罗树琼, 赵明慧, 葛亚丽,等.微波水热合成粉煤灰基托贝莫来石[J].河南理工大学学报（自然科学版）,2023,42(5):183-189.

LUO S Q, ZHAO M H, GE Y L, et al.Microwave hydrothermal synthesis of fly ash based tobermorite[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(5):183-189.

微波水热合成粉煤灰基托贝莫来石

罗树琼1, 赵明慧1, 葛亚丽1, 常金丹3, 杨雷1, 谢玉芬1, 毛宇翔2

1.河南理工大学 材料科学与工程学院 河南省深地材料科学与技术重点实验室 绿色高性能建筑材料河南省杰出外籍科学家工作室，河南 焦作  454000;2.河南理工大学 资源环境学院，河南 焦作  454000;3.山西长平煤业有限责任公司，山西 晋城  048000

摘要:为了解决传统水热合成粉煤灰基托贝莫来石时间长、能耗高的问题，提出使用微波水热合成粉煤灰基托贝莫来石。以粉煤灰、氢氧化钙为原料，在Ca和Al+Si摩尔比0.83、液固比30 mL/g、合成温度220 ℃的条件进行微波与传统水热合成试验，并进行XRD，SEM，FTIR，N₂吸附测试。结果表明，微波与传统水热合成的主要产物均为铝代托贝莫来石，呈长片状。与传统水热合成产物相比较，微波水热合成产物平均孔径较小、比表面积大，合成时间仅为传统水热合成时间的一半。因此，采用微波水热合成粉煤灰基托贝莫来石更具优势，为微波蒸压技术制备以托贝莫来石为主要水化产物的加气混凝土提供了技术指导和理论参考。

关键词:微波;水热合成;粉煤灰;托贝莫来石

doi:10.16186/j.cnki.1673-9787.2021120053

基金项目:国家自然科学基金资助项目（51808196）；河南理工大学博士基金资助项目（B2021-15）；河南理工大学博士后基金资助项目（672108/106）；宁波市科技创新2025重大专项项目（2019B10049，2020Z040）；河南理工大学新工科教改项目（672307/111/039）

收稿日期:2021/12/17

修回日期:2022/02/21

出版日期:2023/09/25

Microwave hydrothermal synthesis of fly ash based tobermorite

LUO Shuqiong1, ZHAO Minghui1, GE Yali1, CHANG Jindan3, YANG Lei1, XIE Yufen1, MAO Yuxiang2

1.School of Materials Science and Engineering，Henan Polytechnic University，Henan Key Laboratory of Materials on Deep-Earth Engineering，Henan Outstanding Foreign Scientists Studio of Green High-performance Building Materials，Jiaozuo  454000，Henan，China;2.School of Resources ＆ Environment，Henan Polytechnic University，Jiaozuo  454000，Henan，China;3.Shanxi Changping Coal Industry Co.，Ltd.，Jincheng  048000，Shanxi，China

Abstract:In order to solve the issues including long time and high energy consumption of traditional hydrothermal synthesis of fly ash based tobermorite，microwave hydrothermal synthesis of fly ash based tobermorite was proposed. Fly ash and calcium hydroxide were used as raw materials，microwave and traditional hydrothermal synthesis experiments were carried out under the conditions of Ca/（Al+Si） molar ratio at 0.83，liquid-solid ratio of 30 ml/g and synthesis temperature of 220 ℃. Following this，XRD，SEM，FTIR and N₂ adsorption tests were conducted. Results showed that the main products obtained by either microwave or traditional hydrothermal synthesis were aluminum substituted tobermorite in long flakes. Compared with the products synthesized by traditional hydrothermal condition，the products synthesised by microwave hydrothermal condition had smaller average pore size and larger specific surface area. In addition，the synthesis time was only half of the traditional hydrothermal synthesis time. Therefore，fly ash based tobermorite obtained under microwave hydrothermal condition had more advantages. This could provide some technical guidance and theoretical reference for preparing aerated concrete with tobermorite as the main hydration product using microwave autoclaved technology.

Key words:microwave;hydrothermal synthesis;fly ash;tobermorite

微波水热合成粉煤灰基托贝莫来石_罗树琼.pdf