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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/1102


    Title: 卜作嵐材料抑制鹼-骨材反應之成效評估;The Effect Evaluation of Pozzolan Materials Mitigates Alkali-Aggregate Reaction.
    Authors: 邵國瑋;Kuo-Wei Shao
    Contributors: 土木工程研究所
    Keywords: 鹼-骨材反應;卜作嵐材料;抑制;alkali-aggregate reaction;pozzolan materials;mitigate
    Date: 2006-07-07
    Issue Date: 2009-09-18 17:20:22 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本研究針對高耐熱玻璃、海岸山脈安山岩與和平溪砂石,以爐灰、120級與100級水淬爐石取代水泥重量0%?55%,進行加速水泥砂漿棒試驗(ASTM C1567)、水泥砂漿棒試驗(ASTM C227)與混凝土角柱試驗試驗(ASTM C1293),評估卜作嵐材料抑制鹼-骨材反應之成效。 以爐灰和爐石抑制鹼-骨材反應,可以得到明顯的效果,取代水泥比例愈高,抑制效果愈佳,而抑制效果會因卜作嵐材料置換水泥的比例、卜作嵐材料種類、反應性骨材的種類及試體中的鹼含量不同而異。由ASTM C1293試驗結果顯示,鹼含量Na2Oeq.=2.0%時,海岸山脈安山岩的試體需要卜作嵐材料取代水泥30%,和平溪骨材需要卜作嵐材料取代水泥45%,可以將膨脹量抑制到危害門檻值以下。 由ASTM C1567和ASTM C1293試驗結果的比較,討論以加速水泥砂漿棒試驗結果得到能有效抑制鹼-骨材反應的卜作嵐材料用量,運用在實際混凝土構物是否也能有效抑制鹼-骨材反應。比較結果為:ASTM C1567試驗結果偏保守,所需卜作嵐材料比例偏高。當混凝土角柱試驗的鹼含量提高,則兩試驗相關性提高;當ASTM C1567判斷危害性的門檻值提高,則兩試驗的一致性提高;若ASTM C1567判斷危害性的齡期延長(齡期16天延長至28天或56天),則以第28天判斷齡期與ASTM C1293的試驗結果較為一致。 The study is mainly concerning with pyrex glass?coastal range andesites and Heping river aggregate, taking fly-ash slag powder?120 grade and 100grade ground granulated blast furnace slag to replace 0%~55% weight of cement, use of the acceleration mortar test(ASTM C1567)?mortar bar test(ASTM C227) and concrete prism test(ASTM C1293) to evaluate the effect of pozzolan materials mitigates the alkali-aggregate reaction. According to fly-ash slag powder and slag mitigate the alkali-aggregate reaction, we can see the obvious effects that when we use the higher proportion of cement replacement, the better mitigate effect, and the mitigate result would be different because of pozzolan materials change the proportion of the cement、types of pozzolan materials、types of reactive aggregate and alkali content of specimen. According to the testing result of ASTM C1293, when the alkali content Na2Oeq.=2.0%, the specimen of coastal range andesites needs the pozzolan materials to replace 30% of cement and Heping river aggregate needs the pozzolan materials to replace 45% of cement. It can make mitigate dilatability under the endanger threshold value. According to the comparison result of ASTM C1293 and ASTM C1567, we can know that the method of the acceleration mortar test can get pozzolan materials consumption to mitigate effectively alkali-aggregate reaction. If we use actual concrete structure, whether it mitigate usefully the alkali-aggregate reaction. The comparative result is: the testing result of ASTM C1567 is more conservative and the proportion of pozzolan materials is higher. When alkali content of concrete concrete prism test is increasing, the relative of this two tests is increasing. When endanger threshold value of ASTM C1567 is increasing, the consistency of this two tests is increasing. If the extension of the determine harmfulness of ASTM C1567 (age extend from 16 days to 28 days or 56 days), and determine age at 28 days is same as the testing result of ASTM C1293.
    Appears in Collections:[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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