Development of an Improved Crack Propagation Model for Corrosion-Induced Cover Cracking in RC Structures

2nd International Conference on Civil Engineering and Materials Science

Hilyati, S.^1 ; Nizam, Z.M.^1,2 ; Zurisman, M.A.A.^1 ; Azhar, A.T.S.^1,2

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn, Malaysia (UTHM), Johor, Batu Pahat

86400, Malaysia^1

Research Centre for Soft Soil (RECESS), Universiti Tun Hussein Onn Malaysia (UTHM), Johor, Batu Pahat

86400, Malaysia^2

关键词: Accelerated corrosion tests;    Chloride attack;    Crack propagation model;    Experimental program;    Marine environment;    Reinforcing bar;    Severe corrosion;    Transverse reinforcement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/216/1/012019/pdf
DOI  :  10.1088/1757-899X/216/1/012019

来源: IOP

【 摘 要 】

During the last two decades, reinforced concrete (RC) has been extensively used in most of the world as one of the common construction material due to its advantages and durability. However, RC structures exposed to marine environments are subjected to chloride attack. Chlorides from seawater penetrate into RC structures are not only causing severe corrosion problems but also affect the durability and serviceability of such structures. This paper investigates the influence of transverse reinforcement and spacing of reinforcing bars on concrete cover cracking of two-way RC slab specimens using accelerated corrosion tests. The experimental program involved the testing of four RC slab specimens and was generally designed to observe the crack width and the time of crack to propagate. An improved model for predicting the timing of crack propagation based on the experimental data was then developed.