PMID- 31731644 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 1996-1944 (Print) IS - 1996-1944 (Electronic) IS - 1996-1944 (Linking) VI - 12 IP - 22 DP - 2019 Nov 15 TI - Mechanical Properties of Carbon-Fiber RPC and Design Method of Carbon-Fiber Content under Different Curing Systems. LID - 10.3390/ma12223759 [doi] LID - 3759 AB - Natural, standard, and compound curing are adopted to study the effect of different curing systems on the reinforcement of carbon fiber in reactive powder concrete (RPC). This work systematically studies the changes in RPC compressive and tensile strengths under different curing systems. Taking age, fiber content, and curing system as parameters, Scanning electron microscope (SEM) and X-ray diffraction (XRD) microscopic methods are used to study the influencing mechanism of carbon-fiber content and curing systems on RPC. The calculation methods of the RPC strength of different carbon-fiber contents are studied. Results show that the optimum carbon-fiber content of carbon-fiber RPC is 0.75% under the natural, standard, and compound curing conditions. In comparison with standard curing, compound curing can improve the early strength of carbon-fiber RPC and slightly affect the improvement of late strength. The strength is slightly lower in natural curing than in standard curing, but the former basically meets the requirements of the project and is beneficial for the practical application of this project. The calculation formula of 28-day compressive and splitting tensile strengths of carbon-fiber content from 0% to 0.75% is proposed to select the carbon-fiber content flexibly to satisfy different engineering requirements. FAU - Zhang, Xuejian AU - Zhang X AD - School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130000, China. FAU - Ge, Lincai AU - Ge L AD - School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130000, China. FAU - Zhang, Yunlong AU - Zhang Y AD - School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130000, China. FAU - Wang, Jing AU - Wang J AD - School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130000, China. LA - eng GR - 20190303138SF/Department of Science and Technology of Jilin Province/ PT - Journal Article DEP - 20191115 PL - Switzerland TA - Materials (Basel) JT - Materials (Basel, Switzerland) JID - 101555929 PMC - PMC6888528 OTO - NOTNLM OT - building materials OT - calculation formula OT - carbon-fiber content OT - curing system OT - mechanical properties OT - microscopic OT - reactive powder concrete COIS- The authors declare no conflicts of interests. EDAT- 2019/11/17 06:00 MHDA- 2019/11/17 06:01 PMCR- 2019/11/15 CRDT- 2019/11/17 06:00 PHST- 2019/10/09 00:00 [received] PHST- 2019/11/08 00:00 [revised] PHST- 2019/11/11 00:00 [accepted] PHST- 2019/11/17 06:00 [entrez] PHST- 2019/11/17 06:00 [pubmed] PHST- 2019/11/17 06:01 [medline] PHST- 2019/11/15 00:00 [pmc-release] AID - ma12223759 [pii] AID - materials-12-03759 [pii] AID - 10.3390/ma12223759 [doi] PST - epublish SO - Materials (Basel). 2019 Nov 15;12(22):3759. doi: 10.3390/ma12223759.