I-cellulose ether odakeni lwesihlabathi se-slag

Ukusebenzisa i-P·II 52.5 grade usimende njengezinto zikasimende kanye nesihlabathi se-slag sensimbi njengenhlanganisela enhle, isihlabathi se-slag sensimbi esine-fluidity ephezulu namandla aphezulu silungiswa ngokungeza izithasiselo zamakhemikhali ezifana nokunciphisa amanzi, i-latex powder kanye ne-defoamer Udaka olukhethekile, kanye nemiphumela yezinto ezimbili ezihlukene. ama-viscosities (2000mPa·s kanye ne-6000mPa·s) ye-hydroxypropyl methylcellulose ether (HPMC) ekugcinweni kwayo kwamanzi, uketshezi kanye namandla kwacwaningwa.Imiphumela ibonisa ukuthi: (1) Kokubili i-HPMC2000 ne-HPMC6000 ingakhuphula kakhulu izinga lokugcinwa kwamanzi odaka olusanda kuxutshwa futhi kuthuthukise ukusebenza kwayo kokugcinwa kwamanzi;(2) Uma okuqukethwe kwe-cellulose ether kuphansi, umthelela ku-fluidity of the mortar awubonakali.Uma inyuswa ibe ngu-0.25% noma ngaphezulu, iba nomthelela othile wokuwohloka ku-fluidity of the mortar, lapho umphumela wokuwohloka we-HPMC6000 ubonakala kakhudlwana;(3) ukwengezwa kwe-cellulose ether akunawo umthelela osobala emandleni okucindezela odaka lwezinsuku ezingama-28, kodwa ukungezwa kwe-HPMC2000 Isikhathi esingalungile, ngokusobala akukuhle kumandla aguquguqukayo weminyaka ehlukene, futhi ngesikhathi esifanayo kunciphisa kakhulu. ekuqaleni (izinsuku ezingu-3 nezinsuku ezingu-7) amandla okucindezela odaka;(4) Ukwengezwa kwe-HPMC6000 kunomthelela othile emandleni aguquguqukayo eminyaka ehlukene , kodwa ukuncipha bekungaphansi kakhulu kwalokho kwe-HPMC2000.Kuleli phepha, kubhekwa ukuthi i-HPMC6000 kufanele ikhethwe lapho ilungiselela udaka olukhethekile lwesihlabathi se-slag esine-fluidity ephezulu, izinga eliphezulu lokugcinwa kwamanzi namandla aphezulu, futhi umthamo akufanele ube mkhulu kuno-0.20%.

Amagama angukhiye:isihlabathi se-steel slag;i-cellulose ether;i-viscosity;ukusebenza kahle;amandla

isingeniso

I-Slag yensimbi ingumkhiqizo wokukhiqizwa kwensimbi.Ngokuthuthukiswa kwemboni yensimbi nensimbi, ukukhishwa kwaminyaka yonke kwe-slag yensimbi kuye kwanda ngamathani angaba yizigidi ezingu-100 eminyakeni yamuva, futhi inkinga yokugcinwa kwempahla ngenxa yokwehluleka kokusetshenziswa kwezinsiza ngesikhathi inzima kakhulu.Ngakho-ke, ukusetshenziswa kwezinsiza kanye nokulahlwa kwe-slag yensimbi ngokusebenzisa izindlela zesayensi nezisebenzayo kuyinkinga engenakunakwa.I-Slag yensimbi inezici zokuminyana okuphezulu, ukuthungwa okuqinile namandla acindezelayo aphezulu, futhi ingasetshenziswa esikhundleni sesihlabathi semvelo odakeni lukasimende noma ukhonkolo.I-Slag yensimbi nayo inokuphinda isebenze okuthile.I-slag yensimbi igaywa ibe yimpushana ethile (i-steel slag powder).Ngemva kokuxutshwa kukhonkolo, ingaba nomphumela we-pozzolanic, osiza ukuthuthukisa amandla e-slurry futhi uthuthukise ukuguqulwa kwesixhumi esibonakalayo phakathi kwe-aggregate yekhonkrithi kanye ne-slurry.endaweni, ngaleyo ndlela ukwandisa amandla ukhonkolo.Kodwa-ke, kufanele kuqashelwe ukuthi i-slag yensimbi ekhishwe ngaphandle kwanoma yiziphi izinyathelo, i-calcium oxide yangaphakathi yamahhala, i-magnesium oxide yamahhala kanye nesigaba se-RO kuzodala ukuqina komthamo ompofu we-slag yensimbi, okukhawulela kakhulu ukusetshenziswa kwe-slag yensimbi njengama-coarse futhi ama-aggregates amahle.Isicelo odakeni lukasimende noma ukhonkolo.Wang Yuji et al.kafushane izinqubo ezahlukene zokwelashwa kwe-slag yensimbi futhi yathola ukuthi i-slag yensimbi ephathwa ngendlela yokugxusha eshisayo inokusimama okuhle futhi ingaqeda inkinga yayo yokunweba kukhonkolo kasimende, futhi inqubo yokwelapha eshisayo yaqalwa e-Shanghai No. 3 Iron and Steel Plant for the okokuqala.Ngaphandle kwenkinga yokuzinza, ama-slag aggregates ensimbi anezimpawu zama-pores ama-rough, ama-angles amaningi, kanye nenani elincane lemikhiqizo ye-hydration ebusweni.Uma isetshenziswa njengezihlanganisi ukulungisa udaka nokhonkolo, ukusebenza kwazo ngokuvamile kuyathinteka.Njengamanje, ngaphansi kwesisekelo sokuqinisekisa ukuzinza kwevolumu, ukusebenzisa i-slag yensimbi njenge-aggregate enhle ukulungisa udaka olukhethekile kuyisiqondiso esibalulekile sokusetshenziswa kwensiza ye-slag yensimbi.Ucwaningo luthole ukuthi ukwengeza isinciphisi samanzi, impushana ye-latex, i-cellulose ether, i-ejenti yokungenisa umoya kanye ne-defoamer odakeni lwesihlabathi se-steel slag kungathuthukisa ukusebenza kwengxube nokusebenza okuqinile kodaka lwesihlabathi se-slag njengoba kudingeka.Umbhali usebenzise izilinganiso zokwengeza i-latex powder nezinye izixube ukuze kulungiswe udaka lokulungisa insimbi ye-slag.Ekukhiqizeni nasekusetshenzisweni kodaka, i-cellulose ether iyingxube yamakhemikhali evame kakhulu.Ama-cellulose ether asetshenziswa kakhulu odakeni yi-hydroxypropyl methyl cellulose ether (HPMC) kanye ne-hydroxyethyl methyl cellulose ether (HEMC).) Linda.I-cellulose ether ingathuthukisa ukusebenza kodaka ngezinga elikhulu, njengokunikeza udaka ukugcinwa kwamanzi okuhle kakhulu ngokujiya, kodwa ukwengeza i-cellulose ether kuzophinde kuthinte uketshezi, okuqukethwe komoya, isikhathi sokusetha nokuqina kodaka.Izakhiwo ezihlukahlukene.

Ukuze uqondise kangcono ukuthuthukiswa kanye nokusetshenziswa kwensimbi ye-slag sand mortar, ngesisekelo somsebenzi wangaphambilini wocwaningo mayelana nodaka lwesihlabathi se-steel slag, leli phepha lisebenzisa izinhlobo ezimbili zama-viscosities (2000mPa).·s kanye ne-6000mPa·s) ye-hydroxypropyl methyl cellulose ether (HPMC) Yenza ucwaningo lokuhlola ngomthelela we-steel slag sand udaka olunamandla aphezulu ekusebenzeni kokusebenza (uketshezi nokugcinwa kwamanzi) namandla acindezelayo kanye nokuguquguquka.

1. Ingxenye yokuhlola

1.1 Izinto ezisetshenziswayo

Usimende: Onoda P·II 52.5 grade usimende.

Isihlabathi se-steel slag: I-slag yensimbi yokuguqulela ekhiqizwa yi-Shanghai Baosteel icutshungulwa inqubo yokugxusha eshisayo, enobuningi obungu-1910kg/m³, eyesihlabathi esimaphakathi, kanye ne-fineness modulus engu-2.3.

Isinciphisi samanzi: isinciphisi samanzi se-polycarboxylate (i-PC) esikhiqizwe i-Shanghai Gaotie Chemical Co., Ltd., ngendlela eyimpuphu.

I-Latex powder: Imodeli 5010N inikezwe i-Wacker Chemicals (China) Co., Ltd.

I-Defoamer: Umkhiqizo we-Code P803 ohlinzekwa yi-German Mingling Chemical Group, impushana, ukuminyana 340kg/m³, isikali esimpunga 34% (800°C), inani le-pH elingu-7.2 (20°C DIN ISO 976, 1% EDIST, amanzi).

I-Cellulose ether: i-hydroxypropyl methylcellulose ether ehlinzekwa nguInkampani Kima Chemical Co., Ltd., leyo ene-viscosity engu-2000mPa·s iqokwe njenge-HPMC2000, futhi leyo ene-viscosity engu-6000mPa·s iqokwe njenge-HPMC6000.

Ukuxuba amanzi: amanzi ampompi.

1.2 Isilinganiso sokuhlola

Isilinganiso sikasimende nesihlabathi sodaka lwensimbi lwe-slag-sand esalungiswa ekuqaleni kokuhlolwa sasingu-1: 3 (isilinganiso sobuningi), isilinganiso samanzi nosimende sasingu-0.50 (isilinganiso sobuningi), kanti umthamo we-polycarboxylate superplasticizer wawungu-0.25% (iphesenti lesisindo sikasimende, okufanayo ngezansi. ), okuqukethwe kwe-latex powder kungu-2.0%, futhi okuqukethwe kwe-defoamer kungu-0.08%.Ngokuhlolwa okuqhathanisayo, imithamo yama-ether amabili e-cellulose HPMC2000 kanye ne-HPMC6000 yayingu-0.15%, 0.20%, 0.25% kanye no-0.30%, ngokulandelana.

1.3 Indlela yokuhlola

Indlela Yokuhlola I-Mortar Fluidity: lungisa udaka ngokuya nge-GB/T 17671-1999 “Cement Mortar Strength Test (ISO Method)”, sebenzisa isikhunta sokuhlola ku-GB/T2419-2005 “Indlela Yokuhlola Uketshezi Lwesimende”, bese uxova Thela udaka oluhle. esikhunjini sokuhlola ngokushesha, sula udaka oludlulele nge-scraper, phakamisa isikhunta sokuhlola sibheke phezulu, futhi lapho udaka lungasagelezi, linganisa ububanzi obukhulu bendawo yokusabalalisa yodaka kanye nobubanzi ohlangothini oluqondile, futhi thatha inani eliphakathi, umphumela unembile ku-5mm.

Ukuhlolwa kwezinga lokugcinwa kwamanzi kodaka kwenziwa ngokwendlela eshiwo ku-JGJ/T 70-2009 “Izindlela Zokuhlola Izakhiwo Eziyisisekelo Zodaka Lokwakha”.

Ukuhlolwa kwamandla okucindezela kanye namandla aguquguqukayo odaka kwenziwa ngokwendlela echazwe ku-GB/T 17671-1999, futhi iminyaka yokuhlola yizinsuku ezi-3, izinsuku eziyi-7 nezinsuku ezingama-28 ngokulandelana.

2. Imiphumela kanye nengxoxo

2.1 Umthelela we-cellulose ether ekusebenzeni kokusebenza kwensimbi ye-slag sand mortar

Kusukela kumphumela wokuqukethwe okuhlukile kwe-cellulose ether ekugcinweni kwamanzi odaka lwe-steel slag sand, kungabonakala ukuthi ukwengeza i-HPMC2000 noma i-HPMC6000 kungathuthukisa kakhulu ukugcinwa kwamanzi kodaka olusanda kuxutshwa.Ngokunyuka kokuqukethwe kwe-cellulose ether, izinga lokugcinwa kwamanzi odaka landa kakhulu futhi lahlala lizinzile.Phakathi kwazo, lapho okuqukethwe kwe-cellulose ether kungu-0.15% kuphela, izinga lokugcinwa kwamanzi odaka likhuphuka cishe ngo-10% uma kuqhathaniswa nalokho ngaphandle kokwengeza, kufinyelela ku-96%;lapho okuqukethwe kukhushulwa ku-0.30%, izinga lokugcinwa kwamanzi odaka liphezulu njenge-98.5%.Kungabonakala ukuthi ukungezwa kwe-cellulose ether kungathuthukisa kakhulu ukugcinwa kwamanzi kodaka.

Kusukela ethonyeni lemithamo ehlukene ye-cellulose ether ku-fluidity yensimbi ye-slag sand mortar, kungabonakala ukuthi lapho umthamo we-cellulose ether ungu-0.15% no-0.20%, awunawo umphumela osobala ku-fluidity of mortar;lapho umthamo ukhuphuka ufike ku-0.25% noma ngaphezulu, unomthelela omkhulu ku-fluidity, kodwa uketshezi kusengagcinwa ku-260mm nangaphezulu;lapho ama-ether amabili e-cellulose esenani elifanayo, uma kuqhathaniswa ne-HPMC2000, umthelela ongemuhle we-HPMC6000 ku-fluidity yodaka ubonakala kakhudlwana.

I-Hydroxypropyl methyl cellulose ether iyi-polymer engeyona i-ionic enokugcinwa kahle kwamanzi, futhi phakathi kwebanga elithile, i-viscosity enkulu, ukugcinwa kwamanzi okungcono kanye nomphumela osobala kakhulu wokujiya.Isizathu siwukuthi iqembu le-hydroxyl echungechungeni lalo lamangqamuzana kanye ne-athomu ye-oksijini ku-ether bond lingakha izibopho ze-hydrogen nama-molecule amanzi, okwenza amanzi amahhala abe amanzi abophekile.Ngakho-ke, esikalini esifanayo, i-HPMC6000 ingakhuphula i-viscosity yodaka ngaphezu kwe-HPMC2000, inciphise uketshezi lodaka, futhi ikhulise izinga lokugcinwa kwamanzi ngokusobala.Idokhumenti 10 ichaza lesi senzakalo esingenhla ngokwenza isixazululo se-viscoelastic ngemva kokuchithwa kwe-cellulose ether emanzini, futhi ibonise izici zokugeleza ngokuguqulwa.Kungacatshangwa ukuthi i-steel slag mortar elungiselelwe kuleli phepha ine-fluidity enkulu, engafinyelela ku-295mm ngaphandle kokuxuba, futhi ukuguqulwa kwayo kukhulu kakhulu.Uma i-cellulose ether ingeziwe, i-slurry izohamba ngokugeleza kwe-viscous, futhi ikhono layo lokubuyisela isimo lincane, ngakho-ke kuholela ekunciphiseni kokuhamba.

2.2 Umthelela we-cellulose ether emandleni ensimbi ye-slag sand mortar

Ukwengezwa kwe-cellulose ether akuthinti kuphela ukusebenza kokusebenza kwe-steel slag sand mortar, kodwa futhi kuthinta izakhiwo zayo zemishini.

Kusukela kumphumela wemithamo ehlukene ye-cellulose ether emandleni acindezelayo odaka lwe-steel slag sand, kungabonakala ukuthi ngemva kokwengeza i-HPMC2000 ne-HPMC6000, amandla okucindezela odaka esikalini ngasinye ayanda ngokuya ngeminyaka.Ukwengeza i-HPMC2000 akunawo umthelela osobala emandleni okucindezela odaka lwezinsuku ezingama-28, futhi ukuguquguquka kwamandla akukukhulu;kuyilapho i-HPMC2000 inomphumela omkhulu emandleni okuqala (izinsuku ezi-3 nezinsuku ezingu-7), okubonisa umkhuba wokwehla okusobala, nakuba umthamo ukhuphuka ube ngu-0.25% naPhezulu, amandla okucindezela okuqala anda kancane, kodwa asephansi kunalokho ngaphandle kwalokho. enezela.Uma okuqukethwe kwe-HPMC6000 kungaphansi kuka-0.20%, umthelela kumandla okucindezela wezinsuku ezingu-7 nezinsuku ezingu-28 awubonakali, futhi amandla okucindezela ezinsuku ezingu-3 ehla kancane.Lapho okuqukethwe kwe-HPMC6000 kukhuphukela ku-0.25% nangaphezulu, amandla ezinsuku ezingama-28 anda ngezinga elithile, bese ehla;amandla ezinsuku ezingu-7 ancipha, abese ehlala ezinzile;amandla ezinsuku ezi-3 ehle ngendlela ezinzile.Ngakho-ke, kungacatshangwa ukuthi ama-cellulose ether anama-viscosity amabili we-HPMC2000 kanye ne-HPMC6000 awanawo umphumela wokuwohloka osobala emandleni odaka ezinsuku ezingama-28, kodwa ukungezwa kwe-HPMC2000 kunomphumela omubi osobala kakhulu emandleni okuqala odaka.

I-HPMC2000 inamadigri ahlukene okuwohloka emandleni aguquguqukayo odaka, kungakhathaliseki ukuthi kusesigabeni sakuqala (izinsuku ezi-3 nezinsuku ezingu-7) noma isigaba sakamuva (izinsuku ezingu-28).Ukwengezwa kwe-HPMC6000 nakho kunezinga elithile lomthelela omubi emandleni aguquguqukayo odaka, kodwa izinga lomthelela lincane kunalelo le-HPMC2000.

Ngaphezu komsebenzi wokugcinwa kwamanzi nokuqina, i-cellulose ether iphinde ibambezele inqubo ye-hydration kasimende.Ikakhulukazi ngenxa yokukhanyiswa kwama-molecule e-cellulose ether emikhiqizweni kasimende ye-hydration, njenge-calcium silicate hydrate gel kanye ne-Ca(OH)2, ukwenza isendlalelo sokumboza;ngaphezu kwalokho, i-viscosity yesisombululo se-pore iyanda, futhi i-cellulose ether ivimbela Ukufuduka kwe-Ca2 + ne-SO42- kusixazululo se-pore kulibazisa inqubo ye-hydration.Ngakho-ke, amandla okuqala (izinsuku ezi-3 nezinsuku ezingu-7) zodaka oluxutshwe ne-HPMC ancishisiwe.

Ukwengeza i-cellulose ether odakeni kuzokwakha inani elikhulu lamabhamuza amakhulu anobubanzi obungu-0.5-3mm ngenxa yomphumela wokungenisa umoya we-cellulose ether, futhi ulwelwesi lwe-cellulose ether ulwelwesi lukhangisiwe phezu kwalawa mabhamuza, okuthi a izinga elithile lidlala indima ekusimamiseni amabhamuza.indima, ngaleyo ndlela yenza buthaka umphumela we-defoamer odakeni.Nakuba amabhamuza omoya akhiwe afana nama-ball bears odakeni olusanda kuxutshwa, okuthuthukisa ukusebenza kahle, uma udaka seluqinile futhi luqinile, amabhamuza omoya amaningi ahlala odakeni ukuze akhe izimbotshana ezizimele, okunciphisa ukuminyana okusobala kodaka. .Amandla acindezelayo namandla okuguquguquka ayancipha ngokufanele.

Kungabonakala ukuthi lapho ulungiselela insimbi ye-slag isihlabathi esikhethekile esine-fluidity ephezulu, izinga eliphezulu lokugcinwa kwamanzi namandla aphezulu, kunconywa ukusebenzisa i-HPMC6000, futhi umthamo akufanele ube mkhulu kuno-0.20%.

Ekuphetheni

Imiphumela yama-viscosities amabili e-cellulose ethers (HPMC200 kanye ne-HPMC6000) ekugcinweni kwamanzi, uketshezi, amandla okucindezela kanye nokuguquguquka kwensimbi ye-slag sand mortar yacwaningwa ngokuhlolwa, futhi indlela yokusebenza ye-cellulose ether ku-steel slag sand mortar yahlaziywa.Iziphetho ezilandelayo:

(1) Ngaphandle kokwengeza i-HPMC2000 noma i-HPMC6000, izinga lokugcinwa kwamanzi odaka lwesanti lwensimbi olusanda kuxutshwa lungathuthukiswa kakhulu, futhi nokusebenza kwalo kokugcinwa kwamanzi kungathuthukiswa.

(2) Uma umthamo ungaphansi kuka-0.20%, umphumela wokwengeza i-HPMC2000 ne-HPMC6000 ku-fluidity yensimbi ye-slag sand mortar awubonakali.Uma okuqukethwe kukhuphukela ku-0.25% nangaphezulu, i-HPMC2000 ne-HPMC6000 zinomthelela othile omubi ku-fluidity yensimbi ye-slag sand mortar, futhi umthelela omubi we-HPMC6000 ubonakala kakhudlwana.

(3) Ukwengezwa kwe-HPMC2000 kanye ne-HPMC6000 akunawo umthelela osobala emandleni okucindezela ezinsuku ezingama-28 odaka lwesihlabathi se-steel slag, kodwa i-HPMC2000 inomphumela omubi kakhulu emandleni okudala acindezelayo odaka, futhi amandla okugoba nawo ngokusobala awamukeleki.Ukwengezwa kwe-HPMC6000 kunomphumela othile omubi emandleni aguquguqukayo ensimbi ye-slag-sand mortar kuyo yonke iminyaka, kodwa izinga lomphumela liphansi kakhulu kunalelo le-HPMC2000.