Yeyiphi imisebenzi kunye neemfuno zezinto ezahlukeneyo kwi-gypsum-based self-leveling mortar?

(1) Gypsum

Ngokwezinto ezisetyenzisiweyo ezisetyenzisiweyo, ihlulwe ibe yi-anhydrite ye-II kunye ne-α-hemihydrate gypsum. Izinto abazisebenzisayo zezi:

① Uhlobo lwe-II yegypsum engenamanzi

I-gypsum ebonakalayo okanye i-alabaster enezinga eliphezulu kunye nokuthungwa okuthambileyo kufuneka kukhethwe. Ukushisa kwe-calcination kuphakathi kwe-650 kunye ne-800 ° C, kwaye i-hydration iqhutyelwa phantsi kwesenzo se-activator.

②-Gypsum hemihydrate

-Ubuchwephesha bokuvelisa i-hemihydrate gypsum ikakhulu ibandakanya inkqubo yokuguqula eyomileyo kunye nenkqubo yokuguqula emanzi ikakhulu idibanisa ukuphelelwa ngamanzi emzimbeni kunye nokomisa.

(2) Isamente

Xa ulungiselela i-gypsum yokuziphakamisa, inani elincinci lesamente linokongezwa, kwaye imisebenzi yalo ephambili yile:

①Nikeza ngemekobume yealkaline kwimixube ethile;

② Phucula i-coefficient yokuthambisa ye-gypsum yomzimba owenziwe lukhuni;

③ Phucula ulwelo oluludaka;

④Lungisa ixesha lokumisela lohlobo Ⅱ igypsum ene-anhydrous self-leveling gypsum.

Isamente esetyenziswayo yi 42.5R Portland sement. Xa ulungiselela igypsum enemibala yokuzimela, i-samente emhlophe yasePortland ingasetyenziswa. Isixa sesamente esongeziweyo asivumelekanga ukuba sidlule kwi-15%.

(3) Ukumisela umlawuli wexesha

Kwi-self-leveling gypsum mortar, ukuba kusetyenziswe uhlobo lwe-II ye-gypsum anhydrous, i-accelerator yokumisela kufuneka isetyenziswe, kwaye ukuba i-hemihydrate gypsum isetyenzisiweyo, i-retarder yokumisela kufuneka isetyenziswe ngokubanzi.

① I-Coagulant: Iqulunqwe ngee-sulfate ezahlukeneyo kunye neetyuwa eziphindwe kabini, ezifana ne-calcium sulfate, i-ammonium sulfate, i-potassium sulfate, i-sodium sulfate kunye ne-alums ezahlukeneyo, ezifana ne-alum (i-aluminium potassium sulfate), i-red alum (i-potassium dichromate), i-bile alum ( isulfate yobhedu), njl.:

②Umnciphisi:

I-citric acid okanye i-trisodium citrate yinto esetyenziswa ngokuqhelekileyo i-gypsum retarder. Inyibilika ngokulula emanzini, inesiphumo esicacileyo sokurhoxa kunye nexabiso eliphantsi, kodwa iya kunciphisa amandla okuqina komzimba wegypsum. Ezinye i-gypsum retarders ezinokusetyenziswa ziquka: iglue, i-casin glue, i-starch residue, i-tannic acid, i-tartaric acid, njl.

(4) I-arhente yokunciphisa amanzi

Ubumanzi begypsum yokuziphakamisa ngumba ophambili. Ukuze ufumane i-gypsum slurry ene-fluidity enhle, ukwandisa ukusetyenziswa kwamanzi kuphela kuya kukhokelela ekunciphiseni amandla omzimba we-gypsum owenziwe lukhuni, kunye nokuphuma kwegazi, okuya kwenza umphezulu othambileyo, ulahlekelwe ngumgubo, kwaye awukwazi ukusetyenziswa. Ke ngoko, isinciphisi samanzi e-gypsum kufuneka saziswe ukuze kwandiswe ubumanzi be-gypsum slurry. Ii-superplasticizers ezifanelekileyo ukulungiselela i-gypsum yokuzimela ziquka i-superplasticizers esekwe kwi-naphthalene, i-polycarboxylate ephezulu-effective superplasticizers, njl.

(5) Iarhente yokugcina amanzi

Xa i-self-leveling gypsum slurry i-self-leveling, i-fluidity ye-slurry iyancitshiswa ngenxa yokufunxa kwamanzi kwisiseko. Ukuze ufumane i-gypsum slurry efanelekileyo yokuzilinganisa, ukongeza kwi-fluidity yayo ukuhlangabezana neemfuno, i-slurry kufuneka ibe nokugcinwa kakuhle kwamanzi. Kwaye ngenxa yokuba ukucoleka kunye nobunzima obuthile be-gypsum kunye nesamente kwizinto ezisisiseko zahluke kakhulu, i-slurry ithandeka kwi-delamination ngexesha lenkqubo yokuhamba kunye nenkqubo yokuqina. Ukuze ugweme ezi zinto zingasentla, kuyimfuneko ukongeza inani elincinci le-arhente yokugcina amanzi. Iiarhente zokugcina amanzi ngokuqhelekileyo zisebenzisa izinto ze-cellulose, ezifana ne-methyl cellulose, i-hydroxyethyl cellulose kunye ne-carboxypropyl cellulose.

(6) ipholima

Phucula i-abrasion, i-crack kunye nokumelana namanzi kwezixhobo zokuzilinganisa usebenzisa iipolymers ezinomgubo owenziwe ngokutsha.

(7) I-Defoamer Ukuphelisa amaqamza omoya avelisiweyo ngexesha lenkqubo yokuxuba izinto, i-tributyl phosphate isetyenziswa ngokubanzi.

(8) umfaki

Isetyenziselwa ukuphepha ukuhlukana kwezinto eziphathekayo ezizilinganisayo ukwenzela ukuba ube ne-fluidity engcono. Iifayili ezinokuthi zisetyenziswe, ezifana ne-dolomite, i-calcium carbonate, i-fly fly ash, i-slag yamanzi aphantsi komhlaba, isanti ecocekileyo, njl.

(9) Isishwankathelo esihle

Injongo yokongeza i-aggregate entle kukunciphisa ukomisa ukucutheka komzimba oqinileyo wegypsum, ukonyusa amandla angaphezulu kunye nokunxiba ukuxhathisa komzimba oqinileyo, kwaye ngokubanzi sebenzisa isanti yequartz.

Ziziphi izinto ezifunekayo kwi-gypsum self-leveling mortar?

I-β-type hemihydrate gypsum efunyenwe ngokubala i-gypsum ye-dihydrate yebanga lokuqala kunye nococeko olungaphezulu kwe-90% okanye i-α-uhlobo lwe-hemihydrate gypsum efunyenwe nge-autoclaving okanye i-hydrothermal synthesis.

I-admixture esebenzayo: izinto zokuzilinganisa zingasebenzisa i-fly ash, i-slag powder, njl njl njenge-admixtures esebenzayo, injongo kukuphucula ukuhlelwa kwezinto eziphathekayo kunye nokuphucula ukusebenza komzimba lukhuni. I-powder ye-Slag ifumana i-hydration reaction kwindawo ye-alkaline, enokuphucula ukuxinana kunye namandla kamva kwisakhiwo sezinto eziphathekayo.

Izinto ze-cementitious zangaphambili zamandla: Ukuze kuqinisekiswe ixesha lokwakha, izinto zokuziphakamisa zineemfuno ezithile zamandla okuqala (ikakhulukazi i-24h flexural and compressive strength). I-samente ye-sulphoaluminate isetyenziswa njengento yokuqala yokuqina kwesamente. I-samente ye-sulphoaluminate inesantya esikhawulezayo se-hydration kunye namandla aphezulu okuqala, anokuthi ahlangabezane neemfuno zamandla okuqala ezinto eziphathekayo.

I-alkaline activator: I-gypsum composite cementitious material inowona mandla omileyo aphakamileyo phantsi kweemeko zealkaline ephakathi. I-Quicklime kunye ne-32.5 cement ingasetyenziselwa ukulungelelanisa ixabiso le-pH ukubonelela indawo ye-alkaline ye-hydration yezinto ze-cementitious.

I-Coagulant: Ixesha lokumisela yisalathiso esibalulekileyo sokusebenza kwezinto ezizilinganisa. Ixesha elifutshane kakhulu okanye elide kakhulu alihambisani nokwakhiwa. I-coagulant ivuselela umsebenzi we-gypsum, ikhawuleza isantya se-crystallization ye-supersaturated ye-dihydrate gypsum, inciphisa ixesha lokumisela, kwaye igcina ukusetwa kunye nexesha elinzima lezinto zokuzilinganisa ngaphakathi kwinqanaba elifanelekileyo.

I-ejenti yokunciphisa amanzi: Ukuze kuphuculwe ukudibanisa kunye namandla ezinto zokuzilinganisa, kuyimfuneko ukunciphisa umlinganiselo wokubopha amanzi. Ngaphantsi kwemeko yokugcina i-fluidity efanelekileyo yezinto zokuziphakamisa, kuyimfuneko yokongeza ii-agent zokunciphisa amanzi. I-naphthalene-based based reducer yamanzi isetyenzisiweyo, kunye nendlela yokunciphisa amanzi kukuba iqela le-sulfonate kwi-molecule ye-naphthalene yokunciphisa amanzi kunye ne-molecule yamanzi idibaniswa nezibophelelo ze-hydrogen, zenza ifilimu yamanzi ezinzileyo phezu komhlaba we-gelled. izinto eziphathekayo, okwenza kube lula ukuvelisa amanzi phakathi kwezinto eziphathekayo. I-Sliding, ngaloo ndlela inciphisa inani lokuxuba amanzi afunekayo kunye nokuphucula isakhiwo somzimba onzima wezinto eziphathekayo.

I-ejenti yokugcina amanzi: izixhobo zokuzilinganisa zakhiwe phantsi, kwaye ubukhulu bokwakha buncinci, kwaye amanzi athatyathwa ngokulula kwisiseko somhlaba, okubangela ukungonelanga kwe-hydration yezinto eziphathekayo, ukuqhekeka phezu komhlaba, kunye nokunciphisa. amandla. Kolu vavanyo, i-methyl cellulose (MC) ikhethwe njenge-arhente yokugcina amanzi. I-MC ine-wettability efanelekileyo, ukugcinwa kwamanzi kunye neepropati zokwenza ifilimu, ukwenzela ukuba izinto ezizilungeleyo zingaphumi igazi kwaye zizaliswe ngokupheleleyo.

I-latex powder ekwazi ukuphinda iphindwe (emva koku ibizwa ngokuba yi-latex powder): i-latex powder inokunyusa imodyuli ye-elastic ye-self-leveling ye-self-leveling, ukuphucula ukumelana nokuqhekeka, amandla ebhondi kunye nokuxhathisa amanzi.

I-Defoamer: I-defoamer inokuphucula iimpawu ezibonakalayo zezinto ezizilungeleyo, ukunciphisa ama-bubbles xa izinto zenziwe, kwaye zibe nefuthe elithile ekuphuculeni amandla ezinto eziphathekayo.