Kusintha kwa hydroxypropyl methyl cellulose pazida zopangira simenti

M'zaka zaposachedwa, ndikukula kosalekeza kwaukadaulo wakunja wapakhoma, kupitilirabe kwaukadaulo wopanga hydroxypropyl methyl cellulose, komanso mawonekedwe abwino kwambiri a hydroxypropyl methyl cellulose HPMC palokha, hydroxypropyl methyl cellulose HPMC yakhala ikugwiritsidwa ntchito kwambiri pantchito yomanga.

kukhazikitsa nthawi

Kuyika nthawi ya konkire kumakhudzana makamaka ndi nthawi yoyika simenti, ndipo palimodzi ilibe mphamvu zochepa.Chifukwa chake, nthawi yoyika matope itha kugwiritsidwa ntchito m'malo mwa kafukufuku wokhudzana ndi chikoka cha HPMC pakuyika nthawi ya osakaniza a konkire osamwaza pansi pamadzi.Popeza nthawi yoyika matope imakhudzidwa ndi chiŵerengero cha simenti ya madzi ndi chiŵerengero cha mchenga wa simenti, pofuna kuyesa mphamvu ya HPMC pa nthawi yoyika matope, m'pofunika kukonza chiŵerengero cha simenti yamadzi ndi mchenga wa simenti wa matope.

The experimental anachita limasonyeza kuti Kuwonjezera HPMC ali ndi zotsatira retarding pa matope osakaniza, ndi kuika nthawi matope kumawonjezeka ndi kuchuluka kwa mapadi ether HPMC.Ndi kuchuluka komweko kwa HPMC, nthawi yoyika matope opangidwa pansi pamadzi ndi yayitali kuposa yomwe idapangidwa mumlengalenga.Mukayezedwa m'madzi, nthawi yoyika matope osakanizidwa ndi HPMC ndi 6 ~ 18h pambuyo pake pakukhazikitsa koyamba ndipo 6 ~ 22h pambuyo pake pomaliza komaliza kuposa yachitsanzo chopanda kanthu.Choncho, HPMC ayenera kugwiritsidwa ntchito limodzi ndi oyambirira mphamvu wothandizira.

HPMC ndi polima ndi macromolecular liniya dongosolo, ndi magulu hydroxyl pa magulu zinchito, amene akhoza kupanga zomangira haidrojeni ndi kusakaniza mamolekyu madzi kuonjezera mamasukidwe akayendedwe a kusakaniza madzi.The unyolo yaitali maselo a HPMC adzakopa wina ndi mzake, kupanga mamolekyu HPMC intertwine kupanga dongosolo maukonde, ndi kukulunga simenti ndi kusakaniza madzi.Monga HPMC imapanga dongosolo la maukonde lofanana ndi filimu ndikukulunga simenti, imatha kuteteza kusungunuka kwa madzi mumtondo ndikulepheretsa kapena kuchepetsa kuchuluka kwa simenti.

Kutuluka magazi

Kutuluka magazi kwa matope ndi kofanana ndi konkire, komwe kungayambitse kukhazikika kwakukulu kwamagulu, kuonjezera chiŵerengero cha simenti yamadzi pamwamba pa slurry, kuchititsa kuti slurry ya pamwamba ikhale ndi shrinkage yaikulu ya pulasitiki, kapena ngakhale ming'alu kumayambiriro, ndipo mphamvu ya slurry pamwamba ndi yofooka.

Mlingo ukakhala woposa 0,5%, palibe kutulutsa magazi.Izi ndichifukwa choti HPMC ikasakanizidwa mumatope, HPMC imakhala ndi mawonekedwe opangidwa ndi filimu ndi reticular, komanso ma adsorption a hydroxyl pa unyolo wautali wa macromolecule, zomwe zimapangitsa simenti ndi kusakaniza madzi mumtondo kukhala flocculent, kuonetsetsa dongosolo lokhazikika la matope.HPMC ikawonjezeredwa kumatope, tinthu ting'onoting'ono tambiri todziyimira tokha timapangidwa.Ma thovu awa adzagawidwa mofanana mumatope ndikulepheretsa kuyika kwa magulu.Kuchita kwaukadaulo kwa HPMC kumeneku kumakhudza kwambiri zinthu zopangidwa ndi simenti, ndipo nthawi zambiri amagwiritsidwa ntchito pokonzekera zopangira zatsopano za simenti monga matope owuma ndi matope a polima, kuti azikhala ndi madzi abwino komanso kusunga pulasitiki.

Kufuna madzi kwa matope

Pamene kuchuluka kwa HPMC ndi kochepa kwambiri, kumakhala ndi chikoka chachikulu pa kufunikira kwa madzi amatope.Pokhala kuti kukulitsidwa kwa matope atsopano kumakhala kofanana, kuchuluka kwa HPMC ndi kufunikira kwamadzi kwamatope kumasintha motsatira nthawi inayake, ndipo kufunikira kwamadzi kwamatope kumachepa kaye kenako kumawonjezeka.Pamene HPMC zili zochepa kuposa 0.025%, ndi kuwonjezeka kwa HPMC okhutira, kufunikira kwa madzi a matope amachepetsa pansi pa mlingo wokulirapo womwewo, zomwe zimasonyeza kuti ang'onoang'ono HPMC zili, madzi kuchepetsa zotsatira za matope.Mpweya wolowetsa mpweya wa HPMC umapangitsa kuti matope azikhala ndi tinthu tating'ono tating'ono tomwe timadziyimira tokha, zomwe zimagwira ntchito pakupaka mafuta ndikuwongolera kutulutsa kwamatope.Mlingo ukakhala wamkulu kuposa 0.025%, kufunikira kwamadzi kwamatope kumawonjezeka ndikuwonjezeka kwa mlingo, zomwe zimachitika chifukwa cha kukhulupirika kwapaintaneti ya HPMC, kufupikitsa kusiyana pakati pa flocs pa unyolo wautali wama cell, kukopa ndi kugwirizana, ndi kuchepetsa madzimadzi a matope.Chifukwa chake, digiri yakukulitsa ikakhala yofanana, slurry imawonetsa kuchuluka kwamadzi.