Video: Lub sijhawm teem sijhawm tseem ceeb yog dab tsi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Teem sijhawm yog ib qho tseem ceeb rau lub hom phiaj xws li kev thauj mus los, kev tso thiab muab cov duab uas yuav tsum tau ua kom tiav. Pib teem sijhawm - cov sij hawm thaum lub paste pib poob nws plasticity. Nws yog ib qho tseem ceeb rau kev thauj mus los, tso thiab compaction ntawm cementconcrete.
Ua raws li qhov no hauv kev txiav txim siab, dab tsi yog qhov tseem ceeb ntawm lub sijhawm pib thiab lub sijhawm teem sijhawm kawg?
o Lub sijhawm pib pib xeem yog tseem ceeb rau kev thauj mus los, tso thiab sib cog ntawm cov pob zeb ua ke. o Lub sijhawm pib pib lub sijhawm yuav tsum tau ncua cov txheej txheem ntawm cov dej los yog tawv. o Lub sijhawm teem zaum kawg yog sij hawm thaum lub paste kiag li poob nws splasticity.
Tom qab ntawd, lo lus nug yog, lub sijhawm teem sijhawm yog dab tsi? Kho Sijhawm rau Pob zeb Hauv cov txheej txheem kev lag luam, tag nrho lub zog qhob tau lees paub ntawm 28 hnub. Thaum xya hnub, koj yuav tsum muaj qhob uas kho tau 70% tag nrho lub zog lossis ntau dua tab sis los teb cov lus nug ntawm, Ntev npaum li cas qhob coj mus rau teeb ?” kev teeb tsa lub sijhawm feem ntau yog 24 txog 48 teev.
Tom qab ntawd, ib tus tseem tuaj yeem nug, qhov txiaj ntsig ntawm kev nrhiav lub sijhawm teeb tsa cov cement yog dab tsi?
Pib teem sijhawm ntawm cement yog ib qho tseem ceeb, toknow thaum lub cement yog pib poob nws plasticity. Nws pab tau hauv txiav txim siab tus sij hawm xav tau rau cov txheej txheem concreting, i.e. kev thauj mus los, tso thiab compaction ntawm qhob . Kawg teem sijhawm ntawm cov cement tseem ceeb kom paub thaum twg cement yuav teem.
Dab tsi yog txhais los ntawm kev teeb tsa lub sijhawm pib?
Cov pib teeb tsa lub sijhawm yog lub caij nyoog ntawm kev sib xyaw ntawm cov cement nrog dej thiab cov sij hawm thaum lawv tau poob plasticity. Cov zaum kawg teem caij yog pointat uas tus teeb cement tau txais kev ruaj khov txaus los tiv thaiv qee yam txhais siab.
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