Tsim rau masons thiab kev cog lus uas siv lub pob zeb ua vaj tse lossis pob zeb cug.
Ua rau kom qis rau lub sijhawm npaj ua ntej lub pob tshuaj tuag lossis pob zeb ua kev.
Siv tau yooj yim. Ib lub hnab ncua sijhawm ntev li ib teev.
Cov koob tshuaj yuav tau nce rau kev ncua ntev, ntev li 3 teev.
Txhim kho cov tshuaj khib lossis pob zeb ua haujlwm.
Tsis cuam tshuam txog lub zog.
Zoo heev siv rau lub hli kub sov.
Yuav tsis cuam tshuam xim hauv pob zeb.
Tso cai rau lub sijhawm ua haujlwm zoo nkauj.
Yuav muab tau yooj yim khaws cia rau siv raws li xav tau.
Haum rau txhua hom kev ua vaj tse.
Teeb Retarder yog cov hmoov dawb ua kom zoo txheej roj retarder ntim rau kev siv hauv cov khoom ntim ua ntej cug lossis pob zeb ua kev. Nws ua kom qeeb qis rau lub sijhawm teeb tsa yam tsis cuam tshuam rau lub zog compressive. Nws npaj txhij rau kev haus tshuaj ntau ntxiv; tsis muaj premixing yuav tsum. Vim tias Mortar Set Retarder yog dawb, nws yuav tsis cuam tshuam xim hauv pob zeb ua, yog li nws yog qhov zoo tagnrho rau cov ua vaj tsev pob zeb ua haujlwm. Tsis muaj kev tuav tswj tshwj xeeb, kev cia khoom lossis kev thauj mus los yuav tsum tau ua.
