کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
257810 503601 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of magnesium hydroxide content and fineness on the carbonation of calcium hydroxide
ترجمه فارسی عنوان
تأثیر محتوای هیدروکسید منیزیم و ریز دانه بر کربنات هیدروکسید کلسیم
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Magnesium and calcium are widespread in nature.
• Mineral carbonation is becoming a effective method in reusing waste mineral.
• Calcium to magnesium mole ratio is a key parameter in this study.
• Thermogravimetric analysis has been used in this study.
• Thermogravimetric analysis is an useful method on the calculation of carbonation efficiency.

Accelerated carbonation material is a kind of air hardening cementitious materials. The influence of magnesium content on the properties of carbonate binder, such as compressive strength, CO2 mass gain degree and products morphology, were investigated. Solid state carbonation method that low water to solid ratio (W/S) of 0.10 was performed in this study. The samples were prepared at a range of compaction pressures (0 MPa–8.0 MPa). And then the samples were exposed at a constant CO2 gas pressure (0.2 MPa) for different carbonation time. The result showed that different calcium to magnesium mole (C/M) ratios has a significant impact on compressive strength and CO2 mass gain degree of samples. The CO2 mass gain degree increased at first, reached the maximum, and then decreased with the increasing C/M ratio. The C/M ratio of that CO2 mass gain degree reached the maximum was 5. The compressive strength not only changed by magnesium content but also influenced by the fineness of magnesium hydroxide, more finer practical size more higher compressive strength. SEM photographs showed that the morphology of carbonated products changed by different compaction pressures and content of magnesium hydroxide.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 55, 31 March 2014, Pages 82–88
نویسندگان
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