The effects of modified interface agents on the bonding characteristics between customized cement adhesive for insulators and aluminum flanges

IF 3.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications Pub Date : 2024-09-04 DOI:10.1016/j.mtcomm.2024.110310

Zihan Zheng, Yongqi Da, Tingshu He, Longgang Yu

{"title":"The effects of modified interface agents on the bonding characteristics between customized cement adhesive for insulators and aluminum flanges","authors":"Zihan Zheng, Yongqi Da, Tingshu He, Longgang Yu","doi":"10.1016/j.mtcomm.2024.110310","DOIUrl":null,"url":null,"abstract":"Insulators are a composite structure composed of ceramic and aluminum flanges bonded together with cement adhesive, the strong bonding between cement adhesive and aluminum flanges is significant to ensure the normal operation of the ultra-high voltage transmission. However, the high alkalinity, low strength, high drying shrinkage, and weak interfacial adhesion between cement adhesive and aluminum flanges posed a big challenge to sound development of insulators, the related solution and research remained unknown. Therefore, the customized cement adhesive was prepared by Portland cement (OPC), sulphoaluminate cement (SAC) and mineral admixtures, and the effects of modified interface agents on the bonding characteristics between customized cement adhesive and aluminum flanges were investigated by FTIR, SEM and MIP. The findings revealed that an optimal customized cement adhesive could be obtained by adjusting a suitable ratio of OPC, SAC and mineral admixtures, 11d’s compressive strength of customized cement adhesive reached 89.3 MPa, the dry shrinkage rate at 28d decreased by 65.0 % than OPC, the pH reduce apparently at 11.52. The 11d interfacial bond strength using 45 % VAE and AA latex was 0.187 MPa and 0.276 MPa, which much higher than the blank sample as 0.055 MPa. The contact angles of 45 % VAE and AA latex decreases by 24.7 % and 35.0 % than asphalt. The modified interface agents could fill the large pores of cement adhesive, form a smooth and strong film in the binding structure. The polymer in the interface agent may chelate with Ca, Alor Fe further enhancing the cohesion.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"66 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Communications","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.mtcomm.2024.110310","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Insulators are a composite structure composed of ceramic and aluminum flanges bonded together with cement adhesive, the strong bonding between cement adhesive and aluminum flanges is significant to ensure the normal operation of the ultra-high voltage transmission. However, the high alkalinity, low strength, high drying shrinkage, and weak interfacial adhesion between cement adhesive and aluminum flanges posed a big challenge to sound development of insulators, the related solution and research remained unknown. Therefore, the customized cement adhesive was prepared by Portland cement (OPC), sulphoaluminate cement (SAC) and mineral admixtures, and the effects of modified interface agents on the bonding characteristics between customized cement adhesive and aluminum flanges were investigated by FTIR, SEM and MIP. The findings revealed that an optimal customized cement adhesive could be obtained by adjusting a suitable ratio of OPC, SAC and mineral admixtures, 11d’s compressive strength of customized cement adhesive reached 89.3 MPa, the dry shrinkage rate at 28d decreased by 65.0 % than OPC, the pH reduce apparently at 11.52. The 11d interfacial bond strength using 45 % VAE and AA latex was 0.187 MPa and 0.276 MPa, which much higher than the blank sample as 0.055 MPa. The contact angles of 45 % VAE and AA latex decreases by 24.7 % and 35.0 % than asphalt. The modified interface agents could fill the large pores of cement adhesive, form a smooth and strong film in the binding structure. The polymer in the interface agent may chelate with Ca, Alor Fe further enhancing the cohesion.

查看原文本刊更多论文

改性界面剂对用于绝缘子和铝法兰的定制水泥粘合剂粘合特性的影响

绝缘子是由陶瓷和铝法兰用水泥胶粘剂粘结在一起的复合结构，水泥胶粘剂与铝法兰之间的牢固粘结对于保证特高压输电的正常运行意义重大。然而，水泥粘合剂与铝法兰之间的高碱性、低强度、高干燥收缩率和弱界面粘合力对绝缘子的健全发展构成了巨大挑战，相关的解决方案和研究仍是未知数。因此，采用硅酸盐水泥（OPC）、硫铝酸盐水泥（SAC）和矿物掺合料制备了定制水泥粘合剂，并通过傅立叶变换红外光谱、扫描电镜和 MIP 研究了改性界面剂对定制水泥粘合剂与铝法兰粘合特性的影响。结果表明，通过调整 OPC、SAC 和矿物掺合料的合适比例，可获得最佳的定制水泥胶粘剂，定制水泥胶粘剂的 11d 抗压强度达到 89.3 MPa，28d 的干缩率比 OPC 降低了 65.0%，pH 值在 11.52 时明显降低。使用 45 % VAE 和 AA 胶乳的 11d 界面粘接强度分别为 0.187 MPa 和 0.276 MPa，远高于空白样品的 0.055 MPa。与沥青相比，45% VAE 和 AA 胶乳的接触角分别降低了 24.7% 和 35.0%。改性界面剂可以填充水泥胶粘剂的大孔隙，在粘结结构中形成光滑而坚固的薄膜。界面剂中的聚合物可与钙、铝或铁螯合，进一步增强内聚力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Today Communications Materials Science-General Materials Science

CiteScore

5.20

自引率

5.30%

发文量

1783

审稿时长

51 days

期刊介绍： Materials Today Communications is a primary research journal covering all areas of materials science. The journal offers the materials community an innovative, efficient and flexible route for the publication of original research which has not found the right home on first submission.