Use of X-ray diffraction to quantify amorphous supplementary cementitious materials in anhydrous and hydrated blended cements
Use of X-ray diffraction to quantify amorphous supplementary cementitious materials in anhydrous and hydrated blended cements
复制标题
DOI：
10.1016/j.cemconres.2014.06.011
复制
发表时间：
2014-10-01
影响因子：
11.4
通讯作者：
Scrivener, K. L.
中科院分区：
文献类型：
--
作者：
Snellings, R.;Salze, A.;Scrivener, K. L.
无水和水合混合水泥中各种无定形辅助胶凝材料 (SCM) 的含量通过 PONKCS [1] X 射线衍射 (XRD) 方法进行定量。通过与一系列已知相组成和复杂性不断增加的混合物进行比较，评估了该方法的分析精度和准确度。 SCM 在与石英、无水波特兰水泥和水合波特兰水泥的混合物中实现了小于 2-3 wt.% 的 2 西格玛精度和优于 2 wt.% 的准确度。通过 XRD 测量的 SCM 在水合粘合剂中的反应程度是 1) 通过标准添加方法证实的内部一致，2) 通过等温传导量热法独立测量，显示出与累积放热量的线性相关性。优点、局限性参考现有测量混合水泥中 SCM 反应程度的方法，讨论了该方法的适用性。 (C) 2014 Elsevier Ltd. 保留所有权利。
The content of individual amorphous supplementary cementitious materials (SCMs) in anhydrous and hydrated blended cements was quantified by the PONKCS [1] X-ray diffraction (XRD) method. The analytical precision and accuracy of the method were assessed through comparison to a series of mixes of known phase composition and of increasing complexity. A 2 sigma precision smaller than 2-3 wt.% and an accuracy better than 2 wt.% were achieved for SCMs in mixes with quartz, anhydrous Portland cement, and hydrated Portland cement.The extent of reaction of SCMs in hydrating binders measured by XRD was 1) internally consistent as confirmed through the standard addition method and 2) showed a linear correlation to the cumulative heat release as measured independently by isothermal conduction calorimetry.The advantages, limitations and applicability of the method are discussed with reference to existing methods that measure the degree of reaction of SCMs in blended cements. (C) 2014 Elsevier Ltd. All rights reserved.