Distribution of mineralized carbonate and its quantification method in enzyme mediated calcite precipitation technique

摘要: Abstract This study discusses the possible application of enzyme mediated calcite precipitation, EMCP, as a soil-improvement technique. It explains experimental works on this EMCP The first part paper addresses different methods for quantifying amount precipitated within sand. Two methods, namely, thermal decomposition method and CO 2 volume evaluation method, are examined. These serve to evaluate distribution treated second procedures results drum-can experiments. Homogenous sand specimens, with diameter 57 cm height 60 cm, prepared inside steel drum-can. A grout solution, comprising urea, urease, CaCl , is injected into centre specimens. Subsequently, improved samples specimens collected their compressive strength evaluated. maximum measured unconfined 380 kPa. An attempt made relate mechanical properties EMCP-treated mineralized carbonate. obtained calcite-strength relation found be in close agreement previous literature.