本文選題：堿骨料反應 + 偏高嶺土�。� 參考：《建筑材料學報》2017年06期

【摘要】：為研究偏高嶺土及粉煤灰對活性骨料膨脹的抑制作用及機理,采用快速砂漿棒法,研究了用石英玻璃為骨料,以5%,10%,15%,20%,25%高活性偏高嶺土等質量取代水泥或以10%,20%,30%,35%,40%,45%粉煤灰等質量取代水泥的砂漿棒膨脹率,并采用掃描電鏡對其機理進行了分析.結果表明:高活性偏高嶺土抑制堿骨料反應(ASR)具有少量高效的特點,而粉煤灰要在等質量取代水泥35%及以上時才能有效抑制ASR;高活性偏高嶺土顆粒明顯小于粉煤灰顆粒,且具有更高的活性,摻入水泥砂漿后所生成的膠凝材料更加致密.
[Abstract]:In order to study the inhibitory effect and mechanism of metakaolin and fly ash on the expansion of active aggregate, the quartz glass as aggregate was studied by rapid mortar rod method.The mortar bar expansion rate of the cement was replaced by 25% high active metakaolin, or the cement was replaced by the mass of 10% 10% 10% high active metakaolin, or by 10% 10% 30% 30% fly ash and 45% fly ash, and its mechanism was analyzed by means of scanning electron microscope (SEM).The results show that high activity metakaolin has a small amount of high efficiency in inhibiting alkali aggregate reaction, and fly ash can effectively inhibit ASR only when the cement is replaced by 35% or more of the same mass, and the high activity metakaolin particle is obviously smaller than the fly ash particle.Moreover, it has higher activity and compactness of cementing material after adding cement mortar.
【作者單位】： 西南交通大學土木工程學院;
【基金】：國家自然科學基金資助項目(51308471) 中央高�；究蒲袠I(yè)務費專項資金資助項目(2682015ZD13)
【分類號】：TU528
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本文編號：1740674