Cov cawv ntawm cov fiberglass ntawm lub yaig tsis kam ua cov pob zeb ua kom zoo dua (ua los ntawm cov ntsiab lus sib ceg) yog ib lub ncauj lus ntawm cov paj thiab kev tsim kho pej xeem. Thaum siv cov qhob noom cookie muaj cov txiaj ntsig ib puag ncig thiab cov peev txheej-cov khoom siv kho dua tshiab thiab durability ristarance) feem ntau tsis tshua muaj zog rau cov sib txuas ua ke. Fiberglass, raws li aTxhawb nqa cov khoom siv, tuaj yeem txhim kho kev ua tau zoo ntawm cov qhob ua ke los ntawm kev siv lub cev thiab tshuaj lom neeg. Ntawm no yog cov ncauj lus kom ntxaws:
1. Cov khoom thiab cov haujlwm ntawmIav yas
Fiberglass, ib qho khoom siv tsis yog xim hlau, ua kom pom cov cwj pwm hauv qab no:
High tensile lub zog: them nyiaj rau qhov muaj peev xwm qes ntawm cov pob zeb.
Corrosion Kuj: Ua kom cov tshuaj tua kab mob (piv txwv li, chloride ions, sulfates).
Kev ua kom tawv nqaij thiab tawg tawm **: Txuas hniav microcracks kom ncua kev hais tawm thiab txo cov permeability.
2. Durability shortcomings ntawm rov ua dua
Siv rov qab nrog cov ntxig ntxeem tau muab tso rau ntawm lawv cov chaw ua rau:
Cov chaw sib hloov tsis muaj zog (ITZ): Kev sib txuas lus tsis zoo ntawm cov khoom siv ua haujlwm thiab cov cement tshiab muab tshuaj ntsuab, tsim kom muaj txoj hauv kev.
Tsawg impermortobility: erosive cov neeg sawv cev (piv txwv li, clr,, so₄²⁻) nkag mus yooj yim, ua rau steel corrosion lossis expansive puas tsuaj.
Txom nyem tsis khov-thaw kuj: cov dej khov nthuav dav hauv cov hws ua rau ua rau tawg thiab txhaws.
3. Mechanism ntawm fiberglass hauv kev txhim kho yaig tsis kam
(1) Kev cuam tshuam lub cev lub cev
Qaum inibition: uniformly dispersed cibers fibers Choj microcracks, thaiv lawv txoj kev loj hlob thiab txo txoj kev rau cov neeg sawv cev uas tab tom ua haujlwm.
Kev Txhim Kho Kev Txhim Kho: Fibers sau pores, txo cov porosity thiab qeeb lub diffusion ntawm cov tshuaj tsis muaj kuab.
(2) Tshuaj Muaj Zog
Alkali-resistant fiberglass(piv txwv li, ar-iav): cov lus sib txawv ntawm cov pob zeb nyob ruaj khov nyob rau ib puag ncig high-alkali, zam kev ua tsis taus.
Interforface Qhov Cuab Lub Zog: Matrip-Matrix bonding me ntsis kev tsis xws hauv ITZ, txo cov kev phom sij hauv zos.
(3) tsis kam rau hom kev yaig tshwj xeeb
Chloride ion tsis kam: txo kev nruam kev tsim kom qeeb cl⁻penetration, ncua steel corrosion.
Sulfate tawm tsam tiv thaiv: suppressed kuas tawg kev loj hlob mitigates kev puas tsuaj los ntawm sulfate crystallization thiab nthuav dav.
Freeze-Thaw Durability: fiber hloov kev ntxhov siab los ntawm kev tsim cov dej khov, txo cov nplaim hluav taws xob.
4. TSEEM CEEB TSHEEJ
Fiber ntau Dosage: Zoo tshaj plaws yog 0.5% -2% (los ntawm ntim); Tshaj cov poj niam ua rau pawg thiab txo kev sib cog lus.
Fiber ntau thiab dispersion: ntev fibers (12-24 mm) txhim kho kev ua kom nruj tab sis yuav tsum tau faib tawm cov kev faib khoom sib txawv.
Zoo ntawm cov rov ua haujlwm ua kom yuam kev: cov dej nqus dej siab lossis cov ntsiab lus ntawm cov khoom siv tshuaj khib nyiab tsis muaj zog muaj fiber ntau.
5. Kev tshawb nrhiav pom thiab cov lus xaus
Cov teebmeem zoo: Kev tshawb fawb feem ntau qhia tau tias tsim nyogiav yasNtxiv rau qhov tseem ceeb heev customeabability, chloride tsis kam, thiab sulfate tsis kam. Piv txwv li, 1% fiberglass tuaj yeem txo chloride diffusion coefficients los ntawm 20% -30%.
Kev ua tau ntev ntev: durability ntawm cov fibers nyob rau hauv alkaline ib puag ncig yuav tsum muaj kev saib xyuas. Alkali-resistant txheej lossis hybrid fibers (piv txwv li, nrog polypropylene) txhim kho kev txom nyem.
Cov kev txwv: tsis zoo ua tau zoo siv ua ke (piv txwv li, siab ntsws porosity, impurities) yuav tsis muaj fiber ntau cov txiaj ntsig.
6. Cov lus thov cov lus pom zoo
Cov xwm txheej tsim nyog: cov av nkos ib puag ncig, cov av qab ntsev, lossis cov qauv yuav tsum muaj ua kom muaj zog ua kom zoo dua qub.
Sib tov kev ua kom zoo: Kuaj cov tshuaj fiber ntau, siv rov ua yuam kev hloov sib piv, thiab cov syergies nrog adduitives (piv txwv li, silica fume).
Tswjhwm zoo: kom ntseeg tau tias niaj hnub ua kom tsis txhob muaj clumping thaum sib tov.
Lub ntsiab
Fiberglass txhim kho cov yaig tsis kam ua cov pob zeb ua kom zoo dua los ntawm kev ua kom muaj lub cev ua kom nruj thiab tshuaj coj ua ke. Nws cov txiaj ntsig zoo nyob ntawm kev ntaus fiber ntau, noj, thiab rov ua dua qub zoo. Kev tshawb fawb yav tom ntej yuav tsum tsom mus rau cov qauv siv ruaj khov thiab cov nqi tsim kho tau zoo los pab txhawb kev siv hluav taws xob loj loj.
Lub Sijhawm Post: Feb-28-2025
