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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.)

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.)

In order to overcome the disadvantage of poor mechanical properties of composite cementitious material system with large dosage, the response surface method was adopted to optimize the hybrid fiber composite cementitious material system, and the prediction model was established by taking the dosage of steel fiber, polypropylene fiber and desulphurization gypsum as the variable factors, and 28 d flexural strength and compressive strength of cement mortar as the evaluation indexes. Besides, the test of cement mortar and concrete was carried out to verify the predictive model. The results show that when the volume dosage of steel fiber is 0.4%, the volume dosage of polypropylene fiber is 0.116% and the mass dosage of desulphurization gypsum is 8%, the working and mechanical properties of composite materials reach the optimum, the predicted values of the 28 d flexural and compressive strength can be up to 7.0 and 37.4 MPa. The relative errors of flexural and compressive strength between the predicted values and the experimental values are only 2.86% and 1.32% and the standard deviation of the test values of flexural strength and compressive strength is 0.148 8 and 1.345 9, proving that the response surface method has high prediction precision, accuracy and scientificity. The optimisation effect of the composite cementitious material system is proved through this study, which provides a new solution idea and test basis for the multi-objective optimisation problem of composite materials. [ABSTRACT FROM AUTHOR]

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.)

To improve the fracture performance of recycled aggregate concrete (RAC), the effects of steel fiber, sisal fiber, and steel-sisal hybrid fiber on the fracture performance of RAC specimens were studied through three-point bending fracture tests. At the same time, digital image correlation (DIC) technology was used to measure the entire process of crack propagation in RAC specimens. The results show that the fracture performance of RAC specimens without fiber addition is poor, while the fracture performance of RAC specimens with fiber addition is significantly improved. When steel fiber is single doped, the cracking toughness is not related to fiber content. When sisal fiber is single doped, the optimal volume content is 0. 15%, the initiation load of RAC specimen is 67% higher than that of RAC specimen without fiber addition. Both single doped and hybrid fiber can improve instability toughness and fracture energy, but hybrid fiber has a better effect. When steel fiber with a volume fraction of 1. 0% and sisal fiber with a volume fraction of 0. 30% are mixed, initiation toughness, unstable toughness and fracture energy of RAC specimens increase by 83. 92%, 575. 86%, and 1 244. 05% compared with RAC specimen without fiber addition, respectively. [ABSTRACT FROM AUTHOR]

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.)