Ikhono elizenzekelayo lokuhlala libuyele phansi kuvuma lezi zinto ezimiswa, eziyinqwaba ezingenakusebenza kanye nemitapo ye-alkali, lapho kudalwa khona imithombo yokuhlanganisa imithombo yokufaka phezulu. Iqukethe izinhlelo zokubopha ezisebenza kahle kakhulu (iPortland cement kanye nezinto zokwakha eziwusizo), izinga lokuhlanganisa elilungiselelwe ukuthuthukisa ukuhamba, kanye nezithako zokunciphisa amanzi (ama-superplasticizers), i-SCC ifinyelela ekuhlanganiseni okuhle nokukhuphuka. Le ngxube iqinisekisa izithako zokushintsha i-viscosity kanye nezilinganiso ze-water-cement ezilawulwayo ukuze kuncishiswe isidingo sokuhlanganiswa kwangaphandle ngenkathi kugcinwa ukuqina kwesakhiwo nokuhlala isikhathi eside emiphakathini eyingozi ye-geotechnical neyakhiwe. Eziphuthumayo zendawo ezinzulu nezithuthukiswe, i-self-compacting concrete iyahlinzeka ngempumelelo ehlanganisiwe lapho imingcele yokufinyelela, izinhlelo zokunwetshwa eziyinkimbinkimbi, nezithombe zok casting zibeka ubunzima bokufaka i-concrete ejwayelekile. Ekubunjweni kwepile cap, i-SCC iqinisekisa ukupakishwa okuphelele kokunwetshwa nokuxhunywa kwepahume ngaphandle kwezixhumanisi ezibanda noma amaqhugwane, okubalulekile ukuze kudlule umthwalo nokuvikela ekukhubazekeni ezindleleni zasemanzini nezimiyalelo ezinzima. Ekubunjweni kwe-caisson kanye ne-diaphragm wall, izici zokuzithiba elastically zinciphisa ukuhamba ukufaka emaphuthumeni nokunciphisa izikhathi zokuzikhangisa ezinzima ngenkathi kufinyelela amandla afanayo phakathi kwezithako ezivertical. Izikhali, izindonga ze-secant pile, nezicelo ze-soil-cement mixed-in-place (MIP) zithola izinzuzo ezinhle ze-SCC ezikhaleni ezithile zokuhlasela ezijulile nezindida ezinzima. Ama-colums okuhlinzeka ngendawo ethile kanye nezinto eziphansi ezilawulwayo (CLSM) ezifaka izinqubo ze-SCC zithuthukisa ukuhlanganisa ukufaneleka ezindaweni ezibuthakathaka noma ukuthola ukungcoliswa. Ukulethwa kwe-self-compacting concrete kucwaningwa ngezikhala ezimfica emazingeni ajwayelekile, nakuba imishini eqondile—okuhlanganisa izinhlelo zokubala izithako kanye neziqu zezivivinyo—ihlukanisa izidingo zokukhiqiza. Ukusetshenziswa endaweni kudinga ukuhlela okuphelele ngenxa yeziqhamo ezikhululekile; ama-pumps e-concrete anezinga eliphansi lokuchitha kucacisa izindlela zokufaka ezigcina ukuphakanyiswa okungeziwe ku-1.5 amamitha ukuvimbela ukuhamba okuhlukanisayo. Isikhathi sokugcina sinqunywa phakathi kwemizuzu engama-90–120 kuye ngezimiso zendawo nezezemvelo, kudinga ukuhlelwa okuqondile phakathi kokwakhiwa kombhoshisi nezinye izindawo. Abasebenzi abanolwazi kanye nezinsiza zokuhlola ukuhamba ezifakiwe zandisa ukusebenza kahle kokufaka ngenkathi kugcinwa ukuhlonza phakathi kwezithuthi eziningi. I-SCC ihlukaniswa ngamaqembu wamandla (C20–C100) kanye nezinhlelo zokuhamba (SF1–SF3, ngokusekelwe kumjikelezo wezithombe zokuhamba kanye nezilinganiso zesikhathi se-T500) ngokwezindinganiso ze-EN 206-9. Izinhlobo zihlukanisa izinhlelo ze-SCC ezisebenza kahle kakhulu ezine-silica fume noma i-metakaolin ukuze kwandiswe ukubekezelela ezindlini ze-chloride, kanye nezixubano ze-SCC ezisunguliwe eziyisebenzisela i-fly ash, i-slag, noma amagagasi aphindayo ukuze kuncishiswe i-carbon egqilaziwe ekwakheni phansi. Ukudidiyela okuqoqiwe nokungaqondile kungase kudinge izinkanyezi ezihluke ngokuphelele ezilungiselelwe amandla aphakeme (ukuphakanyiswa okukhawulelwe) noma isikhathi eside sokusebenza (okukhumbuleka). Izincwadi zezobunjiniyela ze-self-compacting concrete zidinga ukuhlola ubunzima bokwakha, ubunzima bendawo, izinga lokushisa ngesikhathi sokufaka, kanye neklasi yeziqu zokuhlala. Izidingo zokuhlola ukuskena, ukufaka ukunciphisa, nokuvikela ukubhamuka kuziqhaza ekukhetheni uhlobo lwe-cement kanye nemiyalo yezinto eziwusizo. Ukuhlaziya izindleko-nenzuzo okwenza umphakathi ufanele ukudlulisela phakathi kwemidwebo embalwa yokukhetha izinto ezihluke nomphakathi ohambisana nemiyalezo ye-geometric noma i-environmental. Ukukhiqizwa kwe-self-compacting concrete kanye nokufaka insimu kuhlangabezana ne-EN 12350-8 (test flow slump), EN 12350-9 (test ye-V-funnel), EN 12350-10 (test ye-L-box), kanye ne-ASTM C1611 kanye ne-C1621 izindinganiso zokuvivinya ukuhamba. Ukukhethwa kwezobunjiniyela kubhekisela ku-EN 1992-1-1 (Eurocode 2) kanye ne-ASTM C33 ukuze kuhlonishwe izinto, ngezingqikizi nezokuhlola ezinzima zidinga izinhlelo zokuhlala ze-EN 206-1 kanye neziqu zokuqinisa isikhathi eside ukuze kuqinisekiswe ukusebenza okuhle okwenzeka emsebenzini ohlukahlukene we-geotechnical.
Ikhono elizenzekelayo lokuhlala libuyele phansi kuvuma lezi zinto ezimiswa, eziyinqwaba ezingenakusebenza kanye nemitapo ye-alkali, lapho kudalwa khona imithombo yokuhlanganisa imithombo yokufaka phezulu. Iqukethe izinhlelo zokubopha ezisebenza kahle kakhulu (iPortland cement kanye nezinto zokwakha eziwusizo), izinga lokuhlanganisa elilungiselelwe ukuthuthukisa ukuhamba, kanye nezithako zokunciphisa amanzi (ama-superplasticizers), i-SCC ifinyelela ekuhlanganiseni okuhle nokukhuphuka. Le ngxube iqinisekisa izithako zokushintsha i-viscosity kanye nezilinganiso ze-water-cement ezilawulwayo ukuze kuncishiswe isidingo sokuhlanganiswa kwangaphandle ngenkathi kugcinwa ukuqina kwesakhiwo nokuhlala isikhathi eside emiphakathini eyingozi ye-geotechnical neyakhiwe. Eziphuthumayo zendawo ezinzulu nezithuthukiswe, i-self-compacting concrete iyahlinzeka ngempumelelo ehlanganisiwe lapho imingcele yokufinyelela, izinhlelo zokunwetshwa eziyinkimbinkimbi, nezithombe zok casting zibeka ubunzima bokufaka i-concrete ejwayelekile. Ekubunjweni kwepile cap, i-SCC iqinisekisa ukupakishwa okuphelele kokunwetshwa nokuxhunywa kwepahume ngaphandle kwezixhumanisi ezibanda noma amaqhugwane, okubalulekile ukuze kudlule umthwalo nokuvikela ekukhubazekeni ezindleleni zasemanzini nezimiyalelo ezinzima. Ekubunjweni kwe-caisson kanye ne-diaphragm wall, izici zokuzithiba elastically zinciphisa ukuhamba ukufaka emaphuthumeni nokunciphisa izikhathi zokuzikhangisa ezinzima ngenkathi kufinyelela amandla afanayo phakathi kwezithako ezivertical. Izikhali, izindonga ze-secant pile, nezicelo ze-soil-cement mixed-in-place (MIP) zithola izinzuzo ezinhle ze-SCC ezikhaleni ezithile zokuhlasela ezijulile nezindida ezinzima. Ama-colums okuhlinzeka ngendawo ethile kanye nezinto eziphansi ezilawulwayo (CLSM) ezifaka izinqubo ze-SCC zithuthukisa ukuhlanganisa ukufaneleka ezindaweni ezibuthakathaka noma ukuthola ukungcoliswa. Ukulethwa kwe-self-compacting concrete kucwaningwa ngezikhala ezimfica emazingeni ajwayelekile, nakuba imishini eqondile—okuhlanganisa izinhlelo zokubala izithako kanye neziqu zezivivinyo—ihlukanisa izidingo zokukhiqiza. Ukusetshenziswa endaweni kudinga ukuhlela okuphelele ngenxa yeziqhamo ezikhululekile; ama-pumps e-concrete anezinga eliphansi lokuchitha kucacisa izindlela zokufaka ezigcina ukuphakanyiswa okungeziwe ku-1.5 amamitha ukuvimbela ukuhamba okuhlukanisayo. Isikhathi sokugcina sinqunywa phakathi kwemizuzu engama-90–120 kuye ngezimiso zendawo nezezemvelo, kudinga ukuhlelwa okuqondile phakathi kokwakhiwa kombhoshisi nezinye izindawo. Abasebenzi abanolwazi kanye nezinsiza zokuhlola ukuhamba ezifakiwe zandisa ukusebenza kahle kokufaka ngenkathi kugcinwa ukuhlonza phakathi kwezithuthi eziningi. I-SCC ihlukaniswa ngamaqembu wamandla (C20–C100) kanye nezinhlelo zokuhamba (SF1–SF3, ngokusekelwe kumjikelezo wezithombe zokuhamba kanye nezilinganiso zesikhathi se-T500) ngokwezindinganiso ze-EN 206-9. Izinhlobo zihlukanisa izinhlelo ze-SCC ezisebenza kahle kakhulu ezine-silica fume noma i-metakaolin ukuze kwandiswe ukubekezelela ezindlini ze-chloride, kanye nezixubano ze-SCC ezisunguliwe eziyisebenzisela i-fly ash, i-slag, noma amagagasi aphindayo ukuze kuncishiswe i-carbon egqilaziwe ekwakheni phansi. Ukudidiyela okuqoqiwe nokungaqondile kungase kudinge izinkanyezi ezihluke ngokuphelele ezilungiselelwe amandla aphakeme (ukuphakanyiswa okukhawulelwe) noma isikhathi eside sokusebenza (okukhumbuleka). Izincwadi zezobunjiniyela ze-self-compacting concrete zidinga ukuhlola ubunzima bokwakha, ubunzima bendawo, izinga lokushisa ngesikhathi sokufaka, kanye neklasi yeziqu zokuhlala. Izidingo zokuhlola ukuskena, ukufaka ukunciphisa, nokuvikela ukubhamuka kuziqhaza ekukhetheni uhlobo lwe-cement kanye nemiyalo yezinto eziwusizo. Ukuhlaziya izindleko-nenzuzo okwenza umphakathi ufanele ukudlulisela phakathi kwemidwebo embalwa yokukhetha izinto ezihluke nomphakathi ohambisana nemiyalezo ye-geometric noma i-environmental. Ukukhiqizwa kwe-self-compacting concrete kanye nokufaka insimu kuhlangabezana ne-EN 12350-8 (test flow slump), EN 12350-9 (test ye-V-funnel), EN 12350-10 (test ye-L-box), kanye ne-ASTM C1611 kanye ne-C1621 izindinganiso zokuvivinya ukuhamba. Ukukhethwa kwezobunjiniyela kubhekisela ku-EN 1992-1-1 (Eurocode 2) kanye ne-ASTM C33 ukuze kuhlonishwe izinto, ngezingqikizi nezokuhlola ezinzima zidinga izinhlelo zokuhlala ze-EN 206-1 kanye neziqu zokuqinisa isikhathi eside ukuze kuqinisekiswe ukusebenza okuhle okwenzeka emsebenzini ohlukahlukene we-geotechnical.
Get the latest equipment listings, industry news, and market insights.