HPMC (hydroxypropyl methylcellulose)ndi chosakanizira chanyumba chomwe chimagwiritsidwa ntchito kwambiri ndipo chimagwiritsidwa ntchito kwambiri mumatope a gypsum. Ntchito zake zazikulu ndikupititsa patsogolo ntchito yomanga matope, kukonza kusungika kwamadzi, kukulitsa kumamatira ndikusintha mawonekedwe a matope. Gypsum mortar ndi chinthu chomangira chokhala ndi gypsum monga gawo lalikulu, lomwe nthawi zambiri limagwiritsidwa ntchito popanga zokongoletsera pakhoma ndi padenga.
1. Zotsatira za mlingo wa HPMC pa kusunga madzi kwa matope a gypsum
Kusungirako madzi ndi chimodzi mwazinthu zofunika kwambiri za matope a gypsum, omwe amagwirizana mwachindunji ndi ntchito yomanga komanso mphamvu yomangira matope. HPMC, monga mkulu maselo polima, ali wabwino posungira madzi. Mamolekyu ake ali ndi magulu ambiri a hydroxyl ndi ether. Magulu a hydrophilic awa amatha kupanga zomangira za haidrojeni ndi mamolekyu amadzi kuti achepetse kuphulika kwa madzi. Chifukwa chake, kuwonjezera kuchuluka koyenera kwa HPMC kumatha kukonza bwino kusungidwa kwamadzi kwamatope ndikuletsa matope kuti asawume mwachangu komanso kusweka pamtunda pakumanga.
Kafukufuku wawonetsa kuti pakuwonjezeka kwa mlingo wa HPMC, kusungidwa kwamadzi kwamatope pang'onopang'ono kumawonjezeka. Komabe, mlingo ukakhala wochuluka kwambiri, rheology ya matope ikhoza kukhala yaikulu kwambiri, yomwe imakhudza ntchito yomanga. Chifukwa chake, mulingo woyenera kwambiri wa HPMC uyenera kusinthidwa malinga ndi momwe amagwiritsidwira ntchito.
2. Zotsatira za mlingo wa HPMC pa mphamvu yomangira ya matope a gypsum
Kulimbitsa mphamvu ndi ntchito ina yofunika kwambiri ya matope a gypsum, omwe amakhudza mwachindunji kumamatira pakati pa matope ndi maziko. HPMC, monga mkulu maselo polima, akhoza kusintha kugwirizana ndi kugwirizana ntchito ya matope. Kuchuluka koyenera kwa HPMC kumatha kupititsa patsogolo kulumikizana kwa matope, kuti athe kupanga kumamatira mwamphamvu ndi khoma ndi gawo lapansi pakumanga.
Kafukufuku woyeserera wasonyeza kuti mlingo wa HPMC umakhudza kwambiri mphamvu yomangira ya matope. Pamene mlingo wa HPMC uli mkati mwamtundu wina (nthawi zambiri 0.2% -0.6%), mphamvu yomangirira imasonyeza kukwera. Izi ndichifukwa choti HPMC imatha kukulitsa pulasitiki ya matope, kuti igwirizane bwino ndi gawo lapansi pakumanga ndikuchepetsa kukhetsa ndi kusweka. Komabe, ngati mlingo uli wochuluka kwambiri, matope amatha kukhala ndi madzi ochulukirapo, zomwe zimakhudza kumamatira kwake ku gawo lapansi, motero kuchepetsa mphamvu yomangirira.
3. Mmene HPMC mlingo pa fluidity ndi kamangidwe ka gypsum mortar
Fluidity ndi chizindikiro chofunikira kwambiri pakumanga matope a gypsum, makamaka pakumanga khoma ladera lalikulu. Kuwonjezera HPMC akhoza kwambiri kusintha fluidity wa matope, kukhala kosavuta kumanga ndi ntchito. Makhalidwe a HPMC mamolekyu amathandizira kuti awonjezere kukhuthala kwa matope pokulitsa, potero kuwongolera magwiridwe antchito ndi ntchito yomanga yamatope.
Pamene mlingo wa HPMC uli wochepa, madzi amadzimadzi amatope ndi osauka, zomwe zingayambitse mavuto omanga komanso ngakhale kusweka. Kuchuluka koyenera kwa mlingo wa HPMC (nthawi zambiri pakati pa 0.2% -0.6%) kumatha kupititsa patsogolo kusungunuka kwa matope, kupititsa patsogolo ntchito yake yokutira ndi kuwongolera bwino, motero kumapangitsanso ntchito yomanga. Komabe, ngati mlingowo uli wochuluka kwambiri, madzi amadzimadzi amatope amatha kukhala owoneka bwino kwambiri, ntchito yomangayi imakhala yovuta, ndipo ikhoza kuwononga zinthu.
4. Mmene HPMC mlingo pa kuyanika shrinkage gypsum matope
Kuyanika shrinkage ndi chinthu china chofunikira cha matope a gypsum. Kuchepa kwambiri kungayambitse ming'alu pakhoma. Kuwonjezera kwa HPMC kumatha kuchepetsa kuyanika kwa matope. Kafukufukuyu adapeza kuti kuchuluka koyenera kwa HPMC kumatha kuchepetsa kutuluka kwamadzi mwachangu, potero kumachepetsa vuto lowuma la matope a gypsum. Kuphatikiza apo, mawonekedwe a mamolekyu a HPMC amatha kupanga maukonde okhazikika, kupititsa patsogolo kukana kwa matope.
Komabe, ngati mlingo wa HPMC ndi wokwera kwambiri, ukhoza kuyambitsa matope kuti akhazikike kwa nthawi yayitali, zomwe zimakhudza ntchito yomanga. Panthawi imodzimodziyo, kukhuthala kwapamwamba kungayambitse kugawanika kwa madzi kosagwirizana panthawi yomanga, zomwe zimakhudza kusintha kwa shrinkage.
5. Zotsatira za mlingo wa HPMC pa kukana kwa matope a gypsum mortar
Kukana kwa Crack ndi chizindikiro chofunikira pakuwunika mtundu wa matope a gypsum. HPMC ikhoza kupititsa patsogolo kukana kwake kwa ming'alu mwa kuwongolera mphamvu zopondereza, kumamatira komanso kulimba kwa matope. Powonjezera kuchuluka koyenera kwa HPMC, kukana kwa matope a gypsum kumatha kukonzedwa bwino kuti tipewe ming'alu yoyambitsidwa ndi mphamvu yakunja kapena kusintha kwa kutentha.
Mlingo woyenera wa HPMC nthawi zambiri umakhala pakati pa 0.3% ndi 0.5%, womwe ukhoza kukulitsa kulimba kwa matope ndikuchepetsa ming'alu yomwe imabwera chifukwa cha kusiyana kwa kutentha ndi kuchepa. Komabe, ngati mlingowo uli wochuluka kwambiri, kukhuthala kochuluka kungachititse kuti matopewo azichiza pang'onopang'ono, motero zimakhudza kukana kwake konse kwa ming'alu.
6. Kukhathamiritsa ndi kugwiritsa ntchito moyenera mlingo wa HPMC
Kuchokera pakuwunika kwa zizindikiro zomwe zili pamwambazi, mlingo waMtengo wa HPMCimakhudza kwambiri ntchito ya matope a gypsum. Komabe, mulingo woyenera kwambiri wa mlingo ndi njira yoyenera, ndipo mlingo umalimbikitsidwa kukhala 0.2% mpaka 0.6%. Malo osiyanasiyana omangira ndi zofunikira zogwiritsira ntchito zingafunike kusintha kwa mlingo kuti mukwaniritse ntchito yabwino. Muzochita zothandiza, kuwonjezera pa mlingo wa HPMC, zinthu zina ziyenera kuganiziridwa, monga kuchuluka kwa matope, katundu wa gawo lapansi, ndi zomangamanga.
Mlingo wa HPMC umakhudza kwambiri magwiridwe antchito a matope a gypsum. Kuchuluka koyenera kwa HPMC kumatha kusintha bwino zinthu zofunikira zamatope monga kusunga madzi, mphamvu zomangirira, madzimadzi, komanso kukana ming'alu. Kuwongolera kwa mlingo kuyenera kuganizira mozama zofunikira za ntchito yomanga ndi mphamvu yomaliza ya matope. Wololera HPMC mlingo sangangowonjezera ntchito yomanga matope, komanso kusintha ntchito yayitali yamatope. Chifukwa chake, popanga ndi kumanga kwenikweni, mlingo wa HPMC uyenera kukulitsidwa molingana ndi zosowa zenizeni kuti mukwaniritse bwino.
Nthawi yotumiza: Dec-16-2024