多沙河流闸门过流面抗冲磨防护环氧砂浆的研制及性能研究  

Development and performance of abrasion-resistant epoxy mortar for high-head gate in sandy rivers

作　　者：陈卫 任凯麟 张御翎 江凌 杨贵海 王正中[2] 亢阳 CHEN Wei;REN Kailin;ZHANG Yuling;JIANG Ling;YANG Guihai;WANG Zhengzhong;KANG Yang(China Railway Water Resources and Hydropower Planning and Design Group Co.,Ltd.,Nanchang 330029,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China)

机构地区：[1]中铁水利水电规划设计集团有限公司,江西南昌330029 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《水资源与水工程学报》2023年第3期129-135,共7页Journal of Water Resources and Water Engineering

基　　金：江西省水利厅科技课题(202023ZDKT04);中国中铁股份有限公司科技研究开发计划项目(2021-重大-08)。

摘　　要：研制一种适用于多沙河流闸门过流面抗冲耐磨防护的环氧砂浆,通过环氧树脂体系的工作性能初选配方,选用正交试验研究不同因素对环氧砂浆抗压强度和抗折强度影响的显著性,分析胶砂比和水泥掺量对砂浆力学性能的影响,通过核磁共振技术研究不同配比环氧砂浆内部孔径大小和分布情况,并通过高速水下钢球冲磨机测试不同配比环氧砂浆抵抗推移质冲磨的性能。结果表明:胶砂比对环氧砂浆的抗压强度和抗折强度影响显著,随着胶砂比的增加,环氧砂浆的抗压强度和抗折强度先快速增加后有一定程度的回落,当石英砂∶水泥∶环氧树脂为5∶1∶3时,环氧砂浆流动性好,养护7 d后内部孔隙分布均匀,抗压强度为119.0 MPa,抗折强度为42.24 MPa,216 h高速水下钢球法冲磨厚度损失为0.063 mm。结合数据分析,高强高韧环氧砂浆粘结强度高、施工难度小、抗冲磨效果较好,适用于闸门过流面防护。A kind of epoxy mortar suitable for erosion-resistant and abrasion-resistant protection of high-head gate flow surface in sandy rivers was developed for the safe operation of hydraulic structures.According to the the working performance of the epoxy resin system,the primary formula was formed,then the orthogonal test was used to study the significance of the influence of different factors on the compressive strength and flexural strength of the epoxy mortar,so as to analyze the influence of cement-sand ratio and cement content on the mechanical properties of the mortar.Meanwhile,the internal pore size and distribution of epoxy mortar with different proportions were studied by nuclear magnetic resonance imaging technology,and the performance of different proportions of epoxy mortar against bed load abrasion was tested by a high-speed underwater steel ball grinder.The results show that the cement-sand ratio has a significant effect on the compressive strength and flexural strength of epoxy mortar.With the increase of the cement-sand ratio,the compressive strength and flexural strength of epoxy mortar first increase rapidly and then decrease to a certain extent.When the quartz sand∶cement∶epoxy resin is 5∶1∶3,the epoxy mortar is easy to mix and has good fluidity.After 7 days of curing,the internal pores of the mortar are evenly distributed,its compressive strength is 119.0 MPa,flexural strength is 42.24 MPa,and the thickness loss of 216 h high-speed underwater steel ball method is 0.063 mm.Combined with data analysis,high strength and high toughness epoxy mortar has high bonding strength,low construction difficulty and good abrasion resistance,which is suitable for gate flow surface protection.

关 键 词：高水头闸门过流面 抗冲磨 环氧砂浆 胶砂比 正交试验 多沙河流 

分 类 号：TV432.8[水利工程—水工结构工程]