Hydroxypropyl methylcellulose tuaj yeem txhim kho cov khoom tiv thaiv kev tawg ntawm cov cement mortar

Hydroxypropyl methylcellulose (HPMC)yog ib qho tseem ceeb polymer compound siv dav hauv kev tsim kho, tshwj xeeb tshaj yog hauv cement mortar. Nws txhim kho cov khoom tiv thaiv kev tawg ntawm cement mortar nrog nws cov kev ua tau zoo heev, yog li txhim kho kev ua haujlwm ntawm kev tsim kho thiab kev ruaj khov ntawm mortar.

1. Cov khoom tseem ceeb ntawm hydroxypropyl methylcellulose

HPMC yog ib qho cellulose ether uas tsis yog ionic tau los ntawm kev hloov kho cov cellulose ntuj. Nws muaj kev yaj dej zoo, khaws dej thiab lo rau, thiab muaj kev ruaj khov tshuaj lom neeg thiab biocompatibility siab. Hauv cov ntaub ntawv ua los ntawm cement, AnxinCel®HPMC feem ntau txhim kho kev ua tau zoo ntawm cov ntaub ntawv los ntawm kev tswj cov tshuaj tiv thaiv hydration thiab viscosity.

2. Txoj kev txhim kho cov khoom tiv thaiv kev tawg ntawm cov cement mortar

Cov cuab yeej tiv thaiv kev tawg yog hais txog lub peev xwm ntawm cov cement mortar kom tswj tau nws qhov kev ncaj ncees hauv qab dej scouring lossis vibration mob. Tom qab ntxiv HPMC, nws cov txheej txheem ntawm kev txhim kho kev tiv thaiv kev tawg feem ntau suav nrog cov hauv qab no:

2.1. Kev khaws dej kom zoo dua

Cov tshuaj HPMC tuaj yeem tsim cov zaj duab xis hydration rau ntawm qhov chaw ntawm cov cement, uas ua rau txo qhov ceev ntawm cov dej evaporation thiab txhim kho lub peev xwm khaws dej ntawm cov mortar. Kev khaws dej zoo tsis yog tsuas yog txo qhov kev pheej hmoo ntawm kev poob dej thiab tawg ntawm cov mortar, tab sis kuj txo qhov kev tawg ntawm cov khoom me me los ntawm kev poob dej, yog li txhim kho kev tiv thaiv kev tawg.

2.2. Ua kom viscosity ntau ntxiv

Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC yog ua kom cov viscosity ntawm cov mortar nce ntxiv. Cov viscosity siab ua rau cov khoom khov hauv cov mortar sib xyaw ua ke zoo dua, ua rau nws nyuaj rau tawg thaum raug lub zog sab nraud. Cov viscosity ntawm HPMC hloov pauv nrog kev hloov pauv ntawm qhov concentration thiab kub, thiab kev xaiv cov nyiaj ntxiv tsim nyog tuaj yeem ua tiav qhov zoo tshaj plaws.

2.3. Txhim kho thixotropy

HPMC muab cov mortar zoo thixotropy, uas yog, nws muaj viscosity siab hauv lub xeev static, thiab viscosity txo qis thaum raug shear force. Cov yam ntxwv no ua rau cov mortar yooj yim kis thaum lub sijhawm tsim kho, tab sis nws tuaj yeem rov qab viscosity sai sai hauv lub xeev static kom tiv thaiv kev tawg thiab ntws.

2.4. Txhim kho kev ua haujlwm ntawm lub interface

HPMC tau faib sib npaug zos hauv cov mortar, uas tuaj yeem tsim tus choj ntawm cov khoom me me thiab txhim kho lub zog sib txuas ntawm cov khoom me me. Tsis tas li ntawd, qhov ua haujlwm ntawm qhov chaw ntawm HPMC kuj tseem tuaj yeem txo qhov nro ntawm qhov chaw ntawm cov khoom cement, yog li ua kom zoo dua qhov kev ua tau zoo tiv thaiv kev tawg.

3. Cov teebmeem thiab cov txiaj ntsig ntawm daim ntawv thov

Hauv cov haujlwm tiag tiag, cov cement mortar sib xyaw nrog HPMC qhia tau tias muaj kev txhim kho zoo hauv kev ua haujlwm tiv thaiv kev tawg. Cov hauv qab no yog qee qhov zoo ib txwm muaj:

Txhim kho kev tsim kho kom zoo dua: Cov mortar uas muaj zog tiv thaiv kev tawg yooj yim dua rau kev tswj hwm thaum lub sijhawm tsim kho thiab tsis yooj yim sib cais lossis los ntshav.

Txhim kho qhov zoo ntawm qhov chaw: Qhov nplaum ntawm cov mortar ntawm lub hauv paus tau txhim kho, thiab qhov chaw tom qab plastering lossis paving yog smoother.

Txhim kho kev ruaj khov: Txo qhov poob dej hauv cov mortar, txo qhov nce ntawm cov voids los ntawm kev tawg, thiab yog li txhim kho qhov ceev thiab kev ruaj khov ntawm cov mortar.

4. Cov yam cuam tshuam thiab cov tswv yim ua kom zoo dua

Qhov cuam tshuam ntawm kev ntxiv HPMC muaj feem cuam tshuam nrog nws cov koob tshuaj, qhov hnyav molecular thiab cov xwm txheej ib puag ncig. Kev ntxiv HPMC kom tsim nyog tuaj yeem txhim kho kev ua tau zoo ntawm cov mortar, tab sis kev ntxiv ntau dhau tuaj yeem ua rau viscosity ntau dhau thiab cuam tshuam rau kev ua haujlwm ntawm kev tsim kho. Cov tswv yim txhim kho suav nrog:

Xaiv HPMC nrog qhov hnyav molecular thiab qib kev hloov pauv: HPMC nrog qhov hnyav molecular siab dua muab viscosity siab dua, tab sis kev ua tau zoo thiab kev ua haujlwm yuav tsum tau sib npaug raws li cov ntawv thov tshwj xeeb.

Tswj qhov ntau ntxiv kom meej: HPMC feem ntau ntxiv rau hauv qhov ntau ntawm 0.1% -0.5% ntawm qhov hnyav ntawm cov cement, uas yuav tsum tau hloov kho raws li qhov xav tau tiag tiag.

Ua tib zoo saib xyuas qhov chaw tsim kho: Qhov kub thiab av noo muaj feem cuam tshuam rau kev ua haujlwm ntawmHPMC, thiab cov mis yuav tsum tau kho raws li ntau yam xwm txheej kom ua tiav cov txiaj ntsig zoo tshaj plaws.

Kev siv hydroxypropyl methylcellulose hauv cov cement mortar zoo txhim kho cov khoom siv tiv thaiv kev tawg, yog li txhim kho kev ua haujlwm ntawm kev tsim kho thiab lub sijhawm ntev ntawm cov mortar. Los ntawm kev tshawb fawb tob txog cov txheej txheem ntawm kev ua haujlwm ntawm AnxinCel®HPMC thiab kev ua kom zoo dua cov txheej txheem ntxiv, nws cov txiaj ntsig kev ua tau zoo tuaj yeem siv ntxiv los muab cov kev daws teeb meem zoo dua rau cov haujlwm tsim kho.