Mu cement mortar ne gypsum-based slurry, hydroxypropyl methylcellulose inonyanya kuita basa rekuchengetedza mvura nekukora, uye inogona kuvandudza zvinobudirira kunamira uye kuramba kudonha kwe slurry.
Zvinhu zvakaita sekupisa kwemhepo, tembiricha uye kumhanya kwekumanikidzwa nemhepo zvinokanganisa mwero wekushanduka kwemvura mumota yesimende uye zvigadzirwa zvakagadzirwa negypsum. Nokudaro, mumwaka yakasiyana, pane misiyano mumhedzisiro yekuchengetedza mvura yezvigadzirwa zvine huwandu hwakafanana hwehydroxypropyl methylcellulose yakawedzerwa. Mukugadzirwa kwacho, mhedzisiro yekuchengetedza mvura yeslurry inogona kugadziriswa nekuwedzera kana kuderedza huwandu hweHPMC yakawedzerwa. Kuchengetwa kwemvura mumamiriro ekupisa kwakanyanya chiratidzo chakakosha chekusiyanisa mhando yehydroxypropyl methylcellulose ether.
Zvigadzirwa zvakanaka zve hydroxypropyl methylcellulose series zvinogona kugadzirisa dambudziko rekuchengetedza mvura pasi pekupisa kwakanyanya. Munguva dzekupisa kwakanyanya, kunyanya munzvimbo dzinopisa uye dzakaoma uye dzakatetepa padivi pezuva, HPMC yepamusoro inodiwa kuti ivandudze kuchengetedza mvura kweslurry. HPMC yepamusoro ine hunhu hwakanaka kwazvo. Mapoka ayo e methoxy ne hydroxypropoxy akagoverwa zvakaenzana pamwe chete ne cellulose molecular chain, izvo zvinogona kuvandudza kugona kwemaatomu eokisijeni ari pa hydroxyl ne ether bonds kubatana nemvura kugadzira hydrogen bonds. , kuitira kuti mvura yakasununguka ive mvura yakasungwa, kuitira kuti inyatsodzora kubuda kwemvura kunokonzerwa nemamiriro ekunze ekupisa kwakanyanya, uye kuwana mvura yakawanda yakachengetwa.
Hydroxypropyl methylcellulose yemhando yepamusoro inogona kuparadzirwa zvakaenzana uye zvinobudirira mumota yesimende uye zvigadzirwa zvakagadzirwa negypsum, uye inoputira zvidimbu zvese zvakasimba, uye inoumba firimu rinonyorovesa, uye hunyoro huri pasi hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye hydration reaction ne inorganic gelling material kuve nechokwadi chekuti chinhu chacho chinosimba uye simba rekumanikidza.
Saka, mukuvaka kwezhizha kunodziya zvakanyanya, kuti mvura irambe ichichengetwa zvakanaka, zvakakosha kuwedzera zvigadzirwa zveHPMC zvemhando yepamusoro muhuwandu hwakakwana zvichienderana nefomura, zvikasadaro, pachava nekushaikwa kwemvura yakakwana, simba shoma, kutsemuka, kuvharika uye kudonha kwemvura kunokonzerwa nematambudziko ekuoma zvakanyanya, asiwo kuwedzera kuoma kwevashandi pakuvaka. Sezvo tembiricha ichidzikira, huwandu hweHPMC hunowedzerwa hunogona kudzikiswa zvishoma nezvishoma, uye mhedzisiro imwechete yekuchengetedza mvura inogona kuwanikwa.
Nguva yekutumira: Kubvumbi-13-2023