| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mortar based non-shrinkage grout material which is excellent in flowability before curing and workability and can be easily prepared.SOLUTION: There is provided a mortar composition containing cement, a fine aggregate and a water-reducing agent, where the water-reducing agent includes a polycarboxylic acid-based water-reducing agent and a naphthalene-based water-reducing agent and the use ratio of the naphthalene-based water-reducing agent to 100 pts.wt. of the polycarboxylic acid-based water-reducing agent is 15 to 900 pts.wt.</p> |
