Idethi yokuthunyelwe:2, Jan,2024
Ukusetshenziswa kwe-concrete admixtures kuthuthukisa kakhulu izakhiwo zokugeleza kokhonkolo futhi kunciphisa inani lezinto ze-cementitious kukhonkolo.Ngakho-ke, izingxube zekhonkrithi zisetshenziswa kabanzi.Emisebenzini yokukhiqiza yesikhathi eside, kutholakale ukuthi iziteshi eziningi zokuxuba zinokungaqondi kahle ekusetshenzisweni kwezixube, okuholela ekungeneni kwamandla okhonkolo, ukungasebenzi kahle, noma izindleko zokuhlanganisa ukhonkolo ngokweqile.
Ukukwazi ukusebenzisa kahle izixube kungakhuphula amandla kakhonkolo kuyilapho kugcina izindleko zokuhlanganisa zingashintshile;noma unciphise izindleko zokuhlanganisa ngenkathi ugcina amandla kakhonkolo;gcina isilinganiso samanzi-samente singashintshiwe, thuthukisa ukusebenza kokhonkolo.
A.Ukungaqondi kahle okuvamile mayelana nokusetshenziswa kwe-admixtures
(1) Thenga izixube ngamanani aphansi
Ngenxa yokuncintisana kwezimakethe, isikhungo sokuxuba sinokulawula okuqinile ekuthengweni kwezinto zokusetshenziswa.Iziteshi zokuxuba zonke zinethemba lokuthenga izinto zokusetshenziswa ngentengo ephansi, futhi okufanayo kuya ngezixube zikakhonkolo.Iziteshi zokuxuba zehlisa intengo yokuthengwa kwezinto ezixubene, okuzokwenza nakanjani abakhiqizi be-admixture behlise izinga labo lekhwalithi.Ngokuvamile, indlela yokwamukela izixube ayivami ukucaciswa ezinkontilekeni zokuthengwa kwezitshalo zokuxuba.Ngisho noma ikhona, ihambisana kuphela nezidingo ezijwayelekile zikazwelonke, futhi izidingo zezinga likazwelonke ngokuvamile zingamazinga aphansi kakhulu.Lokhu kuholela eqinisweni lokuthi lapho abakhiqizi be-admixture bewina ibhidi ngentengo ephansi, izingxube abazihlinzekayo zisezingeni eliphansi futhi ngokuvamile azihlangabezani nezidingo ezijwayelekile zikazwelonke, okwenza kube nzima ukuhlangabezana nezidingo zokusebenza zesiteshi sokuxuba ukuze kusetshenziswe izingxube.
(2) Nciphisa inani lezithasiselo
Izinga lokuthatha izinqumo lesiteshi sokuxuba liqapha ngokuqinile izindleko ze-mix ratio, futhi linezidingo ezicacile kumthamo usimende kanye nesilinganiso se-admixture.Lokhu kuzoholela ekutheni umnyango wezobuchwepheshe ungalokothi udabule ungqimba lokuthatha izinqumo's izidingo zomthamo omkhulu wezithasiselo lapho uklama isilinganiso sokuxuba.
(3) Ukuntuleka kokuqapha kwekhwalithi nokuqinisekiswa kokulungiswa kwesilingo se-admixtures
Njengamanje, ukuze kuhlolwe isitoreji se-admixtures, iziteshi eziningi zokuxuba zenza inkomba eyodwa noma ezimbili zezobuchwepheshe ezifana nokuqukethwe okuqinile, izinga lokunciphisa amanzi, ukuminyana, kanye ne-fluidity ye-slurry ehlanzekile.Zimbalwa iziteshi zokuxuba zenza izivivinyo zekhonkrithi.
Ekukhiqizeni, sithole ukuthi noma ngabe okuqukethwe okuqinile, izinga lokunciphisa amanzi, ukuminyana, uketshezi kanye nezinye izinkomba zobuchwepheshe ze-admixture zihlangabezana nezidingo, ukuhlolwa kukakhonkolo kusengase kungawufezi umphumela wengxube yokuqala yesilingo, okungukuthi, izinga lokuncishiswa kwamanzi okukhonkolo alanele., noma ukungavumelani nezimo.
B. Umthelela wokusetshenziswa okungafanele kwezingxube zekhwalithi nezindleko zikakhonkolo
Ngenxa yezinga eliphansi lekhwalithi ye-admixtures ethengwe ngamanani aphansi, ukuze kuzuzwe imiphumela eyanele yokunciphisa amanzi, iminyango yezobuchwepheshe ivame ukwandisa umthamo we-admixtures, okuholela ekuhlanganiseni kwekhwalithi ephansi kanye nezinjongo eziningi.Ngokuphambene, ezinye iziteshi zokuxuba ezinokulawulwa kwekhwalithi ezinzile kanye nokulawulwa kwezindleko zemiksi engcono zisebenzisa izingxube zekhwalithi engcono nezintengo eziphakeme.Ngenxa yokuthi ikhwalithi ephezulu futhi isetshenziswa kancane, izindleko zeyunithi ye-admixtures ziyehla.
Ezinye iziteshi zokuxuba zikhawulela inani lezingxube.Lapho ukwehla kukakhonkolo kunganele, umnyango wezobuchwepheshe uzonciphisa umswakama wesihlabathi namatshe, noma ukhuphule ukusetshenziswa kwamanzi ngeyunithi ngayinye kakhonkolo, okuzoholela ngokuqondile ekwehleni kwamandla kakhonkolo.Iminyango yezobuchwepheshe enomuzwa oqinile wekhwalithi izokwenyusa ngokungaqondile noma ngokuqondile ukusetshenziswa kwamanzi okuhlangene ngakunye futhi ngesikhathi esifanayo ikhulise ngokufanelekile inani lezinto zikasimende (ukugcina isilinganiso sikasimende samanzi singashintshile), okuholela ekwenyukeni kwezindleko zikasimende. isilinganiso sokuxuba ukhonkolo.
Isiteshi sokuxuba asinakho ukugadwa kwekhwalithi kanye nokuqinisekiswa kokulungiselela kwesivivinyo kwezixube.Lapho izinga lezithasiselo lishintshashintsha (lincipha), umnyango wezobuchwepheshe usasebenzisa isilinganiso sokuqala sokuxuba.Ukuze kuhlangatshezwane nezidingo zokuwohloka kokhonkolo, ukusetshenziswa kwamanzi kwangempela kokhonkolo kuyanda, isilinganiso samanzi nosimende siyanda, futhi amandla kakhonkolo ayancipha.
Isikhathi sokuthumela: Jan-02-2024