I-Self-Compacting Concrete (SCC) yiteknoloji yanamhlanje yekhonkrithi ehamba phantsi kobunzima bayo ukuzalisa ifom ngaphandle kwesidingo sokungcangcazela koomatshini. Iingenelo zayo ziquka ukuphucula ukusebenza, ukunciphisa iindleko zomsebenzi, kunye nokusebenza kakuhle kwesakhiwo. Ukufezekisa ezi mpawu kufuna ulawulo oluchanekileyo lomxube, rhoqo ngoncedo lwe-admixtures ezifana neHydroxypropyl Methylcellulose (HPMC). Le cellulose ether polymer idlala indima ebalulekileyo ekuguquleni iipropati ze-rheological ze-SCC, ukuphucula uzinzo lwayo kunye neempawu zokuhamba.
Iipropati kunye nemisebenzi ye-HPMC
IHydroxypropyl Methylcellulose (HPMC) yipolymer engeyiyo ionic, enyibilikayo emanzini ephuma kwicellulose. Iimpawu zayo eziphambili ziquka:
Ukuguqulwa kobungqindilili: I-HPMC yonyusa ubungqindilili bezisombululo zamanzi, iphucula ubunjani be-thixotropic bomxube wekhonkrithi.
Ukugcinwa Kwamanzi: Inezakhono ezibalaseleyo zokugcina amanzi, ezinceda ukugcina ukusebenza kakuhle kwekhonkrithi ngokunciphisa ukufuma kwamanzi.
Ukuncamathela kunye nokuBambana: I-HPMC iphucula ukubopha phakathi kwezigaba ezahlukeneyo kwikhonkrithi, iphucula iimpawu zayo zokubambisana.
Ukuphucula Uzinzo: Kuzinzisa ukumiswa kwee-aggregates kumxube, kunciphisa ukwahlulwahlulwa kunye nokopha.
Ezi mpawu zenza i-HPMC ibe sisongezelelo esibalulekileyo kwi-SCC, njengoko ijongana nemingeni eqhelekileyo efana nokwahlulwahlulwa, ukopha, kunye nokugcina ukuhamba kwamanzi okufunekayo ngaphandle kokuphazamisa uzinzo.
Indima ye-HPMC kwiConcrete eziZixinayo
1. Ukuphuculwa Kokusebenza Kakuhle
Umsebenzi oyintloko we-HPMC kwi-SCC kukuphucula ukusebenza kwayo ngokwandisa i-viscosity yomxube. Olu tshintsho luvumela i-SCC ukuba ihambe ngokulula phantsi kobunzima bayo, izalise iifom ezintsonkothileyo kwaye ifikelele kwinqanaba eliphezulu lokuxinana ngaphandle kwesidingo sokungcangcazela. I-HPMC iqinisekisa ukuba ikhonkrithi ihlala isebenza ixesha elide, nto leyo eluncedo ngakumbi kwii-discharge ezinkulu okanye ezinzima.
Ukukwazi ukuhambahamba: I-HPMC inegalelo kwiipropati ze-thixotropic zomxube, ivumela ukuba uhlale umanzi xa uxutyiwe kodwa ube mkhulu xa umile. Olu hlobo lokuziphatha luxhasa iimpawu ze-SCC zokuzilinganisa, ukuqinisekisa ukuba ihamba kakuhle ukuzalisa iimolds kwaye igqume imivalo yokuqinisa ngaphandle kokwahlulahlula.
Ukungaguquguquki: Ngokulawula i-viscosity, i-HPMC inceda ukugcina ukuhambelana okufanayo kulo lonke umxube, ukuqinisekisa ukuba iqela ngalinye le-SCC libonisa ukusebenza okufanayo ngokubhekiselele ekuhambeni nasekuzinzeni.
2. Ukwahlulwahlulwa kunye noLawulo lokopha
Ukwahlulwahlulwa (ukwahlulwa kwezinto ezidityanisiweyo kwintlama yesamente) kunye nokopha (amanzi anyuka aye kumphezulu) zizinto ezibalulekileyo kwi-SCC. Ezi zinto zinokuphazamisa ulwakhiwo kunye nokugqitywa komphezulu wesamente.
Umxube Ofanayo: Amandla e-HPMC okwandisa i-viscosity ye-samente paste anciphisa ukuhamba kwamanzi kunye nee-aggregates, ngaloo ndlela kunciphisa umngcipheko wokuhlukaniswa.
Ukopha Okunciphileyo: Ngokugcina amanzi ngaphakathi komxube, i-HPMC inceda ekuthinteleni ukopha. Oku kugcinwa kwamanzi kuqinisekisa ukuba inkqubo yokufunxa amanzi iyaqhubeka ngempumelelo, iphucula uphuhliso lwamandla kunye nokuqina kwekhonkrithi.
3. Uzinzo oluphuculweyo
I-HPMC inegalelo ekuzinzeni kwe-SCC ngokuphucula ukuhlangana phakathi kwamasuntswana kumxube. Olu zinzo luphuculweyo lubalulekile ekugcineni ukusasazwa okufanayo kwee-aggregates kunye nokuthintela ukwakheka kweendawo ezingenanto okanye iindawo ezibuthathaka.
Ubumbano: Indlela yokuncamathelisa ye-HPMC ikhuthaza ukubopha okungcono phakathi kwamasuntswana esamente kunye nee-aggregates, nto leyo ephumela kumxube odibeneyo omelana nokwahlulwahlulwa.
Uzinzo: I-HPMC izinzisa ulwakhiwo lwekhonkrithi, ivumela ukusasazwa ngokulinganayo kwee-aggregates kwaye ithintele ukwakheka kwe-laitance (umaleko obuthathaka wesamente kunye namaqhekeza amancinci kumphezulu).
Impembelelo kwiipropati zoomatshini
1. Amandla oxinzelelo
Impembelelo ye-HPMC kumandla okuxinwa kwe-SCC ngokubanzi ilungile. Ngokuthintela ukwahlulwahlulwa kunye nokuqinisekisa umxube ofanayo, i-HPMC inceda ukugcina ukuthembeka kwesakhiwo sekhonkrithi, nto leyo ekhokelela kwiimpawu zokuqina ezingcono.
Ukufunxa: Ukugcinwa kwamanzi okwandisiweyo kuqinisekisa ukufunxa okupheleleyo kwamasuntswana esamente, okufaka isandla ekuphuhlisweni kwe-matrix eqinileyo.
Uxinano Olufanayo: Ukuthintela ukwahlulwahlulwa kubangela ukuba kubekho usasazo olufanayo lwee-aggregates, oluxhasa amandla aphezulu okuxinzelela kwaye lunciphise umngcipheko wamanqaku abuthathaka.
2. Ukuqina
Ukusetyenziswa kwe-HPMC kwi-SCC kuphucula ukuqina kwayo ngokuqinisekisa ukuba incinci kwaye ifana ngakumbi.
Ukungangeni kakuhle kwamanzi: Ukuhambelana okuphuculweyo kunye nokopha okunciphileyo kunciphisa ukungena kwamanzi kwikhonkrithi, kwandisa ukumelana kwayo nezinto ezingqongileyo ezifana nemijikelo yokuqandisa, ukuhlaselwa ngamakhemikhali, kunye ne-carbonation.
Ukugqitywa Komphezulu Ophuculiweyo: Ukuthintela ukopha kunye nokwahlulahlula kuqinisekisa ukugqitywa komphezulu okubushelelezi nokuqina ngakumbi, okungaxhaphakanga kakhulu ekuqhekekeni nasekukhubekeni.
Izinto ekufuneka ziqwalaselwe xa kusenziwa isicelo kunye nomthamo
Ukusebenza kakuhle kwe-HPMC kwi-SCC kuxhomekeke kwidosi yayo kunye neemfuno ezithile zomxube. Amanani aqhelekileyo edosi aqala kwi-0.1% ukuya kwi-0.5% yobunzima besamente, kuxhomekeke kwiimpawu ezifunwayo kunye neempawu zezinye izinto ezikumxube.
Uyilo lweMix: Uyilo lomxube olucokisekileyo lubalulekile ukuze kuphuculwe iingenelo ze-HPMC. Izinto ezifana nohlobo lwe-aggregate, umxholo wesamente, kunye nezinye izinto ezixutyiweyo maziqwalaselwe ukuze kufezekiswe ibhalansi efunekayo yokusebenza, uzinzo, kunye namandla.
Ukuhambelana: I-HPMC kufuneka ihambelane nezinye izinto ezixutyiweyo ezisetyenziswa kumxube, ezifana nee-superplasticizers kunye nezinciphisi zamanzi, ukuze kuthintelwe ukusebenzisana okubi okunokuphazamisa ukusebenza kwe-SCC.
IHydroxypropyl Methylcellulose (HPMC) idlala indima ebalulekileyo ekuphuculeni ukusebenza kweSelf-Compacting Concrete (SCC). Amandla ayo okuguqula i-viscosity, ukuphucula ukugcinwa kwamanzi, kunye nokuzinzisa umxube ajongana nemingeni ephambili kwimveliso ye-SCC, kubandakanya ukwahlukanisa, ukopha, kunye nokugcina ukuhamba kwamanzi kuhambela kakuhle. Ukufakwa kwe-HPMC kwi-SCC kubangela umxube wekhonkrithi osebenza ngakumbi, ozinzileyo, nohlala ixesha elide, okwenza ukuba ube sisongezelelo esixabisekileyo kwizicelo zekhonkrithi zanamhlanje. Umlinganiselo ofanelekileyo kunye noyilo lomxube kubalulekile ukuze kusetyenziswe izibonelelo ezipheleleyo ze-HPMC, ukuqinisekisa ukuba i-SCC iyahlangabezana nemigangatho ethile yokusebenza efunekayo kwiiprojekthi ezahlukeneyo zokwakha.
Ixesha leposi: Juni-18-2024