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題 名 | 環境因素對以水淬爐石粉抑制鹼質與粒料反應之成效影響研究=Effect of Environments on Elimination of Alkali-Aggregate Reaction by Slag Replacement |
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作 者 | 李釗; 許書王; 陳桂清; 謝文凱; 羅一傑; | 書刊名 | 港灣技術 |
卷 期 | 14 1999.06[民88.06] |
頁 次 | 頁71-90 |
分類號 | 440.327 |
關鍵詞 | 鹼質與粒料反應; 砂漿棒; 活性骨材; 水淬爐石; 含鹼量; Alkali-aggregate reaction; Mortar bar; Reactive aggregate; Blast furnace slag; Alkali content; |
語 文 | 中文(Chinese) |
中文摘要 | 緣於國內目前已有鹼質與粒料反應之案例,以及混凝土構造物發生鹼質粒反應可能帶來的嚴重後果,為探求抑制鹼質與粒料反應之本土化成效,本研究嘗試以本土的水淬爐石粉、本土活性粒料,以及國內產製之水泥,針對本島之環境特性,進行抑制制鹼質與粒料反應之研究,探討水泥含鹼量與環境因素對以水淬爐石抑制鹼質與粒料反應之成效影響,期望發展有效的抑制鹼質與粒料反應策略,並增加水淬爐石的資源應用。 研究結果顯示混凝土中鹼質與粒料反應的膨脹量隨含鹼量增加而增大。若未添加水淬爐石,浸泡在相當海水濃度和高於海水濃度的鹽水中,其試體膨脹量大於養治在100%相對濕度環境的試體膨脹量。養治在100%相對溼度環境的試體膨脹量,大於浸泡在清中的試體膨脹量。以水淬爐石粉取代部份水泥有抑制鹼質與粒料反應的效果,其抑制成效隨爐石取代量增加而改善,若水淬爐石粉取代60%以上水泥時,有較可靠的抑制鹼質與粒料反應成效。 |
英文摘要 | The cases of concrete deterioration due to alkali-aggregate reaction(AAR) have found in Taiwan. They may induce disasters. Local reactive aggregate, blast furnace slag, and cement were used to study the strategy of eliminating AAR in Taiwan in consideration of local environments. Effects of cement alkali content and environmental factors on mortar bar expansion were investigated. Test results showed that the amount of mortar bar expansion increased with increasing the cement alkali content. For the mortar bar without slag addition, the expansion of sea water soaked mortar bar was greater than the mortar cured in 100% relative humidity. The expansion of 100% relative humidity cured mortar bar was greater than the mortar bar soaked in clean water. Replacement of a part of cement by slag could reduce the amount of expansion due to AAR. The efficiency of eliminating expansion was improved with increasing the percentage of slag replacement. Replacement of more than 60% cement by slag was satisfactory to eliminate deterioration due to AAR. |
本系統中英文摘要資訊取自各篇刊載內容。