Dab tsi yog qhov tseem ceeb ntawm kev teeb tsa lub sijhawm ntawm cov cement?
Dab tsi yog qhov tseem ceeb ntawm kev teeb tsa lub sijhawm ntawm cov cement?

Video: Dab tsi yog qhov tseem ceeb ntawm kev teeb tsa lub sijhawm ntawm cov cement?

Video: Dab tsi yog qhov tseem ceeb ntawm kev teeb tsa lub sijhawm ntawm cov cement?
Video: Kev luam ntawv yog ib yam uas tseem ceeb 2024, Kaum ib hlis
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Teem sijhawm yog tseem ceeb rau lub hom phiaj xws li tuav, thauj, tso thiab muab cov duab xav tau rau pob zeb . Pib teem sijhawm - tus sij hawm thaum paste pib poob nws plasticity. Nws yog tseem ceeb fortransportation, tso thiab compaction ntawm cement pob zeb.

Yog li ntawd, dab tsi yog qhov tseem ceeb ntawm kev txiav txim siab teem sij hawm ntawm cov cement?

o Pib teem sijhawm xeem yog tseem ceeb rau kev thauj mus los, tso thiab compaction ntawm cement qhob. o Pib teem sijhawm lub sijhawm yuav tsum tau ua kom ncua cov txheej txheem dej los yog tawv. o Qhov kawg teem sijhawm yog sij hawm thaum lub paste kiag li poob nws splasticity.

Ib yam li ntawd, thaum twg yuav tsum kho cov pob zeb pib? Hauv ntej, cov curing yuav tsum pib tom qab yam tsawg kawg rau 6 teev (Lub sijhawm teem kawg ntawm cement ) thiab tsis pub tsawg tshaj 24 teev. Yog li ntawd, thaum kev kho pob zeb muaj pib isvaries thiab nyob ntawm seb thaum lub nto ntawm lub pob zeb pib qhuav.

Tsuas yog li ntawd, txhais tau li cas los ntawm kev teeb tsa lub sijhawm ntawm cov cement?

Pib teem sijhawm lub sijhawm yuav tsum tau ua kom ncua cov txheej txheem dej los yog tawv. Kawg teem sijhawm yog sij hawm thaum lub paste kiag li poob nws splasticity. Nws yog sij hawm coj rau cement xibhwb cement pob zeb kom tawv txaus thiab ua kom lub ntsej muag ntawm cov pwm uas nws raug pov.

Dab tsi yog qhov sib xws ntawm cov cement?

Tus qauv sib xws los yog kev sib raug zoo ntawm a cement muab tshuaj yog txhais raws li tus nqi ntawm cov dej (hauv feem pua ntawm qhov hnyav ntawm qhuav cement ) uas tso cai rau vicat plunger nkag mus rau qhov tob ntawm 5 mus rau 7 hli los ntawm hauv qab ntawm vicat pwm.

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