Yog tias peb tau hais tias pob zeb yog cov khoom siv hauv tsev nrov tshaj plaws hauv ntiaj teb, yuav tsis muaj kev sib cav. Pob zeb yog cov khoom siv tshaj plaws hauv ntiaj teb, thib ob tsuas yog dej.
Fiber Reinforced Concrete yog ntawm ntau qhov kev tsim kho tshiab tsim los txhim kho cov yam ntxwv ntawm lub zog thiab lwm yam khoom ntawm pob zeb.
Hauv tsab xov xwm no, peb yuav tshuaj xyuas cov pob zeb siv fiber ntau, cov pob zeb no yog dab tsi, nws ntau hom, thiab cov txiaj ntsig, thiab nrhiav seb qhov sib xyaw ua ke no puas yog rau koj.
Dab tsi yogFiber ntauReinforced Concrete?
Fiber-reinforced qhob (FRC) yog cov pob zeb tshiab tshiab nrog cov ntaub ntawv fiber ntau. Piv txwv li, ntev steel fibers. Cov txheej txheem ntawm kev txhawb nqa no txhim kho cov khoom ntawm cov pob zeb qub.
Ntau cov ntaub ntawv fiber ntau sib txawv yog siv los ua cov pob zeb fiber ntau. Qhov no hom ntawm reinforced pob zeb tau ua nrov heev uas ntau yam versions ntawm fiber reinforced pob zeb yog tsim raws li daim ntawv thov.
Fiber Reinforced Concrete yog dab tsi?
Cov khoom xyaw tseem ceeb ntawm fiber ntau pob zeb yog:
Hydraulic Cement
Lub ntsiab tseem ceeb ntawm fiber-reinforced qhob yog hydraulic cement, uas ua nplaum tom qab reacting nrog dej. Feem ntau, Portland cement yog siv los ua hydraulic cement hauv fiber ntau pob zeb.
Fibers
Ntxiv cov fibers ntev hloov cov khoom ntawm cov pob zeb tshiab raws li cov khoom siv fiber ntau siv. Muaj plaub pawg ntawm fibers feem ntau siv los ua cov khoom siv fiber ntau. Cov pob zeb fiber ntau yog:
Hlau fibers
iav fibers
Synthetic fibers
Ntuj fibers
Aggregates
Ib qho aggregate muab lub zog khi hauv pob zeb thaum txo qhov ntim ntawm cov cement xav tau. Qee qhov sib xyaw ua ke yog xuab zeb, pob zeb crushed, thiab gravel.
Keeb kwm ntawm FRC
FRC tau nyob ib puag ncig ntev, tab sis cov pob zeb ua kom zoo dua qub. Nyob rau hauv lub sijhawm dhau los, thaum lub tsev tau tsim los siv pob zeb, mortar ua tus neeg sawv cev tuav lawv ua ke. Lub mortar tau ntxiv dag zog siv horsehair.
Ib yam li ntawd, nyob rau hauv cov ntaub ntawv ntawm av nkos-brick kev tsim kho, straw yog thawj cov khoom siv ntxiv dag zog. Thaum cov pob zeb ua ib qho ntawm cov khoom siv hauv tsev ntau tshaj plaws, asbestos fibers tau siv los ua kev txhawb nqa.
Txawm li cas los xij, raws li ntau xyoo dhau los, tib neeg tau paub ntau ntxiv txog kev noj qab haus huv ntawm asbestos thiab nws ua rau mob qog noj ntshav li cas. Thaum xyoo 1960, tsis yog asbestos, lwm cov fibers xws li hlau thiab iav tau txais koob meej.
Dab tsi yog qhov cuam tshuam ntawm Fibers rau pob zeb?
Ntxiv fibers rau pob zeb ua rau muaj ntau yam teebmeem. Qhov loj ntawm cov no txawv raws li cov fibers tshwj xeeb siv. Kev txhim kho hauv kev thauj khoom muaj peev xwm nyob ntawm ntau yam, xws li tus naj npawb ntawm cov fibers reinforcing nyob rau hauv tag nrho cov ntim, hu ua lub ntim feem, thiab qhov sib piv, tau los ntawm kev faib fiber ntau ntev los ntawm txoj kab uas hla ntawm cov fiber ntau hauv nqe lus nug.
Fibers feem ntau ua rau lub hom phiaj tseem ceeb ntawm kev txo qhov tawg ntawm cov pob zeb los ntawm kev txhim kho nws lub zog flexural. Kev tawg hauv pob zeb tshwm sim vim yog pob zeb shrinkage. Concrete shrinkage tuaj yeem tshwm sim rau ntau yam, xws li ziab shrinkage thiab yas shrinkage.
Tsis tas li ntawd, fibers txo qis permeability ntawm pob zeb, tshem tawm qhov ua tau ntawm cov dej los ntawm cov pob zeb ua vaj tse.
Dab tsi yog qhov txawv ntawm Fiber Reinforced Concrete?
Muaj ntau hom fiber ntau-reinforced qhob composites hauv cov ntawv thov nrov. Qee qhov no suav nrog:
Steel Fiber Reinforced Concrete
Steel fiber reinforced qhob yog ib qho ntawm ntau hom FRC. Ntxiv kev txhawb nqa steel fibers rau cov pob zeb, txawm tias me me, ua rau muaj kev txhim kho tseem ceeb hauv cov khoom ntawm cov pob zeb.
Steel fiber reinforced qhob yog siv nyob rau hauv daim ntawv thov nrog hnyav-lub luag hauj lwm ua vaj tse, xws li txuas hniav, pem teb, tunnels, mining, precasts, thiab lwm yam.
Muaj ntau ntau hom steel fibers siv los txhawb kev ua vaj tse, xws li txias-daws hlau (Hom 1), txiav ntawv steel fibers (Hom 2), yaj muab rho tawm (hom 3), zeb txiav (hom 4), thiab hloov txias kos hlau (Hom 5).
Polypropylene Fiber Reinforced Concrete (PFRC)
PFRC siv cov khoom siv hluavtaws hu ua Polypropylene fibers, ib hom thermoplastic. Muaj ntau ntau yam txiaj ntsig ntawm kev ntxiv polypropylene rau pob zeb, uas peb yuav tham hauv ntu tom ntej.
Polypropylene qhia ntau yam ntxwv nrog polythene, nrog kev txhim kho hardened zog, flexural zog, thiab siab dua kub ua hauj.
Tsis tas li ntawd, cov fiber ntau no muaj kev tiv thaiv siab tiv thaiv cov tshuaj xws li acids thiab cov kuab tshuaj organic, thiab nws muab cov khoom zoo sib xws rau cov pob zeb.
iav Fiber Reinforced Concrete (GFRC)
Ib qho iav fiber ntau cov pob zeb sib xyaw ua ke suav nrog ntau cov iav me me. Yuav ua li cas cov no ua kom cov pob zeb muaj zog?
Thaum lub iav loj pane yog qhov muag heev, iav fiber ntau muaj lub zog zoo heev. Ntxiv nrog rau qhov no lub zog, cov fibers yog cov khoom siv qis qis, ua rau qhov sib xyaw ua ke zaum kawg pheej yig dua li lwm yam xws li steel fiber reinforced pob zeb.
Tib fibers ntxiv rau cov yas ua rau cov khoom siv fiberglass uas muaj zog tensile zoo heev.
Polyester Fiber Reinforced Concrete
Polyester fibers rau fiber ntau pob zeb muaj xws li microfibers thiab macro fibers. Polyester fibers pab txhawb kev txhim kho kev sib tsoo ntawm hom fiber ntau-reinforced pob zeb.
Polyester fiber-reinforced pob zeb muaj ntau dua toughness thiab ntau dua structural kev ncaj ncees. Nws txhim khu kev ruaj khov ua rau hom pob zeb no zoo tagnrho rau kev lag luam hauv pem teb, warehouse flooring, precast structures, overlays, and similar commercial applications.
Carbon Fiber Reinforced Concrete
Koj puas tau hnov cov pa roj carbon fiber ntau? Lub tswv yim zoo sib xws rau carbon fiber reinforced pob zeb.
Thaum ntxiv cov pa roj carbon fiber ntau rau pob zeb yog txheej txheem nyuaj dua li kev ntxiv cov cement lossis iav, cov pob zeb ua rau muaj kev nruj thiab lub zog. Txawm li cas los xij, nrog kev nruj nruj, cov pob zeb ua ntau nkig (xws li carbon steel).
Macro Synthetic Fiber ntauReinforced Concrete
Kev siv macro hluavtaws fibers hauv pob zeb tau los ua lwm txoj hauv kev ntxiv rau steel. Tom qab tag nrho, steel reinforcement yuav yog ib qho kim ntxiv rau pob zeb.
Nrog kev siv loj hlob, macro hluavtaws fibers tau dhau los ua ntau dua li lwm txoj hauv kev. Cov fibers no muaj ntau yam kev siv ntawm lawv tus kheej, tshwj xeeb tshaj yog nyob rau hauv av-txhawb cov qauv.
Steel reinforcement tej zaum yuav corrode nyob rau hauv cov cheeb tsam nrog high humidity, xws li marine ib puag ncig, thiab iav fibers raug kev txom nyem los ntawm kev pheej hmoo ntawm spalling. Macro hluavtaws fibers muaj kev tiv thaiv siab rau cov yam ntxwv no, yog li lawv yog qhov tseem ceeb ntxiv rau cov pob zeb hauv cov cheeb tsam no.
Natural Fiber Reinforced Concrete
Ntuj fibers los ntawm cov nroj tsuag, tsiaj txhu, thiab tej yam ntuj tso minerals. Raws li peb tau hais nyob rau hauv nqe lus hais txog keeb kwm ntawm FRC, ntuj fibers tau siv nyob rau hauv txoj kev tsim kho txij thaum ub.
Txawm nyob qhov twg cov pob zeb siv, yuav muaj ib tug ntau ntawm natural fibers tam sim no. Cov fibers no kuj pab txo tus nqi ntawm kev tsim FRC.
Qee cov fibers ntuj muaj xws li paj rwb, straw, ntoo, thiab nplej.
Dab tsi yog Cov txiaj ntsig ntawm Kev Siv Fiber Reinforced Concrete
Ntxiv cov fibers sib txawv rau cov pob zeb ua rau muaj ntau yam txiaj ntsig. Fiber-reinforced qhob yog cais raws li cov fiber ntau ntxiv. Cov txiaj ntsig tshwj xeeb ntawm FRC yuav nyob ntawm seb hom FRC siv.
Feem ntau, ntawm no yog cov txiaj ntsig cuam tshuam nrog qee hom kev siv fiber ntau ntxiv:
iav Fiber Reinforcement
iav fiber reinforcement ua rau kom muaj zog ntawm cov pob zeb ua kom tsis muaj nqi ntxiv. iav yog ib qho ntawm cov khoom siv fiber ntau uas pheej yig tshaj.
Hom kev txhawb nqa no yog siv los txhim kho qhov zoo nkauj ntawm cov pob zeb ua qauv. Qhov luv luv discrete fibers tuaj yeem pom hauv cov qauv pob zeb tom qab nws qhuav.
Txoj kev txhawb nqa no ntxiv lub zog tensile rau tag nrho cov cheeb tsam, tsis zoo li cov tsoos reinforcement siv steel tuav, qhov twg lub tensile lub zog yog txwv rau cov kev taw qhia ntawm tuav.
Hlau Fiber Reinforcement
Hlau muab lub zog zoo tshaj plaws nyob rau hauv fiber reinforced pob zeb.
Nrog rau qhov sib ntxiv ntawm cov hlau fibers, cov pob zeb yuav tsum muaj tsawg dua steel bar reinforcements.
Fibers ua rau muaj kev cuam tshuam ntau dua tiv thaiv kev cuam tshuam thiab kev puas tsuaj.
Txhim kho thaw kuj thiab lwm yam kub yam ntxwv ntawm lub tsev.
Mitigates qhov kev pheej hmoo ntawm kev tawg los ntawm kev txo qhov dav ntawm cov kab nrib pleb.
Polypropylene Fibers thiab Nylon Concrete Reinforcement
Muab lub peev xwm los tso cov pob zeb hla qhov ntev los ntawm kev ua kom muaj zog cohesion.
Txhim kho qhov kub thiab txias (piv txwv li, thaw kuj).
Txhim kho cov ductility ntawm pob zeb thiab txo nws cov xwm txheej.
Thaum muaj hluav taws kub, cov pob zeb ua vaj tse nrog polypropylene fibers thiab nylon fibers yog resistant rau tawg spalling.
Ua rau muaj kev cuam tshuam tsis zoo thiab kev puas tsuaj.
Dab tsi yog Daim Ntawv Thov ntawm Fiber Reinforced Concrete?
Hom FRC siv tuaj yeem sib txawv raws li qhov kev tsim kho tshwj xeeb. Feem ntau, cov haujlwm engineering feem ntau siv FRC. Piv txwv li::
Phab ntsa
Pem teb
Dams
Txoj kev khiav
Txoj kev
Cov kav dej
Cov choj
Warehouse floors
Manholes
Qhov tob
Pavements
Yuav Ua Li Cas Tau Txais Fiber Reinforced Concrete?
Raws li koj paub los ntawm tam sim no, fiber ntau pob zeb tsis yog ib yam khoom xwb. Muaj ntau qhov sib txawv nrog cov txheej txheem kev txhawb zog sib txawv uas ua rau muaj kev txhim kho tshwj xeeb.
Muaj ntau lub zog steel fibers uas ua rau kom muaj kev ncaj ncees ntawm cov qhob manifold. Tsis tas li ntawd, cov iav thiab cov khoom siv hluavtaws fiber ntau muab lub zog nruab nrab tab sis ntawm tus nqi pheej yig dua.
Los ntawm Daniel Arkin
Post lub sij hawm: Apr-07-2023