A: Tom qab cov pob zeb tau nchuav lawm, cov slurry tseem tsis tau muaj zog, thiab cov pob zeb hardening nyob ntawm qhov hardening ntawm cov cement. Piv txwv li, lub sij hawm pib ntawm Portland cement zoo tib yam yog 45 feeb, thiab lub sij hawm zaum kawg yog 10 teev, uas yog, cov pob zeb yog poured thiab smoothed thiab muab tso rau ntawd tsis muaj kev cuam tshuam nws, thiab nws yuav maj mam harden tom qab 10 teev. Yog tias koj xav nce qhov kev teeb tsa ntawm cov pob zeb, koj yuav tsum siv lub tshuab hluav taws xob rau chav kho. Koj tuaj yeem pom tau tias tom qab lub pob zeb tau nchuav lawm, nws yuav tsum tau nchuav nrog dej. Qhov no yog vim cov cement yog cov khoom siv hydraulic cementitious, thiab hardening ntawm cov cement yog cuam tshuam nrog kub thiab av noo. Cov txheej txheem ntawm kev tsim kom haum qhov kub thiab av noo rau cov pob zeb kom yooj yim rau nws hydration thiab hardening yog hu ua curing. Lub hauv paus tej yam kev mob rau kev txuag yog kub thiab av noo. Nyob rau hauv qhov kub thiab txias kom zoo, cov hydration ntawm cov cement tuaj yeem ua haujlwm zoo thiab txhawb kev tsim cov pob zeb ua kom muaj zog. Qhov kub ib puag ncig ntawm pob zeb muaj kev cuam tshuam zoo rau kev hydration ntawm cov cement. Qhov kub thiab txias, qhov ceev ntawm hydration npaum li cas, thiab lub zog ntawm cov pob zeb loj hlob sai. Qhov chaw uas cov pob zeb yog watered yog ntub, uas yog zoo rau nws hardening.
Post lub sij hawm: Apr-14-2023
