Ib qho ntawm cov khoom siv feem ntau siv hauv cov tshuaj khib nyiab qhuav yog hydroxyethyl cellulose (HEC). HEC yog non-ionic cellulose ether nrog thickening, dej tuav, stabilization, thiab ncua kev kawm ntawv. Nws yog dav siv nyob rau hauv cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv qhuav-mix mortar.
1. Lub luag hauj lwm ntawm HEC nyob rau hauv qhuav-mix mortar
Nyob rau hauv qhuav-mix mortar, HEC tsuas yog ua lub luag haujlwm ntawm kev tuav dej, thickening thiab txhim kho kev tsim kho:
Kev tuav dej: HEC muaj kev tuav dej zoo heev thiab tuaj yeem txo cov dej poob. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov khib nyiab qhuav vim tias nws ua rau lub sijhawm qhib ntawm lub mortar, tso cai rau cov neeg ua haujlwm kho cov mortar rau lub sijhawm ntev thiab txhim kho kev tsim kho. Tsis tas li ntawd, kev tuav dej kuj tseem tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg thiab xyuas kom meej tias cov txheej txheem mortar hardening zoo li qub thiab ruaj khov.
Thickening: Cov nyhuv thickening ntawm HEC muab cov tshuaj viscosity zoo, tso cai rau cov mortar kom zoo dua rau ntawm qhov chaw ntawm lub substrate thaum lub sij hawm tsim, tsis yooj yim rau plam, thiab txhim kho cov uniformity ntawm daim ntawv thov. Cov yam ntxwv no tseem ceeb tshwj xeeb hauv kev tsim kho ntsug thiab tuaj yeem txhim kho kev tsim kho kom zoo ntawm cov mortar.
Txhim kho kev tsim kho kev ua haujlwm: HEC tuaj yeem ua kom qhuav-siv mortar smoother thiab yooj yim rau kev thov, yog li txo qhov nyuaj ntawm kev ua haujlwm. Nws ua rau cov mortar muaj kev sib kis tau zoo thiab adhesion ntawm lub substrate, ua rau kev tsim kho ntau zog-txuag thiab txhim kho kev ua haujlwm. Tsis tas li ntawd, nws tseem tuaj yeem ua rau muaj peev xwm tiv thaiv sagging, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem tuab.
2. HEC xaiv cov qauv
Thaum xaiv HEC, yam xws li nws qhov hnyav molecular, qib ntawm kev hloov pauv thiab solubility yuav tsum raug txiav txim siab, uas yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm mortar:
Molecular Luj: Qhov loj ntawm qhov hnyav molecular cuam tshuam lub peev xwm thickening thiab dej tuav nyhuv ntawm HEC. Feem ntau hais lus, HEC nrog qhov hnyav dua molecular muaj cov nyhuv thickening zoo dua, tab sis qeeb qeeb qeeb; HEC nrog ib tug me me qhov hnyav molecular muaj ib tug ceev dua dissolution tus nqi thiab ib tug me ntsis thickening nyhuv. Yog li ntawd, nws yog ib qho tsim nyog los xaiv qhov hnyav molecular raws li kev tsim kho.
Degree ntawm kev hloov pauv: Lub degree ntawm kev hloov ntawm HEC txiav txim siab nws solubility thiab viscosity stability. Qhov siab dua qhov kev hloov pauv, qhov zoo dua qhov solubility ntawm HEC, tab sis cov viscosity yuav txo; Thaum qhov kev hloov pauv qis, qhov viscosity siab dua, tab sis cov solubility yuav tsis zoo. Feem ntau, HEC nrog rau qib qis ntawm kev hloov pauv yog qhov tsim nyog rau kev siv cov tshuaj khib nyiab qhuav.
Solubility: Lub dissolution tus nqi ntawm HEC cuam tshuam rau lub sij hawm npaj kev tsim kho. Rau cov khib nyiab qhuav, nws yog qhov zoo tshaj plaws los xaiv HEC uas yooj yim rau tawg thiab yaj sai sai los txhim kho qhov yooj yim ntawm kev tsim kho.
3. Kev ceev faj thaum siv HEC
Thaum siv HEC, koj yuav tsum tau them sai sai rau nws cov nyiaj ntxiv thiab kev siv kom ntseeg tau tias cov txiaj ntsig zoo tshaj plaws:
Kev tswj hwm tus nqi ntxiv: Qhov sib ntxiv ntawm HEC feem ntau yog tswj ntawm 0.1% -0.5% ntawm tag nrho qhov hnyav ntawm mortar. Kev sib ntxiv ntau dhau yuav ua rau cov mortar tuab heev thiab cuam tshuam rau kev tsim kho fluidity; tsis txaus ntxiv yuav txo tau cov dej tuav. Yog li ntawd, qhov kev ntsuam xyuas yuav tsum tau ua raws li qhov xav tau tiag tiag los txiav txim siab qhov zoo tshaj qhov ntxiv.
Compatibility nrog rau lwm yam additives: Nyob rau hauv qhuav-mixed mortar, HEC yog feem ntau siv nyob rau hauv ua ke nrog nrog rau lwm yam additives xws li redispersible latex hmoov, cellulose ether, thiab lwm yam. Ua tib zoo saib xyuas cov compatibility ntawm HEC nrog rau lwm cov khoom xyaw kom paub meej tias tsis muaj teeb meem thiab cuam tshuam. cov nyhuv.
Cia tej yam kev mob: HEC yog hygroscopic, nws raug nquahu kom khaws cia rau hauv qhov chaw qhuav thiab tsis txhob tshav ntuj ncaj qha. Nws yuav tsum tau siv sai li sai tau tom qab qhib los tiv thaiv kev ua haujlwm tsis zoo.
4. Kev siv cov nyhuv ntawm HEC
Hauv kev siv tswv yim, HEC tuaj yeem txhim kho kev tsim kho kev ua haujlwm ntawm cov mortar qhuav thiab txhim kho tag nrho cov khoom zoo. Lub thickening thiab dej tuav cov nyhuv ntawm HEC ua rau cov mortar qhuav qhuav muaj adhesion zoo thiab ruaj khov, uas tsis tsuas yog txhim kho kev tsim kho kom zoo, tab sis kuj ua rau lub sijhawm qhib ntawm lub mortar, tso cai rau cov neeg ua haujlwm ua haujlwm ntau dua. Tsis tas li ntawd, HEC tuaj yeem txo qhov tshwm sim ntawm kev tawg ntawm qhov chaw ntawm lub mortar, ua rau cov mortar hardened ntau ruaj thiab zoo nkauj.
5. Kev tiv thaiv ib puag ncig thiab kev lag luam ntawm HEC
HEC yog ib puag ncig tus phooj ywg cellulose derivative uas yog biodegradable thiab environmentally friendly. Tsis tas li ntawd, HEC yog tus nqi nruab nrab thiab tus nqi tsim nyog, ua rau nws tsim nyog rau kev nce qib thiab siv ntau hom kev tsim kho. Kev siv HEC tuaj yeem txo cov dej-cement piv ntawm mortar, yog li txo cov dej haus, uas kuj yog nyob rau hauv txoj kab nrog tam sim no tus qauv ntawm ntsuab ib puag ncig tiv thaiv hauv kev tsim kho kev lag luam.
Daim ntawv thov ntawm HEC hauv cov khib nyiab qhuav tuaj yeem txhim kho kev ua haujlwm ntawm mortar thiab yog ib qho tseem ceeb ntxiv rau hauv kev tsim kho. Nws cov dej tuav tau zoo, thickening thiab kev tsim kho adaptability txhim kho kev tsim kho thiab ua kom zoo dua qub. Xaiv
txoj cai HEC thiab siv nws kom zoo tuaj yeem tsis tsuas yog txhim kho kev tsim kho kom zoo, tab sis kuj ua tau raws li kev tiv thaiv ib puag ncig thiab kev lag luam.
Post lub sij hawm: Nov-01-2024