Performance Optimization thiab Engineering Application Research ntawm Short-Cut Basalt Fiber-Reinforced Concrete

Nyob rau hauv xyoo tas los no,Tuam Tshoj txoj kev loj engineering Kev tsim kho tau loj hlob sai, thiab pob zeb tsim tshuab tau ua tiav qhov kev vam meej, accumulating heev heev advanced thiab paub tab technical achievements. Kev tsim qauv pob zeb tau siv dav hauv kev tsim kho vaj tse, qhia nws qhov tseem ceeb. Txawm li cas los xij, nrog rau cov kev ua tiav no, qhov teeb meem ntawm pob zeb tawg tab tom ua qhov tseem ceeb. Lub xub ntiag ntawm cov kab nrib pleb cuam tshuam kev ua haujlwm ntawm pob zeb, notably txo nws tensile zog, uas yog lub hauv paus yog vim li cas rau lub brittle tsis ua hauj lwm exhibited los ntawm pob zeb. Short-cut basalt fiber ntau, raws li cov khoom siv fiber ntau, tau dhau los ua cov khoom siv pob zeb zoo heev vim nws cov khoom siv tshwj xeeb, zoo stability, thiab tus nqi-zoo.Kab lus no yuav tsom mus rau cov yam ntxwv ntawm luv luv Basalt Fiber ntau thiab tshawb nrhiav nws cov kev siv tswv yim hauv kev ua vaj tse thiab kev txhawb zog.

2. Cov khoom ntawm Short-Cut Basalt Fiber

2.1 Kev txhais

basalt fiber ntau yog ib qho inorganic ntxhia fiber ntau uas tau ua tiav los ntawm kev txiav cov basalt fiber ntau txuas ntxiv mus rau qhov ntev feem ntau tsawg dua $50\text{mm}$. Nws tuaj yeem ua tau zoo dispersed hauv pob zeb. Raws li nws daim ntawv thov, Nws tuaj yeem raug faib ua feem ntau hauv: anti-cracking fiber ntau rau pob zeb ($\text{BF}$), toughening thiab ntxiv dag zog rau fiber ntau rau pob zeb ($\text{BZ}$), thiab anti-cracking fiber ntau rau mortar ($\text{BSF}$), ntawm lwm tus.

2.2 Kev ua haujlwm ntawm Luv-Cut Basalt Fiber

luv luv basalt fiber ntau muaj cov khoom zoo heev ntawm siab zog thiab siab modulus. Nws lub zog tensile tuaj yeem ncav cuag $1050\text{-}1250\text{MPa}$, thiab nws cov elastic modulus tsis tsawg dua $34\text{GPa}$. Nws kub-kub kuj yog zoo heev, tso cai rau nws ua hauj lwm tsis tu ncua nyob rau hauv ib tug dav kub ntau yam ntawm —269∘C rau 650∘C. Nws nthuav tawm siab corrosion kuj thiab tshuaj stability nyob rau hauv corrosive media xws li acids, alkalis, thiab ntsev. Tshwj xeeb tshaj yog nyob rau hauv alkaline xov xwm xws li saturated alkali tov thiab cement, nws ib leeg-filament tawg lub zog tuav tus nqi ntau dua $75\%$, Ua tau zoo heev tiv thaiv alkali corrosion. Short-cut basalt fiber ntau muaj zoo compatibility nrog inorganic binders, noo noo nqus tus nqi qis dua $1\%$, thiab nws hygroscopicity tsis hloov raws sijhawm. Qhov no ua pov thawj nws cov khoom zoo stability, ntev lifespan, thiab ib puag ncig compatibility thaum siv. Tsis tas li ntawd, cov fiber ntau no kuj muaj cov yam ntxwv zoo xws li rwb thaiv tsev, high-temperature filtration, hluav taws xob tsis kam, thiab muaj peev xwm xa cov nthwv dej. Nws cov Performance index yog qhia hauv Table 1.

3. Daim ntawv thov kev soj ntsuam luv luv-txiav Basalt Fiber hauv pob zeb

Short-cut basalt fiber reinforced pob zeb Yuav koom nrog qee yam ntawm kev txuas mus ntxiv lossis tsis tu ncua luv-txiav basalt fiber rau hauv cov pob zeb ua kom tsim nyog. Thaum khaws cov txiaj ntsig qub ntawm qhob lub zog compressive, txoj kev no tuaj yeem txhim kho nws qhov zoo tawv thiab tensile zog, yog li no muaj txiaj ntsig zoo ntxiv thiab ntxiv dag zog rau cov pob zeb thiab txuas ntxiv lub neej kev pabcuam ntawm cov qauv engineering.

Ntxiv rau basalt fiber ntau, carbon fiber ntau, iav fiber ntau, aramid fiber ntau, thiab lwm tus kuj tau siv los ua cov khoom siv ntxiv hauv pob zeb. Txawm li cas los xij, Kev xyaum mus sij hawm ntev qhia tau hais tias cov ntaub ntawv no nthuav tawm qee yam teeb meem thaum siv rau pob zeb, ua rau nws nyuaj ua kom tau raws li kev lag luam xav tau rau cov pob zeb ua haujlwm siab. Qhov tshwm sim ntawm luv-txiav basalt fiber ua qhov sib txawv ntawm cov ntaub ntawv thiab cov txheej txheem, zoo heev txhawb txoj kev loj hlob ntawm pob zeb ntxiv dag zog thiab cov cuab yeej siv dag zog. Nws lub luag haujlwm hauv kev txhawb nqa thiab kev txhawb zog yog qhov tseem ceeb hauv cov hauv qab no:

1. Muaj txiaj ntsig Crack Inhibition: Vim nws qhov kom muaj nuj nqis thiab thaj chaw zoo, luv-txiav basalt fiber ntau tuaj yeem tiv thaiv micro-cracks, tiv thaiv lawv txoj kev sib txuas thiab nthuav dav. Lub caij no, nws kov yeej qhov tsis zoo ntawm lwm cov hluavtaws fibers, xws li tsawg ntom, tsis tshua muaj zog tensile, thiab qis elastic modulus. Nws tsis yooj yim rub tawm thaum lub sij hawm tawg propagation, uas tuaj yeem cuam tshuam kev loj hlob ntawm micro-cracks thiab ncua kev tsim cov kab nrib pleb tshiab, zoo cuam tshuam rau kev txhim kho ntawm pob zeb permeability thiab khov-thaw kuj.

2. Combines High Modulus nrog kev tsim kho yooj yim: Luv-txiav basalt fiber tsis tsuas yog leverages zoo ib yam li steel fiber ntau modulus siab thiab siab ib leeg-filament tensile zog los inhibit tawg expansion, tab sis kuj zoo overcomes lub drawbacks ntawm steel fiber, xws li yooj yim clumping thaum sib tov thiab nyuaj nrog kev siv thiab kev tsim kho.

3. Zoo Dispersibility thiab Compatibility: Raws li ib tug silicate-raws li inorganic fiber, luv-txiav basalt fiber muaj ntuj compatibility nrog cov ntaub ntawv cementitious. Nws qhov ceev (kwv yees. 2.63 ib-2.80 Nwsg/cm3) yog ze rau ntawm cov cement pob zeb thiab mortar, ua rau muaj kev ua haujlwm zoo. Ib zaug ntxiv, nws muaj peev xwm disperse uniformly thoob plaws hauv lub pob zeb ua qauv.

4. Durability zoo heev: Nto hloov kho luv-txiav basalt fiber ntau nthuav tawm "inert fiber" yam ntxwv, ua kom pom qhov ua tau zoo rau qhov kub thiab txias, corrosion, thiab cuam tshuam. Nws tswj kev ruaj ntseg txawm tias nyob rau hauv qhov kub thiab txias heev thiab corrosive ib puag ncig, thiab nws tuaj yeem txhim kho qhov deformation tsis kam ntawm cov cement matrix. Yog li ntawd, nws tuaj yeem hloov mus rau qhov chaw nruj ntawm cov pob zeb sib xyaw, nchuav, kev teeb tsa, thiab theem kev pabcuam, ho txhim kho cov durability ntawm cov pob zeb.

Hauv cov ntsiab lus, luv luv basalt fiber ntau tuaj yeem txhim kho qhov cuam tshuam ntawm cov pob zeb, txo nws cov brittleness, thiab comprehensively txhim khu nws mechanical zog. Tshwj xeeb, Nws ua haujlwm hauv cov qauv pob zeb los tiv thaiv kev tawg, tiv thaiv seepage, txhim khu durability, txhim kho kev cuam tshuam thiab tensile muaj peev xwm, thiab pab txhim kho saum npoo zoo.

4. Kev tsim kho cov txheej txheem thiab kev ceev faj rau luv luv-txiav Basalt Fiber Concrete

4.1 Kev tsim kho kub

Short-cut basalt fiber ntau pob zeb yuav tsum tau tsim nyob rau hauv qhov kub thiab txias nruab nrab ntawm —5∘C thiab 25∘C. Cov kub uas siab dhau los yog qis dhau yuav ua rau tsis sib xws ntawm qhov sib xyaw.

4.2 Kev Tswj Xyuas Kev Ua Haujlwm Zoo

Kev tswj kom zoo rau luv luv-txiav basalt fiber ntau kev tsim kho yuav tsum tsom rau kev tshuaj xyuas cov khoom siv raw, metering raug, thiab qhov zoo ntawm cov txheej txheem sib tov.

4.2.1 Mix Proportion Design

Hauv kev tsim kho tiag tiag, sib txawv luv luv basalt fiber ntau npaum li cas yuav tsum tau xaiv nyob rau hauv ib tug tsim nyog ntau yam raws li qhov project yuav tsum tau. Txij li thaum luv luv basalt fiber nws tus kheej tsis chemically hnov ​​​​mob nrog rau lwm yam khoom vaj khoom tsev los yog admixtures, nws cov koob tshuaj feem ntau tsis hloov pauv qhov qub pob zeb sib xyaw ua ke tsim qauv qauv. Thaum lub sij hawm tsim kho, qhov zoo ntawm tag nrho cov ntaub ntawv yuav tsum tau nruj me ntsis txiav txim raws li kev tsim kho kev faib ua feem thiab cov batch kom muaj nuj nqis rau ib tug mix. Table 2 muab ib qho piv txwv ntawm qhov pom kev sib xyaw ua ke rau basalt fiber reinforced pob zeb.

Kev ntsuam xyuas tau pom tias qhov ntau npaum li cas fiber ntau tsis tas yuav ua rau muaj kev sib tsoo zoo dua. Thaum cov koob tshuaj tsis tshaj 1.2kg/m3, lub zog compressive ntawm cov pob zeb qhia tau hais tias qhov sib txawv ntawm qhov pib nce ntxiv los ntawm kev txo qis (ua kom pom tus nqi siab tshaj) raws li cov fiber ntau ntau ntxiv.

4.2.2 Kev pub noj ib ntus thiab txoj kev

Thaum lub sij hawm sib tov, luv luv basalt fiber yuav tsum tau ntxiv ib txhij nrog aggregates xws li xuab zeb thiab pob zeb. Nws raug nquahu kom nchuav cov fiber ntau sib npaug rau hauv cov xuab zeb thiab pob zeb thaum lawv tso, thiab tom qab ntawd ntxiv dej rau kev sib xyaw ntub dej.

Fiber ntxiv txoj kev tuaj yeem muab faib ua phau ntawv thiab tsis siv neeg pub mis:

• Phau ntawv pub mis: Qhov hnyav basalt fiber ntau yog manually ntxiv tom qab cov kub sib sau muab tso rau hauv lub tov khoom. Txoj kev no suav nrog kev siv zog ua haujlwm siab, kuj qis sib xyaw uniformity, thiab yuav tsum muaj qhov tsim nyog txuas ntxiv ntawm lub sijhawm sib xyaw kom ntseeg tau tias muaj fiber ntau dispersion.

• Tsis siv neeg pub mis: Tsis siv neeg basalt fiber ntau dosing tshuab yog siv rau automated metering thiab ib txhij ntxiv nrog lub tov khoom kub aggregate. Fiber dosing tshuab feem ntau yog nruab nrog tsis siv neeg metering, ua ntej dispersing, thiab pneumatic conveying mechanisms, muab qhov zoo ntawm kev yooj yim, ceev ceev, thiab qhov tseeb ntxiv. Txoj kev tsim nyog yuav tsum tau xaiv raws li kev tsim kho.

4.2.3 Slump Kho

Qhov sib ntxiv ntawm fiber ntau me ntsis nce viscosity ntawm cov pob zeb sib tov, uas cuam tshuam rau qhov poob qis. Yog tias qhov poob qis tsis ua raws li kev tsim kho, ib tug plasticizer los yog dej-txo tus neeg sawv cev yuav tsum nyiam siv rau kev hloov. Qhov teeb meem yuav tsum tsis txhob daws los ntawm kev nce cov ntsiab lus dej.

4.2.4 Tsim thiab Kho

Tsis muaj qhov tshwj xeeb yuav tsum muaj rau kev tsim cov pob zeb sib xyaw nrog luv-txiav basalt fiber, tab sis txaus vibration thiab compaction yuav tsum tau guaranteed. Nws cov kev cai curing yog tib yam li cov pob zeb zoo tib yam.

Luv luv Daim Ntawv Thov Case ntawm Short-Cut Basalt Fiber Concrete

Txoj Kev Jing-Zhu Expressway (Anyang mus rau Xinxiang seem) yog txoj kev loj hauv tebchaws thiab ib feem tseem ceeb ntawm Henan Xeev txoj kev loj. Vim lub siab embankment sau thiab tsis zoo subgrade av zoo nyob rau hauv seem no, subgrade tsis sib haum xeeb thiab lwm yam tsis xws luag tshwm sim sai tom qab nws qhib. Nyob rau hauv xyoo tas los no, Nrog kev nce hauv kev ntim tsheb thiab kev nce hauv cov tsheb thauj khoom, txoj kev pavement tau pheej raug kev txom nyem los ntawm ntau yam tsis xws luag xws li longitudinal thiab transverse tawg, lub qhov, kev sib hais haum, daim phiaj tawg, thiab nquab cracking. Qhov no tsis yog tsuas yog ua phem rau kev nyab xeeb ntawm kev tsav tsheb nkaus xwb tab sis kuj ua rau muaj kev nyuaj siab heev rau kev saib xyuas txhua hnub. Tsis tas li ntawd, thawj plaub txoj kab tsim tau ntev ua tsis tau raws li kev xav tau kev thauj mus los, yuav tsum tau expansion thiab reconstruction.

Short-cut basalt fiber ntau pob zeb tau siv rau hauv subgrade filling ntawm qhov project no. Kev xyaum tau pom tias nws lub zog tensile nce ntxiv $30\%$, nws qaug zog tsis kam txhim kho los ntawm dhau $30\%$, thiab nws rutting kuj tau nce ntau dhau $300\%$. Nws tau pom tias muaj txiaj ntsig zoo hauv kev tiv thaiv cov kab nrib pleb ntev, inhibiting tawg expansion, thiab ncua kev pab cuam lub neej ntawm pavement.

Nrog nws cov khoom tshwj xeeb mechanical, zoo stability, thiab tus nqi-zoo, luv-txiav basalt fiber ntau tau dhau los ua cov khoom siv dag zog zoo. Daim ntawv thov kev cia siab rau luv-txiav basalt fiber ntau pob zeb yog qhov dav heev. Nws cov txiaj ntsig tseem ceeb hauv kev txhim kho engineering kev ua tau zoo thiab txuas ntxiv lub neej kev pabcuam yuav tsum tau txais txiaj ntsig zoo nyiaj txiag thiab kev sib raug zoo, muab tso rau nws ua ib qho tseem ceeb ntawm cov khoom siv hauv kev tsim kho vaj tse nyob rau yav tom ntej.