Post Date:7,Nov,2022
Basa rekongiri admixtures ndere kuvandudza kuyerera kwekongiri uye kuderedza huwandu hwesimende zvinhu mukongiri. Naizvozvo, kongiri admixtures anoshandiswa zvakanyanya munzvimbo dzakasiyana dzekuvaka.
Iyo nzira yekuita kwekongiri admixtures:
Iwo anowanzo shandiswa naphthalene-based admixtures uye polycarboxylate-based admixtures ndeye organic makomisheni ane huremu hwakanyanya huremu (kazhinji 1500-10000) uye ndeyechikamu chevanoshandisa surfactants.
Iyo molecule ye surfactant ine bipolar chimiro, imwe mugumo iboka risiri-polar lipophilic (kana risiri-polar hydrophobic boka), uye imwe magumo iboka repolar hydrophilic. Mushure mekunge iyo surfactant yanyungudutswa mumvura, inogona kutamba mabasa akasiyana siyana sekuparadzira, kunyorova, emulsifying, kupupuma furo uye kugeza uku ichideredza kushushikana kwepasi.
A. Adsorption-kupararira
Iyo fluidity yemusanganiswa wekrete inobva pahuwandu hwemvura yakasununguka mukrete. Mushure mokunge musanganiswa wacho wawedzerwa kune kongiri, zvimedu zvesimende zvinopararira mumwe nemumwe nekuda kwekutungamira kweadsorption yemamolekemu admixture pamusoro pezvimedu zvesimende, zvichiita kuti electrostatic repulsion pakati pavo. Nekuda kweizvozvo, iyo flocculation chimiro chesimende inoparadzwa, uye yakawanda yemahara mvura inoburitswa, iyo inowedzera zvakanyanya fluidity yemusanganiswa wekongiri.
B. Kunyorova
Nekuda kwekurongeka kweanorongedzerwa mamorekuru emusanganiswa pamusoro pemasimende masimende, monomolecular solvated mvura firimu inoumbwa. Iyi firimu remvura rinowedzera nzvimbo yekubatana pakati pemasimende uye mvura kune rumwe rutivi, uye ine imwe yekunyorova mhedzisiro kune rumwe rutivi. Nokudaro, simiti yakazara nemvura uye simba resimende rinowedzera nokukurumidza.
Iwo akakosha mabasa ekongiri admixtures:
1. Pasina kuderedza kushandiswa kwemvura yeyuniti, mvura-binder ratio inoramba isingachinji, iyo inovandudza kushanda kwekrete yakachena uye inovandudza fluidity; nekuda kwenzvimbo yakawedzera yekubatana pakati pesimende particles nemvura, simenti yakazara hydrated, kunyange zvazvo mvura-binder ratio Invariant, simba rekrete rinowanzova nekumwe kuvandudzwa.
2. Pasi pemamiriro ekuchengetedza imwe dhigirii yebasa, kuderedza kushandiswa kwemvura, kuderedza mvura-binder ratio, uye kuvandudza simba rekrete.
3. Pasi pemamiriro ekuchengetedza rimwe simba, kuderedza kuwanda kwezvinhu zvesimenti, kuderedza kushandiswa kwemvura, kuchengetedza mvura-binder ratio isina kuchinjwa, uye chengetedza simenti nezvimwe zvinhu zvesimenti.
Maitiro ekunyatso gadzira uye kushandisa kongiri admixtures:
Kutenga nemazvo uye kushandisa zvakasanganiswa zvinogona kuunza hukuru hwehupfumi nehunyanzvi. Haikwanise kungovandudza simba rekongiri, asi zvakare kuderedza mutengo wekongiri musanganiswa ratio.
Iyo chaiyo nzira ndeyekutevera:
a. Test link
Iko kuyedzwa uye kuyedzwa kweakasiyana hunyanzvi zviratidzo zve admixtures chinhu chakakosha chinongedzo usati watenga kutaurirana. Kuburikidza nekuyedzwa, zviyero zvekufanirwa zveakasiyana tekinoroji zviratidzo zveiyo admixture zvinofanirwa kutsanangurwa. Kusanganisira iyo yakasimba yemukati ye admixtures, chiyero chekudzikisa mvura, density, slurry fluidity, kongiri yekudzikisa mvura mwero uye zvimwe zviratidzo zvehunyanzvi. Zvinokurudzirwa kuti kongiri yekudzikisa mvura inoshandiswa sechiratidzo chikuru chekuyera chiyero chemhando yezvisanganiswa.
b. Procurement
Mushure mekunge maitiro ekukodzera ekusanganiswa ajekeswa, nhaurirano dzekutenga dzinogona kutanga. Zvinokurudzirwa kuti vanogadzira admixture vanofanirwa kukoka mabhidhi zvichienderana neakakodzera zviyero zvakatemwa nebvunzo. Pamusana pekuti hutano hwekugovera we admixture hahuna kuderera kudarika zvinodiwa zvekutengesa, mutengesi achagadziriswa maererano nemutemo wekukunda bhidhiyo pamutengo wakaderera.
Panguva imwecheteyo, kusarudzwa kwevagadziri vekongiri vanogadzira admixture kunofanirwa kunyatso tarisa chiyero chekugadzira chemugadziri, chinhambwe chekufambisa, kutakura, ruzivo rwekupa uye kugovera mhando yemhando yezvirimwa zvakakura zvekusanganisa kana mapurojekiti makuru einjiniya, uye kugona kwesevhisi mushure mekutengesa. uye mazinga. Sechiratidzo chimwe chete chekuongorora kwemugadziri.
c. Chibvumirano chekugamuchira
Chiteshi chekusanganisa chinofanirwa kuyedza zvakasanganiswa zvisati zvaiswa mudura, uye mhinduro dzebvunzo dzinogona kuiswa muchengetedzo chete mushure mekunge mhedzisiro yebvunzo yave yakakodzera zvinoenderana nemazinga akasainwa muchibvumirano. Zvinokurudzirwa kusiyanisa pakati pezviratidzo zvakakosha uye zviratidzo zvekutsvaga. Kuburikidza nekuita kwenguva refu, munyori anotenda kuti zviratidzo zvakakosha zvekusanganiswa kwemvura-kuderedza chiyero (dhaka) uye kongiri yekuderedza mvura; mareferensi zviratidzo ndeye density (specific gravity), solid content uye fluidity yesamende paste. Nekuda kwenguva yekuyedzwa, zviratidzo zvehunyanzvi izvo zvinowanzoyedzwa muchibvumirano chekugamuchira ndeye density, kuyerera kwesamende paste uye mwero wekudzikisa mvura (dhaka).
Nguva yekutumira: Nov-07-2022
