[1]李蕾蕾,康 抗,冯泽平,等.冻融与硫酸盐作用下再生混凝土性能劣化研究[J].西安建筑科技大学学报(自然科学版),2023,55(04):571-577.[doi:10.15986/j.1006-7930.2023.04.012 ]
　LI Leilei,KANG Kang,FENG Zeping,et al.Study on performance deterioration of recycled concrete under coupling effect of freeze-thaw and sulfate[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(04):571-577.[doi:10.15986/j.1006-7930.2023.04.012 ]
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冻融与硫酸盐作用下再生混凝土性能劣化研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年04期
页码:
571-577
栏目:
出版日期:
2023-10-26

文章信息/Info

Title:
Study on performance deterioration of recycled concrete under coupling effect of freeze-thaw and sulfate
文章编号:
1006-7930(2023)04-0571-07
作者:
李蕾蕾1; 康 抗1; 冯泽平1; 肖青波1; 肖前慧2
(1.中国电建集团西北勘测设计研究院有限公司 陕西 西安 710065; 2.西安科技大学 建筑与土木工程学院 陕西 西安 710054)
Author(s):
LI Leilei1;  KANG Kang1;  FENG Zeping1;  XIAO Qingbo1;  XIAO Qianhui2
(1.Power China Northwest Engineering Corporation Limited, Xi'an 710065, China; 2.School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China)
关键词:
再生混凝土;  冻融循环;  硫酸盐腐蚀;  力学性能;  寿命预测
Keywords:
recycled concrete;  freeze-thaw cycle;  sulfate corrosion;  mechanical properties;  life prediction
分类号:
TU528.1
DOI:
10.15986/j.1006-7930.2023.04.012
文献标志码:
A
摘要:
主要研究在冻融循环和硫酸盐腐蚀共同作用下再生混凝土的力学性能以及性能劣化规律.试验采用0.35、0.45、0.55三组水灰比,再生骨料质量取代率30%,Na2SO4溶液浓度为5%,混凝土试块在不同冻融循环次数下,其质量、相对动弹性模量、抗压强度进行测试,并结合电镜扫描和XRD衍射实验.试验结果表明:水灰比越大,再生混凝土在冻融与硫酸盐环境下的力学性能越差,耐久性能劣化也越严重,并结合电镜扫描的图片和衍射图分析了再生混凝土的损伤.同时,以相对动弹性模量作为损伤值对再生混凝土在冻融和硫酸盐共同作用下的寿命进行了预测; 结果表明:水灰比是影响其寿命的重要因素,在冻融与硫酸盐共同作用的环境下,建议再生混凝土的水灰比宜控制在0.45及以下.
Abstract:
This paper mainly studies the mechanical properties and performance degradation of recycled concrete under the combined action of freeze-thaw cycle and sulfate corrosion. Three groups of water-cement ratios of 0.35,0.45 and 0.55 were used in the test. The replacement rate of recycled aggregate was 30%, and the concentration of Na2SO4 solution was 5%. The mass, relative dynamic elastic modulus and compressive strength of concrete specimens were tested under different freeze-thaw cycles, combined with electron microscopy and XRD diffraction experiments. The test results show that the greater the water-cement ratio, the worse the mechanical properties of recycled concrete under freeze-thaw and sulfate environment, and the more serious the deterioration of durability. The damage of recycled concrete is analyzed by combining the images and diffraction patterns of electron microscope scanning. At the same time, the relative dynamic elastic modulus is used as the damage value to predict the life of recycled concrete under the combined action of freeze-thaw and sulfate. The results show that the water-cement ratio is an important factor affecting its service life. Under the combined action of freeze-thaw and sulfate, it is suggested that the water-cement ratio of recycled concrete should be controlled at 0.45 and below.

参考文献/References:

[1]XIAO Q H, LI Q, CAO Z Y, et al. The deterioration law of recycled concrete under the combined effects of freeze-thaw and sulfate attack[J]. Construction and Building Materials, 2019, 200: 344-355.
[2]邓祥辉,高晓悦,王睿,等.再生混凝土抗冻性能试验研究及孔隙分布变化分析[J].材料导报, 2021, 35(16): 16028-16034.
DENG Xianghui, GAO Xiaoyue, WANG Rui, et al. Experimental study on frost resistance of recycled concrete and analysis of pore distribution change[J].Material introduction, 2021,35(16): 16028-16034.
[3]王晨霞,刘路,曹芙波,等.冻融循环后再生混凝土力学性能试验研究[J].建筑结构学报,2020,41(12):193-202.
WANG Chenxia, LIU Lu, CAO Fubo, et al. Experimental study on mechanical properties of recycled concrete after freeze-thaw cycles[J]. Journal of Building Structures, 2020,41(12): 193-202.
[4]UG URLU A I, KARAKOÇ M B, ÖZCAN A. Effect of binder content and recycled concrete aggregate on freeze-thaw and sulfate resistance of GGBFS based geopolymer concretes[J]. Construction and Building Materials, 2021, 301: 124246.
[5]阎西康,周明,杜闯,等.骨料和外加剂对活性粉末混凝土强度影响的试验研究[J].混凝土, 2021, 386(12):56-60,65.
YAN Xikang, ZHOU Ming, DU Chuang, et al. Experimental study on the effect of aggregates and admixtures on the strength of reactive powder concrete[J]. Concrete, 2021, 386(12): 56-60, 65.
[6]谢本怡. 再生骨料混凝土抗硫酸盐侵蚀性能研究[D]. 武汉:华中科技大学, 2014.
XIE Benyi. Research on sulfate resistance of recycled aggregate concrete[D].Wuhan: Huazhong University of Science and Technology, 2014.
[7]薛建阳, 罗峥, 元成方,等. 再生混凝土力学性能及耐久性能试验研究[J]. 工业建筑, 2013, 43(10):6.
XUE Jianyang, LUO Zheng, YUAN Chengfang, et al. Experimental study on mechanical properties and durability of recycled concrete[J]. Industrial Buildings, 2013,43(10): 6.
[8]闫宏生.再生混凝土的硫酸盐腐蚀试验研究[J].混凝土,2013(5):13-15,20.
YAN Hongsheng. Experimental study on sulfate corrosion of recycled concrete[J].Concrete, 2013(5): 13-15,20.
[9]田伟宇. 冻融与硫酸盐耦合作用下不同水灰比再生混凝土地性能劣化研究[D].西安:西安科技大学,2020
TIAN Weiyu. Study on the deterioration of ground performance of recycled concrete with different water-cement ratio under the coupling effect of freeze-thaw and sulfate[D].Xi'an: Xi'an University of Science and Technology, 2020
[10]中华人民共和国住房和城乡建设部.普通混凝土拌合物性能试验方法标准:GB/T 50080—2016[S].北京:中国建筑工业出版社,2016.
Ministry of Housing and Urban-Rural Development of the People's Republic of China.Standard for test method of performance on ordinary fresh concrete:GB/T 50080—2016[S]. Beijing: China Construction Industry Press, 2016.
[11]中华人民共和国住房和城乡建设部.普通混凝土长期性能和耐久性能试验方法标准:GB/T 50082—2009[S].北京:中国建筑工业出版社,2009.
Ministry of Housing and Urban-Rural Development of the People's Republic of China. Standard for test methods of long-term performance and durability of ordinary concrete:GB/T 50082—2009[S].Beijing: China Construction Industry Publishing House, 2009.
[12]刘志勇,马立国.高强混凝土的抗冻性与寿命预测模型[J].工业建筑,2005(1):11-14.
LIU Zhiyong, MA Liguo. Frost resistance and life prediction model of high strength concrete[J].Industrial building, 2005(1): 11-14.
[13]曹永康.解读“混凝土抗冻性的定量化设计”一文[J].混凝土与水泥制品,2011(7):1-3.
CAO Yongkang. Interpretation of “Quantitative design of frost resistance of concrete”[J].Concrete and Cement Products, 2011(7): 1-3.
[14]李金玉, 彭小平,曹建国,等.高贝利特水泥低热高抗裂大坝混凝土性能的研究[J].硅酸盐学报,2004(3):364-371.
LI Jinyu, PENG Xiaoping, CAO Jianguo, et al. Study on the properties of high belite cement dam concrete with low heat and high crack resistance[J]. Acta Silicate Sinica, 2004(3): 364-371.
[15]张秀梅.混凝土抗冻性的定量化设计[J].混凝土,2000(12):61-65.
ZHANG Xiumei. Quantitative design of frost resistance of concrete[J].Concrete, 2000(12): 61-65.

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备注/Memo

备注/Memo:
收稿日期:2022-11-11修回日期:2023-07-09
基金项目:陕西省自然科学基金资助项目(2018JQ5215); 校企联合基金资助项目(建筑垃圾再生产品研究与利用)
第一作者:李蕾蕾(1983—)，女，学士，正高级工程师，研究方向:砂石、混凝土、固废资源化利用.E-mail:5532452642@qq.com
更新日期/Last Update: 2023-08-28