Redispersible latex poda nemamwe mabhainda (sement, slaked lime, gypsum, etc.) uye zvakasiyana-siyana aggregates, fillers uye zvimwe zvinowedzera (zvakadai semethyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic agent, nezvimwewo) kuitira kusanganiswa kwemuviri kugadzira dhaka yakaoma-. Kana iyo yakaoma-yakavhenganiswa dhaka inowedzerwa kumvura uye inokurudzirwa, iyo latex powder particles ichaparadzirwa mumvura pasi pechiito che hydrophilic protective colloid uye mechanical shear. Nguva inodiwa kuti yakajairika redispersible latex poda ipararire ipfupi kwazvo, uye iyi redispersion time index zvakare yakakosha parameter yekuongorora kunaka kwayo. Muchikamu chekutanga chekusanganiswa, latex powder yakatotanga kukanganisa rheology uye kushanda kwevhu.
Nekuda kwehunhu hwakasiyana uye kugadziridzwa kwega yega yakakamurwa latex poda, mhedzisiro iyi zvakare yakasiyana, vamwe vane kuyerera-kunobatsira mhedzisiro, uye vamwe vane inowedzera thixotropy mhedzisiro. Nzira yekushanda kwayo inobva kune zvakawanda, kusanganisira simba re latex powder pakubatana kwemvura panguva yekupararira, kushandiswa kwemaitiro akasiyana-siyana e latex powder mushure mekupararira, simba rekudzivirira colloid, uye simba resimende nemabhandi emvura. Kufurira kunosanganisira kuwedzera kwehuwandu hwemhepo mudhaka uye kugoverwa kwemhepo mabhubhu, pamwe nekufurira kweayo ekuwedzera uye kupindirana nezvimwe zvinowedzera. Naizvozvo, yakasarudzika uye yakakamurwa sarudzo ye redispersible latex poda inzira yakakosha yekukanganisa kunaka kwechigadzirwa. Iyo inonyanya kufarirwa yekuona ndeyekuti iyo redispersible latex poda inowanzo wedzera mhepo yedhaka, nekudaro ichiisa kuvakwa kwedhaka, uye hukama uye viscosity ye latex poda, kunyanya inodzivirira colloid, kumvura kana yaparadzirwa. Zvadaro, dhaka rakanyorova rine latex poda dispersion rinoiswa panzvimbo yebasa. Nekudzikiswa kwemvura pamatanho matatu - kunyura kwechigadziko, kushandiswa kwesimende hydration reaction, uye kuvhuvhuta kwemvura yepamusoro kuenda kumhepo, zvimedu zveresin zvishoma nezvishoma zvinosvika, mainterfaces anobatana zvishoma nezvishoma, uye pakupedzisira anove anoenderera mberi polymer firimu. Izvi zvinonyanya kuitika mumapores evhu uye pamusoro peiyo yakasimba.
Zvinofanira kusimbiswa kuti kuita kuti muitiro uyu usadzoke, ndiko kuti, apo firimu repolymer rinosangana nemvura zvakare, harizoparadzwi zvakare, uye iyo inodzivirira colloid ye redispersible latex powder inofanira kuparadzaniswa kubva kune polymer film system. Iri harisi dambudziko mune alkaline simende mortar system, nekuti ichave saponified nealkali inogadzirwa nesamende hydration, uye panguva imwecheteyo, adsorption yequartz-yakafanana zvinhu ichaiparadzanisa zvishoma nezvishoma kubva muhurongwa, pasina kuchengetedzwa kwe hydrophilicity Colloids, iyo isinganyungudika mumvura uye inoumbwa neamwe-nguva kuparara kwemamiriro ekunze, kwete chete kunonoka kwehupfu hwehupfu, kwete kunonoka kwehupfu hwehupfu. kwenguva refu kunyudzwa kwemvura mamiriro. Mune isiri-alkaline masisitimu, senge gypsum masisitimu kana masisitimu ane mafirita chete, nekuda kwechimwe chikonzero iyo inodzivirira colloid ichiri muchikamu chekupedzisira chepolymer firimu, izvo zvinokanganisa kushomeka kwemvura kwemufirimu, asi nekuti masisitimu aya haashandiswe Muchiitiko chekunyudzwa kwenguva refu mumvura, uye iyo polima ichine yayo yakasarudzika michina, haikanganise kunonoka kushandiswa kweupfu hupfu mune idzi latex poda.
Nekuumbwa kweiyo yekupedzisira polymer firimu, sisitimu inoumbwa neinorganic uye organic binders inoumbwa mudhaka rakaporeswa, kureva kuti, iyo hydraulic material inoumba brittle uye yakaoma furemu, uye redispersible latex poda inoumba firimu pakati pegomba nenzvimbo yakasimba. Flexible connection. Iyi mhando yekubatanidza inogona kufungidzirwa seyakabatanidzwa kune yakaoma skeleton nezvitubu zvidiki zvakawanda. Sezvo kusimba kwekusimba kwepolymer resin firimu inoumbwa nelatex poda kazhinji kurongeka kwehukuru hwepamusoro kupfuura iyo yezvigadzirwa zvehydraulic, kusimba kwedhaka pachayo kunogona kuvandudzwa, ndiko kuti, kubatana kunovandudzwa. Sezvo kushanduka uye kuparara kwepolymer kwakakwirira kudarika iyo yakaomeswa chimiro sesimende, kukanganisa kwedhaka kunovandudzwa, uye mhedzisiro yekuparadzira kushushikana inovandudzwa zvakanyanya, nekudaro inovandudza kutsemuka kupikisa kwedhaka.
Nguva yekutumira: Mar-07-2023