Taw qhia:
Kev ua haujlwm siab admixture rau pob zeb tuaj yeem daws qhov tsis muaj zog ntawm lub zog siab, kev ua haujlwm siab ua vaj tse viscosity, kev tsim kho tsis zoo, yog siv rau kev npaj lub zog siab, kev ua haujlwm siab ua vaj tse zoo tagnrho admixture. Nws tuaj yeem muab sib xyaw nrog ntau yam admixtures rau hauv cov khoom siv sib xyaw ua ke, xws li cov twj tso kua mis, tus neeg saib xyuas lub zog thaum ntxov, tus neeg saib xyuas dej los tiv thaiv dej, tus neeg saib xyuas retarding.
Kev ua qauv
Raws li GB8076-2008 "concrete admixture" txheem
Raws li kev ua haujlwm classification:
Ordinary water reducer: Nyob rau hauv rooj plaub uas cov slump ntawm cov pob zeb yog qhov zoo ib yam, cov dej sib tov tuaj yeem txo. Feem ntau siv dej reducers yog anionic surfactants.
Superplasticizer: Nyob rau hauv cov xwm txheej uas cov slump ntawm pob zeb yog qhov zoo ib yam, nws tuaj yeem txo cov dej ntxiv rau cov khoom sib xyaw.
Scope ntawm kev siv:
Muaj feem xyuam rau txhua yam kev lag luam thiab kev tsim kho vaj tse, kev txuag dej, kev thauj mus los, chaw nres nkoj, kev tsim vaj tsev hauv nroog xws li precast thiab cast-in-site reinforced pob zeb.
Kev ua tau zoo ntawm cov khoom sib xyaw ua ke yog tsim rau lub zog siab, lub zog siab super thiab nruab nrab lub zog pob zeb, thiab yuav tsum muaj zog thaum ntxov, nruab nrab te tiv taus thiab loj fluidity pob zeb.
Cov yam ntxwv ntawm kev ua haujlwm:
1. Tsawg npaum li cas, tus nqi txo dej siab, txo qis dej siab tshaj 35 feem pua, ua rau cov cement muaj zog dispersion nyhuv, txhim kho cov fluidity ntawm cov khoom sib tov, thiab cov pob zeb tawg tuaj yeem ncav cuag 180-250 hli.
2. Lub superplasticizer yeej tsis hloov lub sijhawm teem ntawm pob zeb. Thaum qhov ntau npaum li cas (overdosing), qhov teeb tsa qeeb me ntsis, tab sis nws tsis ncua kev loj hlob ntawm lub zog thaum ntxov ntawm cov pob zeb tawv tawv.
3. Kev ua haujlwm zoo ntawm cov pob zeb ua haujlwm: Txawm tias muaj kev poob qis, cov pob zeb npaj nrog superplasticizer yuav tsis muaj kev sib cais thiab los ntshav, thiab cov tsos thiab xim ntawm cov pob zeb zoo ib yam. Qhov no muaj txiaj ntsig zoo rau kev npaj cov pob zeb ua haujlwm siab, nws tus kheej-leveling pob zeb, nws tus kheej-compacting pob zeb thiab pob zeb ua kom pom tseeb. Thaum siv los tsim cov pob zeb qib siab, cov pob zeb muaj kev ua haujlwm zoo, kev sib koom ua ke zoo thiab sib xyaw yooj yim.
Cim npe nrov: high efficiency admixture rau pob zeb, manufacturers, lwm tus neeg, Hoobkas, nqe
