中国塑料 ›› 2022, Vol. 36 ›› Issue (10): 65-70.DOI: 10.19491/j.issn.1001-9278.2022.10.010

• 材料与性能 • 上一篇    下一篇

固化温度对缓凝黏合剂固化时间和强度的影响

黄健伟()   

  1. 中铁十六局集团电气化工程有限公司,北京 100018
  • 收稿日期:2022-07-17 出版日期:2022-10-26 发布日期:2022-10-27
  • 作者简介:黄健伟(1982-),男,高级工程师,主要研究方向为土建施工及材料研发,278742231@qq.com

Effect of curing temperature on curing time and strength of adhesive

HUANG Jianwei()   

  1. China Railway No. 16 Bureau Group Electric Engineering Co,Ltd,Beijing 100018,China
  • Received:2022-07-17 Online:2022-10-26 Published:2022-10-27

摘要:

为研究固化温度对缓凝黏合剂固化时间和强度的影响,将缓凝黏合剂在固化温度分别为25、45、65、85 ℃的条件下养护。通过邵氏硬度试验研究了3种缓凝黏合剂在不同固化温度条件下的固化速率,测试了缓凝黏合剂在不同固化温度条件下的拉伸剪切强度、抗折强度和抗压强度。结果表明,固化温度越高,缓凝黏合剂固化时间越短,以25 ℃为基准,45 ℃条件下的固化时间缩短约50 %,45 ℃以上,温度每升高20 ℃,固化时间缩短约10 %;以25 ℃条件下的强度为基准,缓凝黏合剂在不同固化温度条件下拉伸剪切强度的变化率在6 %内,抗折强度的增加率在6 %~45 %,抗压强度的增加率在9 %~50 %。

关键词: 缓黏结预应力, 缓凝黏合剂, 固化温度, 邵氏硬度, 拉伸剪切强度, 抗压强度

Abstract:

In order to explore the influence of curing temperature on the curing time and strength of an adhesive,the adhesive was cured at curing temperatures of 25, 45, 65, and 85 ℃. The curing rates of three types of adhesives at different curing temperatures were investigated through the Shore hardness test, and their tensile shear strength, flexural strength, and compressive strength of at different curing temperatures were measured. The results indicated that the higher the curing temperature, the shorter is the curing time. Taking 25 ℃ as a benchmark, the curing time at 45 ℃ was shortened by about 50 %. At a curing temperature at above 45 ℃,the curing time was shortened by about 10 % with an increase in temperature by every 20 ℃. In view of the strength at 25 ℃, the adhesives showed a change rate of tensile shear strength within 6 % under different curing temperatures. Their increase rates in flexural strength and compressive strength were distributed in the ranges of 6 %~45 % and 9 %~50 %, respectively.

Key words: retarded?bonding prestress, retarding adhesive, curing temperature, tensile shear strength, flexural strength, compressive strength

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