A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Using microbial carbonate precipitation to improve the properties of recycled fine aggregate and mortar
Highlights Recycled fine aggregates (RFA) were modified by microbial carbonate precipitation (MCP). Proposed culture conditions for MCP by Sporosarcina pasteurii were recommended. The properties of mortar cast by modified RFA were improved.
Abstract This study investigates the use of microbial carbonate precipitation (MCP) by Sporosarcina pasteurii (S. pasteurii) to improve the properties of recycled fine aggregate (RFA). The factors influencing MCP are experimentally investigated. The recommended precipitation conditions for the pH, bacteria concentration, and calcium concentration are determined to be 9.5, 108 cells/mL, and 0.55 mol/L, respectively. Under these proposed conditions, the effects of MCP modification on RFA are also investigated and found the weight of modified RFA increases and the water absorption of modified RFA decreases. The flexural strength and compressive strength of mortar specimens cast by modified aggregate are improved. The result confirms the positive effects of MCP for improving the properties of RFA.
Using microbial carbonate precipitation to improve the properties of recycled fine aggregate and mortar
Highlights Recycled fine aggregates (RFA) were modified by microbial carbonate precipitation (MCP). Proposed culture conditions for MCP by Sporosarcina pasteurii were recommended. The properties of mortar cast by modified RFA were improved.
Abstract This study investigates the use of microbial carbonate precipitation (MCP) by Sporosarcina pasteurii (S. pasteurii) to improve the properties of recycled fine aggregate (RFA). The factors influencing MCP are experimentally investigated. The recommended precipitation conditions for the pH, bacteria concentration, and calcium concentration are determined to be 9.5, 108 cells/mL, and 0.55 mol/L, respectively. Under these proposed conditions, the effects of MCP modification on RFA are also investigated and found the weight of modified RFA increases and the water absorption of modified RFA decreases. The flexural strength and compressive strength of mortar specimens cast by modified aggregate are improved. The result confirms the positive effects of MCP for improving the properties of RFA.
Using microbial carbonate precipitation to improve the properties of recycled fine aggregate and mortar
Feng, Zhangyao (author) / Zhao, Yuxi (author) / Zeng, Weilai (author) / Lu, Zhenmei (author) / Shah, Surendra P. (author)
2019-09-12
Article (Journal)
Electronic Resource
English
Properties of Mortar Containing Recycled Fine Aggregate Modified by Microbial Mineralization
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