Cov txheej txheem:
- Txoj Kev Txhim Kho Lub Sij Hawm Ntawm Cov Khoom Siv Ua Haujlwm
- Ua rau tsis muaj kev ruaj ntseg hauv pob zeb
Video: Yuav ua li cas cuam tshuam rau lub durability ntawm pob zeb?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Pob zeb yog heterogeneous khoom, thaum tshiab pob zeb yog raug rau kub tus nqi ntawm hydration tau txais cuam tshuam thiab lub zog thiab kav ntev ua txo. Pob zeb Cov khoom xyaw muaj qhov sib txawv thermal coefficients, yog li ntawm qhov kub thiab txias, spalling thiab deterioration ntawm pob zeb tshwm sim.
Tsis tas li ntawd, koj tuaj yeem ua kom lub zog ntawm cov pob zeb ua kom muaj zog?
Txoj Kev Txhim Kho Lub Sij Hawm Ntawm Cov Khoom Siv Ua Haujlwm
- Mix Design. Durability pib nrog kev sib xyaw ua ke tsim tsim nyog rau cov kev pabcuam uas cov pob zeb yuav raug nthuav tawm.
- Kev tsim kho pob qij txha.
- Tiv thaiv kom tsis txhob muaj dej tsis txaus thaum muab tso.
- Tsawg Permeability.
- Kev kho kom raug.
- Tiv thaiv pob zeb los ntawm De-icing ntsev tom qab kho.
- Kev Tso Cai.
Ib sab saum toj no, vim li cas pob zeb durability tseem ceeb? Cov durability ntawm pob zeb Nws yog ib qho tseem ceeb uas hais txog tus qauv lub neej. Cov qhov tseem ceeb ntawm pob zeb durability tsis tuaj yeem kwv yees. Qhob durability Nws tsuas yog txhais tau tias nws muaj peev xwm tiv taus huab cua thiab tshuaj tua kab mob, thaum tswj xyuas cov khoom siv engineering uas xav tau.
yam dab tsi cuam tshuam rau qhov zoo ntawm pob zeb?
Lub zog pob zeb yog cuam tshuam los ntawm ntau yam, xws li qhov zoo ntawm raw khoom , dej / cement ratio , coarse/fine aggregate ratio, hnub nyoog ntawm pob zeb, compaction ntawm pob zeb, kub , txheeb ze humidity thiab curing ntawm pob zeb.
Dab tsi yog qhov ua rau kev ua tsis tiav?
Ua rau tsis muaj kev ruaj ntseg hauv pob zeb
- Ua rau sab nraud: Huab cua huab cua tsis zoo. Kub kub heev. Humidity heev. Kev puas tsuaj. Electrolytic Action.
- Ua rau sab hauv. a) Lub cev. Kev hloov pauv vim qhov sib txawv ntawm cov khoom thermal ntawm cov khoom sib xyaw thiab cov cement paste. Frost Action. b) Tshuaj.
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
Koj puas xav tau ib lub pob zeb ua pob zeb rau lub tsev?
Lub pob zeb ua pob zeb yog yam tsis muaj kev ntseeg siab tshaj plaws ntawm daim ntawv pov thawj. Tuab zoo compacted qhob muab ib theem ruaj khov puag uas yog resistant rau te thiab laus hauv av zog
Yuav ua li cas yog lub pob zeb pob zeb rau ib lub tsev nqi?
Lub pob zeb ua pob zeb rau lub tsev yuav raug nqi ntawm $ 4.00 thiab $ 5.00 ib square feet yog tias koj ua tag nrho cov haujlwm npaj. Yog tias koj ntiav ib tus neeg ua haujlwm rau koj, tus nqi tuaj yeem yog ob npaug, lossis siab dua. Tsuas yog muab qhov ntev thiab qhov dav ntawm koj qhov kev thov los ntawm $ 4 lossis $ 5
Muaj pes tsawg cubic meters ntawm pob zeb nyob rau hauv lub pob zeb tsheb?
Cov tsheb hnyav 20,000 txog 30,000 phaus (9,070 txog 13,600 kg), thiab tuaj yeem nqa tau li ntawm 40,000 phaus (18,100 kg) ntawm pob zeb txawm hais tias muaj ntau qhov sib txawv ntawm cov khoom sib txawv tam sim no siv. Cov tsheb loj tshaj plaws yog 8 cubic yards (6.1m3)
Yuav ua li cas kho qhov void ntawm lub pob zeb pob zeb?
Xuab zeb-Cement Grout Ib qho xuab zeb-cement grout tuaj yeem siv los sau cov voids hauv qab pob zeb. Qhov sib tov ntawm xuab zeb, cement, thiab dej yog siv los ntawm qhov drilled los sau cov voids. Thaum txoj kev no ntawm slab jacking yog tus nqi-zoo, muaj qhov cuam tshuam loj rau kev xaiv rau hom kev kho no