Ew kunye neemfuno eziphezulu zokusebenza kwekhonkrithi.Ukusukela ekukhuthazeni i-concrete admixtures kwi-1940s, uphuhliso lwayo aluzange lutshintshe kuphela isakhiwo sangaphakathi sekhonkrithi elukhuni ukusuka kumanqanaba amancinci kunye ne-submicroscopic, kodwa kwatshintsha isakhiwo sekhonkrithi entsha kwinkqubo. .I-concrete admixture, eyaziwa ngokuba yi-dispersant okanye i-plasticizer, yeyona nto isetyenziswa ngokuqhelekileyo kwaye ibalulekile.

Ukulungiselela ikhonkrithi entsha kunye neempawu zokuhamba kakuhle, isakhiwo se-viscous esinciphisa ukuhamba phakathi kweengqungquthela ze-samente kufuneka zihlanjululwe, ukwenzela ukuba iinqununu ze-samente zihlakazwe ngokupheleleyo kwindawo yamanzi.Kukho iipropathi ezininzi ezichaphazela i-cement fusion, ezifana nokubunjwa kwamaminerali e-samente, imilo kunye nobukhulu beengqungquthela ze-samente, ukunyaniseka kwe-crystallization yamaminerali, kunye neemeko zokusebenza kunye nezinto ezisingqongileyo.Ezi zinto zingasentla zilawula ngokuthe ngqo okanye ngokungathanga ngqo ukuzinza kweengqungquthela zesamente kwi-slurry.Iimeko ezahlukeneyo eziphakathi zingatshintsha ixabiso lentlawulo yombane yeengqungquthela zesamente kwi-slurry, oko kukuthi, ukuguqula ukunyanzeliswa kwe-electrostatic phakathi kweengqungquthela.

Xa isixa esifanelekileyo se-concrete admixture yongezwa kwi-concrete esitsha, amanqaku amaqhekeza e-samente ayanda, kunye nokunyanzeliswa kombane phakathi kwamaqhekeza e-samente kwanda kakhulu, okukhokelela ekunciphiseni kwe-viscosity yekhonkrithi entsha, ekhuthaza ukuzinza kwe-samente. yonke inkqubo yokusasazwa.ukwanda, kunye nemali yokuhlawula amatyala yaphucuka.

Ngokubanzi, ukongeza inani elifanelekileyo lomxube wekhonkrithi kwintlama yesamente kunokukhuthaza ikhonkrithi entsha ukubonisa i-thixotropy eyomeleleyo.Oku kubangelwa ukubunjwa kwefilimu ehlanjululweyo ebusweni beengqungquthela zesamente ezibhengezwa kwi-agent yokunciphisa amanzi kunye nokunyuka kwamandla.Ukuba kukho ukungcangcazela okuncinci, kuya kubonisa ulwelo olungcono.I-thixotropy yekhonkrithi entsha ngaphandle kwe-superplasticizer ibuthathaka kakhulu.