Mechanism yeSuperplasticizer paRheological Properties yeConcrete

Kubudirira kwepamusoro superplasticizer inoshandiswa zvakanyanya kuvandudza mashandiro ekongiri kusanganisa hombe fluidity yekongiri, kunatsiridza simba rekongiri kana kugadzira yakakwirira simba kongiri, ine akasiyana-siyana epamusoro-inoshanda superplasticizer mune akasiyana simende zvinhu uye kushandiswa kwemhando dzakasiyana dzekongiri., nyaya zhinji dzave dzakanyanya-kushanda superplasticizer uye simende haichinji, kunyanya mukuderedza mvura-kuderedza mhedzisiro kana kuwedzera liquidity yemugumisiro kwakaipa, inonamira nekukurumidza, retarded, kurasikirwa kwekudonha, fast,Kunyange kuderedza simba rekrete, iyi mhando yekusagadzikana uye inoshanda superplasticizer marudzi uye maitiro ekuita, kusarudzwa kwezvinhu zvakasvibiswa uye nzira yekugadzira, kuumbwa kwecementitious zvinhu, fineness, simende vachikuya nhanho yemusiyano, zvimwe zvakaita se ambient tembiricha, yekuwedzera nzira uye admixture dosage ichavawo nemhedzisiro.

Mechanism ye superplasticizer pane rheological zvimiro zvekongiri

Dispersion effect: mushure mekuwedzera mvura yekusanganisa simenti, nekuda kwe hydration ye simenti particles, Simende zvimedu zvinoumba chimiro chemagetsi kaviri layer, gadzira solvation mvura firimu, uye iyo simende particle pamusoro ine machaji akatarisana inoita simenti pakati pekubatana nekushandira pamwe, kugadzira slurry flocculation chimiro, make the 10% ~ 30% yemvura inosanganiswa inoputirwa nesamende zvidimbu, haikwanise kutora chikamu mukuyerera kwemahara uye lubrication, nokudaro kukanganisa liquidity kongiri musanganiswa. Kana uchiwedzera superplasticizer, nekuti iyo superplasticizer mamorekuru akadsorbed pamusoro pemasimende esimende anogona kutungamira, sement particle pamusoro (kazhinji mhosva yakaipa) nemhosva imwe cheteyo, kugadzira electrostatic repulsion, zvakaita kuti zvimedu zvesimende zvipararire, flocculation chimiro kuparara, sunungura chikamu chakaputirwa chemvura, kutora chikamu mukuyerera, kuitira kuti zvinyatso wedzera liquidity yemusanganiswa wekongiri.

Lubrication: superplasticizer hydrophilic polarity yakasimba kwazvo, saka iyo superplasticizer adsorption firimu pamusoro pemasimende zvimedu zvinogona kugadzira yakagadzika yakanyungudutsa mvura firimu ine mamorekuru emvura., iyi bhaisikopo yemvura ine yakanaka lubrication effect, inogona kunyatso kudzikisa kutsvedza kupikisa pakati pemasimende esimende, kuitira kuti uwedzere kuvandudza kufamba kwekongiri.

Steric chipingamupinyi: hydrophilic branched cheni mune iyo superplasticizer chimiro inotambanukira mune aqueous mhinduro, nekudaro kugadzira hydrophilic yakasimba adsorption layer ine humwe ukobvu pamusoro peiyo adsorbed simende zvimedu.. Kana zvimedu zvesimende zviri pedyo nepedyo, iyo adsorption layer inotanga kupindirana, ndizvo, iyo steric chipingamupinyi pakati pesimende particles inogadzirwa. Kunyanya kupindirana kuri, chikuru chinotadzisa steric chipingamupinyi chiri, uye chipingamupinyi chikuru ndechekubatana pakati pezvikamu zvesimende kuitira kuti kudonha kwekongiri kurambe kwakanaka..

Graft copolymerization inononoka-kuburitsa mhedzisiro yebranched-chain: rudzi rutsva rwe superplasticizer senge poly (carboxylic acid superplasticizer mukugadzirisa, mamorekuru e superplasticizer pakubatanidza pane mamwe ebranched-chain, iyo branched-chain kwete chete inogona kupa nzvimbo steric effect, uye, mune yakakwirira basicity ye simenti hydration nharaunda, iyo branched-chain inogonawo kugurwa zvishoma nezvishoma, kuburitsa yakawanda carboxylic acid ine dispersion effect, kuitira kuti igone kuvandudza kushanda kwekupararira kwezvikamu zvesimende, uye kudzora kurasikirwa kwekudonha.

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