Concrete admixture chinhu chemakemikari chinowedzerwa mukuita kwekusanganisa kongiri, inoverengera isingasviki 5% yesimende, uye inogona kuvandudza zvakanyanya kuita kwekongiri.Hunhu hwekongiri admixtures akawanda marudzi uye madiki dosage, ane simba guru pakuita kwekongiri, uye ane hunhu hwekudyara kushoma, kukurumidza kuita, uye zvakakosha zvehunyanzvi uye zvehupfumi mabhenefiti.Nekuenderera mberi kwekufambira mberi kwesainzi uye tekinoroji, misanganiswa yave ichishandiswa zvakanyanya uye zvakanyanya, uye admixtures ave chikamu chechishanu chakakosha chekongiri mukuwedzera kune zvina zvakakosha zvikamu.

Admixtures inogona kuvandudza iyo anti-carbonation kuita kwekongiri kune imwe nhanho.Pane hukama hwemutsara pakati pekudzika kwecarbonation uye porosity yekongiri.Admixtures ine simba guru pakupikisa kwechando kwekrete.Iyo ine kuita kwakanaka, asi iyo imwe chete yekuwedzera yemumiriri wesimba rekutanga haina mhedzisiro pakupikisa kwechando kwekongiri.

Kubva pane kongiri admixtures basa, inogona kukamurwa seinotevera:
1) Chemical admixtures yekuvandudza rheological zvimiro zvekongiri musanganiswa.Kusanganisira akasiyana-siyana ekudzikisa mvura, maejenti ekupinda mumhepo uye ekupomba, nezvimwe.
(2) Chemical admixtures inogadzirisa nguva yekumisikidza uye kuomesa zvinhu zvekongiri.Kusanganisira retarders, ekutanga simba vamiririri uye accelerators.
(3) Chemical admixtures kuvandudza kusimba kwekongiri.Kusanganisira air-entraining agent, antifreeze agent, waterproof agent uye rust inhibitor, nezvimwe.
(4) Chemical admixtures kuvandudza zvimwe zvinhu zvekongiri.Kusanganisira air-entraining agents, kuwedzera vamiririri, vamiririri vemavara, nezvimwe.

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