台灣位處太平洋與台灣海峽之間，四面環海，氣候潮濕，使得沿岸鋼筋混凝土建築物易因劣化因子滲透至混凝土內部產生劣化，導致混凝土開裂或鋼筋腐蝕。在台灣經常運用斷面修補工法來修補劣化情況，常見的修補材料有水泥砂漿、聚合水泥砂漿及聚合樹脂砂漿。本次研究使用聚合水泥砂漿作為修補材料，其具有良好的黏結強度，可使修補材料的力學性質充分發揮以提高耐久性。然而，其成本較水泥砂漿高而降低業界使用之意願，故於試體中添加飛灰取代水泥，以降低成本，同時提高斷面修補材的耐久性。試驗中使用丁苯橡膠(SBR)作為聚合材料拌合於飛灰砂漿中，探討其施工性及對力學性質之影響。
本研究改變飛灰添加量、SBR劑量與型態、水膠比，比較施工性及強度，並探討粉狀及乳液狀SBR對於黏結強度的影響。同時參照日本建築防災協會「続繊維補強材を用いた既存RC 造およびSRC 造建築物の耐震改修設計・施工指針」所建議修補材料品質規定，判別本次研究之配比是否符合相關要求。
研究結果可知，添加不同型態的SBR後會有不同的力學行為。此外，添加飛灰雖會降低早期強度，但其強度會隨時間提升，且乾燥收縮量也有明顯改善。

Taiwan is surrounded by sea so that chloride induced steel corrosion is one the reasons which lead reinforced concrete (RC) structures to deteriorate. To repair this kind of deteriorated RC structures, patch repair is one of the common method used in Taiwan. Although the polymer-modified cement mortar (PCM) shows better performance on bonding strength to make the repair materials to perform well, the cost of PCM is higher than ordinary Portland cement mortar (OCM) so that it is used widely in Taiwan. To avoid this issue, fly ash which is a byproduct in thermal power planet is utilized in this study. However, the fly ash not only reduces the cost of repair material but its pozzolanic properties provide good durability, decrease the dry shrinkage, increase the long-term strength and so on. The polymer used in this research is Styrene-butadiene rubber (SBR). It is a kind of polymer used in repair material often.
There are six series in this research, including properties of mixing fly ash in OCM, amounts of SBR emulsion mixing in repair material, effects of the W/B ratio in the repair material, companions between the usage of by using emulsion SBR and powder SBR and the bond strength of repair material. Therefore, the results would be compared with the Japanese patch repair materials specifications to determine whether the mix proportions used in this study meet the requirements or not.
According to results, it was found that mixing fly ash in the mortar would reduce the early-age strength but it could improve the long-term age strength and reduce the dry shrinkage. In addition, the mechanical properties of different types SBR and both of these SBR’s are able to improve the bond strength of found in this study.

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