Optimizing compressive strength of sand treated with MICP using response surface methodology

Abstract

Highlights Microbiologically induced calcium carbonate precipitation can be used to produce artificial sandstone Compressive strength of artificial sandstone is dependent on urea and calcium-ion concentration. An optimum exists for nearly equimolar concentrations of urea und calcium-ions High concentration of calcium-ions inhibits calcium carbonate precipitation and therefore compressive strength of sandstone

Keywords

• Microbiologically induced calcium carbonate precipitation (MICP)
• Sporosarcina pasteurii
• Response surface methodology
• Central composite design
• Biosandstone