Hydroxypropyl methylcellulose (HPMC) imagwira ntchito makamaka posunga madzi, kukhuthala ndikuwongolera magwiridwe antchito a zomangamanga mu simenti, gypsum ndi zinthu zina za ufa. Kuchita bwino kwambiri posunga madzi kumatha kuletsa ufa kuti usaume ndi kusweka chifukwa cha kutayika kwa madzi ambiri, ndikupangitsa ufawo kukhala ndi nthawi yayitali yomanga.
Sankhani zinthu zomangira simenti, zomangira, zomangira, zosungira madzi, zomangira, zosinthira magwiridwe antchito a zomangamanga, ndi zina zotero. Mwachitsanzo, matope okhala ndi gypsum amakhala ndi magwiridwe antchito abwino kuposa matope okhala ndi simenti mukakhala wouma, koma magwiridwe antchito ake amachepa mwachangu ngati chinyezi chimayamwa komanso madzi amayamwa. Mphamvu yomangira ya matope opaka pulasitiki iyenera kuchepetsedwa ndi gawo, ndiko kuti, mphamvu yomangira pakati pa gawo loyambira ndi chogwirira ntchito cholumikizira ≥ mphamvu yomangira pakati pa matope okhala ndi gawo loyambira ndi chogwirira ntchito cholumikizira ≥ mgwirizano pakati pa matope okhala ndi gawo loyambira ndi matope okhala ndi gawo loyambira Mphamvu ≥ mphamvu yomangira pakati pa matope okhala ndi gawo loyambira ndi matope okhala ndi gawo loyambira.
Cholinga chabwino kwambiri cha simenti yothira madzi pa maziko ndichakuti simenti yothira madzi imanye madzi pamodzi ndi maziko, kulowa m'munsi, ndikupanga "makiyi olumikizirana" ndi maziko, kuti ikwaniritse mphamvu yolumikizirana yofunikira. Kuthirira mwachindunji pamwamba pa maziko kumayambitsa kufalikira kwakukulu mu kuyamwa kwa madzi pa maziko chifukwa cha kusiyana kwa kutentha, nthawi yothirira, komanso kufanana kwa kuthirira. Pansi pake pali kuyamwa kochepa kwa madzi ndipo ipitiliza kuyamwa madzi mu matope. Madzi a simenti asanapitirire, madzi amayamwa, zomwe zimakhudza kuyamwa kwa simenti ndi kulowa kwa zinthu zothira madzi mu matrix; pansi pake pali kuyamwa kwakukulu kwa madzi, ndipo madzi mu matope amatsikira ku maziko. Liwiro losamuka lapakati ndi lochepa, ndipo ngakhale wosanjikiza wolemera madzi umapangidwa pakati pa matope ndi matrix, zomwe zimakhudzanso mphamvu yolumikizirana. Chifukwa chake, kugwiritsa ntchito njira yodziwika bwino yothirira madzi pa maziko sikungolephera kuthetsa vuto la kuyamwa madzi ambiri pakhoma, komanso kudzakhudza mphamvu yolumikizirana pakati pa matope ndi maziko, zomwe zimapangitsa kuti pakhale mabowo ndi ming'alu.
Zotsatira za ether ya cellulose pa mphamvu yokakamiza ndi yodula ya simenti.
Mukawonjezera cellulose ether, mphamvu zopondereza ndi zodula zimachepa, chifukwa cellulose ether imayamwa madzi ndikuwonjezera porosity.
Kugwira ntchito kwa mgwirizano ndi mphamvu ya mgwirizano zimadalira ngati kulumikizana pakati pa matope ndi zinthu zoyambira kungatheke "kulumikizana kwa makiyi" mokhazikika komanso moyenera kwa nthawi yayitali.
Zinthu zomwe zimakhudza mphamvu ya mgwirizano ndi izi:
1. Makhalidwe a kuyamwa kwa madzi ndi kuuma kwa mawonekedwe a substrate.
2. Mphamvu yosungira madzi, mphamvu yolowera ndi mphamvu ya kapangidwe ka matope.
3. Zida zomangira, njira zomangira ndi malo omangira.
Popeza gawo loyambira la matope limayamwa madzi, gawo loyambira likayamwa madzi mu matope, kupangika kwa matopewo kumachepa, ndipo pazochitika zazikulu, zinthu zolimbitsa simenti mu matopewo sizidzakhala ndi madzi okwanira, zomwe zimapangitsa kuti zikhale zolimba, zapadera. Chifukwa chake ndi chakuti mphamvu yolumikizirana pakati pa matope olimba ndi gawo loyambira imachepa, zomwe zimapangitsa kuti matopewo asweke ndikugwa. Njira yachikhalidwe yothetsera mavutowa ndikuthirira madzi pansi, koma sizingatheke kuonetsetsa kuti mazikowo ndi onyowa mofanana.
Nthawi yotumizira: Meyi-06-2023