Lub ntsiab yam tseem ceeb uas ua rau incompatibility ntawm admixtures thiab cement:

Kev ua tau zoo ntawm cov pob zeb tsis yog tsuas yog nyob ntawm kev ua haujlwm ntawm cov khoom siv, tab sis kuj nyob ntawm kev hloov pauv ntawm cov ntaub ntawv thiab cov qhob sib xyaw ua ke.Admixtures (dej reducers) tsis sib haum nrog cov cement, uas yog, cov khoom sib xyaw ua haujlwm tsis zoo txhim kho kev ua haujlwm ntawm cov cement, qhov poob ntawm cov pob zeb loj dhau los yog cov pob zeb ua kom nrawm heev, thiab txawm tias cov kab nrib pleb yuav tshwm sim ntau dua. nyob rau hauv cov tswv cuab pob zeb.

Raws li qhov thib tsib ntawm cov pob zeb, cov khoom sib xyaw ua ke rau ib qho me me, tab sis nws muaj kev cuam tshuam zoo rau kev ua tau zoo ntawm cov pob zeb, uas tuaj yeem txhim kho qhov poob ntawm cov pob zeb thiab kho lub sij hawm coagulation, yog li txhim kho kev ua tau zoo ntawm kev tsim vaj tse lossis txuag nqi. .Cov tshuaj tiv thaiv dej ntawm cov cement yuav tsum tsawg dua 25% ntawm cov dej ntawm cov cement loj, tab sis thaum cov cement ntsib dej, nws yuav tsim cov qauv flocculation los qhwv cov dej hauv nws.Qhov sib ntxiv ntawm cov khoom sib xyaw tuaj yeem coj cov adsorption rau ntawm qhov chaw ntawm cov cement hais, kom cov cement hais saum npoo muaj tib tus nqi, uas yog sib cais vim cov nyhuv repulsion, yog li tso cov dej qhwv los ntawm cov cement flocculation, yog li ntawd. tias dej ntau tuaj yeem koom nrog hauv cov tshuaj tiv thaiv hydration., txhim kho kev ua si.Qhov loj ntawm qhov adsorption ntawm cov cement particles mus rau admixture thiab poob ntawm cov nyhuv ntawm admixture cuam tshuam qhov adaptability ntawm cov admixture rau cov cement.

Qhov teeb meem ntawm kev tsis sib haum xeeb ntawm cov khoom sib xyaw thiab cov cement yog ib qho teeb meem uas txhawj xeeb thiab mob taub hau rau tag nrho cov lag luam ua vaj tse.Tom qab qhov teeb meem tshwm sim, nws yog qhov kawg liam rau ntawm cov khoom sib xyaw.Qhov tsis sib haum xeeb ntawm cov khoom sib xyaw thiab cov cement yog tshwm sim los ntawm kev sib xyaw nws tus kheej.Cov yam ntxwv ntawm qhov zoo thiab cov tshuaj muaj pes tsawg leeg, tab sis lub ntsiab yog vim li cas feem ntau muaj feem xyuam rau tej yam xws li cov cement thiab admixtures, seb nws yog cov dej-txo cov neeg sawv cev, nylon-based superplasticizer los yog peb tiam polycarboxylic acid-based superplasticizer yuav tshwm sim.