Hnub Kawg Ua Ntawv Thov: Cuaj Hlis 9, 2024
Dej reducer yog ib qho kev sib xyaw ua ke uas tuaj yeem txo cov dej sib tov thaum tuav cov pob zeb tawg. Feem ntau ntawm lawv yog anionic surfactants. Tom qab ntxiv rau cov pob zeb sib tov, nws muaj cov nyhuv dispersing ntawm cov cement, uas tuaj yeem txhim kho nws cov haujlwm ua haujlwm, txo cov dej siv dej, thiab txhim kho cov kua dej ntawm cov pob zeb sib xyaw; los yog txo cov cement noj thiab txuag cov cement.
Raws li qhov tshwm sim:
Nws tau muab faib ua dej-raws li thiab hmoov-raws li. Cov ntsiab lus ntawm cov dej-raws li feem ntau yog 10%, 20%, 40% (tseem hu ua niam cawv), 50%, thiab cov ntsiab lus ntawm cov hmoov feem ntau yog 98%.
Raws li lub peev xwm los txo cov dej thiab txhim kho lub zog:
Nws tau muab faib ua cov dej zoo tib yam (tseem hu ua plasticizer, nrog cov dej txo qis tsawg dua 8%, sawv cev los ntawm lignin sulfonates), cov dej ua kom muaj txiaj ntsig zoo (tseem hu ua superplasticizer, nrog cov dej txo qis tsis tsawg. ntau dua 14%, suav nrog naphthalene series, melamine series, aminosulfonate series, aliphatic series, thiab lwm yam) thiab cov dej ua haujlwm siab (dej txo qis qis dua 25%, sawv cev los ntawm polycarboxylic acid series dej reducer), thiab muab faib ua hom thaum ntxov zog, hom qauv thiab qeeb teeb hom feem.
Raws li cov ntaub ntawv muaj pes tsawg leeg:
Lignin sulfonates, polycyclic aromatic ntsev, dej-soluble resin sulfonates, naphthalene-raws li high-efficiency dej reducers, aliphatic high-efficiency dej reducers, amino high-efficiency dej reducers, polycarboxylate high-performance dej reducers, thiab lwm yam.
Raws li cov tshuaj muaj pes tsawg leeg:
Lignin sulfonate dej reducers, naphthalene-raws li high-efficiency dej reducers, melamine-raws li high-efficiency dej reducers, aminosulfonate-raws li high-efficiency dej reducers, fatty acid-based high-efficiency dej reducers, polycarboxylate-based high-efficiency dej reducers .
Lub luag haujlwm ntawm dej reducer:
1.Yog tsis hloov qhov piv ntawm ntau yam khoom siv raw (tshwj tsis yog cov cement) thiab lub zog ntawm cov pob zeb, cov cement tuaj yeem txo.
2.Yog tsis hloov qhov sib piv ntawm ntau yam khoom siv raw (tshwj tsis yog dej) thiab cov pob zeb tawg, txo cov dej tuaj yeem txhim kho lub zog ntawm pob zeb.
3.Yog tsis hloov qhov sib piv ntawm ntau yam raw cov ntaub ntawv, rheology thiab plasticity ntawm cov pob zeb yuav ua tau zoo heev, yog li ntawd cov pob zeb kev tsim kho yuav nqa tawm los ntawm lub ntiajteb txawj nqus, twj tso kua mis, tsis muaj kev vibration, thiab lwm yam, kom ceev kev tsim kho thiab txo kev siv zog siv. .
4. Ntxiv cov dej ua kom muaj txiaj ntsig zoo rau cov pob zeb ua kom lub neej ntawm cov pob zeb ua kom muaj zog ntau dua li ob npaug, uas yog, txuas ntxiv lub neej kev pab cuam ntawm lub tsev ntau dua ob npaug.
5.Txo lub shrinkage tus nqi ntawm cov qhob solidification thiab tiv thaiv cov kab nrib pleb hauv cov khoom ua vaj tse; txhim kho Frost tsis kam, uas yog qhov tsim nyog rau kev tsim kho lub caij ntuj no.
Mechanism ntawm kev ua ntawm dej reducer:
· Dispersion
· Lubrication
· Steric hindrance
· Cov nyhuv qeeb ntawm grafted copolymer sab chains
Post lub sij hawm: Sep-09-2024
