Yog tias peb hais tias cov pob zeb ua vaj tse yog cov khoom siv ua vaj tse nrov tshaj plaws thiab siv ntau tshaj plaws hauv ntiaj teb, yuav tsis muaj kev sib cav. Cov pob zeb ua vaj tse yog cov khoom siv ntau tshaj plaws hauv ntiaj teb, thib ob tsuas yog dej xwb.
Cov Pob Zeb Ua Los Ntawm Fiber Reinforced Concrete yog ib qho ntawm ntau yam kev tsim kho tshiab uas tau tsim los txhim kho cov yam ntxwv ntawm lub zog thiab lwm yam khoom ntawm cov pob zeb ua vaj tse.
Hauv tsab xov xwm no, peb yuav tshuaj xyuas cov pob zeb ua los ntawm cov fiber-reinforced concrete, cov pob zeb no yog dab tsi, nws cov hom sib txawv, thiab cov txiaj ntsig, thiab nrhiav seb cov pob zeb sib xyaw no puas yog rau koj.
Yog dab tsi Cov fiber Cov Pob Zeb Ua Los Ntawm Pob Zeb?
Cov pob zeb fiber-reinforced concrete (FRC) yog cov pob zeb tshiab uas muaj cov khoom siv fibrous. Piv txwv li, cov hlau ntev fibers. Txoj kev no ntawm kev txhawb zog txhim kho cov yam ntxwv ntawm cov pob zeb ib txwm muaj.
Muaj ntau yam khoom siv fiber ntau sib txawv siv los ua cov fiber-reinforced concrete. Hom reinforced concrete no tau nrov heev uas ntau hom fiber reinforced concrete raug tsim raws li qhov yuav tsum tau ua ntawm daim ntawv thov.
Cov Pob Zeb Ua Los Ntawm Fiber Reinforced Concrete Yog Dab Tsi?
Cov khoom xyaw tseem ceeb ntawm cov fiber-reinforced concrete yog:
Cov Cement Hydraulic
Cov khoom tseem ceeb ntawm cov pob zeb fiber-reinforced yog hydraulic cement, uas ua rau nplaum tom qab ua rau dej. Feem ntau, Portland cement yog siv ua hydraulic cement hauv cov pob zeb fiber-reinforced.
Cov fibers
Ntxiv cov fiber ntev hloov cov yam ntxwv ntawm cov pob zeb tshiab raws li hom khoom siv fibrous. Muaj plaub pawg ntawm cov fibers feem ntau siv rau hauv kev tsim cov fiber-reinforced concrete. Cov fibers concrete no yog:
Cov hlau fibers
Cov iav fiber
Cov xov paj ua los ntawm cov khoom siv hluavtaws
Cov fiber ntuj
Cov khoom sib xyaw ua ke
Cov pob zeb sib xyaw ua ke muab lub zog sib txuas hauv cov pob zeb ua vaj tse thaum txo cov cement uas xav tau. Qee cov pob zeb sib xyaw ua ke yog xuab zeb, pob zeb tawg, thiab xuab zeb.
Keeb Kwm Luv Luv ntawm FRC
FRC tau muaj ntev lawm, tab sis cov fibers concrete tau raug txhim kho. Thaum ub, thaum cov tsev tau tsim los ntawm kev siv pob zeb, mortar ua haujlwm ua tus neeg sawv cev khi lawv ua ke. Cov mortar tau txhawb nqa los ntawm kev siv cov plaub hau nees.
Ib yam li ntawd, thaum siv cov av nplaum ua vaj tse, cov quav ciab yog cov khoom siv tseem ceeb rau kev txhawb zog. Thaum cov pob zeb ua vaj tse yog ib qho ntawm cov khoom siv hauv tsev uas siv ntau tshaj plaws, cov fiber asbestos tau siv los ua cov khoom siv txhawb zog.
Txawm li cas los xij, thaum ntau xyoo dhau los, tib neeg tau paub ntau ntxiv txog kev pheej hmoo ntawm asbestos rau kev noj qab haus huv thiab nws ua rau mob qog noj ntshav li cas. Thaum xyoo 1960, es tsis txhob siv asbestos, lwm cov fibers xws li hlau thiab iav tau nrov npe.
Cov Fibers cuam tshuam li cas rau Concrete?
Ntxiv cov fibers rau hauv cov pob zeb ua rau muaj ntau yam teebmeem. Qhov loj ntawm cov no sib txawv raws li cov fibers tshwj xeeb siv. Kev txhim kho hauv lub peev xwm thauj khoom nyob ntawm ntau yam, xws li tus lej ntawm cov fibers reinforcing hauv kev sib raug zoo rau tag nrho cov ntim, hu ua qhov ntim feem, thiab qhov sib piv, tau los ntawm kev faib cov fiber ntev los ntawm txoj kab uas hla ntawm cov fiber hauv nqe lus nug.
Feem ntau cov fibers ua lub hom phiaj tseem ceeb ntawm kev txo qhov tawg hauv cov pob zeb los ntawm kev txhim kho nws lub zog flexural. Qhov tawg hauv cov pob zeb tshwm sim vim yog cov pob zeb shrinkage. Cov pob zeb shrinkage tuaj yeem tshwm sim rau ntau yam, xws li qhuav shrinkage thiab yas shrinkage.
Tsis tas li ntawd, cov fibers txo qhov permeability ntawm cov pob zeb ua vaj tse, tshem tawm qhov ua tau ntawm dej xau los ntawm cov qauv pob zeb ua vaj tse.
Cov Hom Fiber Reinforced Concrete Sib Txawv yog dab tsi?
Muaj ntau hom fiber-reinforced concrete composites uas nrov heev. Qee qhov ntawm cov no suav nrog:
Cov Hlau Fiber Reinforced Concrete
Cov hlau fiber reinforced concrete yog ib hom FRC uas siv dav tshaj plaws. Kev ntxiv cov hlau fiber reinforced steel rau hauv cov concrete, txawm tias me me xwb los, ua rau muaj kev txhim kho zoo heev rau cov yam ntxwv ntawm cov concrete.
Cov hlau fiber reinforced concrete yog siv rau hauv cov ntawv thov nrog cov kev xav tau ntawm cov pob zeb hnyav xws li choj, pem teb, qhov av, kev khawb av, kev ua precast, thiab lwm yam.
Muaj ntau hom hlau fibers sib txawv siv los txhawb cov pob zeb ua vaj tse, xws li hlau txias rub (Hom 1), hlau ntawv txiav (Hom 2), yaj rho tawm (Hom 3), txiav zeb (Hom 4), thiab hlau txias rub hloov kho (Hom 5).
Cov Pob Zeb Ua Los Ntawm Polypropylene Fiber (PFRC)
PFRC siv cov xov paj yas hu ua Polypropylene fibers, ib hom thermoplastic. Muaj ntau yam txiaj ntsig ntawm kev ntxiv polypropylene rau hauv cov pob zeb ua vaj tse, uas peb yuav tham txog hauv ntu tom ntej.
Polypropylene muaj ntau yam ntxwv zoo li polythene, nrog rau cov khoom tawv dua, lub zog flexural, thiab kev tiv taus cua sov siab dua.
Tsis tas li ntawd xwb, cov fiber no muaj kev tiv thaiv zoo rau cov tshuaj xws li cov kua qaub thiab cov kuab tshuaj organic, thiab nws muab cov khoom zoo sib xws rau cov pob zeb ua vaj tse.
Cov Iav Fiber Reinforced Concrete (GFRC)
Cov khoom sib xyaw ua los ntawm cov iav fiber muaj ntau cov khoom me me uas yog iav. Cov no ua li cas thiaj ua rau cov khoom sib xyaw ua kom muaj zog dua?
Txawm hais tias lub iav loj yog qhov mos, cov iav fiber muaj lub zog siab heev. Ntxiv rau qhov muaj zog no, cov fibers yog cov khoom siv ntxiv uas pheej yig, ua rau cov khoom sib tov ua vaj tse kawg pheej yig dua li lwm txoj hauv kev xws li cov hlau fiber reinforced concrete.
Cov fibers tib yam ntxiv rau cov yas ua rau cov khoom siv fiberglass sib xyaw nrog cov khoom siv tensile zoo heev.
Cov Pob Zeb Ua Los Ntawm Polyester Fiber
Cov polyester fibers rau cov fiber-reinforced concrete muaj nyob rau hauv cov microfibers thiab macro fibers. Polyester fibers pab txhawb rau kev txhim kho kev tiv thaiv kev tawg ntawm cov fiber-reinforced concrete no.
Cov pob zeb ua los ntawm polyester fiber muaj zog dua thiab muaj kev ruaj khov dua. Nws qhov kev ruaj khov dua ua rau hom pob zeb no zoo tagnrho rau kev siv hauv pem teb rau kev lag luam, hauv pem teb rau tsev rau khoom, cov qauv precast, cov overlays, thiab cov kev siv lag luam zoo sib xws.
Cov Khoom Siv Carbon Fiber Uas Muaj Zog
Koj puas tau hnov dua txog cov hlau carbon fiber? Lub tswv yim zoo sib xws rau cov carbon fiber reinforced concrete.
Txawm hais tias kev ntxiv cov carbon fiber rau hauv cov pob zeb ua vaj tse yog ib qho txheej txheem nyuaj dua li kev ntxiv cov cement lossis iav, cov pob zeb ua vaj tse uas tshwm sim muaj kev ruaj khov thiab lub zog siab. Txawm li cas los xij, nrog kev ruaj khov siab, cov pob zeb ua vaj tse yuav tawg yooj yim dua (zoo li cov hlau carbon).
Macro Synthetic Fiber Cov Pob Zeb Ua Los Ntawm Cov Hlau
Kev siv cov xov paj ua los ntawm cov khoom siv loj hauv cov pob zeb ua vaj tse tau los ua lwm txoj hauv kev hloov cov hlau txhawb nqa. Txawm li cas los xij, cov hlau txhawb nqa tuaj yeem yog qhov kim ntxiv rau cov pob zeb ua vaj tse.
Nrog kev siv ntau zuj zus, cov xov paj macro synthetic tau dhau los ua ntau dua li lwm txoj hauv kev. Cov xov paj no muaj ntau daim ntawv thov ntawm lawv tus kheej, tshwj xeeb tshaj yog hauv cov qauv hauv av.
Cov hlau txhawb nqa yuav xeb hauv cov cheeb tsam uas muaj av noo ntau, xws li cov chaw nyob hauv dej hiav txwv, thiab cov iav fibers raug kev pheej hmoo ntawm kev tawg. Cov macro synthetic fibers muaj kev tiv taus siab rau cov yam no, yog li lawv yog qhov ntxiv muaj txiaj ntsig rau cov pob zeb hauv cov chaw no.
Cov Pob Zeb Ua Los Ntawm Cov Khoom Siv Fiber Ntuj
Cov xov ntuj tsim los ntawm cov nroj tsuag, tsiaj txhu, thiab cov zaub mov ntuj. Raws li peb tau hais hauv ntu txog keeb kwm ntawm FRC, cov xov ntuj tau siv rau hauv cov txheej txheem tsim kho txij li thaum ub.
Txawm siv cov pob zeb ua vaj tse nyob qhov twg los xij, yuav muaj ntau cov fiber ntuj tsim. Cov fiber no kuj pab txo tus nqi ntawm kev tsim FRC.
Qee cov fiber ntuj muaj xws li paj rwb, straw, ntoo, thiab nplej.
Cov txiaj ntsig ntawm kev siv cov fiber reinforced concrete yog dab tsi?
Ntxiv cov fibers sib txawv rau hauv cov pob zeb ua rau muaj ntau yam txiaj ntsig. Cov pob zeb ua los ntawm cov fiber reinforced concrete raug faib ua pawg raws li cov fiber ntxiv. Cov txiaj ntsig tshwj xeeb ntawm FRC yuav nyob ntawm hom FRC siv.
Feem ntau, ntawm no yog cov txiaj ntsig cuam tshuam nrog qee hom fiber-reinforced concrete:
Kev Txhawb Nqa Iav Fiber
Kev siv cov iav fiber ntxiv dag zog rau cov pob zeb ua vaj tse kom muaj zog ntxiv yam tsis ua rau tus nqi nce ntxiv ntau. Iav yog ib qho ntawm cov khoom siv fiber pheej yig tshaj plaws.
Hom kev txhawb zog no yog siv los txhim kho qhov zoo nkauj ntawm cov qauv pob zeb. Cov xov luv luv tuaj yeem pom hauv cov qauv pob zeb tom qab nws qhuav.
Txoj kev txhawb zog no ntxiv lub zog tensile rau txhua qhov chaw, tsis zoo li kev txhawb zog ib txwm siv cov hlau tuav, qhov twg lub zog tensile tsuas yog txwv rau qhov kev taw qhia ntawm cov tuav.
Kev Txhawb Nqa Hlau Fiber
Cov hlau muab lub zog siab tshaj plaws hauv cov pob zeb fiber reinforced.
Nrog rau kev ntxiv cov hlau fibers, cov pob zeb ua vaj tse xav tau tsawg dua cov hlau reinforcements.
Cov fibers tsim cov kev cuam tshuam zoo dua tiv thaiv kev cuam tshuam thiab kev puas tsuaj.
Txhim kho qhov kev tiv taus kev yaj thiab lwm yam ntxwv ntawm qhov kub ntawm lub tsev.
Txo qhov kev pheej hmoo ntawm kev tawg los ntawm kev txo qhov dav ntawm cov kab nrib pleb.
Cov Polypropylene Fibers thiab Nylon Concrete Reinforcement
Muab lub peev xwm los twj cov pob zeb mus deb heev los ntawm kev ua kom cov khoom sib koom ua ke.
Txhim kho cov yam ntxwv ntawm qhov kub thiab txias (piv txwv li, tiv taus kev yaj).
Ua kom cov pob zeb ua kom lub zog thiab txo nws qhov brittle xwm.
Thaum muaj hluav taws kub, cov qauv pob zeb ua los ntawm cov polypropylene fibers thiab nylon fibers tiv taus kev tawg.
Cov txiaj ntsig ua rau muaj kev cuam tshuam siab thiab kev tiv thaiv kev puas tsuaj.
Cov Kev Siv Cov Fiber Reinforced Concrete Yog Dab Tsi?
Hom FRC siv tau txawv raws li qhov project tsim kho. Feem ntau, feem ntau cov project civil engineering siv FRC. Piv txwv li::
Phab ntsa
Pem teb
Cov pas dej
Cov kev khiav tsheb
Txoj Kev
Cov kav dej ua los ntawm pob zeb
Cov Choj
Cov plag tsev rau khoom
Cov qhov dej
Cov qhov av
Kev Taug Kev
Yuav ua li cas thiaj nrhiav tau cov khoom siv fiber reinforced concrete?
Raws li koj paub tam sim no, cov fiber-reinforced concrete tsis yog ib yam khoom xwb. Muaj ntau hom concretes sib txawv nrog cov txheej txheem sib txawv uas ua rau muaj cov yam ntxwv tshwj xeeb.
Muaj cov hlau fibers muaj zog heev uas ua rau cov qauv ntawm cov manifold concrete zoo dua. Tsis tas li ntawd, cov iav thiab cov khoom siv fibrous hluavtaws muaj zog nruab nrab tab sis pheej yig dua.
LOS NTAWM Daniel Arkin
Lub sijhawm tshaj tawm: Plaub Hlis-07-2023