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) ukungezwa kwe-cellulose ether akunawo umthelela osobala emandleni okucindezela odaka lwezinsuku ezingama-28, kodwa ukwengezwa 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 neziphumelelayo 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 okucindezela odaka lwezinsuku ezingama-28, kodwa ukungezwa kwe-HPMC2000 kunomphumela omubi osobala kakhulu emandleni okuqala odaka.

I-HPMC2000 inamadigri ahlukene okuwohloka emandleni aguquguqukayo odaka, kungakhathaliseki ukuthi kusesigabeni sokuqala (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.