Chifukwa chiyani muwonjezere hydroxypropyl methylcellulose (HPMC) kumatope opangidwa ndi gypsum

Mumatope a simenti ndi matope opangidwa ndi gypsum,hydroxypropyl methylcellulosemakamaka amatenga gawo la kusunga madzi ndi thickening, amene angathe bwino kusintha mgwirizano ndi sag kukana slurry.Zinthu monga kutentha kwa mpweya, kutentha ndi kuthamanga kwa mphepo zidzakhudza kuchuluka kwa madzi mumatope a simenti ndi gypsum.Chifukwa chake, munyengo zosiyanasiyana, pali kusiyana kwina pakusunga madzi pazinthu zomwe zili ndi kuchuluka kofanana kwa hydroxypropyl methylcellulose.Pakumanga kwapadera, mphamvu yosungira madzi ya slurry imatha kusinthidwa ndikuwonjezera kapena kuchepetsa kuchuluka kwa HPMC yowonjezeredwa.Kusungidwa kwa madzi kwa methyl cellulose ether pa kutentha kwakukulu ndi chizindikiro chofunikira kusiyanitsa ubwino wa methyl cellulose ether.

Zabwino kwambiri za hydroxypropyl methylcellulose mndandanda zimatha kuthetsa vuto la kusunga madzi pa kutentha kwakukulu.M'nyengo zotentha kwambiri, makamaka m'malo otentha komanso owuma komanso zomangira zowonda kwambiri kumbali yadzuwa, HPMC yapamwamba imafunika kuti ipititse patsogolo kusunga madzi kwa slurry.

HPMC yapamwamba kwambiri, yofanana bwino kwambiri, magulu ake a methoxy ndi hydroxypropoxy amagawidwa mofanana pamagulu a cellulose maselo, omwe amatha kusintha luso la maatomu a okosijeni pa hydroxyl ndi etha kuti agwirizane ndi madzi kuti apange zomangira za haidrojeni , kotero kuti madzi aulere amakhala madzi omangika, kuti athe kuwongolera bwino kutuluka kwa madzi chifukwa cha kutentha kwanyengo ndikukwaniritsa kusungirako madzi ambiri.Madzi amafunikira hydration kuti akhazikitse zida za simenti monga simenti ndi gypsum.Kuchuluka koyenera kwa HPMC kumatha kusunga madzi mumtondo motalika kokwanira kulola kukhazikitsa ndi kuumitsa kupitilira.

Kuchuluka kwa HPMC kofunikira kuti mupeze mphamvu yosungira madzi okwanira kumadalira:

1. The absorbency wa maziko wosanjikiza

2. Kapangidwe ka matope

3. Kukhuthala kwa matope

4. Madzi ofunikira mumatope

5. Nthawi yoyika zinthu za simenti

Apamwamba hydroxypropyl methylcellulose akhoza uniformly ndi mogwira omwazikana mu simenti matope ndi gypsum ofotokoza mankhwala, ndi kukulunga particles onse olimba, ndi kupanga chonyowa filimu, ndi chinyezi m'munsi pang'onopang'ono anamasulidwa kwa nthawi yaitali., ndi mmene hydration zimachitika ndi inorganic cementitious zakuthupi, potero kuonetsetsa kugwirizana mphamvu ndi compressive mphamvu zakuthupi.

chithunzi

Choncho, pomanga chilimwe chotentha kwambiri, kuti akwaniritse zotsatira za kusunga madzi, m'pofunika kuwonjezera mankhwala a HPMC apamwamba kwambiri molingana ndi ndondomekoyi, mwinamwake, padzakhala hydration yosakwanira, kuchepetsa mphamvu, kusweka, kukumba ndi kugwa chifukwa cha kuyanika mwachangu.Zimawonjezeranso zovuta zomanga kwa ogwira ntchito.Pamene kutentha kumachepa, kuwonjezereka kwa HPMC kumatha kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kupezeka.