Kodi hydroxypropyl methylcellulose ndi chiyani mu konkriti ya thovu

Kutalika kocheperako kwa chipika choyesera mu nkhungu pambuyo pa kuumbidwa kukuwonetsa zotsatira za hydroxypropyl methylcellulose pa kukhazikika kwa voliyumu ya konkriti ya thovu. Zitha kuwoneka kuti mlingo wa 0.05% hydroxypropyl methylcellulose ndiye mlingo woyenera, ndipo pamene mlingo wa hydroxypropylmethylcellulose ndi 0.05%, kutalika kwa kuchepetsa kumawonjezeka pang'onopang'ono. Kusanthula kukuwonetsa kuti hydroxypropyl methylcellulose ikakhala yoyenera, imatha kuchepetsa kutsika kwa voliyumu ya thupi lowumitsidwa ndikuwongolera kutsekemera kwa slurry. Panthawi ya kuuma kwa slurry, madzi amatayika mosalekeza. Chithovu chamkati chimakhalanso chokhumudwitsidwa nthawi zonse, ndipo kufupikitsa thupi lolimba ndilosapeŵeka. Izi zimapangitsa kuti voliyumu ya thupi lolimba likhale losakhazikika, ndipo kusakaniza kwa hydroxypropyl methylcellulose sikumangopereka thupi lowuma Sili kokha ndi zotsatira zabwino zosungira madzi, komanso kukhazikika ndikuumitsa chithovu choyamba kupyolera mu makhalidwe a slurry harding ndi hydroxypropyl. methylcellulose filimu kuumitsa nthawi yomweyo, kuti azisewera bwino thovu okhazikika zotsatira ndi kuchepetsa shrinkage woumitsa thupi voliyumu.

Kukhazikika kwa thovu lothandizira

Pamene kuchuluka kwa hydroxypropyl methylcellulose kudakwezedwa mpaka 0.5%, kutsikako kudachepa pang'ono. Deta imasonyeza kuti pamene hydroxypropyl methylcellulose zili zosapitirira 0.05%, kuwonjezera hydroxypropyl methylcellulose akhoza kwambiri kusintha fluidity ndi mamasukidwe akayendedwe a thovu konkire slurry. Pambuyo hydroxypropyl methylcellulose kusungunuka, lonyowa kusintha zotanuka filimu aumbike pakati olimba gawo particles ndi mpweya gawo thovu, amene ali kwambiri yosalala zotsatira pa kusanganikirana ndondomeko. Slurry ndi yaulere komanso yofananira "mpira", yomwe imathandizira bwino kusungunuka kwa slurry yosakanikirana: koma ngati kuchuluka kwa hydroxypropyl methylcellulose kupitilira 0,5%, slurry idzakhala yowoneka bwino kwambiri ndipo madziwo amachepetsedwa kwambiri. Komabe, 0.05% hydroxypropyl methylcellulose sikuti amangotsimikizira kugwa, komanso kukhazikika kwa thovu la mpweya, lomwe ndi loyenera kuwonjezera anthu.