结构加固用胶粘剂T型剥离测试技术与标准探析

Analysis of T-peel testing technology and standards for adhesive used in structural reinforcement

本文比较和分析了结构加固用胶粘剂(包括粘钢胶、浸渍胶、植筋胶和裂缝胶等)相关标准规定的T型剥离检测规定和技术要求,探讨了T型剥离测试的技术工艺对测定结果的影响。通过对比国内外发布的相关标准,针对钢-钢T冲击剥离长度检测中胶层厚度对其剥离性能的影响进行了探索,并开展了相关试验,取得了初步进展。最后,结合国内外相关标准中规定的检测技术和方法对其进行了评价。研究结果表明:(1)本文中所引用的不同T型剥离测试的标准存在较大差异,且均未针对不同行业和不同领域应用的结构胶粘剂进行特殊限定。由于材料本身的性能评价与测试技术存在较大差异,因此为规范T型剥离测试方法在胶粘剂行业中的应用,在标准的制修订上仍有大量工作需要开展。(2)国内外现行与加固用胶粘剂T型剥离相关的标准均未对试件的胶层厚度范围做出明确规定,仅在进行T冲击剥离长度的测试时记录胶层厚度,而记录的胶层厚度值的高低并不影响对结果的判断。T冲击剥离能力是衡量结构胶韧性的重要指标,胶层的厚度范围会明显影响T冲击剥离能力。标准在该方面的不明晰不利于T冲击剥离长度或抗冲击剥离能力的判定,也不能客观反映胶粘剂韧性的真实检验。(3)国内现行加固用胶粘剂T型剥离测试的标准在检测方法上的不细致、不统一以及个别方面的不合理,给生产厂家、设计单位及检测机构都带来了较大的困惑。因此,应加强对T型剥离测试的相关研究,出台更为完善的标准,提升其科学性和适用性,以促进加固用胶粘剂性能评价的检测技术进步及行业的健康发展。

The T-peel testing regulations and technical requirements stipulated in the relevant standards for adhesive used in structural reinforcement(including steel bonding adhesive,impregnating adhesive,anchoring adhesive,crack adhesive,etc.)were compared and analyzed in this article.The impact of the technical process of the T-peel testing on the measurement results was also discussed.By comparing relevant standards issued both domestically and internationally,the impact of adhesive layer thickness on the peeling performance in steel-steel Timpact peeling length testing was explored.Relevant experiments were conducted,and initial progress was achieved.Finally,the evaluation was conducted based on the testing techniques and methods specified in relevant domestic and international standards.The research results showed that,(1)There are significant differences in the standards for different T-peel tests cited in this article,and none of them have specific limitations for structural adhesive used in different industries and fields.Due to significant differences in the performance evaluation and testing techniques of materials themselves,there is still a lot of work to be done in the formulation and revision of standards to standardize the application of T-peel testing methods in the adhesive industry(.2)The current standards related to adhesive T-peel reinforcement,both domestically and internationally,do not explicitly specify the range of adhesive layer thickness for test specimens.The adhesive layer thickness is only recorded during the test of T-peel length,and the recorded value of adhesive layer thickness does not affect the judgment of the results.The T-impact peeling ability is an important indicator for measuring the toughness of structural adhesive,and the thickness range of the adhesive layer will significantly affect the T-impact peeling ability.The lack of clarity in the standard in this regard is not conducive to the determination of T-impact peeling length or impact resistance,and nor can it objectively reflect the true test of adhesive toughness(.3)The current domestic standards for T-peel testing of reinforcement adhesive are not detailed,uniform,and sometimes unreasonable in terms of testing methods,which have caused significant confusion for manufacturers,design units,and testing institutions.Therefore,it is necessary to strengthen the research on T-peel testing,introducing more comprehensive standards,enhancing its scientificity and applicability,and promoting technological advancements in the evaluation of reinforcement adhesive performance and the healthy development of the industry.