| 摘要 |
PURPOSE: A water-tight processing method for concrete surfaces using microbial culture medium which contains calcium acetate is provided to enhance water-tightness, intensity, and durability of the concrete by precipitating calcium carbonate crystal within air gaps of a concrete surface. CONSTITUTION: A water-tight processing method for concrete surfaces using microbial culture medium which contains calcium acetate comprises the following steps: preparing a culture medium for cultivating urea decomposing microorganisms by adding 2.2g/L of NaHCO3 L, 10g/L of ammonium chloride and 10g/L of urea to water; making a saturated culture medium by cultivating microorganisms in the culture medium; making a calcium-added culture medium by adding calcium acetate to the saturated culture medium; and precipitating calcium carbonate crystallization(31) in air gaps(11) of a concrete surface by contacting a target watertight processed concrete(10) surface with the calcium added culture medium. |
