[1]李美利,徐姗姗,钱觉时,等.电阻率法用于高性能混凝土养护程度的评价[J].郑州大学学报(工学版),2009,30(01):106-110.
　LI Meili,XU Shanshan,QIAN Jueshi,et al.The Resistivity Method is Used to Evaluate The Curing Degree of High-performance Concrete[J].Journal of Zhengzhou University (Engineering Science),2009,30(01):106-110.
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电阻率法用于高性能混凝土养护程度的评价()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
30
期数:
2009年01期
页码:
106-110
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
The Resistivity Method is Used to Evaluate The Curing Degree of High-performance Concrete
作者:
李美利; 徐姗姗; 钱觉时; 等.
重庆大学,材料科学与工程学院,重庆,400045, 重庆大学,材料科学与工程学院,重庆,400045, 重庆大学,材料科学与工程学院,重庆,400045, 重庆大学,材料科学与工程学院,重庆,400045
Author(s):
LI Meili; XU Shanshan; QIAN Jueshi; etc
College of Materials Science and Engineering，Chongqing University，Chongqing 400045，China
关键词:
电阻率;  评价;  养护;  高性能混凝土
Keywords:
resistivity;  evaluation;  conservation;  High-performance concrete
文献标志码:
A
摘要:
提出了一种新的用于判断混凝土养护程度的电阻率法:采用内置铜电极和改进电阻率测量方法,选取自然养护、标准养护、水中养护3种典型的养护制度,通过不同深度的电阻率变化来反应混凝土内部的湿度梯度变化,进而反映混凝土养护状况.试验结果表明:混凝土的电阻率受养护条件的影响十分显著,通过距离表面不同深度处的电阻率差异能够很好反映混凝土的养护程度,不同养护制度主要影响距离表面1～3 cm处混凝土的电阻率.基于混凝土的电阻率,可以将养护质量划分为三个等级,即养护充分、养护一般和养护不良.对于粉煤灰高性能混凝土来说,28 d距离混凝土的表面2 cm处电阻率＜15 kΩ·cm为养护充分,15 kΩ·cm～100 kΩ·cm为养护一般,而＞100 kΩ·cm则养护不良.电阻率法可以有效应用于现场混凝土工程检测.
Abstract:
A new resistivity method for judging the degree of concrete curing is proposed: using built-in copper electrode and improved resistivity measurement method, three typical conservation systems are selected: natural curing, standard curing and water curing, and the change of resistivity at different depths reflects the humidity gradient change inside concrete, and then reflects the curing status of concrete. The test results show that the resistivity of concrete is significantly affected by the curing conditions, and the curing degree of concrete can be well reflected by the difference in resistivity at different depths from the surface, and different curing systems mainly affect the resistivity of concrete at 3~1 cm from the surface. Based on the resistivity of concrete, the curing quality can be divided into three grades, namely adequate curing, general curing and poor curing. For fly ash high-performance concrete, the resistivity at 3 cm away from the surface of concrete at 28 days < 2 kΩ·cm is fully cured, 15 kΩ·cm~15 kΩ·cm is generally cured, and the > 100 kΩ·cm is poorly maintained. The resistivity method can be effectively applied to on-site concrete engineering testing.

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更新日期/Last Update: 1900-01-01