Zuva Rokutumira:20,Feb,2023
Chii chinonzi chinoderedza mvura?
Mvura inoderedza mumiriri, inozivikanwawo se dispersant kana plasticizer, ndiyo inonyanya kushandiswa uye yakakosha yekuwedzera mune yakagadzirira yakasanganiswa kongiri. Nekuda kwekushambadza kwayo uye kupararira, kunyorova uye kutsvedza mhedzisiro, inogona kuderedza zvakanyanya kushandiswa kwemvura kwekongiri nyowani nekuita kwakafanana kwekushanda mushure mekushandisa, nekudaro inovandudza simba, kusimba uye zvimwe zvinhu zvekongiri.
Mvura inoderedza mumiriri inogona kukamurwa kuita mhando mbiri zvichienderana nekudzikisa kwayo mvura: yakajairwa yekudzikisa mvura mumiriri uye yakanyanya kunaka yekudzikisa mvura mumiriri. Iyo yekudzikisa mvura mumiririri inogona kusanganiswa nezvimwe zvinosanganiswa kugadzira yekutanga simba mhando, yakajairika mhando, yekudzoreredza mhando uye mhepo inopinza mhando yemvura yekudzikisa mumiririri zvinoenderana nezvinodiwa zveinjiniya mukushandisa.
Mvura inoderedza mishonga inogona kupatsanurwa kuita lignosulfonate uye zvinobva kwayo, polycyclic inonhuwira sulfonic acid munyu, mvura-soluble resin sulfonic acid munyu, aliphatic sulfonic acid munyu, yakakwirira polyols, hydroxy carboxylic acid munyu, polyol complexes, polyoxyethylene ethers uye zvinobva kwavari. chikuru chemakemikari zvikamu.
Ndeipi nzira yekuita yemvura inoderedza?
Zvose zvinoderedza mvura zvinoshandiswa pamusoro pemvura. Iyo yekudzikisa mvura mhedzisiro yemvura yekudzikisa mumiririri inonyanya kuoneka nebasa repamusoro remvura yekudzikisa mumiririri. Iyo huru yekuita maitiro ekudzikisa mvura ndeiyi inotevera:
1) Iyo inodzikisira mvura inoshambadza pane yakasimba-yemvura interface, inoderedza kushushikana kwepamusoro, inovandudza kunyorova kwepamusoro pemasimende, inoderedza kusagadzikana kwe thermodynamic yekupararira simende, uye nekudaro kuwana kugadzikana.
2) Iyo inodzikisira mvura inoburitsa yakananga adsorption pamusoro pemasimende zvimedu, kuitira kuti pamusoro pemasimende zvimedu zvigove nechaji yakafanana, ichigadzira electrostatic repulsion, nokudaro ichiparadza chimiro chakapepereswa chemasimende uye kuparadzira zvimedu zvesimende. Kune polycarboxylate uye sulfamate superplasticizers, adsorption ye superplasticizer iri muchimiro chemhete, waya uye giya, nekudaro ichiwedzera chinhambwe pakati pemasimende kuti ibudise electrostatic repulsion, ichiratidza kupararira kuri nani uye kuderera kwekuchengetedza.
3) Iyo firimu yemvura yakanyungudutswa inoumbwa kuburikidza neiyo hydrogen bond kushamwaridzana pakati pemvura inoderedza uye mamorekuru emvura kuti ibudise nzvimbo yekudzivirira, kudzivirira kusangana kwakananga kwemasimende esimende uye kudzivirira kuumbwa kwechimiro chakakomberedzwa.
4) Sezvo adsorption layer yakaumbwa pamusoro pemasimende, inogona kuvharidzira yekutanga hydration ye simenti, nekudaro ichiwedzera huwandu hwemvura yakasununguka uye kuvandudza fluidity yesamende paste.
5) Mamwe madhigirii ekudzikisa mvura anozounzawo imwe huwandu hwemabhuru madiki kuti aderedze kupokana pakati pemasimende, nekudaro kuvandudza kupararira uye kugadzikana kwesamende slurry.
Nguva yekutumira: Feb-20-2023
