Cov nyhuv ntawm hydroxypropyl hmoov txhuv nplej siab ether ntawm mortar zog
Hydroxypropyl starch ether (HPS), yog ib qho tseem ceeb ntawm cov hmoov txhuv nplej siab hloov kho, ua lub luag haujlwm tseem ceeb hauv kev siv cov khoom siv hauv tsev, tshwj xeeb tshaj yog mortars, vim nws cov khoom tshwj xeeb. Kev taw qhia ntawm HPS txhim kho tag nrho cov kev ua tau zoo ntawm cov mortar feem ntau los ntawm kev cuam tshuam cov khoom rheological, dej tuav, daim ntawv cog lus lub zog thiab tawg tsis kam ntawm cov mortar.
1. Txhim kho rheological zog
Txhim kho kev tsim kho kev ua haujlwm: HPS tuaj yeem txhim kho kev ua haujlwm ntawm mortar. Txij li thaum HPS molecule muaj zog hydration muaj peev xwm thiab viscosity hloov cov nyhuv, nws muaj peev xwm ua rau mortar tsim ib tug tsim nyog sib xws thaum lub sij hawm sib tov. Qhov no feature ua rau lub mortar yooj yim dua rau kis thiab du, yog li txhim kho kev tsim kho.
Kho viscosity: HPS tuaj yeem hloov cov khoom rheological ntawm mortar, ua rau nws pom cov yam ntxwv shear thinning. Cov cuab yeej no ua rau cov mortar ua kua ntau dua thaum raug kev nyuaj siab (xws li thaum sib xyaw lossis kev tsim kho), thaum tuav ib qho viscosity hauv lub xeev zoo li qub los tiv thaiv sagging thiab sib cais.
2. Txhim kho dej tuav
Kev ncua dej evaporation: HPS tuaj yeem khaws dej tau zoo los ntawm kev tsim cov qauv hauv lub mortar. Cov yam ntxwv no yog qhov tseem ceeb heev rau cov tshuaj tiv thaiv hydration ntawm mortar, tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub lossis qhuav. Kev ncua dej evaporation tuaj yeem txhim kho lub zog thaum ntxov thiab kev sib koom ua ke ntawm mortar.
Txhim kho cov txheej txheem mortar hardening: Cov dej tuav tau zoo tuaj yeem ua rau cov txheej txheem mortar hardening zoo ib yam, txo cov kab nrib pleb uas tshwm sim los ntawm dej ntau dhau, thiab txhim kho qhov tawg ntawm cov khoom tiav.
3. Txhim khu kev sib txuas
Txhim kho qhov adhesion ntawm mortar thiab substrate: HPS tuaj yeem tsim muaj zog lub cev thiab tshuaj adhesion ntawm mortar thiab substrate (xws li phab ntsa lossis hauv pem teb). Qhov no feem ntau yog los ntawm qhov tseeb tias HPS, nyob rau hauv nws lub xeev hydrated, tuaj yeem sau qhov pores hauv microstructure ntawm mortar thiab ua rau thaj chaw sib cuag, yog li txhim kho tag nrho cov kev sib raug zoo.
Txhim kho shear tsis kam: Kev taw qhia ntawm HPS tuaj yeem ua rau cov mortar tsim cov qauv denser tom qab kho thiab txhim kho nws cov shear resistance. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov khoom siv hluav taws xob uas raug kev nyuaj siab, xws li hauv kev kho lossis kev txhim kho, qhov twg lub zog sib txuas ntawm cov mortar yog qhov tseem ceeb hauv kev ua kom muaj kev nyab xeeb ntawm cov qauv.
4. Txhim khu kev ua haujlwm tawg
Txo cov kab nrib pleb: HPS txo qhov kev pheej hmoo ntawm cov kab nrib pleb los ntawm kev txhim kho cov dej tuav ntawm cov mortar thiab txo cov shrinkage los ntawm cov dej evaporation. Tsis tas li ntawd, lub network qauv tsim los ntawm HPS nyob rau hauv mortar kuj pab nqus thiab disperse kev ntxhov siab, ntxiv txo qhov tshwm sim ntawm cov kab nrib pleb.
Txhim kho qhov nyuaj ntawm mortar: Lub xub ntiag ntawm HPS muab cov mortar zoo dua deformation muaj peev xwm thiab tuaj yeem tiv tau zoo dua nrog kev hloov pauv ntawm qhov kub thiab txias ntawm cov khoom me me. Qhov no toughness ua rau lub mortar tsis tshua muaj kev tawg thaum raug rau sab nraud quab yuam, yog li txhim kho lub durability ntawm lub mortar.
5. Lwm yam kev txhim kho
Txhim kho khov-thaw tsis kam: HPS txhim kho qhov ntom thiab sib xws ntawm mortar thiab txo cov porosity hauv cov tshuaj khib, uas muaj txiaj ntsig zoo rau kev txhim kho qhov khov-thaw tsis kam ntawm mortar. Cov cuab yeej no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas tsis tshua muaj kub thiab pab txuas ntxiv kev pab cuam lub neej ntawm cov tshuaj khib hauv cov huab cua txias.
Txhim kho hnav tsis kam: Ua tsaug rau kev txhim kho microstructure ntawm HPS, qhov tawv tawv thiab qhov ntom ntawm cov tshuaj khib tau txhim kho, ua rau nws tuaj yeem pom kev hnav zoo dua. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov screed hauv pem teb uas muaj kev sib txhuam thiab hnav.
Daim ntawv thov ntawm hydroxypropyl starch ether nyob rau hauv mortar zoo heev txhim kho nws cov khoom rheological, dej tuav, daim ntawv cog lus lub zog thiab tawg tsis kam, yog li txhim kho kev tsim kho kev ua tau zoo thiab kav ntev ntawm lub mortar. Hauv kev tsim kho niaj hnub no, kev siv HPS tau dhau los ua ib qho tseem ceeb ntawm kev txhim kho kev ua haujlwm ntawm mortar, uas yog qhov tseem ceeb rau kev txhim kho tag nrho cov khoom zoo thiab lub neej ntawm cov khoom siv hauv tsev.
Post lub sij hawm: Jul-05-2024