Iyini imisebenzi kanye nezidingo zezinto ezihlukahlukene ku-gypsum-based self-leveling mortar?

(1) Gypsum

Ngokwezinto zokusetshenziswa ezisetshenzisiwe, ihlukaniswe ngohlobo lwe-II anhydrite kanye ne-α-hemihydrate gypsum. Izinto abazisebenzisayo yilezi:

① Uhlobo lwe-II lwe-anhydrous gypsum

I-gypsum esobala noma i-alabaster enezinga eliphezulu nokuthungwa okuthambile kufanele kukhethwe. Izinga lokushisa lokubala liphakathi kuka-650 no-800 ° C, futhi i-hydration yenziwa ngaphansi kwesenzo se-activator.

②-Gypsum hemihydrate

-Ubuchwepheshe bokukhiqiza be-hemihydrate gypsum ikakhulukazi buhlanganisa inqubo yokuguqula okomile kanye nenqubo yokuguqula okumanzi ikakhulukazi ehlanganisa ukuphelelwa amanzi emzimbeni nokomisa.

(2) Usimende

Lapho ulungiselela i-gypsum yokuzilinganisa, inani elincane likasimende lingangezwa, futhi imisebenzi yalo eyinhloko yilezi:

①Nikeza ngendawo ene-alkali yezingxube ezithile;

② Thuthukisa i-coefficient yokuthambisa yomzimba oqinile we-gypsum;

③ Thuthukisa i-slurry fluidity;

④Lungisa isikhathi sokusetha sohlobo Ⅱ i-gypsum enezinga eliphansi le-gypsum.

Usimende osetshenziswayo ungu-42.5R wasePortland usimende. Lapho ulungiselela i-gypsum yokuzilinganisa enombala, usimende omhlophe wasePortland ungasetshenziswa. Inani likasimende elengeziwe alivunyelwe ukuba lidlule u-15%.

(3) Ukusetha isilawuli sesikhathi

Ku-self-leveling gypsum mortar, uma kusetshenziswa uhlobo lwe-II anhydrous gypsum, kufanele kusetshenziswe i-accelerator yokusetha, futhi uma i-hemihydrate gypsum isetshenziswa, i-setting retarder ngokuvamile kufanele isetshenziswe.

① I-Coagulant: Yakhiwa ngama-sulfate ahlukahlukene kanye nosawoti wawo ophindwe kabili, njenge-calcium sulfate, ammonium sulfate, potassium sulfate, sodium sulfate kanye ne-alum ehlukahlukene, njenge-alum (i-aluminium potassium sulfate), i-red alum (i-potassium dichromate), i-bile alum ( i-copper sulfate), njll.:

②Ukubuyisela emuva:

I-Citric acid noma i-trisodium citrate iyi-retarder ye-gypsum evame ukusetshenziswa. Incibilika kalula emanzini, inomphumela osobala wokuhlehla kanye nenani eliphansi, kodwa futhi izonciphisa amandla omzimba oqinile we-gypsum. Amanye ama-retarders e-gypsum angasetshenziswa ahlanganisa: iglue, i-casein glue, izinsalela zesitashi, i-tannic acid, i-tartaric acid, njll.

(4) I-ejenti yokunciphisa amanzi

I-fluidity ye-gypsum yokuzilinganisa yinkinga ebalulekile. Ukuze uthole i-gypsum slurry ene-fluidity enhle, ukwandisa ukusetshenziswa kwamanzi kukodwa kuzoholela nakanjani ekunciphiseni amandla omzimba oqinile we-gypsum, ngisho nokuphuma kwegazi, okuzokwenza ubuso buthambile, bulahlekelwe impushana, futhi ayikwazi ukusetshenziswa. Ngakho-ke, isinciphisi samanzi se-gypsum kufanele sethulwe ukuze kwandiswe uketshezi lwe-gypsum slurry. Ama-superplasticizers alungele ukulungiswa kwe-gypsum yokuzilinganisa afaka ama-superplasticizers asuselwa ku-naphthalene, ama-polycarboxylate asebenza kahle kakhulu ama-superplasticizers, njll.

(5) I-ejenti yokugcina amanzi

Lapho i-self-leveling gypsum slurry ikwazi ukuzilinganisa, i-fluidity ye-slurry iyancipha ngenxa yokumuncwa kwamanzi kwesisekelo. Ukuze uthole i-gypsum slurry efanelekile yokuzilinganisa, ngaphezu kokumanzi kwayo ukuze uhlangabezane nezidingo, i-slurry kufanele futhi ibe nokugcinwa kwamanzi okuhle. Futhi ngenxa yokuthi ukucoleka kanye namandla adonsela phansi athile egypsum nosimende kusisekelo sempahla kuhluke kakhulu, i-slurry ijwayele ukubola ngesikhathi sokugeleza kanye nenqubo yokuqina emile. Ukuze ugweme lezi zenzakalo ezingenhla, kuyadingeka ukwengeza inani elincane le-ejenti yokugcina amanzi. Ama-ejenti agcina amanzi ngokuvamile asebenzisa izinto ze-cellulose, njenge-methyl cellulose, i-hydroxyethyl cellulose ne-carboxypropyl cellulose.

(6) i-polymer

Thuthukisa ukuhuzuka, ukuqhekeka kanye nokumelana namanzi kwezinto ezizilinganisa usebenzisa ama-polymer ayimpushana ahlakazeka kabusha

(7) I-Defoamer Ukuqeda amabhamuza omoya akhiqizwa ngesikhathi sokuxuba izinto zokwakha, i-tributyl phosphate ngokuvamile isetshenziswa.

(8) isigcwalisi

Isetshenziselwa ukugwema ukuhlukaniswa kwezingxenye zempahla ezizilinganisa ukuze kube noketshezi olungcono. Ama-filler angasetshenziswa, njenge-dolomite, i-calcium carbonate, umlotha we-fly fly, i-slag ecinywe ngamanzi aphansi, isihlabathi esihle, njll.

(9) Ukuhlanganisa okuhle

Inhloso yokwengeza i-aggregate emihle ukunciphisa ukuncipha okomisa komzimba oqinile we-gypsum, ukwandisa amandla angaphezulu nokumelana nokugqoka komzimba oqinile, futhi ngokuvamile usebenzise isihlabathi se-quartz.

Yiziphi izimfuneko zezinto ezibonakalayo ze-gypsum self-leveling mortar?

I-gypsum yohlobo lwe-β-hemihydrate etholwe ngokubala i-dihydrate gypsum yebanga lokuqala ngobumsulwa obungaphezu kuka-90% noma i-α-type hemihydrate gypsum etholwe nge-autoclaving noma nge-hydrothermal synthesis.

I-admixture esebenzayo: izinto zokuzilinganisa zingasebenzisa umlotha wempukane, i-slag powder, njll. njengezixube ezisebenzayo, inhloso ukuthuthukisa ukuhlukaniswa kwezinhlayiyana zezinto futhi kuthuthukise ukusebenza komzimba oqinile. I-Slag powder ithola ukusabela kwe-hydration endaweni ene-alkali, engathuthukisa ukubumbana namandla kamuva esakhiwo sezinto ezibonakalayo.

Izinto zikasimende zamandla okuqala: Ukuze kuqinisekiswe isikhathi sokwakha, izinto zokuzilinganisa zinezidingo ezithile zamandla angaphambi kwesikhathi (ikakhulukazi i-24h flexural namandla acindezelayo). Usimende we-sulphoaluminate usetshenziswa njengento yokuqala yamandla osimende. I-sulphoaluminate Cement inesivinini esisheshayo sokukhipha amanzi kanye namandla aphezulu okuqala, angahlangabezana nezidingo zamandla okuqala wento.

I-activator ye-alkaline: I-gypsum composite cementitious material inamandla aphezulu omile aphelele ngaphansi kwezimo ze-alkaline ezimaphakathi. I-Quicklime kanye nosimende ongu-32.5 kungasetshenziswa ukulungisa ivelu ye-pH ukuze kuhlinzekwe indawo ene-alkali yokufakwa kwe-hydration ye-cementitious material.

I-Coagulant: Isikhathi sokusetha siyinkomba yokusebenza ebalulekile yezinto ezizilinganisa. Isikhathi esifushane kakhulu noma eside kakhulu asihambisani nokwakhiwa. I-coagulant ivuselela umsebenzi we-gypsum, isheshisa isivinini se-crystallization ye-supersaturated ye-dihydrate gypsum, ifinyeza isikhathi sokusetha, futhi igcina ukusetha nesikhathi sokuqina sezinto zokuzilinganisa ngaphakathi kwebanga elifanele.

I-ejenti yokunciphisa amanzi: Ukuze uthuthukise ukubumbana namandla ezinto ezizilinganisa, kuyadingeka ukunciphisa isilinganiso sokuhlanganisa amanzi. Ngaphansi kwesimo sokugcina uketshezi oluhle lwezinto zokuzilinganisa, kuyadingeka ukwengeza ama-agent okunciphisa amanzi. Kusetshenziswa i-naphthalene-based-water reducer, futhi indlela yayo yokunciphisa amanzi iwukuthi iqembu le-sulfonate ku-molecule ye-naphthalene yokunciphisa amanzi kanye ne-molecule yamanzi ihlotshaniswa nezibopho ze-hydrogen, okwenza ifilimu yamanzi ezinzile ebusweni be-gelled. impahla, okwenza kube lula ukukhiqiza amanzi phakathi kwezinhlayiya ezibonakalayo. Ukushelela, ngaleyo ndlela kuncishiswe inani lokuxuba amanzi adingekayo futhi kuthuthukiswe ukwakheka komzimba oqinile wento.

I-ejenti yokugcina amanzi: izinto zokuzilinganisa zakhiwa phansi, futhi ubukhulu bokwakha buncane, futhi amanzi adonswa kalula yisisekelo somhlabathi, okuholela ekungeneni kwe-hydration okwanele, ukuqhekeka phezulu, nokunciphisa. amandla. Kulokhu kuhlolwa, i-methyl cellulose (MC) ikhethiwe njenge-ejenti egcina amanzi. I-MC inokumanzisa okuhle, ukugcinwa kwamanzi kanye nezakhiwo zefilimu, ukuze izinto ezizilinganisa zingophi futhi zigcwaliswe ngokuphelele.

I-latex powder ephinda ihlakazeka (ngemuva kwalokhu ebizwa ngokuthi i-latex powder): i-latex powder ingakhuphula i-elastic modulus yezinto ezizilinganisa, ithuthukise ukumelana nokuqhekeka, amandla ebhondi kanye nokumelana namanzi.

I-Defoamer: I-defoamer ingathuthukisa izici ezibonakalayo zezinto ezizilinganisa, inciphise amabhamuza lapho izinto zakhiwe, futhi ibe nomthelela othile ekuthuthukiseni amandla ento.