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Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Due to the existence of hardened mortar and a large number of interface structures on the surface of recycled coarse aggregate, the compressive strength of recycled concrete is lower than that of ordinary concrete, and the compressive failure mechanism is much more complicated. To establish a universal calculation formula for compressive strength of recycled coarse concrete, recycled concrete was prepared by three kinds of recycled coarse aggregates with different replacement rates in the experiment. The effect of binder-water ratio and quality and replacement rate of recycled coarse aggregate on the compressive strength of recycled concrete was studied systematically, and the correlation between the water absorption, apparent density and crushing index of recycled coarse aggregate and its influence factors was analyzed. Based on the Bolomey compressive strength formula of normal concrete, the formula of compressive strength of recycled coarse aggregate concrete based on aggregate quality and replacement rate was established and compared with the commonly used compressive strength formula in terms of error comparison. The results show that it has a linear relationship between the compressive strength of recycled coarse aggregate concrete and the binder-water ratio and replacement rale. The quality of recycled coarse aggregate has a significant effect on the compressive strength of recycled concrete. The error analysis shows that, compared with the test results, the maximum calculation error of Bolomey formula for the compressive strength of ordinary concrete is about 16.51%, and the maximum calculation error of the compressive strength of recycled coarse aggregate concrete based on effective binder-water ratio is about 36. 33% , but the maximum calculation error of the compressive strength of recycled concrete based on different quality and replacement rate of recycled coarse aggregate is only 4. 90%. Therefore, the newly established compressive strength formula of recycled coarse aggregate concrete has higher accuracy and better applicability. [ABSTRACT FROM AUTHOR]