Wet-mixed mortar inoreva cementitious material, yakanaka aggregate, admixture, mvura uye zvakasiyana siyana zvinotemerwa zvinoenderana nekuita. Zvinoenderana nechimwe chikamu, mushure mekuyerwa nekusanganiswa muchiteshi chekusanganisa, inotakurwa kuenda kunzvimbo inoshandiswa nerori yekusanganisa. Chengetedza musanganiswa wedhaka mumudziyo unokosha uye uishandise mukati menguva yakatarwa. Nheyo yekushanda yedhaka rakanyorova rakafanana nekongiri yekutengesa, uye chiteshi chekutengesa kongiri chinosanganisa chinogona panguva imwe chete kugadzira dhaka rakanyorova rakasanganiswa.
1. Zvakanakira dhaka rakanyorova
1) Iyo yakanyorova-yakasanganiswa dhaka inogona kushandiswa zvakananga mushure mekuendeswa kunzvimbo isina kugadziriswa, asi dhaka rinofanira kuchengetwa mumudziyo usina mhepo;
2) Iyo yakanyoro-yakasanganiswa dhaka inogadzirirwa mufekitari yehunyanzvi, iyo inobatsira kuve nechokwadi uye kutonga kunaka kwedhaka;
3) Kusarudzwa kwezvinhu zvakasvibirira zvemvura-yakasanganiswa dhaka yakakura. Iyo yakaunganidzwa inogona kuoma kana kunyorova, uye haidi kuomeswa, saka mutengo unogona kuderedzwa. Uye zvakare, huwandu hukuru hwekugadzira muchina jecha rinogadzirwa neindasitiri tsvina slag senge fly ash uye maindasitiri marara akasimba senge simbi slag uye maindasitiri tailings anogona kusanganiswa, izvo kwete chete kuchengetedza zviwanikwa, asiwo zvinoderedza mutengo wedhaka.
4) Nzvimbo yekuvaka ine nzvimbo yakanaka uye kusvibiswa kushoma.
2. Kuipa kwedhaka rakanyorova rakasanganiswa
1) Sezvo dhaka rakasanganiswa rakanyorova rakasanganiswa nemvura muchirimwa chekugadzira chehunyanzvi, uye huwandu hwekutakura hwakakura panguva imwe chete, haigone kudzorwa zviri nyore zvichienderana nekufambira mberi kwekuvaka uye kushandiswa. Pamusoro pezvo, dhaka rakasanganiswa rakanyorova rinoda kuchengetwa mumudziyo usingapindi mhepo mushure mekutakurwa kuenda kunzvimbo yekuvaka, saka dziva redota rinoda kuiswa panzvimbo;
2) Nguva yekufambisa inorambidzwa nemamiriro emigwagwa;
3) Sezvo mvura yakasanganiswa dhaka yakachengetwa panzvimbo yekuvaka kwenguva yakareba, pane zvimwe zvinodiwa zvekushanda, kuisa nguva uye kugadzikana kwebasa rekushanda kwevhu.
Hydroxypropyl methylcellulose inoshandiswa sechinhu chinochengeta mvura uye chinodzoreredza simende dhaka kuita kuti dhaka ripombe. Inoshandiswa sebhainda mukupura plaster, inovandudza kupararira uye inowedzera nguva yekushanda. Iko kuchengetedza kwemvura kuita kwehydroxypropyl methylcellulose HPMC kunodzivirira slurry kubva pakutsemuka nekuda kwekuoma nekukurumidza mushure mekushandisa, uye inowedzera simba mushure mekuoma. Kuchengetwa kwemvura kwakakosha kuita kwehydroxypropyl methylcellulose HPMC, uye zvakare kuita kunocherechedzwa nevazhinji vepamba wet-mix dhaka vanogadzira. Zvinhu zvinokanganisa kuchengetedza kwemvura kwedhaka rakanyorova zvinosanganisira huwandu hweHPMC yakawedzerwa, viscosity yeHPMC, kunaka kwezvimedu, uye tembiricha yenzvimbo yekushandisa.
Mushure mokunge dhaka yakasanganiswa yakanyoroveswa ichiendeswa kunzvimbo yacho, inofanira kuchengetwa mumudziyo usina kuvhara mukati memhepo. Kana ukasarudza chigadziko chesimbi, iyo yekuchengetedza mhedzisiro ndiyo yakanyanya kunaka, asi iyo investimendi yakanyanya, iyo isingakodzeri mukurumbira uye kushandiswa; unogona kushandisa zvidhinha kana mabhuroko kuvaka dziva remadota, wobva washandisa dhaka risingapinde mvura (mvura yekunyudza mwero isingasviki 5%) kuisa pasi, uye mari yacho ndiyo yakaderera. Zvisinei, kupurasitwa kwedhaka risina mvura kwakakosha zvikuru, uye kunaka kwekuvakwa kwekupurasita mvura kunofanirwa kuve nechokwadi. Zvakanakisisa kuwedzera hydroxypropyl methylcellulose HPMC zvinhu mudhaka kuderedza kutsemuka kwedhaka. Pasi pedziva redota panofanira kuva neimwe nzvimbo yakatsetseka kuitira kuchenesa kuri nyore. Dziva remadota rinofanira kuva nedenga rine nzvimbo yakakwana kudzivirira kunaya nemvura. Iyo dhaka inochengeterwa mudziva remadota, uye pamusoro pechidziva chedota inofanira kuvharwa zvachose nemucheka wepurasitiki kuti uone kuti dhaka iri munzvimbo yakavharwa.
Basa rakakosha rehydroxypropyl methylcellulose HPMC muvhu-musanganiswa dhaka rinonyanya kuve nemativi matatu, imwe yakanakisa kuchengetedza mvura, imwe isimba pakuenderana uye thixotropy we wet-musanganiswa dhaka, uye chechitatu ndiko kudyidzana nesimende. Kuchengetedzwa kwemvura kweselulosi ether kunoenderana nekutorwa kwemvura kwegadziko layer, kuumbwa kwedhaka, ukobvu hwedhaka redhaka, kudiwa kwemvura kwedhaka, uye nguva yekumisikidzwa kwechinhu chekugadzika. Iyo yakakwirira kujeka kwehydroxypropyl methylcellulose, zviri nani kuchengetedza mvura.
Zvinhu zvinokanganisa kuchengetwa kwemvura yekunyorova-musanganiswa dhaka zvinosanganisira cellulose ether viscosity, kuwedzera huwandu, particle fineness uye tembiricha yekushandisa. Iyo yakakura viscosity ye cellulose ether, zviri nani kuchengetedza mvura kuita. Viscosity yakakosha parameter yeHPMC performance. Pachigadzirwa chimwe chete, mhedzisiro yeviscosity yakayerwa nenzira dzakasiyana zvakasiyana kwazvo, uye mamwe anotopetwa kaviri misiyano. Naizvozvo, kana uchienzanisa viscosity, inofanirwa kuitwa pakati pedzimwe nzira dzekuyedza, kusanganisira tembiricha, rotor, nezvimwe.
Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura. Nekudaro, iyo yakakwira viscosity uye nekukwirira kwema molecular huremu hweHPMC, kuderera kunoenderana mukunyungudika kwayo kuchava nemhedzisiro yakaipa pakusimba uye kuita kwekuvaka kwedhaka. Iyo yakakwirira viscosity, iyo inonyanya kuoneka iyo thickening maitiro padhaka, asi haina kuenzana zvakananga. Iyo yakakwirira iyo viscosity, iyo yakanyanya viscous dhaka rakanyorova richava, ndiko kuti, panguva yekuvaka, inoratidzirwa sekunamatira kune scraper uye yakakwirira kunamatira kune substrate. Asi hazvibatsiri kuwedzera simba rekuumbwa kwevhu rakanyorova pacharo. Panguva yekuvaka, iyo anti-sag performance haisi pachena. Pane zvinopesana, imwe yakagadziridzwa hydroxypropyl methylcellulose ine yepakati uye yakaderera viscosity ine yakanakisa mashandiro mukuvandudza simba rechimiro chedhaka rakanyorova.
Mudhaka rakanyorova-yakasanganiswa, kuwanda kwekuwedzera kweselulosi ether HPMC yakaderera kwazvo, asi inogona kuvandudza zvakanyanya kugadzirwa kwedhaka rakanyorova rakasanganiswa, uye iro rinonyanya kuwedzera rinokanganisa kuita kwekuvaka kwedhaka. Kusarudzwa kunonzwisisika kweiyo chaiyo hydroxypropyl methylcellulose ine simba guru pakuvandudzwa kwekuita kwedhaka rakanyorova rakasanganiswa.
Nguva yekutumira: Kubvumbi-04-2023