Ko te Hydroxypropyl methylcellulose (HPMC) he ether cellulose kore-ionic i hangaia mai i te cellulose rauemi polymer taiao ma te raupapa o nga tukanga matū.Ko te Hydroxypropylmethylcellulose (HPMC) he paura ma kore kakara, kore reka, kore-paitini ka taea te rewa ki te wai matao hei hanga i te wairewa puataata.Kei a ia nga ahuatanga o te whakapakeke, te here, te whakamarara, te whakaemulsifying, te hanga kiriata, te whakatārewa, te adsorbing, te gelling, te kaha o te mata, te pupuri i te makuku me te tiaki i te colloid.I roto i te kumete, he mahi nui o te hydroxypropyl methylcellulose ko te pupuri wai, ko te kaha o te moata ki te pupuri i te wai.
1. Te hiranga o te pupuri wai mo te kumete
Ko te kumete he ngoikore te pupuri wai he ngawari ki te whakaheke toto me te wehe i te wa e kawe ana me te rokiroki, ara, ka rewa te wai ki runga, te onepu me te totohu sima ki raro, me whakaoho ano i mua i te whakamahi.Ko te kumete me te kore e mau i te wai, i te wa e pania ana, i te wa e pa ana te kumete kua oti te whakauru ki te poraka, ki te turanga ranei, ko te moata kua oti te whakauru ka uru ki te wai, me te wa ano, ko te mata o waho o ka whakaeto te kumete i te wai ki roto i te hau, ka mate te wai o te moata.Ko te iti o te wai ka pa ki te whakamakuku o te ciment, ka pa ki te whanaketanga noa o te kaha o te kumete, ka iti ake te kaha, ina koa ko te kaha atanga i waenga i te kumete whakapakeke me te paparanga turanga, ka pakaru, ka taka atu i te moata.
2. Ko te tikanga tuku iho mo te whakapai ake i te pupuri wai o te kumete
Ko te otinga tawhito ko te whakamakuku i te turanga, engari kaore e taea te whakarite kia rite te makuku o te turanga.Ko te whainga pai mo te whakamakuku o te kumete ciment i runga i te turanga ko te: ka uru te hua o te hydration ciment ki roto i te turanga me te tukanga o te turanga o te wai e mimiti ana, ka hanga he "hononga matua" whai hua ki te turanga, kia tutuki ai te kaha here e hiahiatia ana.Ko te whakamakuku tika i runga i te mata o te turanga ka nui te mararatanga i roto i te whakauru wai o te turanga na te rerekee o te pāmahana, te wa whakamakuku, me te riterite o te whakamakuku.He iti ake te whakauru wai o te turanga, ka mau tonu te wai i roto i te kumete.I mua i te puta o te whakamakuku ciment, ka uru te wai, e pa ana ki te whakauru o te waiu ciment me nga hua o te wai ki roto i te matrix;he nui te wai o te turanga, ka rere te wai i roto i te kumete ki te turanga.He puhoi te tere o te hekenga o te reo, a ka hangaia he paparanga wai-wai i waenga i te kumete me te matrix, e pa ana ki te kaha here.Na reira, te whakamahi i te tikanga whakamakuku turanga noa e kore anake e taka ki te whakaoti tika i te raruraru o te nui absorption wai o te turanga taiepa, engari ka pā te kaha hononga i waenganui i te kumete me te turanga, hua i roto i te hollowing me te kapiti.
3. He pai te pupuri wai
(1) Ko te mahi pai o te pupuri i te wai ka tuwhera te kumete mo te wa roa, me nga painga o te hanga-nui-a-rohe, te roa o te mahi i roto i te paera, me te ranunga puranga me te whakamahi puranga.
(2) Ko te pai o te pupuri i te wai ka tino whakamakuku te ciment i roto i te kumete, ka pai ake te pai o te mahi honohono o te moata.
(3) He pai te mahi pupuri wai o te kumete, na te mea ka iti ake te kaha o te moata ki te wehewehe me te whakaheke toto, e pai ake ai te mahi me te hanga o te moata.
Wā tuku: Maehe-20-2023