Abstract:Mhedzisiro yezvakasiyana zvemukati zvehydroxypropyl methylcellulose ether pane zvakajairwa yakaoma-yakasanganiswa plastering mortar yakadzidzwa. Zvigumisiro zvakaratidza kuti: nekuwedzera kwezvinyorwa zve cellulose ether, kuwirirana uye kusimba kwakaderera, uye nguva yekuisa yakaderera. Iyo yekuwedzera, 7d uye 28d yekumanikidza simba yakadzikira, asi kuita kwese kweakaoma-musanganiswa dhaka kwakagadziridzwa.
0.Preface
Muna 2007, makurukota matanhatu nemakomisheni enyika akaburitsa "Chiziviso Chekurambidza Pa-Site Kusanganiswa Kwematope mune Mamwe Maguta mukati meNguva Yenguva". Parizvino, maguta e127 munyika yose akaita basa re "kurambidza iripo" dhaka, iyo yakaunza budiriro isati yamboitika mukugadzirwa kwedhaka rakasanganiswa rakaoma. mukana. Nekusimbaradza kwakasimba kwedhaka rakaoma-musanganiswa mumisika yekuvaka uye yekunze, akasiyana-siyana akasanganiswa edhaka admixtures akapindawo muindastiri iri kubuda, asi mamwe makambani ekugadzira dhaka nekutengesa anowedzeredza nemaune kushanda kwezvigadzirwa zvavo, achitsausa yakaoma- indasitiri yedhaka yakasanganiswa. utano uye kurongeka kukura. Parizvino, senge kongiri yakasanganiswa, yakaoma-yakasanganiswa dhaka admixtures inonyanya kushandiswa musanganiswa, uye mashoma anoshandiswa ega. Kunyanya, kune akawanda emhando dzekusanganisa mune mamwe anoshanda akaoma-akasanganiswa madhaka, asi mune yakajairwa yakaoma-yakavhenganiswa dhaka, hapana chikonzero chekutevera huwandu hwekusanganiswa, asi kutariswa kwakanyanya kunofanirwa kubhadharwa kune kugona kwayo uye kushanda kwayo. dzivisa kushandiswa zvakanyanya kwedhaka admixtures, zvichikonzera tsvina isingakoshi, uye kunyange kukanganisa kunaka kweprojekti. Mune yakajairwa yakaoma-yakasanganiswa dhaka, cellulose ether inoita basa rekuchengetedza mvura, kukora, uye kunatsiridza kwekuita kwekuvaka. Kuita kwakanaka kwekuchengetedza mvura kunovimbisa kuti iyo yakaoma-yakasanganiswa dhaka haizokonzeri jecha, upfu uye kuderedzwa kwesimba nekuda kwekushayikwa kwemvura uye isina kukwana simende hydration; iyo thickening mhedzisiro inowedzera zvakanyanya kusimba kwechimiro chedhaka rakanyorova. Iri bepa rinoitisa chidzidzo chakarongeka pamusoro pekushandiswa kweselulosi ether mune yakajairwa yakaoma-yakavhenganiswa dhaka, iyo ine kutungamira kukosha kwekushandisa zvinosanganiswa zvine musoro mudhaka yakakanyiwa yakaoma-yakasanganiswa.
1. Raw zvinhu uye nzira dzakashandiswa mukuyedzwa
1.1 Raw materials yebvunzo
Simende yaive P. 042.5 simende, iyo nhunzi madota eKirasi II kubva kune magetsi chirimwa muTaiyuan, iyo yakanaka yakaunganidzwa yakaomeswa rwizi jecha rine saizi ye5 mm kana kupfuura, iyo fineness modulus ndeye 2.6, uye cellulose ether ndiyo inotengeswa hydroxypropyl methyl cellulose ether (viscosity 12000 MPa·s).
1.2 Nzira yekuedza
Kugadzirira kwemuenzaniso uye kuyedzwa kwekuita kwakaitwa zvinoenderana neJCJ/T 70-2009 basic performance test nzira yekuvaka dhaka.
2. Chirongwa chekuedza
2.1 Formula yebvunzo
Muyedzo iyi, huwandu hwega hwega hwega hwematani evhu rakaoma-akasanganiswa plastering dhaka rinoshandiswa senzira yekutanga yekuyedzwa, uye mvura ndiyo inoshandiswa mvura ye1 tani yedhaka yakasanganiswa yakaoma.
2.2 Hurongwa chaihwo
Uchishandisa fomula iyi, huwandu hwehydroxypropyl methylcellulose ether yakawedzerwa kune imwe neimwe toni yevhu yakaoma-yakasanganiswa plastering ndeye: 0.0 kg/t, 0.1 kg/t, 0.2 kg/t, 0.3 kg/t, 0.4 kg/tt, 0.6 kg/ t, kudzidza mhedzisiro yemhando dzakasiyana dzehydroxypropyl methylcellulose ether pakuchengetedza mvura, kuwirirana, kuoneka kusimba, nguva yekumisikidza, uye kusimba kwesimba rakajairwa rakaoma-yakavhenganiswa plastering dhaka, kuitira kutungamira yakaoma-yakasanganiswa plastering Kushandiswa kwakaringana kwedhaka zvinosanganiswa kunogona kunyatsoona zvakanakira zveyakaoma-yakasanganiswa dhaka dhizaini yekugadzira, nyore kuvaka, kuchengetedza kwezvakatipoteredza uye kuchengetedza simba.
3. Migumisiro yekuedza uye kuongorora
3.1 Miedzo mhinduro
Mhedzisiro yeakasiyana madosi ehydroxypropyl methylcellulose ether pakuchengetedza mvura, kusimba, kuoneka density, nguva yekumisikidza, uye kumanikidza kusimba kweyakajairika yakaoma-yakasanganiswa plastering dhaka.
3.2 Ongororo yezvabuda
Inogona kuoneka kubva mukuita kweakasiyana madosi ehydroxypropyl methylcellulose ether pakuchengetedza mvura, kusimba, kuoneka density, kuseta nguva, uye kumanikidza kusimba kweyakajairika yakaoma-yakasanganiswa plastering dhaka. Nekuwedzera kwe cellulose ether content, mvura yekuchengetedza mvura yedhaka yakanyorova inowedzerawo zvishoma nezvishoma, kubva ku86.2% apo hydroxypropyl methyl cellulose isina kusanganiswa, kusvika ku0.6% apo hydroxypropyl methyl cellulose inosanganiswa. Nhamba yekuchengetedza mvura inosvika 96.3%, iyo inoratidza kuti mvura yekuchengetedza mvura yepropyl methyl cellulose ether yakanaka kwazvo; kuwirirana kunoderera zvishoma nezvishoma pasi pemvura yekuchengetedza mvura yepropyl methyl cellulose ether (kushandiswa kwemvura patani yedhaka kunoramba kusina kuchinja panguva yekuedza); Density inooneka inoratidza kuderera kwemaitiro, zvichiratidza kuti mvura yekuchengetedza mhedzisiro yepropyl methyl cellulose ether inowedzera kuwanda kwedhaka rakanyorova uye inoderedza density; nguva yekuisa zvishoma nezvishoma inowedzera nekuwedzera kwezvinyorwa zve hydroxypropyl methyl cellulose ether, uye zvinyorwa Painosvika 0.4%, zvinotopfuura kukosha kwakatarwa kwe8h inodiwa nechiyero, zvichiratidza kuti kushandiswa kwakakodzera kwehydroxypropyl methylcellulose ether ine. yakanaka inogadzirisa mhedzisiro pane yekushanda nguva yedhaka rakanyorova; simba rekumanikidza re7d uye 28d radzikira (Iyo yakakura dosage, zvakanyanya kuoneka kuderedzwa). Izvi zvakabatana nekuwedzera kwehuwandu hwedhaka uye kuderera kwehuwandu hunooneka. Kuwedzerwa kwehydroxypropyl methyl cellulose ether kunogona kuumba mhango yakavharwa mukati medhaka rakaoma panguva yekugadzika uye kuoma kwedhaka. Micropores inovandudza kusimba kwedhaka.
4. Chengetedzo yekushandiswa kwe cellulose ether mune yakajairwa yakaoma-yakasanganiswa dhaka
1) Kusarudzwa kwema cellulose ether zvigadzirwa. Kazhinji, iyo yakakura viscosity ye cellulose ether, zviri nani kuchengetedza kwayo mvura, asi iyo yakakwirira viscosity, inoderedza kunyungudika kwayo, izvo zvinokanganisa kusimba nekuvaka kwekuita kwedhaka; kunaka kwe cellulose ether kunenge kwakadzikira mudhaka rakaoma-musanganiswa. Zvinonzi kana yakanyatsonaka, inonyungudika nyore. Pasi pemuyero mumwechete, iyo yakatsetseka yakatsetseka, zviri nani kuchengetedza mvura.
2) Kusarudzwa kwe cellulose ether dosage. Kubva pamhedzisiro yebvunzo uye kuongororwa kwemhedzisiro yezviri mukati me cellulose ether pakuita kweakaoma-musanganiswa plastering dhaka, zvinogona kuoneka kuti iyo yakakwirira yemukati ye cellulose ether, zviri nani, inofanirwa kutariswa kubva mumutengo wekugadzira. Chigadzirwa chemhando, kuita kwekuvaka uye Zvina zvikamu zvenzvimbo yekuvaka kunyatsosarudza dosage yakakodzera. Muyero wehydroxypropyl methyl cellulose ether mune yakajairwa yakaoma-yakasanganiswa dhaka inodiwa 0.1 kg/t-0.3 kg/t, uye mhedzisiro yekuchengeta mvura haigone kuzadzisa zvinodiwa kana huwandu hwehydroxypropyl methyl cellulose ether huchawedzerwa mune diki. Quality tsaona; muyero wehydroxypropyl methyl cellulose ether mudhaka risingapindiri kupurasita rinoita 3 kg/t.
3) Kushandiswa kwe cellulose ether mune yakajairwa yakaoma-yakasanganiswa dhaka. Mukugadzira dhaka rakajairwa rakaoma-yakasanganiswa, huwandu hwakakodzera hwemusanganiswa hunogona kuwedzerwa, pamwe neimwe kuchengetedza kwemvura uye kukora mhedzisiro, kuitira kuti igadzire composite superposition effect ne cellulose ether, kuderedza mutengo wekugadzira, uye kuchengetedza zviwanikwa. ; kana yakashandiswa yoga Kune cellulose ether, simba rekubatanidza harigoni kusangana nezvinodiwa, uye chiyero chakakodzera che redispersible latex powder inogona kuwedzerwa; nekuda kwehuwandu hwakaderera hwekusanganiswa kwedhaka, chikanganiso chekuyera chakakura kana chikashandiswa chega. Hunhu hwezvakaoma-zvakasanganiswa dhaka zvigadzirwa.
5. Mhedziso uye mazano
1) Mune yakajairwa yakaoma-yakasanganiswa plastering dhaka, nekuwedzera kwemukati we hydroxypropyl methylcellulose ether, chiyero chekuchengetedza mvura chinogona kusvika 96.3%, kuwirirana uye kuwanda kunoderedzwa, uye nguva yekumisikidza inowedzera. Simba rekumanikidzika re28d rakaderera, asi kushanda kwese kwevhu rakaoma-musanganiswa rakagadziriswa apo zvinyorwa zve hydroxypropyl methyl cellulose ether zvaive pakati nepakati.
2) Mukugadzira dhaka rakajairwa rakaoma-musanganiswa, cellulose ether ine viscosity yakakodzera uye yakatsetseka inofanira kusarudzwa, uye dosi rayo rinofanirwa kutariswa zvakanyanya kuburikidza nekuyedza. Nekuda kwehuwandu hwakaderera hwekusanganiswa kwedhaka, chikanganiso chekuyera chakakura kana chikashandiswa chega. Inokurudzirwa kuisanganisa nemutakuri kutanga, uye wozowedzera huwandu hwekuwedzera kuti uve nechokwadi chemhando dzakaoma-yakasanganiswa zvigadzirwa zvedhaka.
3) Dry-mixed dhaka iindasitiri iri kusimukira muChina. Mukati mekushandisa dhaka admixtures, hatifanire kutevedzera hupofu huwandu, asi kutarisisa zvakanyanya kunaka uye kuderedza mutengo wekugadzira, kukurudzira kushandiswa kwemarara emaindasitiri, uye kuwana zvechokwadi kuchengetedza kwesimba uye kuderedza kushandiswa.
Nguva yekutumira: Feb-22-2023