1. Raw khoom xaiv ntawm cov pob zeb npaj txhij
Vim tias koj paub txog cov cement thiab xuab zeb, niaj hnub no peb tsom mus rau kev xaiv ntawm ob cov ntaub ntawv raw: pob zeb sib xyaw thiab cov khoom sib xyaw.
Cov hom kev sib xyaw ua ke feem ntau yog dej txo tus neeg saib xyuas, tus neeg sawv cev siv dej, tshuaj tiv thaiv kab mob, tshuaj tiv thaiv kab mob, tus neeg saib xyuas lub zog thaum ntxov, tus neeg sawv cev rov qab, tus neeg sawv cev nthuav dav, tus neeg saib xyuas huab cua, thiab lwm yam. antifreeze, lub zog thaum ntxov, huab cua nkag, txo dej thiab lwm yam khoom. Nws cov ntsiab lus tseem ceeb yog sodium nitrite, lawv tuaj yeem txo qhov khov ntawm cov pob zeb sib tov, tiv thaiv kev ua vaj tse nyob rau lub caij ntuj no nyob rau hauv qhov kub tsis zoo tshwm sim los ntawm Frost puas tsuaj, kom ntseeg tau tias kev tsim kho ntawm cov pob zeb tsis zoo. Nws yog nruj me ntsis txwv tsis pub siv ntsev es tsis txhob sodium nitrite, vim hais tias ntsev muaj chloride ions, uas yuav corrode lub steel bar.
Feem ntau siv pob zeb sib xyaw muaj xws li ya tshauv, slag hmoov thiab volcanic tshauv. Tshwj xeeb tshaj yog, Qib I ya tshauv, slag hmoov thiab silica fume muaj txiaj ntsig zoo. Hauv kev xyaum ua engineering, "ob chav sib xyaw" thev naus laus zis feem ntau yog siv, uas yog, sib xyaw cov hmoov tshauv thiab slag hmoov nyob rau tib lub sijhawm, txhawm rau npaj cov khoom siv zoo tib yam, muaj zog thiab ua haujlwm siab, uas tuaj yeem txuag cov cement, txhim kho cov khoom siv. workability, lub zog thiab durability ntawm cov pob zeb, thiab txo cov cua sov ntawm hydration ntawm cov pob zeb loj, uas tuaj yeem ua tau raws li kev tsim kho kev cai ntawm cov haujlwm sib txawv.
2. Kev tswj xyuas zoo ntawm cov txheej txheem ua pob zeb
(1) Nws yog nruj me ntsis txwv tsis pub ntxiv dej hauv cov txheej txheem ntawm kev thauj mus los, kev thauj mus los thiab nchuav.
(2) Thaum ob hom kev sib zog ntawm cov pob zeb tau nchuav rau tib lub sijhawm, lub tsheb thauj khoom yuav tsum tau nruab nrog cov cim qhia qib zog, thawj zaug cov qib siab zog, tom qab ntawd nchuav cov qib qis zog, twj tso kua mis thiab cov neeg ua haujlwm tsim kho yuav tsum nyob ze. tiv tauj ib leeg los tiv thaiv mispouring ntawm pob zeb.
(3) Ua ntej qhov kev teeb tsa zaum kawg ntawm cov pob zeb, kev kho plaster ntawm qhov chaw pouring yog qhov zoo los tswj cov kab nrib pleb thiab txhim kho qhov zoo ntawm cov pob zeb. Tshwj xeeb, tom qab cov pob zeb hauv pem teb pouring, cov ntoo trowel yuav tsum tau rubbed ntau tshaj li ob zaug kom tshem tawm cov kab nrib pleb thaum ntxov ua ntej qhov chaw ua vaj tse zaum kawg.
