| 摘要 |
PURPOSE:To provide the titled soil-hardening agent which is an alkaline mixture obtained by adding less than specific amount of a cobalt chloride complex compound to an aqueous solution of an alkali metal salt, and gives a hardened soil having excellent strength and elastic modulus and resistant to cracking when used in combination with cement. CONSTITUTION:The objective agent is a mixture having alkaline nature (preferably 9-12pH) and obtained by adding <=4(wt)%, preferably 0.1-0.5% cobalt chloride complex compound (preferably a cobalt chloride ammine complex compound produced by the reaction of ammonium chloride, an alkali metal carbonate, cobalt chloride and oxygen) to an aqueous solution of an alkali metal salt (preferably a combination of sodium carbonate, potassium carbonate and sodium chloride). |
