高溫燒結含矽質再生材料在水泥基質中的潛在鹼－矽反應膨脹行為研究

Research on the Expansion Behavior of Containing Silica Recycled Materials after High Temperature Sintering in Cement Matrix

王韡蒨(Wei-Chien Wang) ； 劉志堅(Chih-Chien Liu) ； 李釗(Chau Lee) ； 許書王(Shu-Wang Hsu)

《中國土木水利工程學刊》 25卷1期 (2013/03) Pp. 9-20

https://doi.org/10.6652/JoCICHE.201303_25(1).0002

摘要

本研究探討高溫燒結含矽質材料再生運用於混凝土的潛在ASR膨脹問題，以ASTM方法評估再生粒料的ASR活性、分析峰脹效應及卜作嵐材料對ASR的抑制效果。結果顯示，TFT玻璃、陶瓷砂及殼模砂具ASR活性。TFT玻璃及陶瓷砂的峰脹含鹼當量分別為1.5～2.0%及1.25～2.0% Na2Oeq，殼模砂無此效應。陶瓷砂及殼模砂的峰脹粒徑分別為1.18～2.36及0.15～0.30 mm，TFT玻璃無此效應。TFT玻璃無峰脹取代比例，但陶瓷砂及殼模砂的峰脹取代比例分別為50%及30%。使用低鹼水泥可抑制再生粒料的ASR膨脹。有效抑制再生粒料ASR膨脹的飛灰重量取代水泥量，分別為15%、15%及20%；水淬爐石粉則分別為60%、40%及60%。

關鍵字

鹼－矽反應 ； 再生粒料 ； 峰脹效應 ； 卜作嵐材料

並列摘要

This research discusses the potential ASR problem for the recycled aggregates of sintered by high temperature procedure (RAs). Using ASTM methods assess the ASR reactivity of RAs, analyze pessimum effects, and discuss the inhibiting effect for pozzolanic material on ASR problem of RAs. Results show that TFT glasses, ceramic sands and cast sands are ASR reactive aggregates. The pessimum cement alkali equivalent content of TFT glasses and ceramic sands are 1.5 ~ 2.0% and 1.25 ~ 2.0%, respectively, and cast sands is not observed this effect. Ceramic sands and cast sands have the pessimum aggregate sizes of 1.18 ~ 2.36 and 0.15 ~ 0.30 mm, and TFT glasses have not this effect. TFT glasses have not the pessimum replaced proportion, but ceramic sands and cast sands have the pessimum replaced proportions of 50% and 30%. Using low-alkali cement can inhibit the ASR expansion of RAs. The harmful ASR expansion of RAs can be inhibited effectively when using fly ash replaces cement of 15%, 15% and 20% by weight, or using the blast furnace slag of 60%, 40% and 60% by weight, respectively.

並列關鍵字

alkali-silica reaction ； recycled aggregate ； pessimum effect ； pozzonalic material