Effect of TEA on fly ash solubility and early age strength of mortar
Effect of TEA on fly ash solubility and early age strength of mortar
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DOI：
10.1016/j.cemconres.2009.09.030
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发表时间：
2010-03-01
影响因子：
11.4
通讯作者：
Bujauskaite, G.
中科院分区：
文献类型：
--
作者：
Heinz, D.;Goebel, M.;Bujauskaite, G.
研究重点是粉煤灰在碱性溶液中的溶解行为以及添加三乙醇胺（TEA）的影响。 TEA 被称为水泥生产中的助磨剂，是一种 Al 和 Fe 螯合剂。为了确定 TEA 对飞灰成分溶解行为的影响，将飞灰与 pH 13 的 KOH 溶液和不同剂量的 TEA 混合。在不同时间后取样并通过 ICP-OES 进行分析。使用等温量热法研究了 TEA 对粉煤灰水泥浆体放热速率的影响。还进行了强度测试，以研究 TEA 对普通波特兰水泥和粉煤灰/水泥砂浆的影响。研究发现 TEA 可以提高飞灰中 Al、Ca 和 Fe 的溶解速率。对于飞灰水泥，观察到对放热速率和早期强度增加的轻微但可重复的影响。 (C) 2009 Elsevier Ltd. 保留所有权利。
The investigations focused on the dissolution behaviour of fly ash in alkaline solution and the effect of triethanolamine (TEA) addition. TEA is known as a grinding aid in cement production and is an Al and Fe chelating agent. To determine the effect of TEA on the dissolution behaviour of fly ash constituents, fly ash was mixed with a KOH solution at pH 13 and different dosages of TEA. Samples were taken after different times and analysed by ICP-OES. The effect of TEA on the heat evolution rates of fly ash cement pastes was investigated using isothermal calorimetry. Strength tests were also conducted to investigate the effect of TEA on plain Portland cement and fly ash/cement mortars. TEA was found to increase the dissolution rate of Al, Ca and Fe from fly ash. A slight, but reproducible, effect on heat evolution rates and an increase in early age strength was observed for fly ash cements. (C) 2009 Elsevier Ltd. All rights reserved.