Performance of Bacillus tropicus on Mechanical,Durable and Crack Remediation Properties in Sustainable Vermiculite Concrete

作     者：Anbazhagan Rajesh Venkatesh Sri Hariny Arunachalam Sumathi Anbazhagan Rajesh;Venkatesh Sri Hariny;Arunachalam Sumathi

作者机构：School of Civil EngineeringSASTRA Deemed to be UniversityThirumalaisamudramThanjavurTamilnadu613401India 

出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)

年 卷 期：2024年第21卷第4期

页      面：1987-1999页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：The authors wish to acknowledge Dr Saranaathan SE  senior assistant professor from school of civil engineering of SASTRA Deemed to be University for rendering microscope facilities from geology museum for concrete crack width measurement 

主　　题：Bacillus tropicus Vermiculite Ground granulated blast furnace slag Mechanical properties Durable properties Crack healing Microstructural characterization 

摘      要：Sustainable cement-based concrete materials are primarily used for construction,among which vermiculite as lightweight fine aggregate gains more future development ***,a bacterial solution was sprayed over vermiculite and wrapped using calcium sulphoaluminate(CSA)cement to replace with fine aggregate in ***,based on a preliminary test on compressive strength results,10%of Ground Granulated Blast Furnace Slag(GGBS)and a healing solution proportion of 9:1 was selected for preparing self-healing *** fine aggregate was replaced in concrete using vermiculite in 0%,5%,10%and 15%and the findings suggest that bacterial vermiculite replacement should be at most 5%to achieve better results in strength and durable *** strength enhancement observed for compressive strength,strength regain,split tensile strength,flexural strength,and ultrasonic pulse velocity were 29.22%,45.5%,34.02%,28.03%and 41.4%*** crack healing at 7,14 and 28 days of BIVC was 38.23%,58.82%and 79.41%,which is 3–4%lower than internal crack *** analysis by Scanning Electron Microscopy(SEM),X-Ray Diffractometer(XRD),and Energy Dispersive Spectroscopy(EDS)reveals the existence of calcite,and it was formed due to the bio-mineral action of bacteria with available nutrients in sustainable concrete.