Cov nyhuv ntawm cellulose ether ntawm cov yas dawb shrinkage ntawm mortar

1. Kev tshawb fawb keeb kwm ntawm cov nyhuv ntawmcellulose etherntawm yas tsis shrinkage ntawm mortar

Mortar yog cov khoom siv dav siv hauv kev tsim kho, thiab kev ruaj ntseg ntawm nws qhov kev ua tau zoo muaj qhov cuam tshuam tseem ceeb ntawm cov tsev zoo. Yas dawb shrinkage yog ib qho tshwm sim uas yuav tshwm sim hauv mortar ua ntej hardening, uas yuav ua rau muaj teeb meem xws li cov kab nrib pleb hauv cov mortar, cuam tshuam rau nws cov kav ntev thiab kev zoo nkauj. Cellulose ether, raws li cov khoom siv feem ntau siv hauv mortar, muaj qhov cuam tshuam tseem ceeb ntawm cov yas dawb shrinkage ntawm mortar.

2. Lub hauv paus ntsiab lus ntawm cellulose ether txo cov yas dawb shrinkage ntawm mortar

Cellulose ether muaj kev tuav dej zoo heev. Kev poob dej hauv mortar yog qhov tseem ceeb ua rau cov yas tsis muaj shrinkage. Cov pawg hydroxyl ntawm cov cellulose ether molecules thiab cov pa atoms ntawm ether bonds yuav tsim hydrogen bonds nrog dej molecules, tig dej dawb rau hauv cov dej khi, yog li txo cov dej poob. Piv txwv li, hauv qee qhov kev tshawb fawb, nws tau pom tias nrog kev nce ntawm cellulose ether ntau npaum li cas, cov dej poob hauv mortar txo qis linearly. Zoo liTom ntej: Methyl Hydroxypropyl Cellulose Ether (HPMC), thaum qhov ntau npaum li cas yog 0.1-0.4 (feem ntau), nws tuaj yeem txo cov dej poob ntawm cov cement mortar los ntawm 9-29%.

Cellulose ether txhim kho cov khoom rheological, ntxeem tau network qauv thiab osmotic siab ntawm cov cement tshiab muab tshuaj txhuam, thiab nws cov cuab yeej tsim ua yeeb yaj kiab cuam tshuam cov dej ntws. Cov txheej txheem no sib koom ua ke txo cov kev ntxhov siab uas tsim los ntawm kev hloov pauv ntawm noo noo hauv cov tshuaj khib nyiab, yog li inhibiting yas dawb shrinkage.

3. Cov nyhuv ntawm cellulose ether ntau npaum li cas ntawm cov yas dawb shrinkage ntawm mortar

Cov kev tshawb fawb tau pom tias cov yas dawb shrinkage ntawm cement mortar txo qis linearly nrog qhov nce ntawm cellulose ether ntau npaum. Siv HPMC ua piv txwv, thaum qhov ntau npaum li cas yog 0.1-0.4 (feem ntau), cov yas tsis muaj qhov shrinkage ntawm cov cement mortar tuaj yeem txo los ntawm 30-50%. Qhov no yog vim hais tias raws li qhov ntau npaum li cas, nws cov dej tuav cov nyhuv thiab lwm yam shrinkage inhibition cuam tshuam mus ntxiv.

Txawm li cas los xij, ntau npaum li cas ntawm cellulose ether tsis tuaj yeem nce ntxiv mus tas li. Ntawm qhov tod tes, los ntawm qhov kev xav ntawm kev lag luam, ntau ntxiv yuav ua rau tus nqi nce; Ntawm qhov tod tes, cellulose ether ntau dhau yuav ua rau muaj kev cuam tshuam tsis zoo rau lwm yam khoom ntawm mortar, xws li lub zog ntawm mortar.

4. Qhov tseem ceeb ntawm kev cuam tshuam ntawm cellulose ether ntawm cov yas dawb shrinkage ntawm mortar

Los ntawm qhov kev xav ntawm kev siv engineering, qhov tsim nyog ntxiv ntawm cellulose ether rau mortar tuaj yeem txo cov yas dawb shrinkage, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Qhov no yog qhov tseem ceeb heev rau kev txhim kho cov vaj tsev zoo, tshwj xeeb tshaj yog rau kev txhim kho cov kav ntev ntawm cov qauv xws li phab ntsa.

Hauv qee qhov haujlwm tshwj xeeb nrog cov kev xav tau siab rau mortar zoo, xws li qee lub tsev nyob hauv high-end thiab cov tsev loj loj, los ntawm kev tswj xyuas cov cellulose ether ntawm cov yas dawb shrinkage ntawm mortar, nws tuaj yeem ua kom ntseeg tau tias qhov project ua tau raws li cov qauv zoo. .

5. Tshawb nrhiav kev cia siab

Txawm hais tias muaj qee qhov kev tshawb fawb tau los ntawm kev cuam tshuam ntawm cellulose ether ntawm cov yas dawb shrinkage ntawm mortar, tseem muaj ntau yam uas tuaj yeem tshawb pom hauv qhov tob. Piv txwv li, cov kev cuam tshuam ntawm ntau hom cellulose ethers ntawm cov yas dawb shrinkage ntawm mortar thaum lawv ua ke nrog lwm yam additives.

Nrog rau kev txhim kho txuas ntxiv ntawm kev tsim kho thev naus laus zis, cov kev xav tau rau kev ua haujlwm mortar kuj tseem nce ntxiv. Kev tshawb fawb ntxiv yog xav tau ntawm yuav ua li cas thiaj tswj tau cov ntawv thov ntawm cellulose ether hauv mortar kom ua tiav cov txiaj ntsig zoo tshaj plaws ntawm inhibiting yas dawb shrinkage thaum coj mus rau hauv tus account lwm yam khoom ntawm mortar.