| 摘要 |
PROBLEM TO BE SOLVED: To provide mortar, which is excellent in workability, because it is long in working life, and little in variation of fluidity within the working life, superquick in hardening, and capable of early releasing. SOLUTION: The mortar has a flow value prescribed in JASS15M-103 of >=210 mm for at least 60 min. from pouring water, and Shore hardness after 6 hours from kneading of the mortar of >=40.
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