长江科学院院报 ›› 2014, Vol. 31 ›› Issue (4): 89-92.DOI: 10.3969/j.issn.1001-5485.2014.04.0192014, 31(04):89-92

• 仪器设备与测试技术 • 上一篇    下一篇

C30普通及钢渣混凝土中无应力计的伴测温度-电阻比特性试验研究

徐 兵1, 徐 兵2, 曹国福2   

  1. 1.上海宝钢新型建材科技有限公司 技术中心, 上海 201999;
    2.上海勘测设计研究院 工程检测中心, 上海 200434
  • 收稿日期:2013-03-15 修回日期:2014-04-04 出版日期:2014-04-01 发布日期:2014-04-04
  • 通讯作者: 徐 兵(1978-), 男, 湖北黄冈人, 高级工程师, 主要从事工程监测工作, (电话) 13918137440(电子信箱)xubing_wuhee@126.com。
  • 作者简介:徐 兵(1978-), 男, 上海人, 工程师, 硕士, 主要从事钢铁工业固废资源综合利用研究, (电话) 021-66930615(电子信箱)baosteelxb@sina.com。

Experimental Study on the Relationship Between Temperatureand Electrical Resistance for C30 Ordinary Concrete andC30 Steel Slag Concrete by Using Non-stress Meters

XU Bing1, XU Bing2, CAO Guo-fu2   

  1. 1.Shanghai Baosteel New Building Materials Technology Co., Ltd., Shanghai 201999, China;2.Engineering Testing Center, Shanghai Investigation, Design & Research Institute, Shanghai 200434, China
  • Received:2013-03-15 Revised:2014-04-04 Published:2014-04-01 Online:2014-04-04

摘要: 较详细地介绍了C30普通混凝土和C30钢渣混凝土中无应力计的伴测温度-电阻比关系试验过程中发现普通混凝土中各无应力计在各测试时刻的温度、电阻比呈现出明显的反比关系;钢渣混凝土中各无应力计在各测试时刻的温度、电阻比呈现出明显的正比关系。通过无应力计的计算公式, 结合混凝土在非荷载作用下的变形理论以及实测数据用最小二乘法拟合, 可推导出上述关系产生的原因, 伴测温度和电阻比呈线性关系——当混凝土骨料的热膨胀系数小于无应力计的温度修正系数(温度补偿系数)时, 无应力计的伴测温度-电阻比呈反比关系;当混凝土骨料的热膨胀系数大于无应力计的温度修正系数(温度补偿系数)时, 无应力计的伴测温度-电阻比呈正比关系。

关键词: 无应力计, 防汛墙, C30普通混凝土, C30钢渣混凝土, 伴测温度, 电阻比, 热膨胀系数, 最小二乘法

Abstract: The relationship between temperature and electrical resistance for C30 ordinary concrete (Portland cement concrete) and C30 steel slag concrete is investigated in detail. On the basis of monitoring data obtained from non-stress meters, it was found that in both ordinary concrete and steel slag concrete, the temperate is linearly related to the electrical resistance. To be specific, in ordinary concrete the temperate is inversely proportional to electrical resistance while in steel slag concrete the temperate is proportional to electrical resistance. The above findings can be explained by the principles of non-stress meter and non-stress deformation of concrete in association with least-squares-fitted curve of monitoring data as follows: the temperature is inversely proportional to electrical resistance when the thermal expansion coefficient of concrete aggregate is smaller than the temperature correction (compensation) factor of non-stress meter, and vice versa.

Key words: non-stress meter, flood control wall, C30 ordinary concrete, C30 steel slag concrete, measurement temperature, electrical resistance, coefficient of thermal expansion, least squares fitting

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