Cov pob zeb Fiber ntau ntxiv tam sim no (SFRC) yog cov khoom siv sib xyaw tshiab uas tuaj yeem muab hliv rau cov khoom lag luam luv luv rau hauv cov pob zeb ua kom zoo nkauj. Nws tau tsim kho kom sai nyob hauv tsev thiab txawv teb rau hauv xyoo tsis ntev los no. Nws kov yeej cov kev ua luv ntawm lub zog tensile qis, me me elongation thiab cov cuab yeej loj ntawm cov pob zeb ua. Nws muaj cov khoom tau zoo xws li tensile lub zog, bending tsis kam, shear tsis kam, tawg tsis kam, nkees tsis kam thiab siab heev. Nws tau thov nyob rau hauv hydraulic engineering, txoj kev thiab choj, kev tsim kho thiab lwm yam chaw engineering.
1. Kev Loj Hlob Ntawm Cov Hlau Fiber Comments
Fiber ntau txhawb kev ua vaj tse (FRC) yog cov lus luv ntawm fiber ntau txhawb kev ua vaj tse. Nws yog feem ntau yog Maas-raws li kev sib xyaw ua ke ntawm cov cement muab tshuaj nplaum, tshuaj khib lossis pob zeb ua hlau lossis pob zeb roj fiber ntau lossis cov organic fiber ntau. Nws yog lub tsev tshiab tsim los ntawm uniformly dispersing luv luv thiab zoo tensile lub zog, siab kawg elongation, siab alkali tsis kam nyob rau hauv pob zeb pob zeb ua pob zeb. Fiber ntau hauv cov pob zeb ua tau txwv tsis pub dhau cov kev tawg ua ke ntawm kev ua kom muaj zog, muaj zog ntxiv ntawm cov pob zeb tsis zoo, thiab txhim kho kev ua tau zoo ntawm impermeabentability, waterproof, khov rau kev tiv thaiv thiab kev tiv thaiv qhov cuab lub zog ntawm cov pob zeb. Fiber ntau txhawb kev ua vaj tse, tshwj xeeb tshaj yog cov pob zeb fiber ntau ntxiv, tau nyiam ntau dua thiab ntau dua kev ua kom zoo dua thiab muaj cov voj voog engineering hauv kev tsim kho vaj tse vim tias nws kev ua haujlwm zoo dua. 1907 Soviet Tus Kws Tshaj Lij B п. Hekpocab pib siv cov hlau fiber ntau txhawb pob zeb ua; Xyoo 1910, HF Porter luam tawm cov ntaub ntawv tshawb fawb txog kev txhawb nqa fiber ntau yuav tsum muaj tusyees dispersed rau hauv cov pob zeb ua kom muaj zog ntxiv cov ntaub ntawv; Xyoo 1911, Graham ntawm Tebchaws Meskas ntxiv cov fiber ntau fiber ntau rau hauv cov pob zeb ua kom zoo thiab muaj zog ntawm cov pob zeb; Los ntawm xyoo 1940, Tebchaws Askiv, Fabkis, Nyiv thiab lwm lub tebchaws tau ua ntau cov pob zeb ua kom zoo nkauj, thiab txhim kho cov cov duab ntawm cov hlau fiber los txhim kho txoj kev sib raug zoo ntawm fiber thiab qhob matrix; Hauv xyoo 1963, JP Romualdi thiab GB baton luam tawm cov ntawv txheej txheem ntawm cov qhob noom steel ntawm cov pob zeb sib xyaw ntawm cov hlau hluav taws xob ntawm cov hlau ua haujlwm uas yog lub luag haujlwm zoo Hauv cov kev ntxhov siab tensile (fiber ntau qhov ncauj), yog li pib kev txhim kho theem ntawm cov khoom siv no tshiab. Txog tam sim no, nrog cov npe nrov thiab kev siv fiber prolected qhob, muaj ntau cov qhob lwm yam: muaj cov qhob noom pob zeb sib txhawb tawm, muaj cov qhob thiab txheej hybrid fiber Reinforced pob zeb.
2. Ntxiv dag zog rau kev siv cov tshuab hluav taws xob fiber ntau txhawb kev ua vaj tse
(1) Composite Cov Cuab Yeej Siv Hluav Taws Xob. Qhov kev xav ntawm composite tshuab yog raws li txoj kev xav ntawm fiber ntau composites thiab sib txuas nrog cov yam ntxwv faib ntawm cov hlau steel hauv pob zeb. Hauv cov kev tshawb xav no, cov composites raug suav tias yog ob-theem sib xyaw nrog fiber ntau li ib theem thiab matrix raws li lwm theem.
(2) fiber ntau txoj kev xav. Fiber ntau spacing theory, kuj tseem hu ua kev tawg tsis kam ntawm txoj kev xav, yog npaj raws linear pob txha me me. Qhov kev xav no uas lub zog cuam tshuam ntawm cov fibers tsuas yog cuam tshuam nrog cov fiber ntau cov fiber ntau (tsawg kawg nkaus mauv).
3. Kev txheeb xyuas ntawm kev txhim kho cov xwm txheej ntawm cov cuab yeej siv hluav taws xob fiber ntau txhawb nqa
1.Tee Fiber Comments. Cov qhob qhob steel fiber ntau yog ib hom kev sib xyaw ua ke thiab ntau yam me me ntawm cov hlau me me, stp fiber rau hauv cov pob zeb ua ke. Cov kev sib xyaw ntawm cov hlau fiber ntau yog feem ntau 1% ~ 2% los ntawm ntim, thaum 70g hlau fiber ntau yog xyaw hauv txhua cubic meter ntawm qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov qhob los ntawm cov pob zeb. Qhov ntev ntawm steel fiber yuav tsum yog 25 ~ 60 hli yuav tsum yog 0.25mm, nws tsis tuaj yeem txhim kho lub taub hau xwb, shear, khoov , hnav thiab tawg tawm tsam, tab sis kuj tseem txhim kho cov pob zeb ua kom nruj thiab ua kom muaj zog ntawm cov qauv, tshwj xeeb tshaj yog cov tawv muaj zog tuaj yeem nce los ntawm 10 ~ 20 zaug. Cov khoom siv me me ntawm cov qhob hlau fiber ntau txhawb kev ua vaj tse thiab cov qhob ua tau zoo sib piv hauv Suav teb. Thaum cov ntsiab lus ntawm steel fiber yog 15% ~ 20% thiab cov dej xis zoo nce los ntawm 120%, qhov cuam tshuam zoo nce los ntawm 10 ~ 20 Lub sijhawm, qhov kev cuam tshuam kev qaug zog los ntawm 15 ~ 20 zaug, FLEXTURAL SHOFTNESS nce los ntawm 14 ~ 20 zaug, thiab cov hnav tsis kam txhim kho. Yog li ntawd, steel fiber ntau txhawb qhob ua ke muaj cov khoom siv tshuab hluav taws xob zoo dua li cov pob zeb ua kom zoo dua.
4. Hybrid Fiber Ntau
Cov ntaub ntawv tshawb fawb muaj feem tshwm sim hais tias steel fiber tsis txhawb nqa lub tshuab ua kom muaj zog ntawm cov pob zeb hauv av. Piv nrog rau cov pob zeb ua kom zoo, muaj qhov zoo thiab txo qis thiab cov kev cuam tshuam los ntawm kev siv pob zeb ua haujlwm thiab kev tiv thaiv cov yas ntawm cov yas ua pob zeb ua. Tsis tas li ntawd, kev siv fiber ntau fiberfled qhob ib co teeb meem, xws li nqi ntau, xeb thiab yuav cuam tshuam nws daim ntawv thov rau kev sib txawv. Nyob rau hauv xyoo tsis ntev los no, qee cov kws tshawb fawb nyob hauv tsev thiab cov neeg ua haujlwm sib txawv thiab ua si sib txawv, thiab muab kev sib txawv, thiab muab cov txiaj ntsig "zoo ntawm qib thiab Chaw thau theem los txhim kho ntau yam khoom ntawm cov pob zeb ua kom tau, thiaj li ua tau raws li cov kev xav tau ntawm cov haujlwm sib txawv. Txawm li cas los xij, hais txog nws ntau yam khoom siv, tshwj xeeb tshaj yog cov kev ua kom zoo nkauj thiab kev ua kom zoo nkauj thiab sib xyaw ua ke ntawm fiber ntau, kev sib raug zoo Nruab nrab ntawm cov khoom siv ntawm cov khoom siv sib xyaw, ntxiv dag zog thiab ntxiv dag zog, tiv thaiv kev siv tshuab, cov teeb meem ntawm kev sib tov yuav raug tsim qauv yuav tsum tau txuas ntxiv Kawm.
5. Fawm kib tua fiber ntau txhawb kev ua vaj tse
Monolithic fiber ntau txhawb cov pob zeb tsis yooj yim los sib tov tusyees, cov fiber ntau yog cov loj, uas cuam tshuam rau nws cov ntawv thov dav. Los ntawm ntau cov kev tshawb fawb txog kev tshawb fawb thiab theoretical kev tshawb fawb, txheej tshiab ntawm cov hlau fiber ntau, txheej txheem hlau fiber ntau ntxiv Ib qho me me ntawm cov hlau fiber ntau yog tusyees faib rau ntawm cov chaw sab saud thiab qis dua ntawm txoj kev slab, thiab nruab nrab yog tseem muaj pob zeb ua kom nruj. Cov txheej txheem hlau nyob hauv LSFRC feem ntau muab faib rau manually lossis mechanically. Cov hlau fiber ntau yog ntev, thiab qhov ntev diamer piv feem ntau yog feem ntau ntawm 70, ua rau muaj kev faib khoom ob sab. Yog tias tsis cuam tshuam rau cov neeg kho tshuab, cov khoom siv no tsis tsuas yog txo cov nqi ntawm fiber ntau, tab sis kuj tseem yuav zam cov fiber ntau ntawm kev sib xyaw ua ke ntawm cov pob zeb sib xyaw ua ke. Tsis tas li ntawd, txoj haujlwm ntawm cov txheej txheem hluav taws xob steel fiber hauv cov pob zeb muaj qhov cuam tshuam zoo rau lub zog ntawm cov pob zeb yooj yim. Qhov cuam tshuam ntawm cov txheej txheem hluav taws xob txheej txheem hlau fiber nyob rau hauv qab ntawm cov qhob yog qhov zoo tshaj plaws. Nrog rau txoj haujlwm ntawm cov txheej txheem hluav taws xob fiber nce, qhov kev cuam tshuam ntawm cov txiaj ntsig tau qis zuj zus. Lub zog ntawm LSFRC yog ntau tshaj li 35% siab dua li cov kev sib xyaw ua ntu zus nrog qhov sib xyaw ua ke me ntsis Txawm li cas los xij, LSFRC tuaj yeem txuag tau nyiaj ntau ntau, thiab tsis muaj teeb meem ntawm kev sib xyaw nyuaj. Yog li, lsfrc yog cov khoom siv tshiab nrog cov txiaj ntsig zoo thiab kev siv nyiaj txiag thiab dav kev cia siab thiab thov hauv kev tsim kho.
6. FEMATEDED HYBRID Fiber Ntau
Txheej hybrid fiber proferced qhob (LHFRC) yog cov khoom siv sib xyaw ua ke nrog cov kab mob siab thiab luv luv ntawm lub zog ntawm LSFRile thiab luv luv elongation thiab siab kawg elongation nyob rau hauv lub sauv thiab qis dua hlau Fiber ntau pob zeb ua thiab cov pob zeb ua dawb hauv nruab nrab txheej. Nws tuaj yeem kov yeej txoj kev qaug zog ntawm LSFRC Nruab Nrab Cov Txheej Txheem Plawv thiab cov phom sij kev nyab xeeb tom qab cov steel hlau hnav tawm. LHFRC tuaj yeem txhim kho lub zog ntawm cov qhob. Piv nrog cov pob zeb ua kom zoo dua qub, nws lub zog yooj yim yog nce ntxiv los ntawm 2.6%, tab sis nws muaj cov nyhuv siv tau me me ntawm cov khoom siv hloov ntawm pob zeb. Lub Flexural Elastic Modulus of LHFRC yog 1.3% siab dua li cov pob zeb ua dawb thiab 0.3% qis dua li LSFRC. LHFRC tseem tuaj yeem txhim kho qhov yooj yim flexural ntawm cov pob zeb ua, thiab nws cov ntsuas kev ua tiav Flexural yog li 8 zaug ntawm pob zeb ua dawb thiab 1.3 npaug ntawm LSFRC. Ntxiv mus, vim muaj kev ua tiav sib txawv ntawm ob lossis ntau cov fibers hauv pob zeb ua tau zoo, raws li kev siv pob zeb ua tau zoo, raws li lub zog, nruj, tawg lub zog , FLEXTAL lub zog thiab tensile lub zog ntawm cov khoom, txhim kho cov khoom zoo thiab ntev kev pabcuam lub neej ntawm cov khoom siv.
- Caanxi architecture, vol. 38, Tsis muaj 11, Chen Huiqing)
Lub Sijhawm Post: Lub Yim Hli 24-2022