I-desulfurization gypsum yigesi yeflue eveliswa kukutshiswa kwamafutha aqulethe isalfur (amalahle, ipetroliyam), inkunkuma eqinileyo yemizi-mveliso eveliswa ngexesha lenkqubo yokucoca i-desulfurization, kunye ne-hemihydrate gypsum (ifomyula yekhemikhali i-CaSO4· 0.5H2O), ukusebenza kwayo kuyafana noko kwenziwa yi-gypsum yokwakha yendalo. Ke ngoko, kukho uphando oluninzi kunye nokusetyenziswa kokusebenzisa i-desulfurized gypsum endaweni ye-gypsum yendalo ukuvelisa izinto ezizilinganisayo. Ii-organic polymer admixtures ezifana ne-water reducing agent, i-water retaining agent kunye ne-retarder zizinto ezibalulekileyo ezisebenzayo ekubunjweni kwezinto ze-self-leveling mortar. Ukusebenzisana kunye nendlela yokusebenza kwezi zinto zimbini kunye nezinto ze-cementitious yimicimbi efanelwe ingqalelo enye. Ngenxa yeempawu zenkqubo yokwakheka, ubuncinci be-gypsum engazilinganiyo buncinci (ubungakanani besuntswana busasazwa kakhulu phakathi kwe-40 kunye ne-60 μm), kwaye ukuhlelwa komgubo akunangqiqo, ngoko ke iipropati ze-rheological ze-desulfurized gypsum azilunganga, kwaye i-mortar slurry elungiselelwe yiyo idla ngokuba lula. Ukwahlulahlula, ukwahlulwa kunye nokopha. I-Cellulose ether yeyona nto isetyenziswa kakhulu kwi-mortar, kwaye ukusetyenziswa kwayo kunye ne-arhente yokunciphisa amanzi sisiqinisekiso esibalulekileyo sokufezekisa ukusebenza okubanzi kwezixhobo zokuzilinganisa ezisekwe kwi-gypsum ezifakwe i-sulfur ezifana nokusebenza kokwakha kunye nokusebenza koomatshini kunye nokuqina kamva.
Kule phepha, ixabiso lokutyibilika lisetyenziswa njengesalathisi solawulo (iqondo lokusasaza i-145 mm±5 mm), ligxile kwimpembelelo yomxholo we-cellulose ether kunye nobunzima be-molecular (ixabiso le-viscosity) ekusetyenzisweni kwamanzi kwezinto ezisekwe kwi-gypsum ezi-desulfurized self-leveling, ukulahleka kokutyibilika ngokuhamba kwexesha, kunye nokuxinana komoya. Umthetho wempembelelo yeempawu ezisisiseko ezifana nexesha kunye neempawu zokuqala zoomatshini; kwangaxeshanye, vavanya umthetho wempembelelo ye-cellulose ether ekukhutshweni kobushushu kunye nesantya sokukhululwa kobushushu be-gypsum hydration e-desulfurized, hlalutya impembelelo yayo kwinkqubo yokuntywiliselwa kwe-gypsum e-desulfurized, kwaye uqale uxoxe ngolu hlobo lomxube. Ukuhambelana nenkqubo ye-gypsum gelling e-desulfurization.
1. Izinto eziluhlaza kunye neendlela zovavanyo
1.1 Izinto ezisetyenziswa ngokuqhelekileyo
Umgubo weGypsum: umgubo wegypsum oyekisiwe i-sulfurized owenziwe yinkampani eseTangshan, umxube oyintloko wezimbiwa yi-hemihydrate gypsum, umxube wayo weekhemikhali uboniswe kwiTheyibhile 1, kwaye iimpawu zayo zomzimba ziboniswe kwiTheyibhile 2.
umfanekiso
umfanekiso
Izinto ezidityanisiweyo ziquka: i-cellulose ether (i-hydroxypropyl methylcellulose, i-HPMC ngamafutshane); i-superplasticizer WR; i-defoamer B-1; i-EVA redispersible latex powder S-05, zonke ezifumaneka kurhwebo.
Isixa-mali: isanti yendalo yomlambo, isanti entle eyenziwe ngokwakho ehluzwe ngesihluzo esiyi-0.6 mm.
1.2 Indlela yovavanyo
I-gypsum yokunyibilikisa i-sulfurization elungisiweyo: isanti: amanzi = 1:0.5:0.45, ubungakanani obufanelekileyo bezinye izinto ezixutyiweyo, ukunyibilika njengesalathisi solawulo (ukwandiswa kwe-145 mm ± 5 mm), ngokulungelelanisa ukusetyenziswa kwamanzi, ngokulandelelana kuxutywe nezinto zesamente (i-gypsum yokunyibilikisa i-sulfurization + iSamente) 0, 0.5‰, 1.0‰, 2.0‰, 3.0‰ i-cellulose ether (HPMC-20,000); lungisa idosi ye-cellulose ether ibe yi-1‰, khetha i-HPMC-20,000, i-HPMC-40,000, i-HPMC-75,000, kunye ne-HPMC-100,000 hydroxypropyl methylcellulose ethers ezineesisindo ezahlukeneyo ze-molecular (amanani ahambelanayo yi-H2, i-H4, i-H7.5, kunye ne-H10 ngokulandelelana), ukuze ufunde idosi kunye nobunzima be-molecular (ixabiso le-viscosity) ye-cellulose ether. Impembelelo yotshintsho kwiipropati ze-gypsum-based self-leveling mortar, kunye nempembelelo yezi zimbini kwi-fluidity, ixesha lokubeka kunye neepropati zokuqala ze-mechanical zomxube we-gypsum self-leveling mortar ziyaxoxwa. Indlela ethile yovavanyo yenziwa ngokuhambelana neemfuno ze-GB/T 17669.3-1999 "Ukumiselwa kweePropati zeMechanical ze-Gypsum yokwakha".
Uvavanyo lobushushu bokumanzisa lwenziwa kusetyenziswa isampuli engenanto yegypsum e-desulfurized kunye neesampuli ezinomxholo we-cellulose ether oyi-0.5‰ kunye no-3‰, ngokwahlukeneyo, kwaye isixhobo esisetyenzisiweyo sisivavanyeli sobushushu bokumanzisa sohlobo lwe-TA-AIR.
2. Iziphumo kunye nohlalutyo
2.1 Impembelelo yomxholo we-cellulose ether kwiimpawu ezisisiseko ze-mortar
Ngokunyuka komxholo, ukusebenza kakuhle kunye nokuhlangana komongo kuphucuke kakhulu, ukulahleka kokuhamba kwamanzi ngokuhamba kwexesha kuncitshiswe kakhulu, kwaye ukusebenza kolwakhiwo kugqwesileyo ngakumbi, kwaye umongo oqinileyo awunanto yokuqhekeka, kwaye ukuthamba komphezulu, ukuthamba kunye nobuhle kuphuculwe kakhulu. Kwangaxeshanye, ukusetyenziswa kwamanzi komongo ukuze kufunyanwe ukuthamba okufanayo kunyuke kakhulu. Kwi-5‰, ukusetyenziswa kwamanzi kunyuke nge-102%, kwaye ixesha lokugqibela lokuseta landiswa nge-100 min, eliphindwe kayi-2.5 kunesampuli engenanto. Iimpawu zokuqala zoomatshini bomongo zinciphe kakhulu ngokwanda komxholo we-cellulose ether. Xa umxholo we-cellulose ether wawuyi-5‰, amandla e-flexural eeyure ezingama-24 kunye namandla oxinzelelo anciphe ukuya kwi-18.75% kunye ne-11.29% yesampuli engenanto ngokulandelanayo. Amandla oxinzelelo yi-39.47% kunye ne-23.45% yesampuli engenanto ngokulandelanayo. Kubalulekile ukuqaphela ukuba ngokonyuka komthamo wesixhobo sokugcina amanzi, uxinano olukhulu lwesamente nalo lwehle kakhulu, ukusuka kwi-2069 kg/m3 kwi-0 ukuya kwi-1747 kg/m3 kwi-5‰, ukwehla kwe-15.56%. Uxinano lwesamente luyancipha kwaye i-porosity iyanda, enye yezizathu zokwehla okucacileyo kweempawu zoomatshini zesamente.
I-Cellulose ether yi-polymer engeyiyo i-ionic. Amaqela e-hydroxyl kwi-cellulose ether chain kunye nee-athomu ze-oksijini kwi-ether bond zinokudibana nee-molecule zamanzi ukwenza ii-hydrogen bonds, ziguqule amanzi akhululekileyo abe ngamanzi abotshelelweyo, ngaloo ndlela zidlala indima ekugcinweni kwamanzi. Ngokwe-Macroscopically Ibonakaliswa njengokwanda kokuhambelana kwe-slurry [5]. Ukwanda kwe-slurry viscosity akuyi kwandisa kuphela ukusetyenziswa kwamanzi, kodwa ne-cellulose ether enyibilikisiweyo iya kutsalwa phezu komphezulu wee-particles ze-gypsum, ithintele ukusabela kwe-hydration kwaye yongeze ixesha lokuseta; ngexesha lenkqubo yokuxuba, inani elikhulu lamaqamza omoya liya kungeniswa. I-voids iya kwakheka njengoko i-mortar iqina, ekugqibeleni inciphise amandla e-mortar. Ngokuqwalasela ngokupheleleyo ukusetyenziswa kwamanzi kwelinye icala komxube we-mortar, ukusebenza kokwakha, ixesha lokuseta kunye neempawu zoomatshini, kunye nokuqina kamva, njl.njl., umxholo we-cellulose ether kwi-mortar esekwe kwi-gypsum e-desulfurized self-leveling akufanele udlule kwi-1‰.
2.2 Impembelelo yobunzima be-molecular ye-cellulose ether ekusebenzeni kwe-mortar
Ngokwesiqhelo, okukhona i-viscosity iphezulu kwaye incinci incinci i-cellulose ether, kokukhona ukugcinwa kwamanzi kuphucuka kwaye konyuswe amandla okubopha. Ukusebenza kuya kuchaphazeleka kakubi. Ke ngoko, impembelelo yee-cellulose ethers zobunzima beemolekyuli ezahlukeneyo kwiipropati ezisisiseko zezinto zodaka ezizilinganisayo ezisekelwe kwi-gypsum yavavanywa ngakumbi. Imfuno yamanzi yodaka yanda ukuya kwinqanaba elithile, kodwa ayizange ibe nefuthe elicacileyo kwixesha lokuseta kunye nokugeleza. Kwangaxeshanye, amandla okuguquguquka kunye nokucinezelwa kodaka kumazwe ahlukeneyo abonise ukuhla, kodwa ukwehla kwakuncinci kakhulu kunempembelelo yomxholo we-cellulose ether kwiipropati zoomatshini. Ngamafutshane, ukunyuka kobunzima beemolekyuli ze-cellulose ether akunampembelelo icacileyo ekusebenzeni kwemixube yodaka. Ukuqwalasela ukulula kokwakhiwa, i-cellulose ether ene-viscosity ephantsi kunye ne-cellulose ether encinci kufuneka ikhethwe njengezixhobo zokuzilinganisa ezisekelwe kwi-gypsum ezi-desulfurized.
2.3 Impembelelo ye-cellulose ether kubushushu bokufuma kwe-gypsum e-desulfurised
Njengoko umxholo we-cellulose ether wawukhula, incochoyi ye-exothermic yokufunxwa kwe-gypsum e-desulfurised yehla kancinci, kwaye ixesha lendawo ephezulu lalibazisekile kancinci, ngelixa ubushushu be-exothermic bokufunxwa kwe-hydration behla, kodwa kungabonakali. Oku kubonisa ukuba i-cellulose ether inokulibazisa izinga lokufunxwa kwe-hydration kunye nenqanaba lokufunxwa kwe-gypsum e-desulfurised ukuya kwinqanaba elithile, ngoko ke umthamo akufuneki ube mkhulu kakhulu, kwaye kufuneka ulawulwe ngaphakathi kwe-1‰. Kuyabonakala ukuba ifilimu ye-colloidal eyenziwe emva kokuba i-cellulose ether idibana namanzi ifunxwa phezu kwamasuntswana e-gypsum e-desulfurised, nto leyo enciphisa izinga lokufunxwa kwe-gypsum ngaphambi kweeyure ezi-2. Kwangaxeshanye, ukugcinwa kwamanzi kunye neziphumo zayo zokutyeba ziyalibazisa ukufuma kwamanzi amdaka kwaye i-Dissipation iluncedo ekufunxweni ngakumbi kwe-gypsum e-desulfurised kwinqanaba lokugqibela. Ukuqukumbela, xa umthamo ofanelekileyo ulawulwa, i-cellulose ether inempembelelo encinci kwizinga lokufunxwa kwe-hydration kunye nenqanaba lokufunxwa kwe-gypsum e-desulfurised ngokwayo. Kwangaxeshanye, ukunyuka komxholo we-cellulose ether kunye nobunzima be-molecular kuya kwandisa kakhulu i-viscosity ye-slurry kwaye kubonise ukusebenza okuhle kokugcinwa kwamanzi. Ukuze kuqinisekiswe ukuba i-drywall ye-gypsum self-leveling mortar inyibilikisiwe, ukusetyenziswa kwamanzi kuya kwanda kakhulu, okubangelwa lixesha elide lokuseta i-mortar. Isizathu esiphambili sokwehla kweempawu zoomatshini.
3. Isiphelo
(1) Xa kusetyenziswa ulwelo njengesalathisi solawulo, ngokonyuka komxholo we-cellulose ether, ixesha lokuseta i-desulfurized gypsum-based self-leveling mortar lihlala ixesha elide kakhulu, kwaye iimpawu zoomatshini ziyancipha kakhulu; xa kuthelekiswa nomxholo, ubunzima be-molecular be-cellulose ether Ukwanda akunampembelelo ingako kwiipropati ezingentla ze-mortar. Xa ucinga ngokupheleleyo, i-cellulose ether kufuneka ikhethwe ngobunzima obuncinci be-molecular (ixabiso le-viscosity elingaphantsi kwe-20 000 Pa·s), kwaye idosi kufuneka ilawulwe ngaphakathi kwe-1‰ yezinto ezisetyenziswa ngesamente.
(2) Iziphumo zovavanyo lobushushu bokufuma kwe-gypsum e-desulfurized zibonisa ukuba ngaphakathi kolu vavanyo, i-cellulose ether inempembelelo encinci kwisantya sofuma kunye nenkqubo yokufuma kwe-gypsum e-desulfurized. Ukwanda kokusetyenziswa kwamanzi kunye nokwehla kobuninzi bezinto zezona zizathu ziphambili zokwehla kweempawu zoomatshini ze-drywall esekwe kwi-gypsum e-desulfurized.
Ixesha lokuthumela: Meyi-08-2023