Microbial Concrete Sealer

Portland Cement Concrete (PCC) is the most widely used construction material due to its versatility, durability, and economy (Mindess et al. 2003). However, PCC is also a quasi-brittle material that has low tensile strength and ductility, as well as weak resistance to the propagation of cracks. Also, problems related to shrinkage, durability and workability have caused a multitude of issues during construction. This research project builds on the work of Pitell et al. (2020). Its objective is to investigate the feasibility of mitigating the deterioration of deck, parapet, and substructure concrete by applying a bio-inspired mortar that instigates Microbially Induced Carbonate Precipitation (MCIP). Additionally, a testing procedure for applying the mortar is developed, and the effectiveness of the application regimen is assessed. This review is intended to introduce the current knowledge surrounding methods for application of MICP materials and improved test procedures to measure permeability. Health and safety issues are also be addressed. The full review is available online from the Pennsylvania Department of Transportation web site at https://www.penndot.pa.gov/ProjectAndPrograms/Planning/Research-And-Implementation/Documents/Microbial%20Concrete%20Sealer.pdf