1. Ongororo yezvakamboitika pamhedzisiro yeether ye cellulosepapurasitiki isina kupwanyika kwedhaka
Mortar chinhu chinoshandiswa zvakanyanya mumapurojekiti ekuvaka, uye kugadzikana kwekushanda kwayo kune simba guru pamhando yezvivakwa. Kupwanyika kusina purasitiki chiitiko chinogona kuitika mumortar isati yaoma, izvo zvinozokonzera matambudziko akadai sekutsemuka mumortar, zvichikanganisa kugara kwayo kwenguva refu uye runako rwayo. Cellulose ether, sechinhu chinowanzo shandiswa mumortar, ine simba guru pakuderedza kupwanyika kwemortar isina purasitiki.
2. Nheyo yekuderedza kupwanyika kwepurasitiki isina dhaka ne cellulose ether
Cellulose ether ine mvura yakawanda inochengetedza mvura. Kurasikirwa nemvura mumortar chinhu chakakosha chinotungamira mukupwanyika kwepurasitiki isina ngura. Mapoka ehydroxyl ari pamamorekuru e-cellulose ether uye maatomu eokisijeni ari pamabond ether anozogadzira hydrogen bonds nemamorekuru emvura, zvichishandura mvura isina ngura kuita mvura yakasungwa, nokudaro zvichideredza kurasikirwa nemvura. Semuenzaniso, mune zvimwe zvidzidzo, zvakaonekwa kuti nekuwedzera kwechiyero che cellulose ether, mwero wekurasikirwa nemvura mumortar wakaderera zvakananga. Sezvakaita.methyl hydroxypropyl cellulose ether (HPMC), kana muyero uri 0.1-0.4 (chikamu chikuru), zvinogona kuderedza mwero wekurasikirwa nemvura kwesimbi yesimbi ne9-29%.
Cellulose ether inovandudza hunhu hwerheological, chimiro che network ine maburi uye kumanikidzwa kwe osmotic kwe fresh cement paste, uye hunhu hwayo hwekugadzira firimu hunodzivirira kupararira kwemvura. Iyi nzira dzakatevedzana dzinoderedza kushushikana kunokonzerwa nekuchinja kwehunyoro mumortar, nokudaro zvichidzivirira kuputika kwepurasitiki isina kuchena.
3. Mhedzisiro yekushandiswa kwe cellulose ether pakuderedza dhaka nepurasitiki
Ongororo dzakaratidza kuti kupwanyika kwepurasitiki isina simende kunoderera zvakanangana nekuwedzera kwechiyero che cellulose ether. Tichitora HPMC semuenzaniso, kana chiyero chiri 0.1-0.4 (chikamu chikuru), kupwanyika kwepurasitiki isina simende kunogona kuderedzwa ne30-50%. Izvi zvinodaro nekuti sezvo chiyero chichiwedzera, simba rayo rekuchengetedza mvura uye zvimwe zvinodzivisa kupwanyika zvinoramba zvichiwedzera.
Zvisinei, chiyero che cellulose ether hachigone kuwedzerwa nekusingaperi. Kune rumwe rutivi, kubva pakuona kwehupfumi, kuwedzera zvakanyanya kuchawedzera mutengo; kune rumwe rutivi, cellulose ether yakawanda inogona kukanganisa zvimwe zvinhu zve mortar, zvakaita sekusimba kwemortar.
4. Kukosha kwepesvedzero ye cellulose ether pakuderedza kwepurasitiki isina kupwanyika kwedhaka
Kubva pamaonero ekushandiswa kweinjiniya, kuwedzera zvine musoro kwe cellulose ether mudhaka kunogona kuderedza kuputika kwepurasitiki, nokudaro zvichideredza kutsemuka kwedhaka. Izvi zvakakosha zvikuru pakuvandudza mhando yezvivakwa, kunyanya pakuvandudza kugara kwenguva refu kwezvivakwa zvakaita semadziro.
Mune mamwe mapurojekiti akakosha ane zvinodiwa zvepamusoro zvemhando yedhaka, senge mamwe zvivakwa zvekugara zvepamusoro uye zvivakwa zvikuru zveveruzhinji, nekudzora simba re cellulose ether padhaka risina kupwanyika kwepurasitiki, zvinogona kuve nechokwadi chekuti chirongwa ichi chinosangana nezvinodiwa zvepamusoro.
5. Tarisiro dzekutsvaga
Kunyangwe paine mimwe mhedzisiro yekutsvagisa pamusoro pesimba re cellulose ether pakupwanya kwepurasitiki isina kuchekwa kwemortar, kuchine zvinhu zvakawanda zvinogona kuongororwa zvakadzama. Semuenzaniso, mashandiro emhando dzakasiyana dze cellulose ethers pakupwanya kwemortar isina kuchekwa padzinoshanda pamwe chete nezvimwe zvinowedzera.
Nekuvandudzwa kuri kuramba kuchiita tekinoroji yekuvaka, zvinodiwa kuti dhaka rishande zviri kuramba zvichiwedzera. Tsvagiridzo yakawanda inodiwa kuti unyatso dzora sei kushandiswa kwe cellulose ether mudhaka kuti uwane mhedzisiro yakanaka yekudzivisa kuputika kwepurasitiki pasina purasitiki uku uchifunga nezvehumwe hunhu hwedhaka.
Nguva yekutumira: Zvita-13-2024