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胡晓娟^1,2

 

(1. 福建漳发建设有限公司 , 漳州    363000; 2. 福州大学 , 福州    350100)

摘  要: 为了保障管道密封可靠性 、延长管道使用寿命 , 以某市政给排水管道改造工程为背景 , 选取三元乙丙橡胶  (EPDM) 、丁腈橡胶  (NBR) 、硅橡胶  (SR) 及氢化丁腈橡胶  (HNBR) 四种常用密封橡胶材料 , 基于规范要求设计多因素耦合试验方案 , 系统研究了压缩率 、温度 、介质 、老化时间对材料压缩回弹性能及耐久性能的影响规律 。研究结果表明 : 压缩率在 20% ~ 30% 区间时 , SR 回弹率最高  (达 92. 35% ~ 98. 12%) , EPDM的综合性能最优 ; 温度升至 70℃ 时 , HNBR 与 NBR 压缩永久变形率超过 15% , 回弹率低于 85% ; 污水介质中 SR变形率仅增 0. 68% , EPDM 增加 1. 14% ; 热空气 、介质及臭氧耦合老化下 , SR 拉伸强度保留率达 90. 36% , EP- DM 为 86. 75% , NBR 仅 75. 48% , 综合性能排序为 SR > EPDM > HNBR > NBR。研究明确了 20% ~ 30%压缩率、 70℃ 为性能拐点 , 建立了多因素耦合下性能衰减规律 , 为工程选材与寿命设计提供依据。

关键词: 建筑给排水 ; 密封橡胶 ; 压缩回弹 ; 耐久性 ; 多因素耦合 ; 压缩永久变形

中图分类号: TU532. 6      文献标志码: A      文章编号: 1005-8249 (2026) 04-0155-07

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 04. 023

 

Compression Resilience and Durability of Rubber Sealing Materials for Building

Water Supply and Drainage under Multi-Factor Coupling

HU Xiaojuan^1,2

(1. Fujian Zhangfa Construction Co. , Ltd. , Zhangzhou 363000, China;

2. Fuzhou University, Fuzhou 350100, China)

Abstract : In order to ensure the reliability of pipeline sealing and extend the service life of pipelines, taking a municipal water supply and drainage pipeline renovation project as the background, four commonly used sealing rubber materials were selected: ethylene propylene diene monomer (EPDM) , nitrile rubber (NBR) , silicone rubber (SR) , and hydrogenated nitrile rubber (HNBR). Based on standard requirements, a multi-factor coupled test scheme was designed to systematically study the effects of compression rate, temperature, medium, and aging time on the material's compression rebound performance and durability. The research results show that when the compression rate is in the range of 20% - 30% , SR has the highest rebound rate (92. 35% ~98. 12%) , while EPDM has the best overall performance; when the temperature rises to 70℃ , the compression permanent deformation rates of HNBR and NBR exceed 15% , and their rebound rates are below 85% ; in a sewage medium, the deformation rate of SR increases by only 0. 68% , and EPDM by 1. 14% ; under coupled aging of hot air, medium, and ozone, SR retains 90. 36% of its tensile strength, EPDM 86. 75% , and NBR only 75. 48% , with overall performance ranking SR>EPDM>HNBR>NBR. The study identified a compression rate of 20% ~ 30% and 70℃ as performance turning points, and established the rules of performance degradation under multi-factor coupling, providing a basis for engineering material selection and lifespan design.

Key words: building water supply and drainage; sealing rubber; compression rebound; durability; multi -factor coupling; permanent compression deformation