Investigating the influence of fly ash on the hydration behavior of cement using an electrochemical method

被引：20

作者：

Zhang, Jianchao ^{[1
,2
]}

Dong, Biqin ^{[2
]}

Hong, Shuxian ^{[2
]}

Teng, Xiaojuan ^{[2
]}

Li, Gui ^{[2
]}

Li, Weiwen ^{[2
]}

Tang, Luping ^{[2
,3
]}

Xing, Feng ^{[1
,2
]}

机构：

[1] China Earthquake Adm, Inst Engn Mech, Key Lab Earthquake Engn & Engn Vibrat, Harbin 150080, Heilongjiang, Peoples R China

[2] Shenzhen Univ, Key Lab Durabil Civil Engn Shenzhen, Guangdong Prov Key Lab Durabil Marine Civil Engn, Sch Civil Engn, Shenzhen 518060, Peoples R China

[3] Chalmers Univ Technol, Div Bldg Technol, S-41296 Gothenburg, Sweden

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 222卷

基金：

中国国家自然科学基金;

关键词：

Fly ash blended cement; Hydration process; Electrochemical impedance spectroscopy; Novel equivalent circuit model; Hydration degree; Compressive strength; IMPEDANCE SPECTROSCOPY; COMPRESSIVE STRENGTH; CARBONATION BEHAVIOR; ELECTRICAL-CONDUCTIVITY; CORROSION-RESISTANCE; REINFORCED-CONCRETE; BLENDED CEMENTS; PORE STRUCTURE; SILICA FUME; PASTE;

D O I：

10.1016/j.conbuildmat.2019.06.046

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Fly ash is an industrial by-product that is widely used in the cement industry. Traditional methods used to investigate the influence of fly ash on the hydration behavior of cement are destructive and cannot accomplish a continuous tracing of the hydration process. In this study, the influence of fly ash incorporation on the hydration process of cement is evaluated using measured electrochemical data obtained from the electrochemical impedance spectroscopy approach. A novel equivalent circuit model that considers the electrochemical characteristics of cement during the hydration process is proposed to investigate the electrochemical property of the blended cement The resistance parameter of the model, R-ct1, was found to have a positive correlation with hydration degree and compressive strength during hydration. With this parameter, the method can be used to non-destructively trace and characterize the effects of fly ash incorporation on the cement hydration process. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：41 / 48

页数：8

共 48 条

[1] CIRCUIT MODELS FOR CEMENT BASED MATERIALS OBTAINED FROM IMPEDANCE SPECTROSCOPY [J].