Kuwongolera mphamvu ya hydroxypropyl methyl cellulose pazinthu zopangidwa ndi simenti

Hydroxypropyl methyl cellulose

Kukhazikitsa nthawi yoyesera

Nthawi yokhazikitsira simenti imagwirizana kwambiri ndi nthawi yokhazikitsira simenti, kugwedezeka kwa simenti si kwakukulu, kotero nthawi yokhazikitsira simenti ingagwiritsidwe ntchito m'malo mwa kafukufuku wa HPMC pa nthawi yokhazikitsira simenti yoyenda pansi pa madzi, mphamvu ya kusakaniza chifukwa cha nthawi yokhazikitsira ndi chiŵerengero cha madzi ndi simenti cha simenti, mphamvu ya chiŵerengero cha mchenga wa simenti, kotero kuti tiwone momwe HPMC imakhudzira nthawi yokhazikitsira simenti, chiŵerengero cha madzi ndi simenti ndi mchenga wa simenti ziyenera kukhazikika.

HPMC ndi kapangidwe ka macromolecule linear, komwe kali ndi gulu la hydroxyl pagulu logwira ntchito, lomwe limatha kupanga ma hydrogen bond ndi mamolekyulu amadzi osakanikirana ndikuwonjezera kukhuthala kwa madzi osakanikirana. Maunyolo ataliatali a HPMC amakokana, kotero kuti mamolekyulu a HPMC amalumikizana kuti apange kapangidwe ka netiweki, simenti, madzi osakaniza ophimbidwa. Chifukwa HPMC imapanga kapangidwe ka netiweki kofanana ndi filimu yopyapyala komanso mphamvu ya simenti yokulunga, imaletsa bwino kuuluka kwa chinyezi mu matope, kulepheretsa kapena kuchepetsa kuchuluka kwa madzi m'simenti.

Kuyesa kutaya madzi

Chochitika chotulutsa madzi mu matope chimafanana ndi cha konkriti, chomwe chimayambitsa kukhazikika kwakukulu, kupangitsa kuti chiŵerengero cha madzi ndi simenti cha pamwamba pa matope chiwonjezeke, ndikupangitsa kuti pamwamba pa matope pakhale pulasitiki yocheperako kapena kusweka koyambirira, ndipo mphamvu ya pamwamba pa matope imakhala yofooka. Kuchokera ku kuyesera, zitha kuwoneka kuti pamene kuchuluka kwa kusakaniza kuli pamwamba pa 0.5%, palibe chomwe chimachitika chifukwa cha kutayikira kwa madzi. Izi zili choncho chifukwa pameneHPMCAkasakanikirana mu matope, HPMC imakhala ndi kapangidwe ka filimu ndi kapangidwe ka netiweki, komanso kulowetsedwa kwa hydroxyl pa unyolo wautali wa macromolecules, kotero kuti simenti mu matope ndi madzi osakaniza amapanga kusuntha, kuti zitsimikizire kuti thupi la matope ndi lokhazikika. Pambuyo powonjezera HPMC mu matope kachiwiri, thovu laling'ono lodziyimira palokha lidzapangidwa. Thovu izi zidzagawidwa mofanana mu matope ndikulepheretsa kuyika kwa aggregate. HPMC magwiridwe antchito aukadaulo a zinthu zopangidwa ndi simenti ali ndi mphamvu yayikulu, nthawi zambiri amagwiritsidwa ntchito pokonzekera monga matope ouma, matope a polima ndi zinthu zina zatsopano zopangidwa ndi simenti, kotero kuti imakhala ndi madzi abwino komanso pulasitiki.