論文・報告
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産業副産物系の混和材と細骨材を用いて、超低収縮と超高強度を達成したモルタルを開発し、各種性能について市販の超高強度型および一般用無収縮モルタルと比較した。その結果、市販の超高強度型無収縮モルタルに比べても強度が高く、かつ、乾燥収縮ひずみと自己収縮ひずみの両方が非常に小さいことが分かった。中性化、凍結融解および塩化物イオンの浸透に対する抵抗性も市販の無収縮モルタルと同等以上であった。プレキャストセグメント接合目地模型への充填性が良好であること、硬化後のひび割れが市販の無収縮モルタルに比べて大幅に少ないことを確認し、実橋のプレキャストセグメント接合目地へ適用し良好な結果を得た。 キーワード: 無収縮モルタル、超低収縮、超高強度、高耐久性、セグメント接合目地 |
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Ultra-low shrinkage and ultra-high strength mortar using industrial by-product SCMs and fine aggregate was developed and its performance was compared with commonly used commercial ultra-highstrength type and general type non-shrink mortars. It was confirmed that developed mortar's compressive strength is higher and both drying and autogenous shrinkage are extremely lower than compared non-shrink mortars. Also, it's resistance to carbonation, freezing and thawing, and chloride ions penetration were equivalent or higher than them. Furthermore, the applicability of developed mortar to precast segment joint part was confirmed. In particular; there were significant fewer cracks and sufficient filling performance than compared non-shrink mortar. Through these investigations, developed mortar was applied to precast segment joint part of actual bridge and successful results could be obtained. Key Words: Non-shrink mortar, Ultra-low shrinkage, Ultra-high strength, High durability, Segment joints |
論文