碱激发超细粉-粉煤灰胶凝材料压阻性能研究

doi:10.16552/j.cnki.issn1001-1625.2025.0294

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (9): 3288-3294.DOI: 10.16552/j.cnki.issn1001-1625.2025.0294

碱激发超细粉-粉煤灰胶凝材料压阻性能研究

孔伟鹏, 庞来学, 郭威, 田晓峰

山东交通学院交通土建工程学院,济南 250357

收稿日期:2025-03-19 修订日期:2025-04-20 出版日期:2025-09-15 发布日期:2025-09-19
通信作者: 庞来学,博士,教授。E-mail:lxpang@sdjtu.edu.cn
作者简介:孔伟鹏(1998—),男,硕士研究生。主要从事固废胶凝材料压阻性能的研究。E-mail:kongweipeg1@aliyun.com
基金资助:
山东省自然科学基金(ZR2020ME231);山东省重点扶持区域引进急需紧缺人才项目(2024031)

Piezoresistive Performance of Alkali-Activated Superfine Powder-Fly Ash Cementitious Materials

KONG Weipeng, PANG Laixue, GUO Wei, TIAN Xiaofeng

School of Civil Engineering, Shandong Jiaotong University, Jinan 250357, China

Received:2025-03-19 Revised:2025-04-20 Published:2025-09-15 Online:2025-09-19

摘要/Abstract

摘要： 以粉煤灰和超细粉为原材料,NaOH和Na₂SiO₃为碱激发剂,成功制备出一种新型碱激发胶凝材料,并对其压阻性能进行测试。结果表明,当养护龄期为28 d时,采用NaOH作为碱激发剂的碱激发胶凝材料的最大电阻率变化率为44.2%,而采用Na₂SiO₃作为碱激发剂的碱激发胶凝材料的最大电阻率变化率为54.2%。以Na₂SiO₃为碱激发剂的碱激发胶凝材料主要水化产物为托贝莫来石和水化硅酸钙凝胶,水化产物填充内部空隙,孔结构趋于密实化。电阻率变化率与压阻性能呈正相关,Na₂SiO₃体系的碱激发胶凝材料的电阻率变化率更大,因此压阻性能更好。

关键词: 碱激发胶凝材料, 粉煤灰, 超细粉, 水化产物, 压阻性能, 微观结构

Abstract: A novel alkali-activated cementitious material was successfully fabricated using fly ash and superfine powder as raw materials, while NaOH and Na₂SiO₃ were employed as alkali activators and its piezoresistive performance was tested. The results show that when the curing age reaches 28 d, the maximum resistivity change rate of alkali-activated cementitious material using NaOH as the alkali activator is 44.2%, whereas that for the material activated by Na₂SiO₃ is 54.2%. The main hydration products of alkali-activated cementitious material with Na₂SiO₃ as alkali activator is tobermorite and calcium silicate hydrate gel. The hydration products fill the internal voids, and the pore structure tends to be dense. The resistivity change rate is positively correlated with piezoresistive performance, the alkali-activated cementitious material of Na₂SiO₃ system has a greater resistivity change rate, therefore, its piezoresistive performance is better.

Key words: alkali-activated cementitious material, fly ash, superfine powder, hydration product, piezoresistive performance, microstructure

中图分类号:

TU528

孔伟鹏, 庞来学, 郭威, 田晓峰. 碱激发超细粉-粉煤灰胶凝材料压阻性能研究[J]. 硅酸盐通报, 2025, 44(9): 3288-3294.

KONG Weipeng, PANG Laixue, GUO Wei, TIAN Xiaofeng. Piezoresistive Performance of Alkali-Activated Superfine Powder-Fly Ash Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3288-3294.

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碱激发超细粉-粉煤灰胶凝材料压阻性能研究

Piezoresistive Performance of Alkali-Activated Superfine Powder-Fly Ash Cementitious Materials

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