| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight mortar which contains a binder and a filler and has the volume enlarged after kneading. SOLUTION: The lightweight mortar having a wetting time of 47 seconds is kneaded with the kneading water, a part of which infiltrates into other fillers, lightweight aggregate and binders, and the rest of which, as illustrated in the figure, does not infiltrates into precipitated calcium carbonate 1(one coated on the surface with stearic acid) as an unwettable filler but sheds water and then is successively kneaded, resulting in that the kneading water 2 is dispersed and surrounded with the unwettable filler to thereby have nowhere to go and not to thereby infiltrate into other fillers, lightweight aggregate and binders acting like a kind of a filler, therefore the lightweight mortar requires a large amount of the kneading water 2 in order to obtain the satisfactory flowability enough to wet these other fillers, lightweight aggregate and binders and to apply the lightweight mortar, consequently comes to have the enlarged volume. COPYRIGHT: (C)2006,JPO&NCIPI
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