Comparative Thermal and Mechanical Performance of Geopolymers derived from Metakaolin and Fly Ash
Comparative Thermal and Mechanical Performance of Geopolymers derived from Metakaolin and Fly Ash
复制标题
偏高岭土和粉煤灰地质聚合物的热性能和机械性能比较
DOI：
10.1061/(asce)mt.1943-5533.0001359
复制
发表时间：
2016-02
影响因子：
3.2
通讯作者：
Qi Shu Liang
中科院分区：
文献类型：
--
作者：
Zhang Hai Yan;Kodur Venkatesh;Wu Bo;Cao Liang;Qi Shu Liang
摘要本文介绍了由偏高岭土 (MK)、粉煤灰 (FA) 及其组合衍生的地质聚合物的热性能和机械性能比较。对三种类型的地质聚合物（MK、MK-FA 和 FA 基）进行了弯曲和压缩测试、热重分析、扫描电子显微镜和能量色散谱、压汞孔隙率测定法和膨胀测试，以评估比较机械性能、热行为和微观结构。这些测试结果表明，MK 基地质聚合物在暴露于高达 800°C 的高温后会出现显着的热收缩、大量质量损失和大幅强度下降。由于飞灰颗粒反应不完全，FA基地质聚合物在环境温度下表现出较低的弯曲和压缩强度，而在高温下保持较高的压缩强度，这是由于形成大尺寸孔隙作为释放蒸气压的通道和飞灰颗粒的烧结反应而促进的。
AbstractThis paper presents comparative thermal and mechanical performance of geopolymers derived from metakaolin (MK), fly ash (FA), and their combinations. Bending and compression tests, thermogravimetric analysis, scanning electron microscopy and energy dispersive spectrum, mercury intrusion porosimetry, and dilatometric tests were conducted on three types of geopolymers (MK, MK-FA, and FA based) to evaluate comparative mechanical properties, thermal behavior, and microstructure. Results from these tests show that MK-based geopolymers experience significant thermal shrinkage, high mass loss, and large strength degradation after exposure to high temperatures up to 800°C. FA-based geopolymers exhibit low bending and compressive strength at ambient temperature due to incomplete reaction of fly ash particles and high retention in compressive strength at high temperature, and this is facilitated from the formation of large size pores as channels to release vapor pressure and sinter reaction of fly ash parti...
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影响因子：
11.4
作者：
Bakharev, T
通讯作者：
Bakharev, T
影响因子：
3.9
作者：
Fernandez-Jimenez, Ana;Palomo, Angel;Martin, Antonia
通讯作者：
Martin, Antonia
DOI：
10.1007/bf01904446
发表时间：
1989-03-01
期刊：
JOURNAL OF THERMAL ANALYSIS
影响因子：
--
作者：
DAVIDOVITS, J
通讯作者：
DAVIDOVITS, J
影响因子：
5.2
作者：
Wang, Mei-Rong;Jia, De-Chang;Zhou, Yu
通讯作者：
Zhou, Yu
影响因子：
7.4
作者：
Rajamma, Rejini;Labrincha, Joao A.;Ferreira, Victor M.
通讯作者：
Ferreira, Victor M.