Long-Term Exposure Test of Concrete Surface Coating in Frozen Seawater Environment

Abstract

Abstract: In this paper, the bonding strength and chloride ion concentration of coatings were tested on the surface-coated concrete specimens exposed for 10 years and the solid structure of Qingdao Jiaozhou Bay Bridge. The long-term protective effect of the coatings applied to the concrete structure was studied. The results show that after 10 years exposure to the frozen seawater environment, the bonding strength of the coatings on the concrete in the atmospheric zone, the splash zone and the tidal zone all exceed 1.5 MPa, which still meets the requirements of current specifications. Compared with the tidal zone, the coatings on the marine concrete exposed in the splash zone and the atmospheric zone show better long-term protection. In the tidal zone, the apparent chloride ion diffusion coefficient of the coated concrete specimens is not significantly different from that of uncoated concrete. The surface chloride ion concentration of the coated concrete in the structure of the bridge is 2.3 to 3.9 times lower than that of the uncoated concrete, and the long-term chloride ion corrosion resistance of the coatings on the bridge is slightly weaker than that of the small-sized concrete specimens.

Key words: frozen seawater environment, coating, marine concrete, exposure experiment, structure test, bonding strength, chloride ion

CLC Number:

TU528

ZHANG Hong, ZHU Haiwei, YANG Haicheng, LI Yongchao. Long-Term Exposure Test of Concrete Surface Coating in Frozen Seawater Environment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(4): 1301-1307.

References

[1] 庞龙,应宗权,范志宏,等.基于实测数据的港工混凝土结构环境荷载模型及耐久性分析[J].工程力学,2016,33(s1):168-172.
PANG L, YING Z Q, FAN Z H, et al. Environmental load model and durability analysis of marine concrete structures based on in situ test data in South China[J]. Engineering Mechanics, 2016, 33(s1): 168-172 (in Chinese).
[2] 杨苹,李伟华,赵铁军.不同表面涂层对混凝土的防护效果[J].硅酸盐学报,2012,40(11):1613-1617.
YANG P, LI W H, ZHAO T J. Protective effect of surface coatings on concrete[J]. Journal of the Chinese Ceramic Society, 2012, 40(11): 1613-1617 (in Chinese).
[3] LI G, YANG B Y, GUO C S, et al. Time dependence and service life prediction of chloride resistance of concrete coatings[J]. Construction and Building Materials, 2015, 83: 19-25.
[4] 张铖,李维红,范金朋,等.不同防护涂层提升混凝土耐久性能研究[J].混凝土,2019(12):165-168.
ZHANG C, LI W H, FAN J P, et al. Study on durability of concrete structures strengthened by different protective coatings[J]. Concrete, 2019(12): 165-168 (in Chinese).
[5] 孙丛涛,康莉萍,赵霞,等.混凝土涂层的抗渗性能[J].硅酸盐通报,2016,35(5):1378-1384.
SUN C T, KANG L P, ZHAO X, et al. Permeability resistance of concrete coatings[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(5): 1378-1384 (in Chinese).
[6] AGUIRRE-GUERRERO A M, ROBAYO-SALAZAR R A, DE GUTIÉRREZ R M. A novel geopolymer application: coatings to protect reinforced concrete against corrosion[J]. Applied Clay Science, 2017, 135: 437-446.
[7] 於林锋.防护涂层对混凝土力学性能和耐久性的影响[J].新型建筑材料,2021,48(11):68-72.
YU L F. Effect of protective coating on mechanical properties and durability of concrete[J]. New Building Materials, 2021, 48(11): 68-72 (in Chinese).
[8] 韩超,杨建明,单春明,等.不同溶液长期浸泡下大流动性磷酸钾镁水泥基防腐涂层的性能[J].硅酸盐通报,2021,40(1):48-54.
HAN C, YANG J M, SHAN C M, et al. Performance of magnesium potassium phosphate cement-based anticorrosive coating with high fluidity under long-term soaking in different solutions[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(1): 48-54 (in Chinese).
[9] KHANZADEH MORADLLO M, SHEKARCHI M, HOSEINI M. Time-dependent performance of concrete surface coatings in tidal zone of marine environment[J]. Construction and Building Materials, 2012, 30: 198-205.
[10] 张铖,李维红,范金朋,等.相对法评价涂层混凝土冻融损伤[J].建筑材料学报,2020,23(3):546-551.
ZHANG C, LI W H, FAN J P, et al. Relative method for evaluating freeze-thaw damage of coated concrete[J]. Journal of Building Materials, 2020, 23(3): 546-551 (in Chinese).
[11] 杨海成,徐振山,田雨,等.我国北方海洋环境下混凝土结构表面涂层暴露试验研究[J].中国港湾建设,2014,34(11):34-37.
YANG H C, XU Z S, TIAN Y, et al. Exposure test on surface coating of marine concrete structure in North China[J]. China Harbour Engineering, 2014, 34(11): 34-37 (in Chinese).
[12] 王胜年,熊建波,王迎飞.青岛海湾大桥涂层设计与防腐施工指南[R].青岛:中交四航工程研究院有限公司,2008.
WANG S N, XIONG J B, WANG Y F. Guidelines for concrete coating design and anticorrosion construction of Qingdao Bay Bridge[R]. Qingdao: CCCC Fourth Harbor Engineering Institute Co. Ltd., 2008 (in Chinese).
[13] 中华人民共和国交通运输部.水运工程混凝土结构实体检测技术规程:JTS 239—2015[S].北京:人民交通出版社,2015.
Ministry of Communications of the People's Republic of China. Technical specification for solid inspection of concrete structure in port and waterway engineering: JTS 239—2015[S]. Beijing: China Communications Press, 2015 (in Chinese).
[14] 中华人民共和国交通运输部.水运工程混凝土试验检测技术规范:JTS/T 236—2019[S].北京:人民交通出版社,2019.
Ministry of Communications of the People's Republic of China. Technical specification for concrete test and inspection in port and waterway engineering: JTS/T 236—2019[S]. Beijing: China Communications Press, 2019 (in Chinese).
[15] 中华人民共和国交通运输部.水运工程结构耐久性设计标准:JTS 153—2015[S].北京:人民交通出版社,2015.
Ministry of Communications of the People's Republic of China. Standard for durability design of port and waterway engineering structure: JTS 153—2015[S]. Beijing: China Communications Press, 2015 (in Chinese).
[16] 倪静姁,汤雁冰,王胜年,等.混凝土涂层保护效果的暴露试验及实体调研研究[J].材料保护,2018,51(12):148-151+156.
NI J X, TANG Y B, WANG S N, et al. Exposure test and real engineering surveys on protection effect of concrete coatings[J]. Materials Protection, 2018, 51(12): 148-151+156 (in Chinese).
[17] THOMAS M, BENTZ D. Life 365: computer program for predicting the service life and life-cycle costs of reinforced concrete structures exposed to chlorides[C]//Nordic Mini Seminar and Fib TG 5.5 Meeting: Gothenburg, May 22-23, 2001.
[18] WANG G L, YE Z M, WU B. The change of stress on marine concrete covered with barnacles[J]. Applied Mechanics and Materials, 2014, 584/585/586: 1031-1034.
[19] 何晓宇,李天,沈坚,等.海洋生物附着对混凝土结构耐久性能影响[J].水利水运工程学报,2020,45(5):116-123.
HE X Y, LI T, SHEN J, et al. Influence of marine organisms adhesion on durability of concrete structures[J]. Hydro-Science and Engineering, 2020, 45(5): 116-123 (in Chinese).