基于Wiener随机过程再生混凝土盐冻寿命预测

doi:10.6040/j.issn.1672-3961.0.2024.277

山东大学学报 (工学版) ›› 2026, Vol. 56 ›› Issue (1): 80-88.doi: 10.6040/j.issn.1672-3961.0.2024.277

• 土木工程 • 上一篇

基于Wiener随机过程再生混凝土盐冻寿命预测

曹芙波¹,张嘉仪¹,张利凯²,李敦³,黄强⁴,赵波⁴,彭理渊⁵,田金亮¹,王晨霞^1*

1.内蒙古科技大学土木工程学院, 内蒙古包头 014010;2.山东锦华建设集团有限公司, 山东日照 276800;3.中建一局集团第五建筑有限公司, 北京 100020;4.内蒙古煤矿设计研究院有限责任公司, 内蒙古呼和浩特 010010;5.内蒙古电力(集团)有限责任公司薛家湾供电分公司, 内蒙古鄂尔多斯 010300

发布日期:2026-02-03
作者简介:曹芙波(1976— ),男,湖南衡阳人,教授,硕士生导师,博士,主要研究方向为固废资源化及组合结构. E-mail:caofubo@139.com. *通信作者简介:王晨霞(1977— ),女,内蒙古集宁人,教授,硕士生导师,博士,主要研究方向为再生混凝土及其耐久性. E-mail:wangchenxia77@139.com
基金资助:
国家自然科学基金资助项目(52368024,51868061);内蒙古自然科学基金资助项目(2024MS05028,2022LHMS05011)

Life prediction of recycled aggregate concrete in salt freezing based on Wiener random process

CAO Fubo¹, ZHANG Jiayi¹, ZHANG Likai², LI Dun³, HUANG Qiang⁴, ZHAO Bo⁴, PENG Liyuan⁵, TIAN Jinliang¹, WANG Chenxia^1*

CAO Fubo¹, ZHANG Jiayi¹, ZHANG Likai², LI Dun³, HUANG Qiang⁴, ZHAO Bo⁴, PENG Liyuan⁵, TIAN Jinliang¹, WANG Chenxia^1*(1. School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
2. Shandong Jinhua Construction Group Co., Ltd., Rizhao 276800, Shandong, China;
3. China Construction First Group Fifth Engineering Construction Co., Ltd., Beijing 100020, China;
4. Inner Mongolia Coal Mine Design &
Research Institute Limited Liability Company, Hohhot 010010, Inner Mongolia, China;
5. Xuejiawan Power Supply Branch Company, Inner Mongolia Power(Group)Co., Ltd., Erdos 010300, Inner Mongolia, China

Published:2026-02-03

摘要/Abstract

摘要： 为研究盐冻环境对再生混凝土(recycled aggregate concrete, RAC)力学性能的影响,以强度等级、冻融循环次数和侵蚀盐种类为试验变量,结合宏观试验和微观试验,分析盐冻循环后RAC和普通混凝土(normal aggregate concrete, NAC)的宏观性能劣化机理。基于盐冻循环试验下RAC的相对动弹性模量,采用Wiener随机过程进行建模并分析可靠度的变化规律,预测RAC在盐冻环境下的使用寿命。结果表明:RAC的抗盐冻性劣于NAC,并且RAC的强度等级越高抗盐冻性能越好;3.7%质量分数的Na₂SO₄溶液组在盐冻循环60次前抗盐冻性较好,相对动弹性模量损失率仅为1.72%,90次盐冻循环后RAC因损伤累积导致抗盐冻性迅速下降,相对动弹性模量损失率达17.16%;微观分析发现,盐冻循环后, RAC强度等级越低,盐冻后内部结构越松散,裂缝宽度越大。依据Wiener随机过程所建模型分析可知,RC50-C模型可靠度持续时间最长,在华北地区抗冻耐久性寿命预估可达53 a。

关键词: 再生混凝土, 盐冻循环, 耐久性, Wiener随机过程, 寿命预测

Abstract: In order to study the effect of salt freezing environment on the mechanical properties of recycled aggregate concrete(RAC), the strength grade, the number of freeze-thaw cycles and the eroded salt type were used as test variables, and the macroscopic and microscopic tests were combined. The deterioration mechanism of RAC and normal aggregate concrete(NAC)after salt freezing cycle was analyzed. Based on the relative dynamic elastic modulus of RAC under salt freezing cycle test, the Wiener random process was used to model and analyze the change rule of reliability, and the service life of RAC in salt freezing environment was predicted. The results showed that the salt freezing resistance of RAC was worse than that of NAC, and the higher the strength grade of RAC, the better the salt freezing resistance. The loss rate of dynamic elastic modulus of 3.7% mass fraction Na₂SO₄ group was only 1.72% before 60 salt freezing cycles, and the loss rate of dynamic elastic modulus of RAC decreased rapidly after 90 salt freezing cycles due to the damage accumulation of salt freezing resistance, reaching 17.16 %. Microscopic analysis found that after the salt freezing cycle, the lower the RAC strength rating, the looser the internal structure was after salt freezing, and the larger the crack width. According to the model analysis of Wiener random process, the reliability duration of RC50-C model was the longest, and the estimated value of frost resistance durability life in North China could reach 53 years.

Key words: recycled aggregate concrete, salt freezing cycle, durability, Wiener random process, life prediction

中图分类号:

TU375

曹芙波,张嘉仪,张利凯,李敦,黄强,赵波,彭理渊,田金亮,王晨霞. 基于Wiener随机过程再生混凝土盐冻寿命预测[J]. 山东大学学报 (工学版), 2026, 56(1): 80-88.

CAO Fubo, ZHANG Jiayi, ZHANG Likai, LI Dun, HUANG Qiang, ZHAO Bo, PENG Liyuan, TIAN Jinliang, WANG Chenxia. Life prediction of recycled aggregate concrete in salt freezing based on Wiener random process[J]. Journal of Shandong University(Engineering Science), 2026, 56(1): 80-88.

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基于Wiener随机过程再生混凝土盐冻寿命预测

Life prediction of recycled aggregate concrete in salt freezing based on Wiener random process

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