Isithako se-Gypsum Mortar Admixture?

I-admixture enye inemida ekuphuculeni ukusebenza kwe-gypsum slurry. Ukuba ukusebenza kwe-gypsum mortar kukufumana iziphumo ezanelisayo kunye nokuhlangabezana neemfuno ezahlukeneyo zesicelo, i-admixtures yeekhemikhali, i-admixtures, i-fillers, kunye nezixhobo ezahlukeneyo kufuneka zihlanganiswe kwaye zincediswe ngendlela yesayensi kunye nengqiqo.

1. Umlawuli wokudibanisa

Abalawuli be-coagulation bohlulwe ikakhulu baba ngabacuphi kunye nee-accelerators. Kwi-gypsum exutywe ngodaka, i-retarders isetyenziselwa iimveliso ezilungiselelwe nge-plaster of paris, kwaye i-accelerators iyadingeka kwiimveliso ezilungiselelwe nge-gypsum anhydrous okanye ngokuthe ngqo usebenzisa i-dihydrate gypsum.

2. Umnciphisi

Ukongeza i-retarder kwi-gypsum eyomileyo exutywe izinto zokwakha inqanda inkqubo ye-hydration ye-hemihydrate gypsum kwaye yandisa ixesha lokumisela. Kukho iimeko ezininzi zokuthambisa udaka, kubandakanywa ukubunjwa kwesigaba sodaka, ubushushu bezinto zodaka xa ulungiselela iimveliso, ukucolwa kwamasuntswana, ixesha lokubeka kunye nexabiso le-pH yeemveliso ezilungisiweyo, njl njl. , ngoko kukho umehluko omkhulu kwinani le-retarder kwiimeko ezahlukeneyo. Okwangoku, i-retarder engcono ye-gypsum e-China yi-protein elungisiweyo (iprotheni ephezulu) i-retarder, enenzuzo yeendleko eziphantsi, ixesha elide lokubuyiswa, ukulahlekelwa kwamandla amancinci, ukwakhiwa kwemveliso efanelekileyo, kunye nexesha elide lokuvula. Isixa-mali esisetyenzisiweyo ekulungiseni udaka lwe-stucco kumgangatho osezantsi luqhele ukuba yi-0.06% ukuya kwi-0.15%.

3. I-Coagulant

Ukukhawulezisa ixesha lokuvuselela i-slurry kunye nokwandisa isantya esishukumisayo se-slurry yenye yeendlela zokunyuka kwe-phytic coagulation. I-coagulants yeekhemikhali ezisetyenziswa ngokuqhelekileyo kwizinto zokwakha i-anhydrite powder ziquka i-potassium chloride, i-potassium silicate, i-sulfate kunye nezinye izinto ze-asidi. Idosi ngokubanzi yi-0.2% ukuya kwi-0.4%.

4. Iarhente yokugcina amanzi

Izinto zokwakha ze-gypsum dry-mix azikwazi ukwahlula kwii-agent zokugcina amanzi. Ukuphucula izinga lokugcinwa kwamanzi kwi-slurry yemveliso ye-gypsum kukuqinisekisa ukuba amanzi anokubakho kwi-gypsum slurry ixesha elide, ukuze kufumaneke isiphumo esihle sokuqina kwe-hydration. Ukuphucula ukwakhiwa kwezixhobo zokwakha umgubo we-gypsum, ukunciphisa kunye nokuthintela ulwahlulo kunye nokopha kwe-gypsum slurry, ukuphucula ukuthotywa kwe-slurry, ukwandisa ixesha lokuvula, kunye nokusombulula iingxaki zobunjani bobunjineli ezinjengokuqhekeka kunye nokugrumba zonke azinakwahlulwa kwiiarhente zokugcina amanzi. Ingaba i-ejenti yokugcina amanzi ifanelekile kuxhomekeke kwi-dispersibility yayo, ukunyibilika ngokukhawuleza, ukubunjwa, ukuzinza kwe-thermal kunye nepropathi yokuqina, phakathi kwayo isalathisi esibalulekileyo kukugcinwa kwamanzi.

Kukho iintlobo ezine zeearhente zokugcina amanzi:

①I-Cellulosiciarhente yokugcina amanzi

Okwangoku, eyona isetyenziswa kakhulu kwintengiso yi-hydroxypropyl methylcellulose, ilandelwa yi-methyl cellulose kunye ne-carboxymethyl cellulose. Ukusebenza ngokubanzi kwe-hydroxypropyl methylcellulose kungcono kune-methylcellulose, kwaye ukugcinwa kwamanzi kwezi zibini kuphezulu kakhulu kune-carboxymethylcellulose, kodwa umphumo wokuqina kunye nefuthe le-bonding libi kakhulu kune-carboxymethylcellulose. Kwizinto zokwakha ezixutywe nge-gypsum, inani le-hydroxypropyl kunye ne-methyl cellulose ngokuqhelekileyo li-0.1% ukuya kwi-0.3%, kwaye inani le-carboxymethyl cellulose yi-0.5% ukuya kwi-1.0%. Inani elikhulu lemizekelo yesicelo libonisa ukuba ukusetyenziswa okudibeneyo kwezi zibini kungcono .

②I-arhente yokugcina amanzi esitatshi

I-agent egcina amanzi esitatshi isetyenziswa ikakhulu kwi-gypsum putty kunye ne-surface plaster, kwaye inokutshintsha inxalenye okanye yonke i-arhente yokugcina amanzi eselulosi. Ukongeza i-agent yokugcina amanzi esekelwe kwi-starch kwi-gypsum eyomileyo yomgubo wezinto zokwakha kunokuphucula ukusebenza, ukusebenza, kunye nokuhambelana kwe-slurry. Ngokuqhelekileyo ukusetyenziswa kwe-starch-based based-water-based agents kubandakanya i-tapioca starch, i-pregelatinized starch, i-carboxymethyl starch, kunye ne-carboxypropyl starch. Isixa se-agent yokugcina amanzi esekwe kwistatshi siqhelekile kwi-0.3% ukuya kwi-1%. Ukuba inani likhulu kakhulu, liya kubangela i-mildew yeemveliso ze-gypsum kwindawo enomswakama, eya kuchaphazela ngokuthe ngqo umgangatho weprojekthi.

③I-agent yokugcina amanzi eGlue

Ezinye izinto ezincamathelayo ngoko nangoko zinokudlala indima engcono yokugcina amanzi. Ngokomzekelo, i-17-88, i-24-88 i-polyvinyl alcohol powder, i-Tianqing gum kunye ne-guar gum zisetyenziswa kwi-gypsum eyomileyo exutywe izinto zokwakha ezifana ne-gypsum, gypsum putty, kunye ne-gypsum insulation glue. Inokunciphisa inani le-arhente yokugcina amanzi eselulosi. Ngokukodwa kwi-gypsum yokudibanisa ngokukhawuleza, inokutshintsha ngokupheleleyo i-ether cellulose yokugcina amanzi kwezinye iimeko.

④Izinto zokugcinwa kwamanzi ezingaphiliyo

Ukusetyenziswa kokudibanisa ezinye izinto zokugcina amanzi kwi-gypsum eyomileyo exutywe izixhobo zokwakha kunokunciphisa ubuninzi bezinye izinto zokugcina amanzi, ukunciphisa iindleko zemveliso, kunye nokudlala indima ethile ekuphuculeni ukusebenza kunye nokwakhiwa kwe-gypsum slurry. Izinto ezisetyenziswa ngokuqhelekileyo ezisetyenziselwa ukugcinwa kwamanzi zibandakanya i-bentonite, i-kaolin, umhlaba we-diatomaceous, i-zeolite powder, i-perlite powder, i-attapulgite clay, njl.

5. Ukuncamathelisa

Ukusetyenziswa kwe-adhesives kwi-gypsum dry-mixed building materials is second only to water-retarders and retarders. I-gypsum self-leveling mortar, igypsum edibeneyo, i-caulking gypsum, kunye ne-thermal insulation gypsum glue zonke azinakwahlulwa kwizinto ezincamathelayo.

 I-latex powder enokuchithwa kwakhona

I-redispersible latex powder isetyenziswa ngokubanzi kwi-gypsum self-leveling mortar, i-gypsum insulation compound, i-gypsum caulking putty, njl. Ingakumbi kwi-gypsum self-leveling mortar, inokuphucula i-viscosity kunye ne-fluidity ye-slurry, kwaye idlala indima enkulu ekunciphiseni. i-delamination, ukuphepha ukopha, kunye nokuphucula ukuxhathisa kwi-crack. Idosi ngokubanzi yi-1.2% ukuya kwi-2.5%.

Utywala bepolyvinyl ngoko nangoko

Okwangoku, i-alcohol ye-polyvinyl esheshayo esetyenziswe kwisixa esikhulu kwimarike yi-24-88 kunye ne-17-88. Ihlala isetyenziswa kwiimveliso ezifana ne-gypsum edibeneyo, i-gypsum putty, i-gypsum composite thermal insulation compound, kunye ne-plastering plaster. 0.4% ukuya kwi-1.2%.

I-Guar gum, i-Tianqing gum, i-carboxymethyl cellulose, i-starch ether, njl. zonke zi-adhesives ezinemisebenzi eyahlukeneyo yokudibanisa kwi-gypsum eyomileyo exutywe izinto zokwakha.

6. Thickener

Ukutyeba ikakhulu kukuphucula ukusebenza kunye ne-sagging ye-gypsum slurry, efana ne-adhesives kunye ne-agent yokugcina amanzi, kodwa kungekhona ngokupheleleyo. Ezinye iimveliso ze-thickener zisebenza ngokutyeba, kodwa azifanelekanga ngokuhambelana namandla okubambisana kunye nokugcinwa kwamanzi. Xa uqulunqa izixhobo zokwakha i-gypsum eyomileyo yomgubo, indima ephambili ye-admixtures kufuneka iqwalaselwe ngokupheleleyo ukuze kusetyenziswe i-admixtures engcono nangaphezulu. Iimveliso ze-thickener ezisetyenziswa ngokuqhelekileyo ziquka i-polyacrylamide, i-Tianqing gum, i-guar gum, i-carboxymethyl cellulose, njl.

7. I-arhente yokungenisa umoya

I-arhente yokungenisa umoya, eyaziwa ngokuba yi-arhente yogwebu, isetyenziswa ikakhulu kwi-gypsum exutywe nezixhobo zokwakha ezifana ne-gypsum insulation compound kunye ne-plaster plaster. I-arhente yokungenisa umoya (i-agent egwebu) inceda ekuphuculeni ukwakhiwa, ukumelana nokuqhekeka, ukuxhathisa kweqabaka, ukunciphisa ukopha kunye nokwahlula, kunye ne-dosage ngokubanzi yi-0.01% ukuya kwi-0.02%.

8. Defoamer

I-Defoamer isoloko isetyenziswa kwi-gypsum self-leveling mortar kunye ne-gypsum caulking putty, enokuphucula ukuxinana, amandla, ukuxhathisa kwamanzi kunye nokubambisana kwe-slurry, kwaye idosi ngokubanzi yi-0.02% ukuya kwi-0.04%.

9. Isinciphisi samanzi

I-arhente yokunciphisa amanzi inokuphucula ubumanzi be-gypsum slurry kunye namandla e-gypsum eqinile yomzimba, kwaye idla ngokusetyenziswa kwi-gypsum self-leveling mortar kunye ne-plaster plaster. Okwangoku, izinciphisi zamanzi eziveliswa ekhaya zibekwe ngokwendlela yokuguquguquka kwazo kunye neziphumo zokomelela: izinciphisi zamanzi ezine-polycarboxylate eziphelelwe lixesha, izinciphisi zamanzi ze-melamine ezisebenza kakuhle kakhulu, iti esekwe kwi-high-effective high-retaded retaded reducers, kunye nezinciphisi zamanzi ze-lignosulfonate. Xa usebenzisa i-agent yokunciphisa amanzi kwi-gypsum dry-mix building materials, ngaphezu kokuqwalasela ukusetyenziswa kwamanzi kunye namandla, ingqalelo kufuneka ihlawulwe kwakhona kwixesha lokumisela kunye nokulahlekelwa kwe-fluidity yezinto zokwakha ze-gypsum ngokuhamba kwexesha.

10. I-arhente yokuthintela amanzi

Esona siphene sikhulu seemveliso zegypsum kukunganyangeki kakuhle kwamanzi. Iindawo ezinomswakama ophezulu womoya zineemfuno eziphezulu zokunganyangeki kwamanzi kwi-gypsum exutywe nodaka oluxubileyo. Ngokuqhelekileyo, ukuxhathisa kwamanzi kwi-gypsum eqinile kuyaphuculwa ngokudibanisa i-hydraulic admixtures. Kwimeko yamanzi amanzi okanye agcweleyo, ukongezwa kwangaphandle kwe-admixtures ye-hydraulic kungenza ukuba i-coefficient ethambileyo ye-gypsum ilukhuni ifikelele ngaphezu kwe-0.7, ukwenzela ukuba ihlangabezane neemfuno zamandla emveliso. Imixube yeekhemikhali ingasetyenziselwa ukunciphisa ukunyibilika kwegypsum (oko kukuthi, ukonyusa i-coefficient yokuthambisa), ukunciphisa i-adsorption ye-gypsum emanzini (oko kukuthi, ukunciphisa izinga lokufunxa kwamanzi) kunye nokunciphisa ukukhukuliseka kwe-gypsum lukhuni umzimba (oko kukuthi , ukuhlukaniswa kwamanzi). I-Gypsum ye-waterproofing agents iquka i-ammonium borate, i-sodium methyl siliconate, i-silicone resin, i-emulsified wax yeparafini, kunye ne-silicone emulsion i-agent yokukhusela amanzi enempembelelo engcono.

11. Isivuseleli esisebenzayo

Ukusebenza kwemvelo kunye neekhemikhali ze-anhydrites zinika ukubambelela kunye namandla okuvelisa i-gypsum dry-mix building materials. I-activator ye-asidi inokukhawulezisa isantya sokuhamba kwamanzi kwi-gypsum ye-anhydrous, inciphise ixesha lokumisela, kwaye iphucule amandla okuqala e-gypsum eqinile yomzimba. I-activator ye-alkaline inefuthe elincinane kwisantya sokuqala sokugalela amanzi kwi-gypsum ene-anhydrous, kodwa inokuphucula kakhulu amandla omva womzimba oqinileyo we-gypsum, kwaye inokuba yinxalenye ye-hydraulic gelling material kumzimba oqinileyo wegypsum, iphucula ngempumelelo ukuxhathisa kwamanzi. isini somzimba wegypsum oqinileyo. Isiphumo sokusetyenziswa kwe-acid-base compound activator ingcono kuneyodwa ye-acidic okanye i-activator esisiseko. I-Acid stimulants ibandakanya i-potassium alum, i-sodium sulfate, i-potassium sulfate, njl.

12. Thixotropic lubricant

I-lubricants Thixotropic isetyenziselwa i-gypsum yokuzimela okanye i-gypsum, enokunciphisa ukunyanzeliswa kokuhamba kwe-gypsum mortar, ukwandisa ixesha elivulekileyo, ukuthintela ukucwangciswa kunye nokuhlaliswa kwe-slurry, ukwenzela ukuba i-slurry ikwazi ukufumana i-lubricity efanelekileyo kunye nokusebenza. Ngelo xesha, isakhiwo somzimba siyafana, kwaye amandla ayo angaphezulu ayanda.