Abstract
In this paper, an experimental study was conducted on the influence of water pressure on concrete strength. Specimens were put in a self‐designed device, applying 0–4 MPa water pressure on concrete, and then taken out for both static and dynamic compressive tests. Results showed that high water pressure caused inevitable damage to concrete, leading to 13.4% reduction in strength under 4 MPa water pressure. Specimens with lower strength grade were damaged more severely while under the same water pressure. Also, as water pressure increased, the moisture content of concrete grew linearly, and the trend for specimens with higher compressive strength was slower. A correlation was established between the water content increment and the reduction rate of strength. Moreover, the dynamic compressive strength decreased as water pressure increased but still higher than the static strength, illustrating an apparent strain rate effect. Meanwhile, water pressure and moisture content increment barely had any influence upon DIF within the testing conditions. Furthermore, equations for calculating both static and dynamic reduction rates of strength were built, based either on water pressure or on moisture content increment caused by that. Equations for strength prediction were also provided.
Highlights
A series of 300 m high arch dams have been constructed in the high seismic areas among Midwest China, such as Xiaowan Arch Dam (292 m), Jinping-I Arch Dam (305 m), Xiluodu Project (278 m), and Baihetan Arch Dam (289 m), and more will be constructed [1]. e water pressure on dam concrete approaches to 3 MPa
The influence of water pressure on concrete was studied by experiments
Both static and dynamic compression tests were carried out on specimens subjected to different water pressure environments, investigating the influence of water pressure on static and dynamic strength of concrete. e conclusions can be drawn as follows: (1) High water pressure causes inevitable damage to concrete
Summary
A series of 300 m high arch dams have been constructed in the high seismic areas among Midwest China, such as Xiaowan Arch Dam (292 m), Jinping-I Arch Dam (305 m), Xiluodu Project (278 m), and Baihetan Arch Dam (289 m), and more will be constructed [1]. e water pressure on dam concrete approaches to 3 MPa. According to Ross [9], the accumulation of moisture content would increase the rate sensitivity and dynamic compressive strength of concrete under the strain rate of 1/s–10/s. Reinhardt et al [8] concluded based on tests that when the loading rate was between 0.5/s and 1.25/s, the strain rate effect of wet concrete was apparent. Wang et al [14] reported the nonlinear decrease of static compressive strength when water pressure increased from 0 to 10 MPa. Results of Van Der Wegen et al [15] illustrated that almost no negative impact had high water pressure (10 MPa) on concrete strength. E static and dynamic compressive strength of concrete under 0–4 MPa water pressure was investigated experimentally, and their changing pattern was analyzed. An interpretation of the underlying mechanism of these changes was provided
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