Puas yog Kev Siv Cov Kws Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij yuav tsum tau ua nyob rau hauv Anti-Permeable Concrete?

Anti-permeable qhob yog dav siv hauv qab daus, dej tso tsheb hlau luam, dams, cov pob zeb loj loj, thiab cov qauv zoo sib xws. Txhawm rau tiv thaiv kev tsim ntawm ntau cov kab nrib pleb thaum muab tso rau hauv pob zeb thiab ua kom tiav cov impermeability qib uas yuav tsum tau ua los ntawm cov qauv tsim, cov neeg ua haujlwm nthuav dav feem ntau ntxiv rau cov pob zeb. Qhov no ua rau cov lus nug:Puas yog kev siv cov tshuaj nthuav tawm yuav tsum tau ua los tiv thaiv permeable pob zeb?

Tom qab tshuaj xyuas cov ntaub ntawv tseem ceeb thiab sib txuas ua ke ntawm kuv tus kheej kev xyaum ua haujlwm engineering, kuv ntseeg tias nws raug nquahu kom siv cov neeg sawv cev nthuav dav hauv cov pob zeb tiv thaiv. Kuv nthuav tawm tsib qhov kev xav hauv qab no rau kev siv ntawm kuv cov phooj ywg:

Dependence ntawm Impermeability Qib:

Qhov tsim nyog ntawm kev ntxiv cov tshuaj ntxiv yog nyob ntawm qib impermeability ntawm cov pob zeb. Rau qee cov qib zoo li P6 thiab P8, nws muaj peev xwm ua tiav qhov xav tau impermeability yam tsis ntxiv cov neeg sawv cev nthuav dav los ntawm kev ua kom zoo dua qhov sib xyaw. Qhov no tuaj yeem suav nrog kev nce tus nqi ntawm cov binders tshwj xeeb lossis cov khoom sib xyaw, hloov cov xuab zeb piv, hloov cov qhab nia sib sau ua ke, lossis siv cov dej ua kom muaj txiaj ntsig zoo.

Kev tawg ntawm cov pob zeb loj, ntev tau suav tias yog "mob qog noj ntshav," tau hais los ntawm pab pawg tshawb fawb coj los ntawm xibfwb Miao Changwen ntawm Lub Tsev Kawm Ntawv ntawm Cov Khoom Siv Science thiab Engineering, Southeast University.

Rau cov qib impermeability siab dua xws li P10 thiab P12, ua tiav qhov kev xav tau impermeability yog yooj yim dua nrog kev sib ntxiv ntawm cov neeg sawv cev nthuav dav.

Txhim kho ntawm Durability:

Ntxiv cov neeg sawv cev nthuav tawm sab nraud txhim kho cov pob zeb tsis zoo, Frost tsis kam, corrosion kuj, thiab tag nrho cov kav ntev. Impermeability ua hauj lwm raws li thawj kab ntawm kev tiv thaiv rau pob zeb durability.

Tus kws tshaj lij Wu Zhongwei thiab lwm tus tau hais tias kev txhim kho cov pob zeb tsis zoo yog qhov tseem ceeb rau kev txhim kho nws cov kav ntev.

Nyob rau hauv cov ntsiab lus tam sim no ntawm deteriorating raw khoom zoo, tsis txaus ntawm tej yam ntuj tso xuab zeb thiab pob zeb cov kev pab cuam, nce extraction nqi, thiab rudimentary tswj kev xyaum, expansion agents nyob rau hauv anti-permeable qhob yog zoo tagnrho rau kev tiv thaiv cracking thiab seepage nyob rau hauv lub tsev.

Kev txiav txim siab ntawm Impermeability Qib:

Qib impermeability ntawm anti-permeable qhob yuav raug soj ntsuam siv cov txheej txheem stepwise pressurization los ntsuas dej permeability.

Cov yam ntxwv xws li qhov muaj tus neeg sawv cev nthuav dav, hom thiab ntau ntawm cov neeg sawv cev nthuav dav siv, thiab lawv qhov zoo cuam tshuam rau tus nqi thiab tus nqi ntawm cov pob zeb sib txawv nrog cov qib impermeability sib txawv.

Cov kev sib xyaw ntawm cov pob zeb sib txawv ntawm cov qib impermeability sib txawv raws li cov calcium ettringite, calcium hydroxide, magnesium hydroxide, thiab lwm yam, uas tuaj yeem txheeb xyuas tau los ntawm kev siv tshuaj ntsuam xyuas electron microscopy, microscopic spectroscopy techniques, thiab tshuaj tsom xam.

Nws yog qhov tsis raug los hloov cov neeg ua haujlwm tsis zoo uas muaj nyob rau hauv kev ua lag luam lossis ntxiv cov nyiaj tsis txaus ntawm cov neeg sawv cev nthuav dav raws li kev tsim qauv sib xyaw. Cov kev coj ua zoo li no tuaj yeem tshawb pom los ntawm kev sim tsim nyog.

Kev xaiv cov neeg ua haujlwm nthuav dav kom tsim nyog:

Kev xaiv ntawm cov neeg sawv cev nthuav dav yuav tsum yog nyob ntawm tus qauv tsim tus nqi ntawm kev txwv qhov kev nthuav dav, cov yam ntxwv ntawm cov qauv engineering, thiab kev siv ib puag ncig.

Cov neeg ua haujlwm nthuav dav siv calcium ettringite raws li qhov chaw nthuav dav yuav tsum tsis txhob siv rau hauv cov qauv pob zeb uas raug rau qhov kub thiab txias tsis tu ncua siab tshaj 80 degree. Thaum nyob ib ncig ntawm 70 degree, calcium ettringite decomposes tsim monosulfate-hom hydrated aluminium calcium sulfate, thiab thaum txias, nws hloov kho, ua rau ncua kev nthuav dav uas tuaj yeem ua rau cov qauv puas.

Kev tsim ntawm calcium ettringite yog ib qho kev sib cais-ua kom nag lossis daus siv lead ua cov tshuaj tiv thaiv uas xav tau cov dej ntau heev. Yog tsis muaj kev kho dej sab nraud, pob zeb sib xyaw nrog sulfate-aluminate calcium-based expansion agents yuav luag tsis muaj kev nthuav dav.

Cov neeg ua haujlwm nthuav dav siv calcium oxide raws li qhov chaw nthuav dav vam khom feem ntau ntawm kev tsim cov calcium hydroxide hauv cov dej sib tov los tsim cov theem nthuav dav. Lawv tuaj yeem koom nrog hauv hydration ntxiv los tsim cov calcium silicate hydrate gel ntxiv, txhim kho cov pob zeb ntom ntom thiab impermeability.

Calcium oxide-based expansion agents raug pom zoo rau cov xwm txheej tsis muaj dej kho sab nraud thiab thaum lub caij ntuj no tsim.

Dosage ntawm Expansion Agents:

Raws li qib impermeability ntawm anti-permeable qhob nce, qhov ntau npaum li cas ntawm expansion agents yuav tsum tau nce, tab sis yuav tsum tsis txhob ntau tshaj 12%.

Cov neeg sawv cev nthuav dav feem ntau xav tau dej ntau dua li cov cement zoo tib yam thiab muaj cov tshuaj tiv thaiv dej sai sai. Yog li ntawd, lub flowability ntawm anti-permeable qhob uas muaj expansion agents yog qis dua li ntawm cov pob zeb zoo tib yam nrog tib cov dej ntsiab lus thiab cov dej reducer ntau npaum. Tsis tas li ntawd, kev poob qis hauv lub sijhawm yog ntau dua piv rau cov pob zeb zoo tib yam. Cov xwm txheej no yuav tsum tau xav txog thaum sib xyaw tsim thiab tsim kho.

Txawm li cas los xij, cov pob zeb sib xyaw nrog cov tshuaj nthuav dav feem ntau pom zoo cohesiveness thiab qis los ntshav.

Xaus:Txawm hais tias nws tsis yog qhov yuav tsum tau siv cov tshuaj nthuav dav hauv txhua hom kev tiv thaiv permeable, lawv siv tau pom zoo, tshwj xeeb tshaj yog rau qib siab impermeability (P10, P12) thiab nyob rau hauv cov xwm txheej uas txhim kho durability thiab impermeability tseem ceeb heev. Kev xaiv kom raug thiab ntau npaum li cas ntawm cov neeg sawv cev nthuav dav tuaj yeem txhim kho kev ua tau zoo thiab kev ua haujlwm ntev ntawm cov pob zeb ua vaj tse.