Dura rinozvienzanisa rinogona kuvimba nehuremu hwaro kuti rigadzire hwaro hwakati sandara, hwakatsetseka uye hwakasimba pachigadziko chekuisa kana kubatanidza zvimwe zvinhu. Panguva imwe chete, rinogona kuita kuvaka kwakakura uye kwakanaka. Naizvozvo, kuyerera kwakanyanya chinhu chakakosha padura rinozvienzanisa. Pamusoro pezvo, rinofanira kunge riine simba rekuchengetedza mvura uye kubatanidza, risina kuparadzanisa mvura, uye rine hunhu hwekudziisa kupisa uye kukwira kwekupisa kwakaderera.
Kazhinji, dhaka rinozvienzanisa rinoda kuyerera kwakanaka, asi kuyerera kwedhaka resimende chaiyo kunowanzova 10-12cm chete; pakatiethers dze cellulose, hydroxypropyl methylcellulose (HPMC) chinhu chikuru chinowedzera muhari yakasanganiswa, kunyangwe huwandu hwekuwedzera huri hwakaderera, hunogona kuvandudza mashandiro ehari, hunogona kuvandudza kugadzikana, mashandiro ekushanda, mashandiro ekubatanidza uye mashandiro ekuchengetedza mvura yehari. Inoita basa rakakosha zvikuru mumunda wehari yakasanganiswa.
1. Kufamba
Hydroxypropyl methylcellulose (HPMC)ine simba guru pakuchengetwa kwemvura, kugara zvakanaka uye kushanda kwekuvaka kwesimbi inodziisa yega. Kunyanya sesimbi inodziisa yega, kuyerera kwemvura ndeimwe yezviratidzo zvikuru zvekuongorora kushanda kwayo. Pachishandiswa pfungwa yekuona kuti simbi inoumbwa zvakanaka, kuyerera kwesimbi kunogona kugadziriswa nekuchinja huwandu hweHPMC. Zvisinei, kana simbi yakawandisa, kuyerera kwesimbi inodzikiswa, saka simbi inodzikiswa muzvikamu zvine mwero.
2. Kuchengetwa kwemvura
Kuchengetwa kwemvura kwedhaka chiratidzo chakakosha chekuyera kugadzikana kwezvikamu zvemukati zvedhaka resimende rakasanganiswa. Kuti iite zvizere maitiro ekunyorovesa kwejeli, huwandu hwakaringana hweHPMC hunogona kuchengetedza hunyoro mudhaka kwenguva yakareba. Kazhinji, mwero wekuchengetedza mvura wedhaka unowedzera nekuwedzera kwehuwandu hweHPMC. Basa rekuchengetedza mvura reHPMC rinogona kudzivirira substrate kuti isatore mvura yakawandisa nekukurumidza, uye kudzivirira kubuda kwemvura, kuitira kuti ive nechokwadi chekuti nharaunda yedhaka inopa mvura yakakwana yekuchenesa simende. Pamusoro pezvo, viscosity yehydroxypropyl methylcellulose inewo simba guru pakuchengetedza mvura kwedhaka. Viscosity yakakwira, kuchengetedza mvura kuri nani. Kazhinji, zvigadzirwa zvine viscosity inosvika 400mpa.s zvinonyanya kushandiswa pakugadzira dhaka rekuzvienzanisa, izvo zvinogona kuvandudza mashandiro edhaka uye kuwedzera kusimba kwedhaka.
3. Kuisa nguva
HPMC ine simba rekudzora simbi padhaka. Nekuwedzera kwemuyero, nguva yekugadzika simbi inorebeswa. Simba rekudzora simbi padhaka resimende rinonyanya kuenderana nehuwandu hwekutsiva ma alkyl groups, uye harina hukama hwakawanda nehuremu hwaro hwemamorekuru. Dhigirii rekutsiva alkyl riri diki, huwandu hwehydroxyl huri kukura, uye simba rekudzora riri pachena. Uye huwandu hweHPMC huri pamusoro, simba redhaka rakaomarara rinoonekwawo pakudzora simbi pakutanga kwemvura, saka simba rekudzora rinoonekwawo zviri pachena.
4. Simba rekuchinjika uye simba rekudzvanya
Kazhinji, simba ndiro rimwe remaindekisi akakosha ekuongorora mashandiro ekugadzira simende yakagadzirwa nesimende pamusanganiswa. Simba rekudzvanya uye simba rekutenderera kwesimbi yedhaka zvinoderera nekuwedzera kwehuwandu hweHPMC.
5. Simba rekubatana
HPMC ine simba guru pakushanda kwekubatanidza kwedhaka.HPMCInogadzira firimu repolymer rine simba rekuvhara pakati pe liquid phase system ne simende hydration particles, izvo zvinosimudzira mvura yakawanda mu polymer film kunze kwe simende particles, izvo zvinoita kuti simende iwane mvura yakakwana, nokudaro zvichivandudza kunaka kwe slurry. Simba re bond rakaomeswa. Panguva imwe chete, kuwedzera huwandu hwakakodzera hwe HPMC kunowedzera plasticity uye flexibility ye mortar, kunoderedza kuomarara kwe transition zone pakati pe mortar ne substrate interface, uye kunoderedza sliding ability pakati pe interfaces. Kusvika padanho rakati, bonding effect pakati pe mortar ne substrate inowedzera. Pamusoro pezvo, nekuda kwekuvapo kwe HPMC mu cement paste, nzvimbo yakakosha ye transition zone uye interface layer zvinoumbwa pakati pe mortar particles nechigadzirwa che hydration. Iyi interface layer inoita kuti interface transition zone ive nyore uye isinganyanyi kuoma. Nokudaro, Mortar ine simba rakasimba re bonding.
Nguva yekutumira: Kubvumbi-25-2024