Kusintha kwa hydroxypropyl methyl cellulose pazida zopangira simenti

Hydroxypropyl methyl cellulose

Kukhazikitsa mayeso a nthawi

Kukhazikitsa nthawi ya konkire makamaka zokhudzana ndi kukhazikitsidwa kwa nthawi ya simenti, kukhudzika kwakukulu sikuli kwakukulu, kotero nthawi yoyika matope angagwiritsidwe ntchito m'malo mwa kuphunzira kwa HPMC kwa nthawi ya pansi pa madzi osabalalika konkire, chikoka cha osakaniza chifukwa cha nthawi yoikika ndi chiŵerengero cha madzi-simenti ya matope, zotsatira za mchenga wa simenti, kotero kuti muyese chiŵerengero cha motarcement ndi nthawi ya HP, chikoka cha madzi a HP. matope ayenera kukonzedwa.

HPMC ndi macromolecule liniya dongosolo, ndi hydroxyl gulu pa zinchito gulu, amene akhoza kupanga hydrogen zomangira ndi mamolekyu kusakaniza madzi ndi kuonjezera mamasukidwe akayendedwe a madzi kusakaniza. HPMC yaitali maselo unyolo adzakopa wina ndi mzake, kuti HPMC mamolekyu intertwine ndi mzake kupanga dongosolo maukonde, simenti, kusakaniza madzi atakulungidwa. Chifukwa HPMC imapanga maukonde dongosolo ofanana ndi filimu woonda ndi kuzimata zotsatira za simenti, izo bwino kuteteza evaporation chinyezi mu matope, kulepheretsa kapena kuchepetsa hydration mlingo wa simenti.

Mayeso okhetsa madzi

The madzi magazi chodabwitsa matope n'chimodzimodzi ndi konkire, amene adzachititsa kwambiri aggregate kukhazikikamo, kuchititsa kuwonjezeka madzi-simenti chiŵerengero cha pamwamba wosanjikiza slurry, ndi kupanga pamwamba wosanjikiza slurry ndi shrinkage chachikulu pulasitiki kapena akulimbana mu siteji oyambirira, ndi mphamvu ya pamwamba wosanjikiza slurry ndi ofooka. Kuchokera pakuyesera, zikhoza kuwoneka kuti pamene kuchuluka kwa kusakaniza kuli pamwamba pa 0,5%, palibe chodabwitsa chamadzi. Ichi ndi chifukwa pameneMtengo wa HPMCndi wothira matope, HPMC ali filimu mapangidwe ndi dongosolo maukonde, komanso adsorption wa hydroxyl pa unyolo wautali wa macromolecules, kuti simenti mu matope ndi kusakaniza madzi mawonekedwe flocculation, kuonetsetsa dongosolo khola la matope thupi. Mukawonjezera HPMC mumatope kachiwiri, tinthu tating'onoting'ono tambiri todziyimira tomwe timapangidwa. Izi thovu adzakhala wogawana anagawira mu matope ndi kulepheretsa mafunsidwe a aggregate. HPMC luso luso la zipangizo simenti zochokera ndi zimakhudza kwambiri, nthawi zambiri ntchito kukonzekera monga matope youma, polima matope ndi zina zatsopano simenti zochokera gulu zipangizo, kotero kuti ali bwino madzi posungira, plasticity.