| 摘要 |
PROBLEM TO BE SOLVED: To degas the air of a working face and obtain a smooth surface scarcely having bubbling trace by laying a self-leveling floor material after aqueous solution of surfactant having specific surface tension is applied on the working face. SOLUTION: An aqueous solution is obtained from a surfactant whose surface tension is 65-15 mN/m, after spray is applied on a concrete face after hardening, a self-leveling material is poured, and hardening is performed without smoothing with trowel. The air of the working face is degassed by applying surfactant aqueous solution on the working face of a concrete slab or the like, and the smooth surface scarcely having bubbling trace can be obtained. In other words, the permeation effect of the self-leveling material are expressed by lowering interface tension between the working face and the self-leveling material, degassing action is improved, and adhesion with a finishing member is excellent.
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