Cov hmoov txhuv nplej siab ether Thicken lub mortar, nce sag resistance, sag resistance thiab rheology ntawm mortar
Piv txwv li, nyob rau hauv kev tsim kho ntawm pobzeb kua nplaum, putty, thiab plastering mortar, tshwj xeeb tshaj yog tam sim no hais tias txhua yam tshuaj tsuag yuav tsum muaj fluidity, piv txwv li, nws yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv gypsum-raws li mortar (tshuab sprayed plaster yuav tsum muaj fluidity tab sis yuav ua rau loj sagging tshwm sim, starch Ether tuaj yeem ua rau qhov tsis xws luag).
Liquidity thiab sag resistance feem ntau contradictory, thiab qhov nce ntawm fluidity yuav ua rau poob ntawm sag resistance. Cov tshuaj khib nyiab nrog cov khoom siv rheological tuaj yeem daws qhov tsis sib haum xeeb tias thaum siv lub zog sab nraud, qhov viscosity txo qis, uas txhim kho kev ua haujlwm thiab lub zog, thiab thaum lub zog sab nraud raug tshem tawm, qhov viscosity nce thiab txhim kho sag kuj.
Rau qhov tam sim no sib txawv ntawm thaj tsam ntawm cov pobzeb, ntxiv cov hmoov txhuv nplej siab ether tuaj yeem txhim kho cov nplaum tiv thaiv ntawm cov nplais nplaum.
2) Txuas sijhawm qhib
Rau cov pobzeb nplaum, nws tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov pobzeb tshwj xeeb nrog lub sijhawm qhib (Class E, txuas ntxiv ntawm 20min mus rau 30min kom ncav cuag 0.5MPa).
ib. Txhim kho qhov ua tau zoo
Cov hmoov txhuv nplej siab ether tuaj yeem ua rau saum npoo ntawm gypsum-based thiab cement mortar smooth, yooj yim rau kev thov, thiab muaj cov nyhuv zoo nkauj. Nws yog ib qho tseem ceeb heev rau plaster-raws li mortars thiab nyias-txheej txheej mortars xws li putty.
b. Lub mechanism ntawm kev txiav txim ntawm starch ether
Thaum cov hmoov txhuv nplej siab ether yaj hauv dej, nws yuav sib npaug sib npaug hauv cov cement mortar system. Vim tias cov hmoov txhuv nplej siab ether molecules muaj cov qauv sib txuas thiab raug them tsis zoo, lawv yuav adsorb zoo them cov cement hais, uas tuaj yeem siv los ua tus choj hloov mus txuas cov cement, yog li muab qhov loj dua tus nqi ntawm cov slurry tuaj yeem txhim kho cov kev tiv thaiv sagging lossis tiv thaiv plam.
Post lub sij hawm: Apr-26-2024