1. Al Qabany A, Soga K (2013) Effect of chemical treatment used in MICP on engineering properties of cemented soils. Géotechnique 63(4):331
2. ASTM (2006) Standard practice for classification of soils for engineering purposes (Unified Soil Classification System). ASTM standard D2487. American Society for Testing and Materials. West Conshohocken, USA
3. ASTM (2014a) Standard test methods for maximum index density and unit weight of soils using a vibratory table. ASTM standard D4253. American Society for Testing and Materials. West Conshohocken, USA
4. ASTM (2014b) Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM standard D4254. American Society for Testing and Materials. West Conshohocken, USA
5. Cheng L, Cord-Ruwisch R (2012) In situ soil cementation with ureolytic bacteria by surface percolation. Ecol Eng 42:64–72