I-concrete admixture yi-chemical substance eyongezwa kwinkqubo yokuxuba ikhonkrithi, ibalwa ngaphantsi kwe-5% yesamente, kwaye inokuphucula kakhulu ukusebenza kwekhonkrithi.Iimpawu ze-concrete admixtures zininzi iintlobo kunye ne-dosage encinci, enempembelelo enkulu ekusebenzeni kwekhonkrithi, kwaye ineempawu zotyalo-mali oluncinci, umphumo okhawulezayo, kunye neenzuzo ezibalulekileyo zobugcisa kunye nezoqoqosho.Ngenkqubela phambili eqhubekayo yenzululwazi kunye neteknoloji, i-admixtures isetyenziswe ngakumbi nangakumbi, kwaye i-admixtures iye yaba yinto yesihlanu ebalulekileyo yekhonkrithi ukongeza kumacandelo amane asisiseko.

I-Admixtures inokuphucula ukusebenza kwe-anti-carbonation yekhonkrithi ukuya kwinqanaba elithile.Kukho ubudlelwane obuthile bomgca phakathi kobunzulu be-carbonation kunye ne-porosity yekhonkrithi.I-Admixtures inempembelelo enkulu kwi-frost resistance ye-concrete.Inokusebenza kakuhle, kodwa ukongezwa okukodwa kwe-ejenti yamandla kwangoko ayinayo impembelelo kwi-frost resistance yekhonkrithi.

Ngokusekwe kwi-concrete admixtures function, inokwahlulwa ngolu hlobo lulandelayo:
1) Iingxube zekhemikhali zokuphucula iimpawu ze-rheological zemixube yekhonkrithi.Kubandakanya ii-agent ezahlukeneyo zokunciphisa amanzi, ii-agent zokungenisa umoya kunye nee-agent zokupompa, njl.
(2) Imixube yeekhemikhali ezilungisa ixesha lokumisela kunye neempawu ezilukhuni zekhonkrithi.Kubandakanya ii-retarders, ii-arhente zamandla okuqala kunye ne-accelerators.
(3) Imixube yeekhemikhali ukuphucula ukuqina kwekhonkrithi.Kubandakanya i-ejenti yokungenisa umoya, i-antifreeze, i-agent engangeni manzi kunye ne-rust inhibitor, njl.
(4) Imixube yeekhemikhali ukuphucula ezinye iimpawu zekhonkrithi.Kubandakanya i-air-entraining agents, i-ejenti yokwandisa, i-agent enemibala, njl.

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