engineering, Guru Kashi University, Talwandi Sabo, Bathinda, Punjab, India.
Appl Biochem Biotechnol. 2022 Mar;194(3):1401-1416. doi: 10.1007/s12010-021-03604-x. Epub 2021 Oct 30.
In the ever-increasing demand of construction and construction materials worldwide, concrete is the most extensively used material for construction purposes almost next to the water. Therefore, there is a dire need of clean, green and durable concrete. Recently, an environmentally friendly strategy has been employed to manufacture bio-concrete by the usage of microorganisms in the traditional concrete to enhance its durability and compressive strength. In this review, we discuss the role of microbes in influencing the various properties of concrete such as compressive strength, flexural strength and tensile strength by reducing the concrete porosity and diminishing water absorption. The mechanism of microbial-induced calcium carbonate precipitation (MICP) in the traditional concrete by the action of microbes which resulted in the formation of bio-concrete as an improved building material has also been discussed. Additionally, an in-depth comparative analysis of the performance of bio-concrete with the traditional concrete synthesized from various industrial wastes such as silica fume, rice husk ash and metakaolin in terms of different properties such as compressive strength, flexural strength and percentage water absorption has been presented. This review highlights the impact of usage of microbes in the conventional concrete to produce novel and eco-friendly bio-concrete in construction technology.
在全球对建筑及建筑材料需求不断增长的情况下，混凝土几乎是仅次于水的使用最广泛的建筑材料。因此，对清洁、绿色且耐用的混凝土有着迫切需求。最近，一种环保策略被用于通过在传统混凝土中使用微生物来制造生物混凝土，以提高其耐久性和抗压强度。在这篇综述中，我们讨论了微生物通过降低混凝土孔隙率和减少吸水率来影响混凝土各种性能（如抗压强度、抗弯强度和抗拉强度）的作用。还讨论了微生物在传统混凝土中通过微生物诱导碳酸钙沉淀（MICP）作用导致形成生物混凝土作为一种改良建筑材料的机制。此外，还对生物混凝土与由硅灰、稻壳灰和偏高岭土等各种工业废料合成的传统混凝土在抗压强度、抗弯强度和吸水率百分比等不同性能方面的表现进行了深入比较分析。这篇综述突出了在传统混凝土中使用微生物对建筑技术中生产新型环保生物混凝土的影响。
