台灣地區粒料在混凝土中鹼質與碳酸鹽反應活性之研究

Reactivity Study of the Concrete Aggregate to Induce Alkali-Carbonate Reaction in Taiwan

李釗(Chau Lee) ； 劉志堅(Chih-Chien Liu) ； 王韡蒨(Wei-Chien Wang) ； 王年福(Nian-Fu Wang)

《中國土木水利工程學刊》 21卷1期 (2009/03) Pp. 73-82

https://doi.org/10.6652/JoCICHE.200903_21(1).0007

摘要

本研究探討台灣地區的碳酸鹽粒料在混凝土中發生鹼質與碳酸鹽反應(ACR)的活性，及評估適合本土的粒料活性檢驗方法。XRD試驗的結果顯示，37種研究粒料的礦物組成以方解石及白雲石為主，其中多數亦含有石英成份。試驗結果顯示ASTM C1105為適合長期準確評估碳酸鹽粒料活性的方法，CSA A23.2-26A、RILEMAAR-5單一試驗及蒸壓法等，不適合做為台灣地區快速ACR檢測工具；而ASTMC586或RILEM AAR-5判斷程序的檢驗結果，可作為初期快速篩選粒料ACR活性的檢測工具。若粒料經ASTM C586或RILEM AAR-5判斷程序試驗初步判定不具ACR活性，可直接做工程應用；若判定具ACR活性，則建議再進行ASTM C1105試驗做最終確認。

關鍵字

石灰岩 ； 鹼碳酸鹽反應 ； 混凝土 ； 砂漿

並列摘要

This paper studies the ACR reactivity of the carbonate aggregates in Taiwan. The results of XRD show that the mineral constituents of aggregates are mainly calcite and dolomite and the majority including quartz. The aggregates with ACR reactivity according to the results of ASTM C1105 are distributed in the area between Heping River and Siouguluan River. The results of CSA A23.2-26A and RILEM AAR-5 result of single test and autoclave test are not consistent with the results of ASTM C1105, while the results of ASTM C586 and RILEM AAR-5 determining procedure of ACR are consistent with the conclusions according to ASTM C1105. In practical, ASTM C586 or RILEM AAR-5 can be used to identify the ACR non-reactive aggregates first in Taiwan, and then the reactivity of ”reactive ACR aggregate” can be confirmed by ASTM C1105.

並列關鍵字

limestone ； alkali-carbonate reaction ； concrete ； mortar