Cov tshuaj chloride hauv cov pob zeb ua rau cov hlau reinforcing xeb sai dua, cuam tshuam cov txheej oxide tiv thaiv thiab ua rau muaj xeb hauv zos. Cov tshuaj chloride ntau tshaj 0.4% los ntawm qhov hnyav ntawm cov cement ua rau muaj kev xeb ntawm cov hlau reinforcing, txo qhov ruaj khov ntawm cov qauv thiab ua rau cov hlau poob ntau. Kev kuaj pom thiab kev ntsuas cov tshuaj chloride yog qhov tseem ceeb rau kev tiv thaiv lub neej ntawm cov khoom siv.
Cov ntsiab lus chloride hauv cov pob zeb ua vaj tse
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Cov txheej txheem ntawm Chloride Corrosion
Cov chloride ions nkag mus rau hauv cov pob zeb los ntawm kev sib kis, kev nqus capillary, thiab convection. Kev raug rau ntawm qhov chaw, cov kab nrib pleb, lossis kev puas tsuaj ntawm cov txheej txheem ua rau cov chloride nkag mus sai dua. Cov kev hloov pauv ntawm cov concentration ua rau cov chloride tsiv mus rau lwm qhov. Cov kab nrib pleb me me los ntawm cov khoom siv kho tshuab hloov pauv txoj kev thauj mus los thiab ua rau muaj kev pheej hmoo ntawm kev xeb.
Cov tshuaj chloride sib sau ua ke ntawm qhov sib tshuam ntawm cov hlau thiab cov pob zeb ua rau muaj kev puas tsuaj hauv zos. Cov zaj duab xis oxide passive tawg, ua rau muaj kev pib xeb. Cov ntsiab lus chloride rau kev xeb nyob ntawm pH ntawm cov pob zeb thiab kev nkag tau. Kev tshawb fawb qhia tau tias kev xeb pib ntawm cov tshuaj chloride concentration qis li 0.2–0.4% los ntawm qhov hnyav ntawm cov cement thaum kev nkag tau siab.
Cov kev tshawb fawb bimodal neutron thiab X-ray microtomography tsis ntev los no qhia txog kev tsim cov xeb me me thiab kev poob ntawm kev sib txuas ntawm cov hlau-pob zeb.
Kev txo qhov permeability ua rau qeeb qeeb kev thauj chloride thiab ua rau lub zog reinforcement ntev dua. XRF hlau analyzer rau concrete, suav nrog Lonnmeter, muab kev tshuaj xyuas chlorine tsis ua puas tsuaj, sai sai txheeb xyuas cov cheeb tsam uas muaj kev pheej hmoo rau kev xeb ntawm cov hlau reinforcing hauv concrete.
Kev xeb ntawm cov hlau hauv cov pob zeb ua los ntawm chloride
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Kev daws teeb meem tiv thaiv kev xeb
Chromium (Cr) thiab cov khoom siv tsis tshua muaj (RE) hauv cov hlau rebar txo qhov xeb ntawm cov hlau reinforcing hauv cov pob zeb hauv qab chloride raug. Kev tshawb fawb ntawm HRB400 rebar qhia tau hais tias Cr cov ntsiab lus saum toj no 0.5% thiab RE txhim kho hloov MnS mus rau hauv RE-Al-O-S suav nrog enveloped los ntawm MnS plhaub, qeeb qeeb hauv zos acidification thiab txo qis "occluded cell" corrosion propagation. Qhov tshwm sim yog qis dua corrosion tam sim no densities thiab txhim kho passive zaj duab xis stability, ntsuas tau txawm tias ntawm chloride concentration saum toj no 0.6% los ntawm qhov hnyav ntawm cement - sawv cev rau 30-50% txo qis hauv corrosion piv rau cov hlau rebar tiaj tus nyob rau hauv tib yam mob (Nature Communications, 2026).
Kev siv tau tiag tiag suav nrog scandium lossis cerium alloying, muab kev txhim kho pom tseeb hauv lub zog kho tshuab thiab kev ruaj khov mus sij hawm ntev rau cov khoom siv hauv marine thiab deicing ntsev. Cov nqi thiab kev txwv ntawm kev muab RE cuam tshuam rau kev nkag mus rau hauv kev lag luam tab sis txo cov kev xav tau kho lub neej.
Cov kev ntsuam xyuas tau lees paub ntau ntxiv tias kev sib xyaw cov hlau fibers nrog rebar txiav cov kab nrib pleb thiab qhov nrawm ntawm kev xeb, tshwj xeeb tshaj yog nyob rau hauv cov chloride ntau hauv cov pob zeb ua vaj tse. Kev txhawb nqa sib xyaw ua rau lub sijhawm pib tawg thiab txhim kho lub peev xwm nqa khoom tom qab raug (MDPI, 2025).
Xaiv cov khoom siv ntxiv raws li kev tshuaj xyuas kev pheej hmoo xeb uas ua rau muaj chloride thiab lub neej ua haujlwm ntawm qhov project kom tsis txhob muaj kev puas tsuaj loj heev. Kev tshuaj xyuas cov tshuaj chlorine siv XRF hlau analyzer rau cov pob zeb ua vaj tse, xws li lub cuab yeej Lonnmeter, txhawb kev sim tsis ua puas tsuaj ntawm cov khoom siv ntxiv kom pom tseeb tias cov tshuaj yaj thiab cov fiber ua haujlwm zoo, ua kom ntseeg tau tias muaj kev tiv thaiv xeb hauv cov pob zeb ua vaj tse thiab ua kom lub neej ua haujlwm ntev tshaj plaws.
Kev Tshawb Fawb Txog Chlorine Elemental thiab Kev Tshawb Fawb Txog Lub Teeb Hauv Cov Pob Zeb
Kev ntsuas cov chlorine thiab cov ntsiab lus ntawm lub teeb yog qhov tseem ceeb rau kev tiv thaiv xeb hauv cov pob zeb ua vaj tse. Cov chloride ions saum toj no 0.2–0.4% los ntawm qhov hnyav ntawm cov cement ua rau muaj kev poob passivation thiab xeb sai ntawm cov hlau reinforcing, ua rau cov qauv puas tsuaj thiab cov nqi txij nkawm sai dua. Cov txheej txheem txiav txim siab analytical cais ua kev puas tsuaj.
Cov txheej txheem rhuav tshem muab qhov tseeb siab tab sis xav tau kev rho tawm lub hauv paus thiab kev tshuaj xyuas hauv chaw kuaj mob uas siv zog ntau, ua rau kev pabcuam cuam tshuam thiab kev poob qauv tsis rov qab. Kev sim tsis rhuav tshem, siv kev tshuaj xyuas XRF rau kev kuaj xeb lossis lub tshuab tshuaj xyuas hlau XRF rau cov pob zeb ua vaj tse, ua rau muaj kev tshuaj xyuas sai, hauv qhov chaw chlorine thiab lub teeb yam tsis muaj kev puas tsuaj qauv. Lub tshuab tshuaj xyuas Lonnmeter XRF ntsuas Mg, Al, Si, S, K, Ca, thiab Cl hauv cov pob zeb ua vaj tse khov kho, muab cov kev txwv kev kuaj pom hauv qab 50 ppm rau Cl. Cov txiaj ntsig txhawb nqa kev xaiv cov hlau txhawb nqa uas tiv taus xeb thiab taug qab qhov ua tau zoo ntawm cov tshuaj tiv thaiv xeb rau kev txhawb nqa hlau. Cov txheej txheem ua haujlwm siab heev siv XRF ua kom muaj zog ntev ntawm cov pob zeb txhawb nqa los ntawm kev kuaj pom chloride ua rau xeb hauv cov qauv pob zeb ua vaj tse thaum ntxov, coj kev cuam tshuam thiab kev faib cov peev txheej.
Kev Tshawb Nrhiav Siab Tshaj Plaws&Cov Txheej Txheem Ntsuas rau Cov Chloride Content
Kev ntsuam xyuas hauv chav kuaj siv cov txheej txheem ntsuas volumetric, cov electrodes xaiv ion, thiab cov txheej txheem potentiometric, uas ua rau muaj kev nkag siab zoo rau cov ntsiab lus chloride hauv cov pob zeb ua vaj tse thiab cov hlau txhawb nqa. Cov txheej txheem no muaj kev pheej hmoo ntawm kev puas tsuaj ntawm cov qauv, kev siv zog ua haujlwm, thiab kev kos duab qhov chaw tsawg hauv qhov chaw. Cov microelectrode probes hauv thaj chaw ua rau muaj kev kuaj pom hauv zos tab sis muaj teeb meem nrog kev ntsuas cov chlorides me me thiab cov khoom sib dua.
Cov khoom siv tshuaj xyuas hlau XRF, tshwj xeeb tshaj yog Lonnmeter, muab kev tshuaj xyuas ntau yam tsis ua puas tsuaj, sai sai ntawm cov qauv pob zeb khov kho thiab cov qauv hlau rebar. Lonnmeter ntes tau chlorine thiab cov khoom sib dua (Mg, Al, Si, S, K, Ca) nrog kev rhiab heev ntawm ppm, muab kev nkag siab tseem ceeb rau cov hlau txhawb nqa uas tiv taus xeb thiab kev ntsuam xyuas kev pheej hmoo. Nws cov software muaj zog sib txawv qhov sib txawv ntawm cov tshuaj chloride ua rau muaj xeb hauv cov qauv pob zeb, txhawb kev tiv thaiv kev xeb tseem ceeb hauv cov pob zeb txhawb nqa.
Kev sib koom ua ke ntawm cov txheej txheem thaij duab tshiab, xws li XRF, multi-modal tomography, thiab advanced elemental mapping, qhia txog ob qho tib si cov chloride ntau thiab cov chaw xeb me me. Ua ke, cov txheej txheem no ntsuas cov tshuaj tiv thaiv xeb rau kev txhawb nqa hlau thiab txhawb nqa lub zog ntev ntawm cov pob zeb reinforced.
Kev Txhawb Nqa Lonnmeter XRF Analyzer rau Kev Ntsuas Chloride Content
Cov cuab yeej ntsuas XRF ntawm Lonnmeter xa cov kev tshuaj xyuas sai thiab tsis ua rau puas tsuaj rau cov chlorine uas tseem ceeb rau kev ntsuas cov chloride hauv cov pob zeb ua vaj tse. Lawv qhov kev rhiab heev siab ntes tau chlorine thiab cov khoom sib dua (Mg, Al, Si, S, K, Ca) ntawm qib qis li 0.35–1% Cl, ua rau kev ntsuas qhov tseeb ntawm cov chlorides me me uas txiav txim siab qhov kev pheej hmoo ntawm kev xeb thiab kev ruaj khov ntawm cov qauv pob zeb ua vaj tse.
Kev tsim qauv uas yooj yim nqa tau tso cai rau kev tshuaj xyuas ntawm qhov chaw, ua rau cov engineers ua qhov kev tshuaj xyuas cov ntsiab lus tiag tiag ntawm cov pob zeb khov kho lossis cov qauv rebar thiab txheeb xyuas cov cheeb tsam uas muaj feem yuav raug chloride ua rau xeb hauv cov qauv pob zeb. Cov software interfaces robust ua rau cov txheej txheem ua haujlwm yooj yim dua, tso saib ntau cov txiaj ntsig rau kev txiav txim siab sai ntawm kev xaiv cov hlau reinforcement uas tiv taus xeb.
Lonnmeter XRF thev naus laus zis zam cov chaw muaj radioactive, xav tau kev npaj qauv tsawg kawg nkaus thiab muab ntau yam kev kuaj pom uas xav tau rau cov tswv yim tiv thaiv kev xeb. Kev thov tus nqi tso cai rau kev teeb tsa tus neeg soj ntsuam, kev txhawb nqa kev cob qhia, thiab kev sab laj txog kev siv tshuab, ua kom zoo dua qhov kev sim tsis puas tsuaj ntawm cov pob zeb txhawb nqa kom ruaj khov mus ntev ntawm cov pob zeb txhawb nqa thiab cov tshuaj tiv thaiv xeb zoo rau cov hlau txhawb nqa.
Cov Lus Nug Feem Ntau (FAQs)
Qhov tseem ceeb ntawm kev ntsuas cov chloride hauv cov pob zeb ua vaj tse yog dab tsi?
Kev ntsuas qhov tseeb ntawm cov chloride hauv cov pob zeb ua vaj tse yog qhov tseem ceeb rau kev ntsuam xyuas qhov kev pheej hmoo ntawm kev xeb rau cov hlau reinforcing thiab los kwv yees lub neej ua haujlwm. Kev xeb los ntawm chloride ua rau kwv yees li 40% ntawm kev puas tsuaj ntawm cov pob zeb reinforced thoob ntiaj teb. Cov ntaub ntawv hauv chav kuaj qhia tias kev xeb pib thaum cov chloride concentration ntau dua 0.4% los ntawm qhov hnyav ntawm cement. Kev txheeb xyuas cov chloride nkag mus rau hauv cov pob zeb ua vaj tse ua rau muaj kev saib xyuas thiab txo nqi.
Cov chloride ions ua rau muaj xeb li cas hauv cov hlau reinforcement?
Cov tshuaj chloride ions nkag mus rau hauv cov pob zeb ua vaj tse, mus txog rau txheej oxide passive ntawm cov hlau. Qhov no cuam tshuam rau cov hlau passivation thiab pib qhov chaw xeb. Qhov tshwm sim yog kev tsim xeb, kev poob ntawm txoj kab uas hla hlau, kev tawg, thiab kev tawg.
Cov fibers puas tuaj yeem txhim kho kev tiv thaiv corrosion nrog rau rebar hauv concrete?
Cov kev tshawb fawb qhia tias kev siv cov fibers thiab rebar ua ke ua rau lub sijhawm xeb ntev dua txog li 40%, ua rau cov qauv pob zeb ua kom ruaj khov mus ntev.
Dab tsi ua rau Lonnmeter XRF analyzer zoo tagnrho rau kev kuaj pob zeb?
Lub tshuab ntsuas hlau Lonnmeter XRF muab kev tshuaj xyuas sai, tsis ua puas tsuaj, thiab ntau yam khoom ntawm cov qauv khoom khov. Nws ua tiav qhov txwv ntawm 10 ppm rau chlorine thiab ntsuas cov ntsiab lus sib dua (Mg, Al, Si, S, K, Ca) tseem ceeb hauv kev txheeb xyuas xeb theem pib, thiab ua kom zoo dua cov tswv yim tiv thaiv xeb.
Cov khoom siv txhawb nqa zoo li Cr thiab RE puas tiv taus xeb ntau dua?
Cov hlau txhawb nqa uas hloov kho los ntawm Chromium thiab cov hlau tsis tshua muaj (RE) ua rau muaj kev tiv thaiv xeb ntau dua 50% piv rau cov hlau txheem, tshwj xeeb tshaj yog nyob rau hauv cov chaw muaj ntsev, raws li tau lees paub hauv kev sim hauv chav kuaj.
Vim li cas qhov permeability ntawm cov pob zeb tseem ceeb rau kev tiv thaiv xeb?
Qhov kev nkag tau qis dua txwv tsis pub chloride tsiv teb tsaws chaw, tswj cov hlau passivation thiab ncua qhov pib xeb dhau lub voj voog kev pabcuam ib txwm muaj.
Cov thev naus laus zis XRF txawv li cas ntawm cov kev kuaj tshuaj lom neeg rau kev tshuaj xyuas chloride?
Kev tshuaj xyuas XRF tsis tas yuav tsum muaj cov qauv yaj lossis cov kua qaub, tsis zoo li cov tshuaj ntub. Nws ua haujlwm sai, nyob ntawm qhov chaw, thiab muab kev tshuaj xyuas ntau yam chlorine tib lub sijhawm - pab tau rau kev sim tsis ua rau puas tsuaj ntawm cov khoom siv pob zeb.
Lub sijhawm tshaj tawm: Lub Ob Hlis-13-2026
