HPMC siv rau hauv phab ntsa putty

1. Cov kev qhia tseem ceeb ntawm hydroxypropyl methyl cellulose (HPMC) yog dab tsi?

HPMC Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb txog ob qhov ntsuas no. Kev tuav dej yog feem ntau zoo dua rau cov uas muaj cov ntsiab lus hydroxypropyl siab. High viscosity, dej tuav, kuj (tsis yog qhov tseeb) zoo dua, thiab siab viscosity, zoo dua siv hauv cov cement mortar.

2. Lub luag haujlwm tseem ceeb ntawm kev thov HPMC hauv phab ntsa putty yog dab tsi?

Nyob rau hauv lub phab ntsa putty, HPMC muaj peb lub zog: thickening, dej tuav thiab kev tsim kho.

Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm thiab ua kom cov tshuaj sib xws, thiab tiv thaiv sagging. Kev tuav dej: ua kom cov phab ntsa putty qhuav maj mam, thiab pab cov calcium grey kom hnov ​​​​mob hauv qab dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau phab ntsa putty muaj kev ua haujlwm zoo.

3. Puas yog qhov poob ntawm phab ntsa putty cuam tshuam nrog HPMC?

Kev poob ntawm phab ntsa putty yog feem ntau cuam tshuam rau qhov zoo ntawm cov hmoov tshauv calcium, tab sis tsis yog rau HPMC. Yog tias cov ntsiab lus calcium ntawm tshauv calcium thiab qhov piv ntawm CaO thiab Ca (OH) 2 hauv cov hmoov tshauv calcium tsis tsim nyog, nws yuav ua rau hmoov poob. Yog tias nws muaj qee yam ua rau HPMC, ces HPMC cov dej tsis zoo yuav ua rau cov hmoov poob.

4. Ntau npaum li cas yog hydroxypropyl methyl cellulose (HPMC) nyob rau hauv phab ntsa putty?

Tus nqi ntawm HPMC siv rau hauv daim ntawv thov tiag tiag txawv nyob ntawm qhov kev nyab xeeb, qhov kub thiab txias, cov hmoov tshauv calcium hauv zos, cov mis ntawm phab ntsa putty, thiab "zoo xav tau los ntawm cov neeg siv khoom". Feem ntau hais lus, nruab nrab ntawm 4 kg thiab 5 kg. Piv txwv li: Beijing phab ntsa putty feem ntau yog 5 kg; Guizhou feem ntau yog 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg nyob rau lub caij ntuj no; Yunnan kuj me me, feem ntau 3 kg txog 4 kg thiab hais txog.

5. Dab tsi yog qhov viscosity tsim nyog ntawm hydroxypropyl methyl cellulose (HPMC)?

phab ntsa putty feem ntau yog 100,000, tab sis cov mortar xav tau ntau dua, thiab nws yuav siv 150,000 los ua haujlwm. Ntxiv mus, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog kev tuav dej, ua raws li kev ua kom tuab. Nyob rau hauv phab ntsa putty, tsuav yog dej tuav tau zoo, viscosity qis dua (70-80,000), kuj tseem ua tau, tau kawg, viscosity siab dua, thiab cov txheeb ze dej tuav tau zoo dua. Thaum lub viscosity siab tshaj 100,000, lub viscosity tsis cuam tshuam rau cov dej tuav.

6. Yuav ua li cas xaiv txoj cai hydroxypropyl methylcellulose (HPMC) rau ntau lub hom phiaj?

Daim ntawv thov ntawm phab ntsa putty: qhov yuav tsum tau qis dua, viscosity yog 100,000, nws yog txaus, qhov tseem ceeb yog kom cov dej zoo dua. Daim ntawv thov ntawm mortar: cov kev xav tau siab dua, siab viscosity, zoo dua 150,000, daim ntawv thov cov kua nplaum: cov khoom tawg sai, siab viscosity.

7. Daim ntawv thov ntawm HPMC hauv phab ntsa putty, dab tsi ua rau phab ntsa putty tsim npuas?

HPMC plays peb lub luag haujlwm hauv phab ntsa putty: thickening, dej tuav thiab kev tsim kho. Tsis txhob koom nrog cov tshuaj tiv thaiv. Yog vim li cas rau npuas:

(1) Muab dej ntau dhau.

(2) Cov txheej hauv qab tsis qhuav, thiab lwm txheej yog khawb rau ntawm nws, uas yog ib qho yooj yim ua npuas ncauj.