Abstract
Iav fiberreinforced polymer (GFRP) tau lees tias yuav daws yog qhov kev txhim kho loj hauv kev ua kom muaj zog cov cuab yeej technology. Synthesis ntawm GFRP rov qab los ntawm kev siv cov iav ua ke ntev (cov khoom txhawb ntxiv) thiab tsis khovpolyester cobnrog 1% MEKP (matrix khoom) ntawm cov txheej txheem phau ntawv. GFRP rebars muaj txoj kab uas hla 12,5 hli (tus nqi no yog sib npaug li 0.5 nti; nws' s feem ntau muaj nyob hauv cov ntawv teev npe). GFRP qhov chaw ua haujlwm tau hloov kho los ntawm kev suav nrog cov xuab zeb ntxhib los txhawm rau txhawm rau txhim kho kev sib khi lub zog ntawm cov nyom nrog cov pob zeb. Tom qab ntawd, cov yam ntxwv ua haujlwm ntawm cov ntaub thaiv pob zeb ua kev tiv thaiv nrog GFRP rebars ua thiab piv nrog ntawd ntawm steel rov qab. Kev npaj cov qauv pob zeb ua pob zeb ua (cov pob zeb ua tsis tau ua tiav, du GFRP ua vaj tse ruaj khov, xuab zeb coated GFRP txhawb ua vaj tse thiab pob zeb ua kom muaj zog ntxiv) nrog cov sib npaug ntawm cov khoom sib xyaw (1: 1.5: 3) thiab 0.5W / C piv tau ua tiav ntawm ob lub hnub nyoog zoo (7 thiab 28) hnub nyob rau hauv qhov kub thiab txias. Tus nqi ntawmntim feemntawm GFRP thiab steel rov qab los rau hauv lub qhov ruaj khov yog (5 vol.%) sib npaug faib nrog cov kev cai sib txawv ntawm qhov pwm. Cov tshwm sim qhia tau tiastensile lub zogntawm GFRP rebar yog 593MPa thiab khoov zog yog 760MPa. Tuscompressive zogyog nyob rau hauv ntau yam tsim nyog ntawm cov qhob yog 25.67MPa. Tusflexural zogntawm kev ua tiav tsis ua tiav yog 3MPa thiab cov pob zeb ua kom muaj zog nrog GFRP rebar, tshwj xeeb tshaj yog cov xuab zeb coated GFRP RC muaj ua kom zoo dua qub zog yog 13.5MPa ua rau kom muaj kev sib koom tes ntxiv nrog cov pob zeb ua kom muaj zog thiab ua kom muaj zog ntau dua yog 10.5MPa ntawm 28 hnub dua li ntawm cov hlau ua kom muaj zog ntawm cov pob zebflexural hom.
