Video: Dab tsi yog huab cua voids hauv pob zeb?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Cov huab cua voids yog tshwm sim los ntawm cua cuab ntawm cov pwm nto thiab qhob . Lawv feem ntau tshwm nyob rau hauv qis qis qhob thiab tuaj yeem pom hauv qab tsis xwm yeem (tsis yog kheej kheej) zoo li daim ntawm cov khoom sib tsoo. Qhov no yog qhov tshwm sim los ntawm kev muaj cov tshuaj khib nyiab tsawg dhau los ua kom cov chaw nyob ib puag ncig sib sau ua ke.
Ua qhov no hauv kev txiav txim siab, dab tsi yog voids hauv pob zeb?
Qhob voids yog kab noj hniav lossis qhov me me uas tshwm rau ntawm qhov chaw qhob castings. Nto tsis muaj dab tsi tseem hu ua "bug qhov" lossis "ntses qhov muag". Cov no voids yuav tsim qhov pom tsis tau ntawm qhov saum npoo ntawm qhov ua tiav casting.
Ib yam nkaus, cov ntsiab lus huab cua hauv pob zeb ua dab tsi? A. Intentionally entrained cua voids txhim kho qhov tsis kam ntawm qhob kom puas los ntawm cycles ntawm khov thiab thawing. Ib qho cua voids txo lub zog ntawm qhob , nrog kwv yees li 5% txo lub zog rau txhua 1% nce hauv qhov ntim ntawm cua tsis muaj dab tsi. Cua voids, txawm li cas los xij, kuj txhim kho kev ua haujlwm tau zoo ntawm qhob.
Ntawm no, dab tsi yog huab cua voids?
Huab cua voids yog me me airspaces los yog hnab ris ntawm cua uas tshwm sim nruab nrab ntawm cov txheej txheej sib xyaw ua ke hauv qhov sib xyaw ua ke zaum kawg.
Dab tsi ua rau muaj huab cua siab hauv pob zeb?
kub nce. Nyob rau hauv lem, cov ntsiab lus huab cua ib txwm nce thaum twg qhob lossis qhov kub ib puag ncig txo; ob qho tib si uas yuav xav tau kev kho tshuaj ntau npaum li cas ntawm AEA. Kev hloov pauv ntawm qhov kub thiab txias feem ntau tsis cuam tshuam rau cua void system. Cov khoom cua tuaj yeem hloov pauv 20% -30% nrog kev hloov pauv kub 20F.
Pom zoo:
Yuav ua li cas yog qhov tsawg kawg nkaus pob zeb npog nyob rau hauv mm ntawm ib tug cam khwb cia nyob rau hauv qhov chaw pob zeb tso tawm tsam thiab mus tas li raug rau lub ntiaj teb?
Table-1: Yam Tsawg Npog Thickness rau Cast-in-Place Qhob Hom kev tsim ua vaj tse hla, hli Qhob nrum tiv thaiv thiab txuas mus tas li nrog hauv av 75 Pob zeb sib chwv nrog av lossis dej No. 19 txog No. 57 tuav 50 No. 16 bar thiab me dua 40
Dab tsi yog qhov siab tshaj plaws rau lub pob zeb pob zeb?
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