Kugadzirwa kwesimbi yepurasita yakagadzirwa nemichina kwakabudirira mumakore achangopfuura. Kupurasita simbi kwakatangawo kubva panzvimbo yechinyakare yekuzvisanganisa kusvika pakugadzira simbi yepurasitiki yakasanganiswa nemvura uye yakasanganiswa nemvura. Kubudirira kwayo uye kugadzikana ndizvo zvinhu zvikuru zvinokurudzira kugadzirwa kwesimbi yepurasita yakagadzirwa nemichina, uye cellulose ether inoshandiswa sesimbi yepurasita. Chinhu chikuru chinowedzera basa. Mukuyedza uku, nekugadzirisa viscosity uye kuchengetedza mvura kwe cellulose ether, uye kuburikidza nekuchinja kwakagadzirwa, mhedzisiro yezviratidziro zvekuyedza zvakaita sehuwandu hwekuchengetedza mvura, kurasikirwa kwe2h consistency, nguva yakavhurika, kuramba kwekusagadzikana, uye kuyerera kwesimbi yepurasita pakuvaka kwemichina zvakadzidzwa. Pakupedzisira, zvakaonekwa kuti cellulose ether ine hunhu hwehuwandu hwekuchengetedza mvura uye hunhu hwakanaka hwekuputira, uye inonyanya kukodzera kuvaka simbi yepurasita yakagadzirwa nemichina, uye zviratidzo zvese zvesimbi yepurasita zvinosangana nezvinodiwa zvenyika.
Mwero wekuchengetedza mvura yedhaka rekupurasita
Mwero wekuchengetedza mvura we plastering mortar uri kuwedzera kana viscosity ye cellulose ether iri kubva pa50,000 kusvika 100,000, uye iri kudzikira kana iri kubva pa100,000 kusvika 200,000, nepo mwero wekuchengetedza mvura we cellulose ether yekupfapfaidza muchina wasvika pamusoro pe93%. Kana mwero wekuchengetedza mvura wemortar wakakwira, mukana wekuti mortar ibude ropa wakaderera. Munguva yekuedza kupfapfaidza nemuchina wekupfapfaidza mortar, zvakaonekwa kuti kana mwero wekuchengetedza mvura we cellulose ether uri pasi pe92%, mortar inokurumidza kubuda ropa mushure mekuiswa kwenguva yakati, uye, pakutanga kwekupfapfaidza, zviri nyore kwazvo kuvharira pombi. Saka, pakugadzirira mortar yekupfapfaidza yakakodzera kuvaka nemashini, tinofanira kusarudza cellulose ether ine mwero wekuchengetedza mvura wakakwira.
Kupurasita dhaka kwemaawa maviri kurasikirwa nekugadzikana
Zvichienderana nezvinodiwa neGB/T25181-2010 “Ready Mixed Mortar”, chinodiwa chekurasikirwa kwemaawa maviri chemortar yakajairika yekuplaster isingasviki 30%. Viscosity ye50,000, 100,000, 150,000, uye 200,000 yakashandiswa mukuyedza kurasikirwa kwemaawa maviri. Zvinogona kuonekwa kuti sezvo viscosity ye cellulose ether ichiwedzera, kukosha kwekurasikirwa kwemaawa maviri kwemortar kuchaderera zvishoma nezvishoma, izvo zvinoratidzawo kuti viscosity ye cellulose ether Kana kukosha kwacho kwakakwira, kugadzikana kwemortar kunowedzera uye kushanda kwemortar kunoderedza delamination kuri nani. Zvisinei, panguva yekupfapfaidza chaiko, zvakaonekwa kuti panguva yekurapwa kwekuyera, nekuti viscosity ye cellulose ether yakanyanya, kubatana pakati pemortar netrowel kuchave kukuru, izvo zvisingakodzeri kuvaka. Saka, kana paine chokwadi chekuti mortar haina kugadzikana uye haiparadzi, viscosity ye cellulose ether yakaderera, zviri nani.
Maawa ekuvhura dhaka rekupurasita
Mushure mekunge plastering mortar yapfapfaidzwa pamadziro, nekuda kwekunyudzwa kwemvura kwemadziro uye kubuda kwehunyoro pamusoro pemortar, mortar ichaumba simba rakati wandei munguva pfupi, izvo zvichakanganisa kuvakwa kwekuenzana kunotevera. Nguva yekuvharira yakaongororwa. Kuwanda kwe viscosity ye cellulose ether kuri pakati pe100,000 kusvika 200,000, nguva yekuiswa haichinji zvakanyanya, uye ine hukama hwakati nechiyero chekuchengetedza mvura, kureva kuti, chiyero chekuchengetedza mvura chakakwira, nguva yekuiswa kwemortar yakareba.
Kuyerera kwedhaka rekupurasita
Kurasikirwa kwemidziyo yekupfapfaidza kune chekuita nekuyerera kwesimbi yekupurasita. Pasi pehuwandu hwakafanana hwemvura nezvinhu, kukwira kwesimbi yekupurasita, kuderera kwekuyerera kwesimbi yekupurasita., zvinoreva kuti kukwira kwesimbi yekupurasita, kuramba kwesimbi yekupurasita uye kupfeka kwesimbi kunowedzera. Saka, pakuvaka simbi yekupurasita nemashini, kuderera kwesimbi yekupurasita nesimbi yekupurasita kuri nani.
Kuramba kudonha kwedhaka rekupurasita
Mushure mekunge plastering mortar yapfapfaidzwa pamadziro, kana sag resistance yemortar isina kunaka, mortar inodonha kana kutotsvedza, zvichikanganisa zvakanyanya kuti mortar isatsvedze, izvo zvichakonzera matambudziko makuru pakuvaka kwacho. Saka, mortar yakanaka inofanira kunge iine thixotropy yakanaka uye sag resistance. Kuedza kwacho kwakawana kuti mushure mekunge cellulose ether ine viscosity ye50,000 ne100,000 yamiswa yakatwasuka, mataira akatsvedza zvakananga pasi, nepo cellulose ether ine viscosity ye150,000 ne200,000 isina kutsvedza. Kona ichiri yakamira yakatwasuka, uye hapana kutsvedza kuchaitika.
Simba repurasita redhaka
Kushandisa 50,000, 100,000, 150,000, 200,000, uye 250,000 cellulose ethers kugadzirira plastering mortar sampuro dzekuvaka nemechanical, zvakaonekwa kuti nekuwedzera kwe cellulose ether viscosity, simba re plastering mortar rinodzikira. Izvi zvinodaro nekuti cellulose ether inoumba high-viscosity solution mumvura, uye huwandu hwakawanda hwema stable air bubbles huchaunzwa panguva yekusanganisa mortar. Mushure mekunge simende yaoma, aya ma bubbles emhepo anoumba huwandu hwakawanda hwema voids, nokudaro zvichideredza simba remortar. Saka, plastering mortar yakakodzera kuvaka nemechanical inofanira kukwanisa kusangana nesimba rinodiwa nedhizaini, uye cellulose ether yakakodzera inofanira kusarudzwa.
Nguva yekutumira: Kurume-15-2023