Bio-cementation improvement via CaCO3 cementation pattern and crystal polymorph: A review

Due to environmental and sustainable concerns, the green bio-cementation technique has received growing attentions from both the academic world and engineering field. One of its essential applications is ground improvement, since the precipitated CaCO3 crystals in bio-cementation process could act as the solid bridges to cement separated particles together and enhance the mechanical behaviors of soils. Although researchers have realized the significance of the precipitated CaCO3 bondings and microstructures of bio-cemented materials, only few studies focus on improving the bio-cementation efficiency from a microscopic perspective. Consequently, in this paper, an integrative review is adopted to collect, review, and analyze the published studies and literature, indicating that the CaCO3 cementation pattern and crystal polymorph are the two principal aspects that reflect the bio-cementation efficiency to a certain extent. Subsequently, the major factors affecting the CaCO3 cementation pattern and crystal poly morph are comprehensively discussed. In a nutshell, the conducted discussions in this paper attempt to provide noteworthy insights into bio-cementation improvement, which may potentially inspire future studies. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

This paper reviews the application of green bio-cementation technique in ground improvement, highlighting the importance of CaCO3 cementation pattern and crystal polymorph in reflecting the efficiency of bio-cementation. The study comprehensively discusses the major factors affecting these aspects, aiming to provide insights for future bio-cementation improvement studies.