| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic composition for extrusion molding that can make a curing time shortened as it has a low setting retardance for cement, is unlikely to cause a thermal gelation even at high temperatures, and is excellent in extrusion moldability.SOLUTION: A hydraulic composition for extrusion molding is a composition comprising: a water soluble hydroxyalkyl alkyl cellulose; a cement; an aggregate; a reinforcement fiber; and water. Here, a substitution degree by the alkyl groups of the water soluble hydroxyalkyl alkyl cellulose is 1.2-1.7, the sum of the substitution degree by the alkyl groups and a substituted molar number by the hydroxyalkyl groups is 1.5-2.0, and a percentage of glucose rings that are not substituted by alkyl groups and hydroxyalkyl groups per glucose ring unit is less than or equal to 10 mol%. According to the invention, it is possible to shorten the curing time and to obtain a hydraulic composition for extrusion molding which is excellent in extrusion moldability even under a condition where a temperature of the composition is high. |
