Yuav ua li cas Fibers tiv thaiv pob zeb tawg

Qhob muaj lub zog compressive siab heev, tab sis kuj ceeb tias, nws kuj yog qhov ua rau tawg. Qhov tseeb, kev tshawb fawb qhia tias ntau dua 80% ntawm cov pob zeb tawg tau tshwm sim nyob rau theem kho thaum ntxov. Qee qhov zoo- cov qauv tsim tau raug pom kom tawg yooj yim vim qhov tsis txaus shrinkage thiab tswj kev ntxhov siab. Qhov kev daws teeb meem yog dab tsi? Fiber reinforcement.

Txawm hais tias nws yog polypropylene fibers, steel fibers, los yog hluavtaws fibers, fibers tau nce siv nyob rau hauv niaj hnub pob zeb los txhim kho cov kab nrib pleb, durability, thiab ntev - kev ua tau zoo. Cov ntaub ntawv me me no tau muab faib thoob plaws hauv lub pob zeb matrix, pab tswj kev tawg tawg thiab faib kev ntxhov siab ntau tus sib npaug. Hauv phau ntawv qhia no, peb yuav tshawb xyuas seb cov fibers tiv thaiv cov pob zeb tawg li cas thiab vim li cas lawv thiaj dhau los ua qhov tseem ceeb hauv cov ntawv thov precast thiab cov qauv.

Cov kab nrib pleb no feem ntau tshwm sim thaum lub sijhawm kho thaum ntxov. Thaum cov pob zeb tshiab tshiab poob dej noo sai heev- feem ntau vim qhov kub thiab txias, cua txias, lossis cov av noo tsawg- qhov chaw pib ntsws ua ntej cov pob zeb tsim muaj zog txaus. Qhov kev poob dej sai sai no tuaj yeem ua rau cov kab nrib pleb uas tuaj yeem tsim nyob rau hauv ob peb teev tom qab cov pob zeb tso.

Cov no feem ntau tshwm sim nyob rau theem tom ntej raws li cov pob zeb tawv tawv maj mam poob hauv cov dej hauv lub sijhawm. Raws li dej evaporates los ntawm cov cement matrix, qhov ntim ntawm cov pob zeb me ntsis txo. Yog hais tias lub pob zeb yog txwv tsis pub los ntawm kev txhawb nqa tuav, kev sib txhuam nrog cov subgrade, los yog cov txheej txheem uas nyob ib sab, cov kev ntxhov siab sab hauv tuaj yeem tsim, thiab cov kab nrib pleb pib tsim.

Thermal cracking yog tshwm sim los ntawm qhov sib txawv ntawm qhov kub thiab txias hauv cov pob zeb loj. Thaum lub sij hawm hydration txheej txheem, cement generates tshav kub. Thaum lub sab hauv ntawm cov pob zeb tseem sov thaum lub txheej txheej txias, qhov tshwm sim ntawm qhov kub thiab txias tuaj yeem tsim kev ntxhov siab sab hauv uas ua rau tawg.

Tsis tas li ntawd, ib puag ncig tej yam xws li kub hloov pauv, cua raug, thiab av noo theem tuaj yeem ua kom cov txheej txheem no. Ua ke, cov xwm txheej no piav qhia tias vim li cas kev tswj kev tawg yog qhov kev txhawj xeeb tseem ceeb hauv kev tsim cov pob zeb niaj hnub no thiab vim li cas txoj kev siv zog ntxiv nrog rau kev siv fiber ntau, tau siv dav los txhim kho pob zeb ua kom ntev.

PP fiber

Polypropylene Fiber (PP Fibers)

PAN Fiber

Polyacrylonitrile Fiber (PAN Fiber)

Polyvinyl cawv Fiber (PVA Fiber)

Polyester Fiber (PET fiber ntau)

Cellulose Fibers

Basalt Fiber ntau

Steel fibers for concrete

Hlau Fibers rau pob zeb

Imitation Steel Fiber

Imitation Steel Fiber ntau

Polypropylene Twisted Fiber ntau

Fiber-reinforced concrete (FRC) yog hais txog cov pob zeb uas ua kom cov fibers dispersed tau ntxiv rau cov pob zeb sib xyaw kom txhim kho nws cov khoom siv kho tshuab. Cov pob zeb ib txwm muaj lub zog siab compressive tab sis kuj tsis tshua muaj zog tensile, ua rau nws yooj yim rau tawg hauv kev ntxhov siab lossis shrinkage. Los ntawm kev ntxiv cov fibers rau kev sib xyaw, qhov toughness, tawg tsis kam, thiab cov qauv kev ncaj ncees ntawm cov pob zeb tuaj yeem txhim kho. FRC tsis tsuas yog tso siab rau cov tuav loj loj tab sis ntxiv dag zog rau cov khoom siv los ntawm sab hauv, ua rau nws muaj kev ntseeg siab dua hauv kev tsim kho tiag tiag.

Thaum lub sij hawm sib tov, fibers yog ntxiv ncaj qha mus rau lub pob zeb thiab sib npaug faib thoob plaws hauv cov khoom. Tom qab cov pob zeb hardens, cov fibers tseem nyob rau hauv lub matrix, tsim ib tug network qauv uas txhim khu kev tawg kuj thiab txhim kho tag nrho durability. Qhov kev sib xyaw ua ke no ua rau fiber ntau - cov pob zeb ua kom ruaj khov dua nyob rau hauv ib puag ncig kev ntxhov siab thiab cov khoom siv tshuab.

Thaum cov fibers sib xyaw rau hauv cov qhob tshiab, lawv tawg mus thoob plaws tag nrho cov khoom. Tsis zoo li kev siv dag zog ib txwm ua haujlwm ntawm qhov chaw tshwj xeeb, fibers muab kev txhawb nqa hauv txhua qhov kev qhia. Cov ntsiab lus me me no ua haujlwm zoo li kev txhawb nqa sab hauv, ntxiv dag zog rau lub pob zeb matrix thiab txhim kho nws txoj kev tiv thaiv kev ntxhov siab thiab kev hloov pauv.

Kev tawg feem ntau pib ntawm qib microscopic. Fibers ua haujlwm los ntawm kev txuas cov micro- tawg sai li sai tau thaum lawv tshwm. Es tsis txhob cia cov kab nrib pleb qhib thiab nthuav tawm, fibers tuav cov pob zeb ua ke, txo qhov tawg qhov dav thiab ua kom qeeb ntxiv kev txhim kho tawg. Qhov kev tswj xyuas thaum ntxov no ua rau muaj txiaj ntsig zoo dua qub ntawm cov qauv.

Fibers pab faib cov kev ntxhov siab sab hauv kom sib npaug thoob plaws hauv cov pob zeb. Thaum shrinkage, kub hloov, los yog lwm yam loads tshwm sim, fibers txo lub zos kev nyuaj siab concentration. Qhov no ua rau muaj kev sib npaug ntau dua uas tsis tshua muaj peev xwm tsim kev tawg hauv cheeb tsam.

Thaum lub sijhawm kho thaum ntxov, cov dej tsis tuaj yeem ua rau cov yas shrinkage tawg. Fibers txwv qhov kev txav no los ntawm kev txwv cov pob zeb nto thiab tswj kev sib koom ua ke hauv kev sib xyaw. Qhov no yuav pab khaws cia qhov kev ncaj ncees ntawm qhov chaw ua ntej lub pob zeb ua kom tawv tawv.

Fiber-cov pob zeb ua kom muaj zog ntau dua li cov khoom sib xyaw. Nws ua nruj dua, cuam tshuam ntau dua- tiv taus, thiab muaj peev xwm tiv taus tensile zog. Es tsis txhob nkig tawg, fiber ntau -cov pob zeb ua kom muaj zog ntxiv tau yooj yim dua thiab txhim kho ntev - lub sij hawm tawg tsis kam.

Hom Fiber	Khoom siv & yam ntxwv	Cov txiaj ntsig tseem ceeb	Tej kev siv
Polypropylene Fibers	Synthetic polymer fibers nrog zoo yoog raws thiab tshuaj tiv thaiv	Tswj cov yas shrinkage cracking, txhim kho durability	Slabs, pavements, precast qhob, vaj tse nyob
Hlau Fibers	Siab -lub zog steel fibers nrog muaj zog load-cov kabmob muaj peev xwm	Txhim kho toughness, cuam tshuam tsis kam, thiab muaj peev xwm thauj khoom	Kev lag luam hauv tsev, tunnels, choj decks, hnyav -cov dej num ua vaj tse
Cov iav Fibers	Alkali-resistant iav fibers tsim los rau kev txhim kho pob zeb	Txhim kho kev tawg tsis kam thiab nto durability	Architectural panels, façade ntsiab, hniav pob zeb
Polyvinyl cawv Fiber (PVA)	Siab -kev ua tau zoo hluavtaws fiber ntau nrog kev sib txuas zoo rau cov cement matrix	Zoo heev crack tswj thiab ductility	High -kev ua tau zoo pob zeb, kho mortars, engineered cementitious composites
Basalt Fiber ntau	Fibers ua los ntawm ntuj volcanic basalt pob zeb sourced cov ntaub ntawv	Kub kub kuj thiab corrosion kuj	Infrastructure, marine structures, thiab cov haujlwm ua vaj tse ruaj khov
Imitation Steel Fiber ntau	Synthetic macro fibers tsim los simulate steel fiber ntau	Lub teeb yuag, corrosion-resistant lwm txoj rau steel fiber	Muaj cov plag tsev, precast ntsiab, loj slabs

Applications of Fiber-Reinforced Concrete

Precast Concrete Khoom thiab Panels

Fiber-cov pob zeb muaj zog yog siv dav hauv kev tsim cov khoom siv precast vim nws txhim kho kev tawg thiab txhim kho cov qauv kev ntseeg siab thaum thauj thiab teeb tsa. Precast vaj huam sib luag, kav dej, thiab cov khoom vaj tsev feem ntau ntsib kev nyuaj siab ua ntej mus txog qhov chaw tsim kho. Fibers pab faib cov kev ntxhov siab no thoob plaws hauv lub pob zeb matrix, txo qhov kev pheej hmoo ntawm kev tawg thaum ntxov.

Kev lag luam hauv pem teb yuav tsum tiv taus cov khoom hnyav los ntawm cov tshuab, forklifts, thiab kev khiav tsheb tsis tu ncua. Fiber reinforcement pab tswj shrinkage tawg uas feem ntau tshwm sim nyob rau hauv loj slab cheeb tsam. Los ntawm kev txhim kho tensile lub zog thiab cuam tshuam tsis kam, fibers ua cov pob zeb hauv pem teb ntau tiv taus hnav thiab qaug zog.

Cov ntawv thov Shotcrete feem ntau cuam tshuam nrog qhov chaw nyuaj thiab nyuaj rau kev tsim kho. Fiber-cov pob zeb ua kom muaj zog txhim kho kev sib koom ua ke thaum lub sijhawm txau thiab txhim kho cov txheej txheem toughness ntawm cov txheej txheem tiav.

Cov pob zeb siv hauv cov choj thiab cov pavements feem ntau raug rau cov tsheb thauj khoom, qhov kub thiab txias hloov pauv, thiab ib puag ncig. Fiber reinforcement pab txwv kev tawg tawm thiab txhim kho kev qaug zog, uas txuas ntxiv kev pab cuam lub neej thiab txo cov kev tu ncua.

Hauv cov haujlwm hauv vaj tse thiab kev lag luam, fiber ntau- cov pob zeb siv dag zog feem ntau yog siv rau hauv kev tsav tsheb, hauv paus, kev taug kev, thiab hauv pem teb slabs. Fibers muab kev tswj kom tawg ntxiv thaum kho thiab kev pabcuam, pab tswj kom ntev - lub sij hawm kev ntseeg tau ntawm cov qauv thiab qhov zoo li.

Thaum lub pob zeb tawg yog ib txwm muaj, nws tsis yog qhov kev zam. Fiber reinforcement yog ib qho kev siv tau thiab siv tau zoo ntawm kev tswj cov shrinkage, dispersing kev ntxhov siab nyob rau hauv, thiab ntxiv dag zog rau lub pob zeb matrix. Los ntawm kev sib xyaw cov fibers rau hauv cov pob zeb sib xyaw, cov neeg tsim khoom tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg thiab txhim kho cov kav ntev hauv ntau yam kev siv, los ntawm cov khoom siv precast mus rau cov plag tsev. Raws li kev tsim kho kev lag luam xav tau cov khoom siv nrog lub zog siab dua thiab kev pab cuam lub neej txuas ntxiv zuj zus, fiber ntau - cov pob zeb ua kom muaj zog tau dhau los ua kev daws teeb meem rau kev ua haujlwm niaj hnub.

Q: Dab tsi ntawm fibers feem ntau siv los tiv thaiv pob zeb tawg?

A: Cov fibers feem ntau siv hauv pob zeb muaj xws li polypropylene fibers, steel fibers, iav fibers, thiab hluavtaws macro fibers. Polypropylene fibers tau dav siv los tswj cov yas shrinkage tawg thaum lub sij hawm kho thaum ntxov, thaum steel fibers txhim kho cov qauv toughness thiab load-cov kabmob muaj peev xwm. Synthetic fibers feem ntau yog siv nyob rau hauv industrial floors thiab precast Cheebtsam vim hais tias cov ntawv thov yuav tsum tau ntau dua durability thiab zoo tswj kev tawg.

Q: Cov fibers puas tuaj yeem tshem tawm cov kab nrib pleb hauv pob zeb?

A: Fibers tsis tuaj yeem tshem tawm cov kab nrib pleb, tab sis lawv tuaj yeem txo qhov loj thiab sib kis ntawm cov kab nrib pleb. Los ntawm bridging micro- tawg nyob rau hauv lub pob zeb matrix, fibers pab tswj kev txhim kho tawg thiab tiv thaiv cov kab nrib pleb me me los ntawm kev nthuav mus rau cov teeb meem loj dua.

Q: Cov fibers puas tuaj yeem hloov cov khoom siv dag zog?

A: Hauv qee qhov kev siv, tshwj xeeb tshaj yog cov slabs thiab cov plag tsev, hluavtaws macro fibers tuaj yeem hloov cov khoom siv dag zog. Txawm li cas los xij, hauv cov khoom siv xws li kab teeb lossis kab, cov fibers feem ntau yog siv ua ke nrog cov pa rebar los txhim kho kev tswj kev tawg thiab tag nrho cov toughness.

Q: Yuav ua li cas fibers ntxiv rau pob zeb?

A: Fibers feem ntau yog ntxiv ncaj qha thaum lub sij hawm ua vaj tse pob zeb los yog cov txheej txheem sib tov. Kev sib xyaw kom zoo ua kom cov fibers sib npaug sib npaug thoob plaws hauv cov pob zeb, tso cai rau lawv ua haujlwm zoo li kev txhawb nqa sab hauv.

Q: Puas yog fibers cuam tshuam lub zog ntawm pob zeb?

A: Fibers feem ntau txhim kho tus cwj pwm tensile, toughness, thiab tawg tsis kam ntawm pob zeb ntau dua li nws lub zog compressive. Los ntawm kev tswj cov kab nrib pleb thiab faib cov kev ntxhov siab ntau sib npaug, fiber ntau - cov pob zeb ua kom muaj zog feem ntau ua rau pom kev ua haujlwm tau zoo dua thiab ntev - lub sijhawm ua haujlwm.