Hydroxypropyl methylcellulose musanganiswa wepolymer unonyungudika nemvura, unozivikanwawo seresin inonyungudika nemvura kana polima inonyungudika nemvura. Iyo inowedzera musanganiswa nekuwedzera viscosity yemvura inosanganiswa. Iyo ndeye hydrophilic polymer zvinhu. Inogona kunyungudutswa mumvura kuita mhinduro kana kupararira. Ongororo dzinoratidza kuti kana huwandu hwenaphthalene-based superplasticizer huchiwedzera, kubatanidzwa kwe superplasticizer kunoderedza kupararira kuramba kweichangobva kusanganiswa simende dhaka. Izvi zvinodaro nekuti naphthalene superplasticizer ndeye surfactant. Apo mvura inoderedza mumiriri inowedzerwa kune dhaka, iyo inoderedza mvura inogadziriswa pamusoro pezvikamu zvesimenti, kuitira kuti pamusoro pezvikamu zvesimenti zvive nemhosva imwechete. Iyi yemagetsi repulsion inoparadza chimiro che flocculation chinogadzirwa ne simenti particles, uye mvura yakaputirwa muhutano inosunungurwa, zvichiita kuti kurasikirwa kwechikamu chesimende. Panguva imwecheteyo, zvakaonekwa kuti nekuwedzera kweHPMC yemukati, kupararira kuramba kwesamende nyowani kwakava nani uye nani.
Kusimba kwekongiri:
HPMC yepasi pemvura isiri-dispersible kongiri musanganiswa unoshandiswa muhighway bhiriji hwaro engineering, uye dhizaini yesimba redhizaini iC25. Sekureva kweyedzo yekutanga, huwandu hwesimende i400kg, huwandu hwemicrosilica i25kg/m3, huwandu hwakakwana hweHPMC i0.6% yesamende, chiyero chemvura-simende 0.42, jecha reshiyo i40%, uye yakabuda naphthyl superplasticizer i8% yesamende yakawanda. , The kongiri mienzaniso mumhepo kwemazuva 28 ane avhareji simba 42.6MPa, uye kongiri akadururwa pasi pemvura kwemazuva 28 nemvura donhwe 60mm ane avhareji simba 36.4 MPa.
1. Kuwedzerwa kweHPMC kune pachena kudzoreredza mhedzisiro pamusanganiswa wedhaka. Nekuwedzera kweHPMC yemukati, nguva yekumisikidza yedhaka zvishoma nezvishoma inowedzera. Pasi pezvakafanana zveHPMC, dhaka rakaumbwa pasi pemvura riri nani pane dhaka rakaumbwa mumhepo. Iyo nguva yekusimbisa yekuumba yakareba. Ichi chimiro chinogonesa kupomba kwekongiri pasi pemvura.
2. Fresh simende dhaka yakasanganiswa hydroxypropyl methylcellulose ine yakanaka bonding kushanda uye haitombobuda ropa.
3. Zviri muHPMC uye kudiwa kwemvura kwedhaka kwakadzikira pekutanga uye kwakawedzera zvakanyanya.
4. Kubatanidzwa kwemvura inoderedza agent inovandudza dambudziko rekuwedzera kwemvura kudiwa kwedhaka, asi inofanira kudzorwa zvine musoro, zvikasadaro dzimwe nguva inoderedza kupararira kwemvura yepasi pemvura ichangobva kusanganiswa simende.
5. Pane mutsauko mudiki muchimiro chesimende paste specimen yakasanganiswa neHPMC uye isina chinhu sampuli, uye pane mutsauko mudiki muchimiro uye density yesimende paste specimen mukudurura mvura nemhepo. Sample yakaumbwa mushure memazuva makumi maviri nemasere pasi pemvura yakasununguka zvishoma. Chikonzero chikuru ndechekuti kuwedzerwa kweHPMC kunoderedza zvakanyanya kurasikirwa uye kupararira kwesementi panguva yekudira mumvura, asi zvakare kunoderedza kuumbwa kwedombo resimende. Muchirongwa ichi, huwandu hweHPMC hunofanirwa kudzikiswa zvakanyanya sezvinobvira uchiona mhedzisiro yekusapararira pasi pemvura.
6. Iko kusanganiswa kweHPMC pasi pemvura isiri-dispersible kongiri admixture, kutonga kwehuwandu kunobatsira pakuvandudzwa kwesimba. Pilot zvirongwa zvakaratidza kuti kongiri inoumbwa mumvura ine simba reyero ye84.8% yeiyo yakaumbwa mumhepo, uye mhedzisiro yacho inotonyanya kukosha.
Nguva yekutumira: Jun-16-2023