|Table of Contents|

Influence of anti-abrasion performance of ultra-high performance concrete under coupling effect of chloride salt corrosion and multiple abrasion(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2025年01期
Page:
50-59
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Influence of anti-abrasion performance of ultra-high performance concrete under coupling effect of chloride salt corrosion and multiple abrasion
Author(s):
FAN Wei1; 2; 3;  SUN Chun-jie1; 2; 3;  MA Ling-fei1; 2; 3;  ZHU Zhang-hao1
(1. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, Hunan, China; 3. State Key Laboratory of Bridge Engineering Safety and Resilience,Hunan University, Changsha 410082, Hunan, China)
Keywords:
bridge engineering;  ultra-high performance concrete;  experimental reasearch;  multiple abrasion;  anti-abrasion performance;  chloride salt corrosion
PACS:
U441
DOI:
10.19721/j.cnki.1671-8879.2025.01.005
Abstract:
To explore the characteristics of multiple abrasion and accompanying corrosion issues in existingbridge piers in mountainous areas, the performance tests were conducted on ultra-high performance concrete(UHPC)and ordinary concrete under the combined effects of chloride salt corrosion and multiple abrasion.Firstly, UHPC and normal concrete were corroded by chlorine salt solution, and the mechanical properties ofUHPC and normal concrete under chlorine salt corrosion were investigated. Then, the anti-abrasionperformances of UHPC and normal concrete were investigated by underwater steel ball method, the anti-abrasion performances of UHPC under single abrasion and multiple corrosion-abrasion cycles were compared, and the variation patterns of UHPC's anti-abrasion performances under different abrasion frequencies wererevealed. Finally, the function related to the massretention of UHPC, abrasion time, and abrasion frequency under the different abrasion frequencies wasestablished, and the experimental data were verified. The results show that for single abrasion, the anti-abrasion strength of UHPC after chloride saltcorrosion for 28 days is 5.97 times greater than that of ordinary concrete without chloride salt corrosion, theanti-abrasion strength of UHPC after four cycles of corrosion-abrasion remains 2.94 times higher than that ofordinary concrete without chloride salt corrosion, demonstrating that UHPC has excellent anti-abrasionperformance compared to ordinary concrete. Under the same chloride salt corrosion conditions, it is found thatmultiple corrosion-abrasion cycles lead to a 506.62% increase in the mass loss of UHPC compared to singleabrasion, indicating that performance assessments based on single abrasion tests may overestimate the anti-abrasion performances of the material, and make the designs unsafe. The multiple corrosion-abrasion test and analysismethods proposed in this paper are expected to promote more reasonable evaluations of the anti-abrasionperformances of structural components such as bridge piers, overcoming the shortcomings of traditional singleabrasion tests that may lead to overestimation of material anti-abrasion performances.5 tabs, 10 figs, 30 refs.

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Last Update: 2025-02-25