Hydroxypropyl methylcellulose (HPMC) inonyanya kuita basa rekuchengetedza mvura, kukora uye kuvandudza mashandiro ekuvaka mu simende, gypsum nezvimwe zvinhu zveupfu. Kushanda zvakanaka kwekuchengetedza mvura kunogona kudzivirira hupfu kuti husaome uye husatsemuke nekuda kwekurasikirwa nemvura yakawanda, uye kuita kuti hupfu huve nenguva yakareba yekuvaka.
Sarudza zvinhu zvinosimbisa simende, maaggregates, maaggregates, zvinhu zvinochengetedza mvura, ma binders, ma construction performance modifiers, nezvimwewo. Semuenzaniso, gypsum-based mortar ine bonding performance iri nani pane cement-based mortar kana yakaoma, asi bonding performance yayo inoderera nekukurumidza kana yave kunyudzwa hunyoro uye yave kunyudzwa mvura. Chinangwa che bonding sturdy ye plastering mortar chinofanira kuderedzwa layer by layer, kureva kuti, bonding strength iri pakati pe base layer ne interface treatment agent ≥ bonding strength iri pakati pe base layer mortar ne interface treatment agent ≥ bonding iri pakati pe base layer mortar ne surface layer mortar Simba ≥ bonding strength iri pakati pe surface mortar ne putty material.
Chinangwa chakanaka chekunyorovesa simende pachigadziko ndechekuti chigadzirwa chekunyorovesa simende chinonwisa mvura pamwe chete nechigadziko, chinopinda muchigadziko, uye chinoita "kubatana kwakakosha" nechigadziko, kuitira kuti uwane simba rekubatanidza rinodiwa. Kudiridza zvakananga pamusoro pechigadziko kunokonzera kupararira kwakanyanya mukunyudzwa kwemvura kwechigadziko nekuda kwekusiyana kwekupisa, nguva yekudiridza, uye kufanana kwekudiridza. Hwaro hune mvura shoma inonwisa uye hucharamba huchinwisa mvura iri mudhaka. Mvura isati yatanga kunyudzwa simende, mvura inonwisa, izvo zvinokanganisa kunyudzwa kwesimende uye kupinda kwezvigadzirwa zvehydration mudhaka; hwaro hune kunyudzwa kukuru kwemvura, uye mvura iri mudhaka inoyerera ichienda kuchigadziko. Kumhanya kwepakati nepakati kunononoka, uye kunyange layer ine mvura yakawanda inoumbwa pakati pedhaka nedhaka, izvo zvinokanganisawo simba rekubatanidza. Naizvozvo, kushandisa nzira yakajairika yekudiridza base hakungogumiri pakugadzirisa dambudziko rekunyudzwa kwemvura yakawanda kwehwaro hwemadziro, asi kuchakanganisa simba rekubatanidza pakati pedhaka nehwaro, zvichikonzera kuvhurika nekutsemuka.
Mhedzisiro ye cellulose ether pakusimba kwesimbi yesimbi inodzvanywa uye inochekwa.
Kana cellulose ether ikawedzerwa, simba rekudzvanya nerekucheka rinoderera, nekuti cellulose ether inonwisa mvura uye inowedzera porosity.
Kushanda kwekubatana uye simba rekubatana zvinoenderana nekuti kubatana pakati pesimbi nechinhu chepasi kunogona here kusimbiswa uye kubudirira "kubatanidza kiyi" kwenguva yakareba.
Zvinhu zvinokanganisa simba rechisungo zvinosanganisira:
1. Hunhu hwekunyudzwa kwemvura uye kuomarara kwenzvimbo inosvikika pasi pevhu.
2. Kugona kuchengetedza mvura, kugona kupinda uye simba rechimiro chedhaka.
3. Zvishandiso zvekuvaka, nzira dzekuvaka uye nzvimbo yekuvaka.
Nekuti hwaro hwepasi hwekuvaka dhaka hune mvura yakaringana, mushure mekunge hwaro hwepasi hwanyudza mvura iri mudhaka, kugona kwedhaka kunenge kwaderera, uye muzviitiko zvakakomba, simende iri mudhaka haizonyungudike zvakakwana, zvichikonzera simba, rakakosha. Chikonzero ndechekuti simba rekubatana pakati pedhaka rakasimba nedhaka repasi rinodzikira, zvichiita kuti dhaka ritsemuke uye ridonhe. Mhinduro yechinyakare yezvinetso izvi ndeyekudiridza hwaro, asi hazvigoneke kuve nechokwadi chekuti hwaro hwakanyoroveswa zvakaenzana.
Nguva yekutumira: Chivabvu-06-2023