Video: Dab tsi kub kub dhau rau pob zeb Australia?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Qhov zoo tagnrho curing kub yog 23°C. Kho pob zeb tsawg kawg yog 7 hnub. Nco tseg: 35 ° C yog qhov siab tshaj plaws pob zeb kub rau qhov chaw tso cai raws li AS1379.
Kuj paub, dab tsi kub kub dhau rau pob zeb?
Qhia tawm: Huab cua kub tsis yog ib lo lus dav dav thaum tham txog nchuav a pob zeb slab. Huab cua kub txhais tau tias yog siab ambient kub saum toj no 90 ° F, tsis tshua muaj txheeb ze av noo thiab / los yog cua kub ceev. Cov xwm txheej no tau piav qhia ntxiv raws li ACI 305.
Tom qab ntawd, lo lus nug yog, qhov tsawg kawg nkaus thiab qhov siab tshaj plaws ntawm pob zeb yog dab tsi? Qhob Kub txwv
| Qhov loj me ntawm cov seem, cm | Qhov ntsuas kub tsawg kawg ntawm cov pob zeb tau muab tso rau thiab khaws cia thaum lub sijhawm tiv thaiv, ° C |
|---|---|
| Tsawg dua 30.48 | 12.77 |
| 30.48 txog 91.44 | 10 |
| 91.44 rau tsawg dua 182.88 | 7.22 |
| Ntau tshaj 182.88 | 4.44 |
Yog li ntawd, nws puas zoo rau ncuav pob zeb hauv huab cua kub?
POURING CEEB TOOM nyob rau hauv huab cua kub . Lub caij ntuj sov kub, tsis muaj av noo, ncaj qha tshav ntuj, siab pob zeb qhov kub thiab txias txawm tias cua nrawm tuaj yeem ua rau pob zeb nto cracking (yas shrinkage tawg). Yas shrinking kab nrib pleb tshwm sim thaum nto ya raws evaporates sai heev.
Koj puas tuaj yeem ncuav pob zeb hauv 100 degree huab cua?
Nyob rau hauv lub caij ntuj sov, lub pob zeb yuav siv sij hawm ntev los teem cia cov crystals tsim nyob rau hauv lub pob zeb sij hawm ntxiv ntxiv. Conversely, warmer temps txhais tau hais tias muaju tsim sai dua, tso cai rau lub sij hawm tsawg zog. Piv txwv li, ntawm 100 degrees Fahrenheit, pob zeb ua tau teem sijhawm tsawg li ob teev.
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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Dab tsi yog qhov txawv ntawm pob zeb pob zeb thiab cov cement slab?
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Ib tug footing yog muab tso rau hauv qab ntawm Frost kab thiab ces cov phab ntsa ntxiv rau saum. Qhov taw qhia yog dav dua phab ntsa, muab kev txhawb nqa ntxiv ntawm lub hauv paus ntawm lub hauv paus. Lub hauv paus T-shaped yog muab tso rau thiab tso cai rau kho; thib ob, cov phab ntsa yog tsim; thiab thaum kawg, lub slab yog nchuav ntawm phab ntsa