Activación alcalina de cenizas volantes. Relación entre el desarrollo mecánico resistente y la composición química de la ceniza
Activación alcalina de cenizas volantes. Relación entre el desarrollo mecánico resistente y la composición química de la ceniza
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激活alcalina de cenizas volantes。
DOI：
10.3989/mc.2008.v58.i291.101
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发表时间：
2008
影响因子：
2.1
通讯作者：
Á. Palomo
中科院分区：
文献类型：
--
作者：
G. Kovalchuk;A. Fernández;Á. Palomo
碱活化粉煤灰是新一代高强度、耐用粘合剂的主要成分，具有优异的机械性能和耐久性（有时优于传统的波特兰水泥性能）。此外，这些水泥的发展可能有助于减少二氧化碳排放，因为基础材料是一种工业副产品。本研究旨在确定初始材料组成（SiO2/Al 2 O3和Na 2 O/Al 2 O3比）对反应产物的机械性能、性质和组成的影响。结果表明，这些比值与机械强度之间不存在线性关系，而是存在一系列最佳值，高于或低于这些值，强度下降。在本文研究的特定比例情况下，这些值为：SiO2/Al 2 O3 = 4.0和Na 2 O/Al 2 O3 = 1.0（摩尔比）。
Alkali-activated fly ash is the primary component of a new generation of high-strength, durable binders with excellent mechanical properties and durability (on occasion bettering traditional Portland cement performance). Moreover, development of these cements may contribute to mitigating CO 2 emissions, since the base material is an industrial by-product. The present study was conducted to determine the effect of the composition of the initial materials (SiO 2 /Al 2 O 3 and Na 2 O/Al 2 O 3 ratios) on the mechanical properties, nature and composition of the reaction products. The results obtained indicate that there is no linear relationship between these ratios and mechanical strength, but rather a series of optimal values above and below which strength declines. In the specific case of the ratios studied in the present paper, these values were: SiO 2 /Al 2 O 3 = 4.0 and Na 2 O/Al 2 O 3 = 1.0 (molar ratios).