#TITLE_ALTERNATIVE#

• Main Author: RAHAYU(NIM, SRI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17287
• Institution: Institut Teknologi Bandung

The weather of Indonesia with high rainfall makes the structure of concretes, mortar and monument easy to be degraded. The recent reparation and maintenance methods are quite successful, yet have few negative sides especially <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> in aesthetics value and surrounding environment. Hence, scientists develop new methods which are eco-friendly and do not worsen the visual appearance of the building. One of these methods is by utilizing bacterial activity which can produce CaCO3 precipitation. This method is well known as biomineralization or biodeposition. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> The objective of this study is to assess the effects of bio-mineralization on the properties of mortars. A bio-mineralized mortar was compared with an untreated mortar for analyzing the differences in their properties. One-day-old Bacillus sphaericus was used for the biomineralization process. The biomineralization obviously decreases the percentage of porosity and the average water permeability. In constrast, it increases the density and the compressive <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> strength of the mortar as well as the amount of calcite in the mortar.