Kufunika kowonjezera ma cellulose kumatope ndi zinthu zopangidwa ndi gypsum

Mumatope a simenti ndi gypsum-based slurry, hydroxypropyl methylcellulose makamaka imagwira ntchito yosungira madzi ndi kukhuthala, ndipo imatha kusintha bwino kumamatira ndi kukana kwa slurry.

Zinthu monga kutentha kwa mpweya, kutentha ndi kuthamanga kwa mphepo zidzakhudza kusinthasintha kwa madzi mumatope a simenti ndi zinthu zopangidwa 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. Kusungirako madzi pansi pa kutentha kwakukulu ndi chizindikiro chofunikira chosiyanitsa khalidwe la hydroxypropyl methylcellulose ether.

Zabwino kwambiri za hydroxypropyl methylcellulose mndandanda zimatha kuthetsa vuto la kusunga madzi kutentha kwambiri. 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 imakhala yabwino kwambiri. Magulu ake a methoxy ndi hydroxypropoxy amagawidwa mofanana pamagulu a cellulose maselo, omwe amatha kupititsa patsogolo luso la maatomu a okosijeni pamagulu a hydroxyl ndi ether kuti agwirizane ndi madzi kuti apange ma hydrogen bond. , kotero kuti madzi aulere amakhala madzi omangika, kuti athe kuwongolera bwino kutuluka kwa madzi chifukwa cha kutentha kwanyengo, ndikukwaniritsa kusunga madzi kwapamwamba.

Apamwamba hydroxypropyl methylcellulose akhoza uniformly ndi mogwira omwazikana mu simenti matope ndi gypsum ofotokoza mankhwala, ndi kukulunga tinthu olimba, ndi kupanga chonyowa filimu, ndi chinyezi m'munsi pang'onopang'ono anamasulidwa kwa nthawi yaitali , ndi hydration reaction ndi inorganic gelling zakuthupi kuonetsetsa mphamvu yolumikizana ndi mphamvu yopondereza ya zinthuzo.

Chifukwa chake, pakumanga kwanyengo yachilimwe yotentha kwambiri, kuti mukwaniritse kusungirako madzi, ndikofunikira kuwonjezera zinthu zamtundu wa HPMC pamlingo wokwanira molingana ndi chilinganizo, apo ayi, padzakhala hydration osakwanira, kuchepetsedwa mphamvu, kusweka, kukumba. ndi kukhetsa chifukwa cha kuyanika kwambiri. mavuto, komanso kuonjezera zovuta zomangamanga ogwira ntchito. Pamene kutentha kumatsika, kuchuluka kwa HPMC komwe kumawonjezeredwa kumatha kuchepetsedwa pang'onopang'ono, ndipo zotsatira zosungira madzi zomwezo zitha kutheka.