کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10285024 | 503551 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
As well known, sulfate and phosphate are widely used additives for MOC products. In this work, the influence of FeSO4 and KH2PO4 on the properties of magnesium oxychloride cement (MOC) such as compressive strength, water resistance, thermal stability, composition and micro structure were studied in detail by using material testing system (MTS), X-Ray diffraction (XRD), thermogravimetry and differential scanning calorimetry (TG-DSC), scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP), respectively. The results show that both FeSO4 and KH2PO4 incorporation can benefit the formation of gel-like 5Mg(OH)2·MgCl2·8H2O (P5) and the water resistance of MOC. However, the FeSO4 and KH2PO4 incorporation can downgrade the thermal stability and the mechanical strength. The influence of KH2PO4 is more obvious than that of FeSO4. In addition, the hindering hydration of MgO caused by sulfate and phosphate ions result in reduction of the hydration product, while the double hydrolysis reaction between Fe2+ and MgCO3 leads to slight increase of the resultant in the slurry of MOC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 102, Part 1, 15 January 2016, Pages 233-238
Journal: Construction and Building Materials - Volume 102, Part 1, 15 January 2016, Pages 233-238
نویسندگان
Ying Li, Zongjin Li, Huafu Pei, Hongfa Yu,