Post Date: 6, Jun, 2022

Pakutanga, musanganiswa waishandiswa chete kuchengetedza simende. Nekuvandudzwa kwehunyanzvi hwekuvaka, admixture yave chiyero chikuru chekuvandudza kuita kwekongiri.

Kutenda kune superplasticizers, high-flow concrete, self-compacting concrete, high-simba kongiri inoshandiswa; kuvonga kune thickeners, zvivakwa zvekongiri yepasi pemvura inovandudzwa: nekuda kwevanodzoreredza, nguva yekumisikidza simende yakawedzerwa, zvinokwanisika kudzikisa kudonha kwekudonha uye kuwedzera nguva yekushanda kwekuvaka: nekuda kweiyo antifreeze, iyo inotonhora yemhinduro. inogona kudzikiswa, kana deformation yechando chekristaro chimiro hachizokonzeresa kukuvara kwechando. Zvinokwanisika chete kuita kuvaka pasi pekushisa kusina kunaka.

Kazhinji, admixtures ane zvinotevera mhedzisiro mukuvandudza zvimiro zvekongiri:

 1. Inogona kuderedza kushandiswa kwemvura kwekrete. Kana kuwedzera fluidity yekrete pasina kuwedzera huwandu hwemvura.

2. Nguva yekugadzika kwekrete inogona kugadziriswa.

3. Deredza kubuda ropa uye kuparadzana. Vandudza kushanda uye mvura elutriation kuramba.

4. Kurasika kwekudonha kunogona kuderedzwa. Wedzera kupomba kwepombi kongiri.

5. Shrinkage inogona kuderedzwa. Kuwedzera bulking agent kunogona zvakare kubhadhara shrinkage.

6. Kunonoka kwekutanga hydration kupisa kwekongiri. Deredza tembiricha yekukwira kwekongiri yakawanda uye kuderedza kuitika kwekutsemuka.

7. Kuvandudza simba rekutanga rekrete. Dzivirira kutonhora pasi pekushisa kusina kunaka.

8. Kuvandudza simba, kuwedzera kupikisa kwechando, kusapindirana, kupfeka kusagadzikana uye kusagadzikana kwekuora.

9. Dzora maitiro e-alkali-aggregate. Kudzivirira simbi uye kuderedza chloride ion diffusion.

10. Yakagadzirwa nekongiri nezvimwe zvinhu zvakakosha.

11. Deredza viscosity coefficient yekrete, nezvimwewo.

 Mushure mekuwedzera ma admixtures kune kongiri, nekuda kwemhando dzakasiyana, mhedzisiro yacho yakasiyanawo, mazhinji ayo ari emuviri mhedzisiro, senge adsorption pamusoro pemasimende masimende kuti iite adsorption firimu, iyo inoshandura iyo inogona uye inoburitsa akasiyana kuyamwa kana kudzoreredza; Kuparadza chimiro che flocculation, kuvandudza kugadzikana kwe simenti diffusion system, uye kuvandudza mamiriro e simenti hydration: vamwe vanogona kuumba macromolecular structure uye kuchinja adsorption state pamusoro pezvikamu zvesimenti; mamwe anogona kuderedza kudhonzwa kwepamusoro uye simba repamusoro remvura, nezvimwewo: uye Vashoma vanotora chikamu zvakananga mukuchinja kwemakemikari uye kugadzira makomisheni matsva nesamende.

Nekuti iyo admixture inogona zvinobudirira kuvandudza mashandiro ekongiri, uye ine hupfumi hunobatsira. Yakashandiswa zvakanyanya munyika dzakawanda uye yave chinhu chakakosha mukongiri. Kunyanya kushandiswa kwepamusoro potency reducers. Zvimedu zvesimende zvinogona kuparadzirwa zvizere, kushandiswa kwemvura kunoderedzwa zvakanyanya, uye simba resimende rinoshandiswa zvizere. Nekuda kweizvozvo, dombo resimende rakanyanya kukora, uye chimiro chepore uye microstructure yenzvimbo yekutarisa zvakagadziridzwa, kuitira kuti iyo yemuviri uye yemagetsi zvimiro zvekongiri zvakagadziridzwa zvakanyanya, ingave impermeability yemvura, kana chloride ion diffusion. , carbonization, uye sulfate corrosion resistance. . Zvakare nekukanganisa kupikisa, kupfeka kuramba uye zvimwe zvinhu zviri nani pane kongiri isina admixtures, kwete kungovandudza simba, kunatsiridza kushanda. Inogonawo kuvandudza kusimba kwekongiri. Zvinongogoneka kugadzira kongiri yepamusoro nepamusoro-soro yekushanda, simba repamusoro uye kusimba kwepamusoro nekusanganisa superplasticizers.