Dry-mix mortar (DMM) ivhu rekuvaka reupfu rakagadzirwa nekuomesa uye kupwanya simende, gypsum, lime, nezvimwewo sechinhu chikuru chepasi, mushure mekunyatso kurongeka, kuwedzera akasiyana anoshanda ekuwedzera uye mafirita. Iyo ine zvakanakira kusanganisa kuri nyore, kuvaka kuri nyore, uye yakagadzikana mhando, uye inoshandiswa zvakanyanya mukuvaka engineering, yekushongedza engineering uye mamwe minda. Izvo zvakakosha zveiyo yakaoma-musanganiswa dhaka zvinosanganisira base zvinhu, mafirita, admixtures uye additives. Pakati pavo,cellulose ether, sekuwedzera kwakakosha, inoita basa rinokosha mukugadzirisa rheology nekuvandudza kushanda kwekuvaka.
1. Base zvinhu
Nheyo yehwaro ndiyo chikamu chikuru chevhu rakaoma-kusanganisa dhaka, kazhinji rinosanganisira simenti, gypsum, lime, etc. Unhu hwechigadziko hunobata zvakananga kusimba, kunamatira, kusimba uye mamwe maitiro e-dry-mix mortar.
Simende: Ndechimwe chezvinhu zvakajairika zvigadziko mudhaka yakaoma-musanganiswa, kazhinji yakajairwa silicate simende kana yakagadziridzwa simende. Hunhu hwesimende hunosarudza kusimba kwedhaka. Akajairwa chiyero chesimba mamakisi ari 32.5, 42.5, nezvimwe.
Gypsum: inowanzoshandiswa mukugadzira dhaka re plaster uye imwe yakakosha dhaka rekuvaka. Inogona kuburitsa zvirinani coagulation uye kuomesa zvivakwa panguva ye hydration process uye kugadzirisa kushanda kwedhaka.
Lime: inowanzo shandiswa kugadzira mamwe madhaka akakosha, akadai se lime mortar. Kushandiswa kweraimu kunogona kuwedzera kuchengetwa kwemvura kwedhaka uye kunatsiridza chando chayo.
2. Filler
Filler inoreva inorganic poda inoshandiswa kugadzirisa zvinhu zvemuviri zvedhaka, kazhinji inosanganisira jecha rakanaka, quartz poda, yakawedzera perlite, yakawedzera ceramsite, etc. Aya mafirita anowanzo kuwanikwa kuburikidza neaya ekuongorora maitiro ane maunifomu particle size kuve nechokwadi chekuvaka kwedhaka. Basa rekuzadza nderekupa huwandu hwedhaka uye kudzora fluidity uye kunamatira.
Jecha rakanaka: rinowanzo shandiswa mudhaka rakaoma, rine diki diki saizi, kazhinji pazasi 0.5mm.
Quartz poda: kutsetseka kwepamusoro, kwakakodzera kune madhaka anoda simba repamusoro uye kusimba.
Yakawedzerwa perlite/yakawedzera ceramsite: inowanzoshandiswa mumadhaka asingaremi, ane ruzha rwekuvharidzira uye kupisa kwekudzivirira.
3. Misanganiswa
Admixtures zvinhu zvemakemikari zvinovandudza kushanda kwemvura yakaoma-musanganiswa wedhaka, kunyanya kusanganisira kuchengetedza mvura, retarders, accelerators, antifreeze agents, etc. Admixtures inogona kugadzirisa nguva yekuisa, fluidity, kuchengetedza mvura, nezvimwewo zvedhaka, uye kuwedzera kuvandudza kushanda kwekuvaka uye kushandiswa kwekushandisa kwedhaka.
Mvura inochengetedza mvura: inoshandiswa kunatsiridza kuchengetwa kwemvura yedhaka uye kudzivirira mvura kubva pakunyungudika nekukurumidza, nekudaro ichiwedzera nguva yekuvaka yedhaka, iyo yakakosha zvikuru, kunyanya mukupisa kwakanyanya kana nharaunda yakaoma. Zvakajairwa kuchengetedza mvura zvinosanganisira mapolymers.
Retarders: inogona kunonoka kuseta nguva yedhaka, yakakodzera kune yakakwira tembiricha yekuvaka nharaunda kudzivirira dhaka kubva pakuoma nguva isati yakwana panguva yekuvaka.
Accelerators: mhanyisa kuomarara kwedhaka, kunyanya munzvimbo yakaderera tembiricha, inowanzoshandiswa kukurumidza kuita hydration simende uye kuvandudza simba redhaka.
Antifreeze: inoshandiswa munzvimbo yakaderera tembiricha kudzivirira dhaka kubva pakurasikirwa nesimba nekuda kwechando.
4. Zvinowedzera
Zviwedzerwa zvinoreva makemikari kana zvinhu zvakasikwa zvinoshandiswa kuvandudza zvimwe zvinhu zvakananga zvevhu rakaoma-musanganiswa wedhaka, kazhinji kusanganisira cellulose ether, thickener, dispersant, nezvimwewo
Basa re cellulose ether
Cellulose ether ikirasi yemakomisheni epolymer akagadzirwa kubva ku cellulose kuburikidza nekuchinja kwemakemikari, ayo anoshandiswa zvakanyanya mukuvaka, machira, makemikari emazuva ese uye mamwe minda. Mune yakaoma-musanganiswa dhaka, basa re cellulose ether rinonyanya kuratidzwa mune zvinotevera zvinhu:
Kuvandudza kuchengetwa kwemvura kwedhaka
Cellulose ether inogona kunyatso wedzera kuchengetwa kwemvura yedhaka uye kuderedza kukurumidza kubuda kwemvura. Chimiro chayo chema molecular chine hydrophilic mapoka, anogona kuumba simba rakasimba rinosunga nemamorekuru emvura, nekudaro kuchengetedza dhaka rakanyorova uye kudzivirira kutsemuka kana matambudziko ekuvaka anokonzerwa nekukurumidza kurasikirwa kwemvura.
Kuvandudza rheology yematope
Cellulose ether inogona kugadzirisa fluidity uye kunamatira kwedhaka, zvichiita kuti dhaka riwedzere yunifomu uye nyore kushanda panguva yekuvaka. Iyo inowedzera viscosity yedhaka kuburikidza nekukora, inowedzera kupesana kwayo-kuparadzanisa, inodzivirira dhaka kubva pakudonha panguva yekushandiswa, uye inovimbisa kunaka kwekuvaka kwedhaka.
Wedzera kunamatira kwedhaka
Iyo firimu yakaumbwa ne cellulose ether mudhaka ine yakanaka adhesion, iyo inobatsira kuvandudza kusimba kwekubatanidza pakati pedhaka ne substrate, kunyanya mukuvaka maitiro ekuputira uye tileng, inogona zvinobudirira kuvandudza kusungirirwa kwekuita uye kudzivirira kudonha.
Vandudza crack resistance
Kushandiswa kwe cellulose ether kunobatsira kuvandudza kutsemuka kwedhaka, kunyanya mukuomesa, cellulose ether inogona kuderedza kuputika kunokonzerwa nekuderera nekuwedzera kuoma uye kusimba kwesimba redhaka.
Kuvandudza kushanda kwekuvaka kwedhaka
Cellulose etherinogona kunyatsogadzirisa nguva yekuvaka yedhaka, kurebesa nguva yakavhurika, uye kuigonesa kuchengetedza kuita kwakanaka kwekuvaka mukupisa kwakanyanya kana nharaunda yakaoma. Uye zvakare, inogona zvakare kugadzirisa flatness uye operability yedhaka uye kuvandudza kunaka kwekuvaka.
Sechivakwa chekuvaka chinoshanda uye chakasununguka, kunzwisisika kwekuumbwa kwayo uye chikamu chinotarisa kunaka kwekuita kwayo. Sekuwedzera kwakakosha, cellulose ether inogona kuvandudza zvinhu zvakakosha zveyakaoma-musanganiswa dhaka, sekuchengetedza mvura, rheology, uye adhesion, uye inoita basa rakakosha mukuvandudza kuita kwekuvaka uye kunaka kwedhaka. Sezvo indasitiri yekuvaka ichiramba ichiwedzera izvo zvinodiwa pakuita kwezvinhu, kushandiswa kwe cellulose ether uye zvimwe zvinoshanda zvekuwedzera mune yakaoma-musanganiswa dhaka zvichawedzera uye zvakanyanya, zvichipa nzvimbo yakakura yekufambira mberi kwehunyanzvi hweindasitiri.
Nguva yekutumira: Kubvumbi-05-2025