Txheej txheem cej luam ntawm Basalt Fiber-Reinforced Plaster Mortar

1. Cov yam ntxwv ntawm Basalt Fiber

Basalt fiber ntauFeem ntau yog tsim los ntawm silicon oxide, aluminium oxide, thiab hlau oxide, nrog rau qib siab ntawm silicon oxide thiab aluminium oxide, muab nws qhov tseem ceeb hauv kev tiv thaiv tshav kub thiab Tshuaj corrosion kuj. Piv nrog rau iav fiber ntau, basalt fiber tsis muaj teeb meem hlau oxides, ua rau muaj kev ruaj ntseg tshuaj zoo dua thiab zoo heev nyob rau hauv corrosive ib puag ncig zoo li muaj zog alkalis thiab muaj zog acids.

Lub zog tensile ntawm basalt fiber feem ntau yog li ntawm 3000 txog 4800 MPa, thiab nws cov elastic modulus nyob rau hauv thaj tsam ntawm 80 mus rau 110 GPa. Qhov no ua rau nws muaj zog dua iav fiber ntau, nrog rau qis elongation ntawm kev tawg, uas ua kom zoo dua qhov tawg tsis kam ntawm cov khoom siv cement.

Basalt fiber muaj qhov ua tau zoo heev ntawm qhov kub thiab txias, nrog lub melting point tshaj 1400 ° C thiab lub sij hawm ntev kev pab cuam kub txog li 700 ° C, deb tshaj ntawm cov iav fiber ntau. Qhov no tso cai rau nws kom muaj lub cev ruaj khov txawm tias nyob hauv qhov chaw kub kub.

Basalt fiber kuj muaj superior alkali tsis kam, acid kuj, thiab UV kuj. Nws tuaj yeem tswj tau lub neej ntev hauv qhov chaw hnyav xws li cov av noo, tshuaj tsuag ntsev, thiab tshuaj tiv thaiv corrosion, ua rau nws tshwj xeeb tshaj yog tsim rau cov khoom siv engineering xws li cov phab ntsa sab nrauv plaster txheej uas raug rau cov cheeb tsam nyuaj rau lub sijhawm ntev.

2. Txhaum tsis kam Mechanism ntawm Fiber-Reinforced Mortar

Qhov kev txhawb zog ntawm cov fibers hauv mortar feem ntau yog nyob ntawm lawv qhov chaw faib khoom, qhov ntev, cov ntsiab lus, thiab kev sib koom ua ke nrog cov khoom siv cement. Thaum lub sij hawm hardening txheej txheem ntawm mortar, micro-cracks tau yooj yim tsim nyob rau hauv vim muaj tej yam xws li ntim shrinkage los ntawm hydration tshua thiab thermal stress los ntawm kub hloov.

Fibers tuaj yeem txuas ob sab ntawm micro-cracks, muab cov txiaj ntsig txuas ntxiv thaum cov kab nrib pleb pib tsim, ua kom cov tawg tawg tau zoo thiab txhim kho cov khoom siv tag nrho tensile thiab tawg tsis kam. Basalt fiber ntau muaj ib tug ntxhib nto, uas muab lub cev muaj zog interlocking nrog cov cement paste. Thaum cov khoom siv sab nraud raug siv rau hauv mortar, ib feem ntawm qhov kev ntxhov siab tuaj yeem raug xa mus los ntawm cov fibers mus rau ib puag ncig matrix, yog li txo qhov kev ntxhov siab hauv cheeb tsam thiab tiv thaiv kev tawg ntxiv. Qhov kev ntxhov siab dispersion mechanism pab txhim kho tag nrho cov toughness thiab cuam tshuam tsis kam ntawm cov tshuaj khib.

Thaum lub sij hawm mortar hardening txheej txheem, fibers tuaj yeem tsim ib qho randomly faib Txhim kho Mesh qauv nyob rau hauv lub matrix, txhim kho lub mortar lub deformation kuj. Thaum cov txheej plaster raug hloov mus rau sab nraud qhov kub thiab txias, qhuav shrinkage stresses, los yog mechanical loads, qhov no reinforcing mesh tuaj yeem tiv taus deformation nyob rau hauv cov cheeb tsam kev ntxhov siab, ua rau muaj kev sib tsoo ntau dua hauv cov khoom.