Kev cuam tshuam ntawm fiberglass ntawm kev yaig tsis kam ntawm cov pob zeb siv rov ua dua tshiab (ua los ntawm cov khoom siv rov ua dua tshiab) yog lub ntsiab lus tseem ceeb hauv cov ntaub ntawv science thiab engineering engineering. Thaum cov pob zeb ua dua tshiab muaj cov txiaj ntsig zoo ib puag ncig thiab cov khoom siv rov ua dua tshiab, nws cov khoom siv kho tshuab thiab kev ua haujlwm ntev (xws li kev yaig tsis kam) feem ntau qis dua rau cov pob zeb ua ke. Fiberglass, as acov khoom siv reinforcing, tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov pob zeb ua dua tshiab los ntawm kev siv lub cev thiab tshuaj. Nov yog ib qho kev ntsuam xyuas ntxaws:
1. Khoom thiab Kev Ua Haujlwm ntawmFiberglass
Fiberglass, ib yam khoom uas tsis yog-metallic, nthuav tawm cov yam ntxwv hauv qab no:
Lub zog tensile siab: Kev them nyiaj rau qhov muaj peev xwm tensile tsawg ntawm pob zeb.
Corrosion resistance: Resistant tshuaj tua kab mob (xws li chloride ions, sulfates).
Toughening thiab crack resistance **: Txuas microcracks kom ncua kev tawg tawm thiab txo cov permeability.
2. Durability Shortcomings ntawm Recycled Concrete
Recycled aggregates nrog porous residual cement paste rau ntawm lawv qhov chaw ua rau:
Tsis muaj zog interfacial hloov chaw (ITZ): Kev sib txuas tsis zoo ntawm cov khoom siv rov ua dua tshiab thiab cov cement tshiab, tsim txoj hauv kev permeable.
Tsawg impermeability: Erosive agents (piv txwv li, Cl⁻, SO₄²⁻) nkag tau yooj yim, ua rau steel corrosion los yog expansive puas.
Tsis zoo khov-thaw tsis kam: Ice expansion hauv pores induces cracking thiab spalling.
3. Mechanisms ntawm Fiberglass hauv kev txhim kho Erosion Resistance
(1) Kev cuam tshuam lub cev
Crack inhibition: Uniformly dispersed fibers choj microcracks, thaiv lawv txoj kev loj hlob thiab txo txoj hauv kev rau erosive agents.
Enhanced compactness: Fibers sau pores, txo porosity thiab slowing lub diffusion ntawm teeb meem tshuaj.
(2) Tshuaj Stability
Alkali-resistant fiberglass(piv txwv li, AR-iav): Cov fibers kho qhov chaw nyob ruaj khov nyob rau hauv high-alkali ib puag ncig, tsis txhob degradation.
Interface reinforcement: Strong fiber-matrix bonding minimizes defects in ITZ, txo cov kev pheej hmoo yaig hauv zos.
(3) Resistance rau tej yam Erosion hom
Chloride ion kuj: Txo qhov tawg tsim qeeb qeeb Cl⁻ nkag mus, ncua kev xeb hlau.
Sulfate nres tsis kam: Ncua kev loj hlob tawg mitigates kev puas tsuaj los ntawm sulfate crystallization thiab nthuav dav.
Freeze-thaw durability: Fiber saj zawg zog absorbs kev ntxhov siab los ntawm cov dej khov tsim, txo qhov chaw spalling.
4. Yam tseem ceeb cuam tshuam
Fiber ntau npaum li cas: Qhov zoo tshaj plaws yog 0.5% -2% (los ntawm ntim); Cov fibers ntau dhau ua rau pawg thiab txo qis compactness.
Fiber ntev thiab dispersion: ntev fibers (12-24 mm) txhim kho toughening tab sis yuav tsum tau sib faib.
Kev ua tau zoo ntawm cov khoom siv rov ua dua: Kev nqus dej siab lossis cov ntsiab lus mortar residual tsis muaj zog fiber-matrix bonding.
5. Kev Tshawb Fawb Txog Kev Tshawb Fawb thiab Cov Lus Pom Zoo
Cov teebmeem zoo: Feem ntau cov kev tshawb fawb qhia tias tsim nyogfiberglassNtxiv nrog rau kev txhim kho impermeability, chloride kuj, thiab sulfate kuj. Piv txwv li, 1% fiberglass tuaj yeem txo cov chloride diffusion coefficients los ntawm 20% -30%.
Kev ua haujlwm ntev: Kev ua haujlwm ntev ntawm fibers hauv alkaline ib puag ncig yuav tsum tau saib xyuas. Alkali-resistant coatings los yog hybrid fibers (xws li, nrog polypropylene) txhim khu lub neej ntev.
Cov kev txwv: Cov khoom siv tsis zoo rov ua dua tshiab (piv txwv li, porosity siab, impurities) tuaj yeem txo cov txiaj ntsig fiber ntau.
6. Cov lus pom zoo rau daim ntawv thov
Tsim nyog scenarios: Marine ib puag ncig, saline xau, los yog cov qauv uas yuav tsum tau high-durability recycled qhob.
Kev sib xyaw ua kom zoo: Kev ntsuas fiber ntau, rov ua dua qhov sib piv hloov pauv, thiab kev sib koom ua ke nrog cov khoom ntxiv (xws li, silica fume).
Kev Tswjhwm Zoo: Ua kom muaj fiber ntau dispersion kom tsis txhob clumping thaum sib tov.
Cov ntsiab lus
Fiberglass txhim khu kev yaig tsis kam ntawm cov pob zeb rov ua dua los ntawm lub cev toughening thiab tshuaj stabilization. Nws txoj kev ua tau zoo nyob ntawm hom fiber ntau, ntau npaum li cas, thiab cov khoom siv rov ua dua tshiab. Kev tshawb fawb yav tom ntej yuav tsum tsom mus rau kev ua haujlwm ntev ntev thiab kev tsim cov nqi tsim nyog los pab txhawb cov kev siv engineering loj.
Post lub sij hawm: Feb-28-2025
