pob zeb yog cov khoom tsim los ntawm tib neeg ua los ntawm peb yam: binder, aggregate thiab hnyav. Nws yog qhov nyuaj heev los xav txog peb lub neej yam tsis muaj cov khoom siv hauv tsev no; nws yog siv los tsim cov hauv paus tsev, tsim cov pob zeb zoo nkauj, cov kev taug kev. Nws yog dav siv nyob rau hauv ntau yam ntawm tib neeg lub neej. Nws yog cov khoom siv pheej yig, thiab nws qhov kev faib tawm yog tsim nyog los ntawm kev lag luam, ib puag ncig thiab kev ua haujlwm ntawm qhov pom.
Kev npaj pob zeb: proportions
Cov ntawv nplaum yog cov cement, cov hmoov ntxhia pob zeb uas, thaum dej ntxiv, tsim cov yas "cov hmoov nplej". Cov huab cua qhuav dhau lub sijhawm thiab dhau mus rau hauv lub xeev zoo li pob zeb. Cov qauv tuaj nrog ntau qib ntawm kev ua haujlwm load. Kev npaj kom raug ntawm pob zeb yog nyob ntawm qhov no. Cov proportions nyob rau hauv nws muaj pes tsawg leeg ntawm cement raws li ib tug binder thiab lwm yam Cheebtsam yog ib qho tseem ceeb ntawm cov nyiaj txiag thiab functionality. Lub ntsiab hom: Portland cement,slag thiab alumina. Txhawm rau kom tsis txhob ua yuam kev nrog kev xaiv ntawm cov khoom siv thiab tsis tuaj yeem tsis meej pem hauv lub cavalcade ntawm hom thiab lub hom phiaj ntawm cov khoom tshwj xeeb, tau txais lus qhia los ntawm tus neeg muag khoom lossis nyeem cov lus qhia.
Dej yog xav tau los dilute pob zeb. Koj yuav tsum tau ceev faj nrog cov ntsiab lus no. Ib tug loj npaum li cas ntawm cov dej tsis tsuas yog cuam tshuam rau cov qauv ntawm cov huab hwm coj, tab sis kuj ua phem rau nws styling. Cov txiaj ntsig tib yam tau txais yog tias nws qhov tsis txaus. Thaum cov pob zeb tau npaj, qhov sib npaug ntawm cov dej rau lwm qhov yuav tsum tau ua nruj me ntsis.
Qhov thib peb yog qhov chaw. Lawv tuaj yeem ua ob yam khoom ib zaug - pob zeb lossis pob zeb crushed. Gravel yog ib qho sib npaug ntawm cov pob zeb xoob sedimentary xws li qhov loj ntawm 2 mus rau 20 mm. Nws tso cai rau koj los ua kev npaj ua vaj tse ntau dua kev lag luam. Cov proportions ntawm no tivthaiv nyob rau hauv nws muaj pes tsawg leeg yog ncaj qha proportional rau qhov xav tau degree ntawm lub zog ntawm cov khoom raug tsim. Tsis tas yuav overspend cement, ntxiv qhov tsim nyog ntawm ib lossis lwm cov khoom xyaw yuav ua kom muaj kev ntseeg siab ntawm cov qauv. Pob zeb tshwm sim hiav txwv, dej, pas dej. Crushed pob zeb ua haujlwm zoo sib xws. Cov no yog cov khoom tawg ntawm cov pob zeb lossis cov khoom siv pob zeb uas muaj qhov nruab nrab ntawm 5-25 hli. Hauv qee qhov chaw, pob zeb yog pheej yig dua, hauv lwm tus - pob zeb crushed. Nyob ntawm koj cheeb tsam, koj tuaj yeem xaiv cov khoom uas pheej yig dua.
Cov lus hauv qab no qhia qhov ntim ntawm txhua yam uas xav tau rau kev npaj ua vaj tse. Cov proportions yog nruab nrab, noj mus rau hauv tus account lub fact tias cov khoom tseem ceeb- cement, tag nrho qhov hnyav yog 1 kaum-liter thoob (16 kg).
| Type of concrete | Sand pebbles, crushed pob zeb (liter) | Dej (liter) |
| Basic concrete | 200 | 40 |
| Reinforced concrete | 150 | 35 |
| pob zeb rau lub hauv paus | 130 | 30 |
| paving slabs | 120 | 25 |
Note: Qhov loj dua qhov sib sau ua ke, qhov dej thiab cement ntau dua. Rau cov ntim loj, qhov kev xaiv zoo tshaj yog qhov no: kev npaj ua vaj tse nyob rau hauv lub pob zeb sib tov. Cov proportions zoo sib xws, qhov kev txiav txim ntawm ntxiv cov khoom xyaw yog raws li nram no: dej, ces cement thiab gravel.
