Methylhydroxyethylcellulose (MHEC) yog ib qho khoom siv ntxiv rau hauv cov khoom siv cement xws li mortar thiab concrete. Nws yog ib feem ntawm tsev neeg ntawm cellulose ethers thiab tau rho tawm los ntawm cellulose ntuj los ntawm cov txheej txheem hloov kho tshuaj.
MHEC feem ntau yog siv ua cov khoom ua kom tuab, cov khoom siv khaws dej thiab cov khoom hloov pauv rheology hauv cov khoom siv cement. Nws pab txhim kho kev ua haujlwm thiab kev sib xws ntawm cov cement sib xyaw, ua rau lawv yooj yim dua rau kev tuav thaum lub sijhawm tsim kho. MHEC kuj muaj ntau yam txiaj ntsig ntxiv, suav nrog:
Kev Khaws Dej: MHEC muaj peev xwm khaws dej, uas tiv thaiv kom cov khoom siv cement qhuav ua ntej lub sijhawm. Qhov no muaj txiaj ntsig zoo rau huab cua kub thiab qhuav lossis thaum xav tau sijhawm ua haujlwm ntev.
Kev Sib Txuas Zoo Dua: MHEC ua rau kev sib txuas ntawm cov khoom siv cementitious thiab lwm yam substrates xws li cib, pob zeb lossis pobzeb ua rau muaj kev sib txuas zoo dua thiab txo qhov yuav tshwm sim ntawm kev tawg lossis kev sib cais.
Lub Sijhawm Qhib Ntev: Lub sijhawm qhib yog lub sijhawm uas cov xuab zeb lossis cov nplaum tseem siv tau tom qab kev tsim kho. MHEC tso cai rau lub sijhawm qhib ntev dua, ua rau lub sijhawm ua haujlwm ntev dua thiab ua kom cov khoom zoo dua ua ntej nws khov.
Kev Tiv Thaiv Sag Zoo Dua: Kev tiv thaiv Sag yog hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv kev poob qis lossis sagging thaum siv rau ntawm qhov chaw ntsug. MHEC tuaj yeem txhim kho qhov kev tiv thaiv sag ntawm cov khoom siv cement, ua kom ntseeg tau tias muaj kev sib txuas zoo dua thiab txo qhov deformation.
Txhim kho kev ua haujlwm tau zoo: MHEC hloov kho qhov rheology ntawm cov khoom siv cement, txhim kho lawv cov dej ntws thiab kev nthuav dav. Nws pab ua kom muaj kev sib xyaw du thiab sib xws dua, ua rau nws yooj yim dua rau kev tuav thiab siv.
Lub Sijhawm Teeb Tsa Tswj: MHEC tuaj yeem cuam tshuam rau lub sijhawm teeb tsa ntawm cov khoom siv cement, ua rau muaj kev tswj hwm zoo dua ntawm cov txheej txheem kho. Qhov no muaj txiaj ntsig zoo rau cov xwm txheej uas xav tau lub sijhawm teeb tsa ntev dua lossis luv dua.
Yuav tsum nco ntsoov tias cov yam ntxwv tshwj xeeb thiab kev ua tau zoo ntawm MHEC yuav txawv nyob ntawm nws qhov hnyav molecular, qib kev hloov pauv, thiab lwm yam. Cov chaw tsim khoom sib txawv tuaj yeem muab cov khoom MHEC nrog cov yam ntxwv sib txawv kom haum rau cov ntawv thov tshwj xeeb.
Zuag qhia tag nrho, MHEC yog ib qho khoom siv ntau yam uas tuaj yeem txhim kho kev ua tau zoo thiab kev ua haujlwm ntawm cov khoom siv cement, muab cov txiaj ntsig xws li kev nplaum zoo dua, kev khaws dej, kev tiv thaiv sag thiab tswj lub sijhawm teeb tsa.
Lub sijhawm tshaj tawm: Lub Rau Hli-07-2023