Starch ether hauv mortar

Starch ether Ua kom cov mortar tuab, ua rau kom muaj kev tiv thaiv sag, tiv thaiv sag thiab rheology ntawm cov mortar.

Piv txwv li, hauv kev tsim cov nplais nplaum, putty, thiab plastering mortar, tshwj xeeb tshaj yog tam sim no uas kev txau tshuab xav tau kev npliag siab, piv txwv li, nws yog qhov tseem ceeb tshwj xeeb hauv gypsum-based mortar (tshuab txau plaster xav tau kev npliag siab tab sis yuav ua rau muaj kev sagging loj heev, hmoov txhuv nplej siab Ether tuaj yeem ua rau qhov tsis zoo no).

Kev ua kua thiab kev tiv thaiv sag feem ntau yog qhov tsis sib xws, thiab qhov nce ntawm fluidity yuav ua rau muaj kev txo qis ntawm kev tiv thaiv sag. Cov mortar nrog cov khoom rheological tuaj yeem daws qhov kev tsis sib haum xeeb tias thaum lub zog sab nraud siv, qhov viscosity txo qis, uas ua rau kev ua haujlwm thiab kev twj tso kua mis zoo dua, thiab thaum lub zog sab nraud raug rho tawm, qhov viscosity nce thiab txhim kho qhov kev tiv thaiv sag.

Rau qhov sib txawv tam sim no ntawm kev nce thaj chaw vuas, ntxiv cov hmoov txhuv nplej siab ether tuaj yeem txhim kho qhov tsis kam ntawm cov nplaum vuas.

2) Ntxiv sijhawm qhib

Rau cov nplaum pobzeb, nws tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov nplaum pobzeb tshwj xeeb nrog lub sijhawm qhib ntev (Chav Kawm E, txuas ntxiv los ntawm 20 feeb txog 30 feeb kom ncav cuag 0.5MPa).

a. Kev txhim kho kev ua haujlwm ntawm qhov chaw

Cov hmoov txhuv nplej siab ether tuaj yeem ua rau qhov chaw ntawm gypsum-based thiab cement mortar du, yooj yim rau kev thov, thiab muaj cov txiaj ntsig zoo nkauj. Nws yog qhov tseem ceeb heev rau cov plaster-based mortars thiab cov txheej txheem kho kom zoo nkauj xws li putty.

b. Lub mechanism ntawm kev ua haujlwm ntawm cov hmoov txhuv nplej siab ether

Thaum cov hmoov txhuv nplej ether yaj hauv dej, nws yuav sib npaug zos hauv cov cement mortar system. Vim tias cov hmoov txhuv nplej ether molecules muaj cov qauv network thiab muaj cov nqi tsis zoo, lawv yuav nqus cov cement uas muaj cov nqi zoo, uas tuaj yeem siv ua tus choj hloov pauv los txuas cov cement, yog li muab qhov loj dua ntawm cov txiaj ntsig ntawm cov slurry tuaj yeem txhim kho cov nyhuv tiv thaiv kev sagging lossis tiv thaiv kev plam.