i-hydroxypropyl methylcellulose (HPMC) kwiplasta esekwe kwi-gypsum elula

Iplasta esekwe kwi-gypsum elula sisixhobo sokwakha esinobuhlobo nokusingqongileyo esisetyenziswa kakhulu ekulinganiseni udonga lwangaphakathi, kwiinkqubo zokuthintela ubushushu kunye nonyango lwesiseko sokuhombisa. Yenziwe nge-gypsum yokwakha njengesixhobo esiphambili sokufaka isamente, esongezwa zii-aggregates ezilula (ezifana ne-perlite, ii-microspheres ze-vitrified, iibhola ze-foam, njl.njl.). Ngenxa yeempawu ze-gypsum ngokwayo, ezinje ngokujiya okukhawulezayo kunye nesantya sokuqina, isantya esikhulu sokuncipha, kunye nokucolwa okulula, ukuze kuphuculwe ukusebenza kwayo kokwakhiwa kunye nomgangatho wokusetyenziswa, kudla ngokuba yimfuneko ukongeza iintlobo ngeentlobo zezongezo ukuphucula ukusebenza kwayo. Phakathi kwazo,i-hydroxypropyl methylcellulose (HPMC), njenge-cellulose ether ebalulekileyo esebenzayo, idlala indima engenakutshintshwa kwiplasta ekhaphukhaphu esekelwe kwi-gypsum.

1. Iimpawu ezisisiseko ze-HPMC

I-HPMC yipolymer enyibilikayo emanzini engeyiyo i-ionic eyenziwe ngokuguqulwa kwe-etherification ye-cellulose yendalo enemolekyuli ephezulu. Ineempawu zokugcina amanzi kakuhle, ukutyeba, ukuthambisa, ukwenza ifilimu kunye nokuxhoma. Idla ngokufakwa ngendlela yomgubo kwiplasta, kwi-mortar nakwezinye izinto zokwakha ezixutywe nomileyo, kwaye iyadumba kwaye inyibilike ngokukhawuleza xa idibana namanzi ukuze idlale indima.

2. Indima ephambili ye-HPMC kwiplasta ekhaphukhaphu esekelwe kwi-gypsum

2.1. Ukuphucula ukugcinwa kwamanzi kunye nokwandisa ixesha lokusebenza

I-Gypsum inexesha elifutshane lokuseta ekuqaleni kunye nokufunxwa kwamanzi ngamandla, kwaye isengozini yokulahlekelwa ngamanzi ngokukhawuleza ngexesha lokwakhiwa, okukhokelela kwiingxaki ezifana nokuqhekeka kunye nomgubo. I-HPMC inokugcinwa kwamanzi okuhle kwaye inokwenza ifilimu yamanzi efanayo kwi-slurry, inciphise ukungena kwamanzi asimahla kwi-substrate, kwaye ilibazise ukufuma kwamanzi, ngaloo ndlela:

Qinisekisa ukuba i-gypsum ifumana umswakama opheleleyo kwaye uphucule amandla ezinto ezisetyenzisiweyo;

Nciphisa ukuqhekeka kweenwele kwaye uphucule umgangatho obonakalayo;

Yandisa ixesha lokusebenza kolwakhiwo, phucula ukusebenza kakuhle kunye nokulungelelaniswa kolwakhiwo, ingakumbi kwiindawo ezinobushushu obuphezulu kunye neendawo ezomileyo.

2.2. Ukuphucula ulwakhiwo kunye nokusebenza lula

I-HPMC inokuphucula kakhulu ukuhambelana kunye noxinano lweplasta yegypsum, yenze ukutyibilika kwayo kube lula kwaye kube manzi ngakumbi. Ibonakala ngokukodwa kwi:

Kulula ukuyixuba nokuyifaka, kulula ukuyifaka;

Nciphisa ukutyibilika kwezinto kunye nomgubo;

Qinisekisa ukuba iplasta eludongeni iyafana kwaye uphucule ukuba umphezulu wayo uthambe.

2.3. Ukuphucula ukunamathela kunye neempawu zokulwa nokuwa

I-HPMC inokwenza ifilimu efanelekileyo yokufunxa phakathi kodaka kunye ne-substrate, iphucule ukunamathelana phakathi kweplasta kunye nomphezulu wodonga, ngaloo ndlela iphumelele:

Nciphisa iingxaki zokuwa nokugoba kwemingxuma;

Ukuphucula amandla okulwa nokugoba xa kusenziwa umphezulu othe nkqo, okwenza ukuba izinto zingatyibiliki lula, nto leyo elungele ukwakhiwa komaleko otyebileyo;

Nceda wenze umaleko wokugqiba ogudileyo noxineneyo.

2.4. Lungisa ukuhambelana kunye nesiphumo sokutyeba

I-HPMC inamandla okulawula i-viscosity yesisombululo. Emva kokunyibilika emanzini, yenza inkqubo ye-viscoelastic colloid, ezinzisa yonke i-slurry ye-gypsum, ithintele ngempumelelo ukuqhekeka kunye nokwahlulwahlulwa, kwaye iphucula uzinzo lomthamo wezinto. Kwangaxeshanye, ngokwenqanaba le-viscosity kunye nobungakanani bokongeza beentlobo ezahlukeneyo ze-HPMC, abasebenzisi banokulungisa ngokulula ukuhambelana kwe-plaster ukuze ivumelane neendlela ezahlukeneyo zokwakha (ezifana nokuplasta ngesandla kunye nokutshiza ngoomatshini).

2.5. Phucula ukumelana neentanda emva kokwakha

Iplasta esekwe kwi-gypsum elula idla ngokuqhekeka ngenxa yokukhanya kwayo kunye nesantya sayo sokuncipha okukhulu. I-HPMC inokunciphisa uxinzelelo kunye nokuqhekeka ngokuphucula ukugcinwa kwamanzi, ukuseta kancinci kunye nokuguquguquka. Ukongeza, i-HPMC inokuphucula ukumelana nokuguqulwa kweplasta, okwenza ifaneleke ngakumbi kwiindawo ezahlukeneyo zesiseko.

3. Amanyathelo okhuseleko okusebenzisa i-HPMC

Indlela yokongeza: I-HPMC idla ngokuxutywa neminye imigubo njengomxube owomileyo kwangaphambili. Akukhuthazwa ukuba uyifake ngqo emanzini uze uyixube ukuze uphephe ukuhlangana.

Ulawulo lomlinganiselo: Ukongeza kakhulu kunokukhokelela kwixesha lokujiya kakhulu, amandla anciphe, kunye nokunamathela okunciphileyo. Isixa sokongeza esicetyiswayo ngokubanzi yi-0.1% ~ 0.5%.

Ukukhetha imodeli: I-HPMC ene-viscosities ezahlukeneyo kunye nee-degrees zokutshintsha kufuneka ikhethwe ngokwendlela yoyilo lwemveliso ukuze kuthathelwe ingqalelo ukusebenza kolwakhiwo kunye nokusebenza kwemveliso egqityiweyo.

4. Ukubaluleka kwe-HPMC ekukhuthazeni izixhobo zokwakha eziluhlaza

Phantsi kwendlela ekhoyo yokukhuthaza ukonga amandla kunye nokwakha okungenabungozi kokusingqongileyo, iplasta esekwe kwi-gypsum ekhaphukhaphu isetyenziswa kakhulu kwizakhiwo eziluhlaza ngenxa yeenzuzo zayo zezixhobo ezivuselelekayo, ukukhutshwa kwekhabhoni ephantsi, kunye nentuthuzelo entle. I-HPMC, njengesongezelelo esibalulekileyo esisebenza kakuhle kwifomyula yeplasta ye-gypsum, ayiphuculi nje kuphela ukusebenza kwayo, kodwa ikwaphucula ukusebenza kwayo kakuhle kokwakha kunye nesantya sokusetyenziswa kwezinto, inciphisa inkunkuma yezixhobo ebangelwa kukulungiswa kwakhona, kwaye isisiseko sokukhuthaza uphuhliso oluzinzileyo lwezixhobo zokwakha eziluhlaza.

I-Hydroxypropyl methylcellulose (HPMC) idlala indima ezininzi kwiplasta esekwe kwi-gypsum elula, kuquka ukugcinwa kwamanzi, ukuqina, ukuthambisa, ukuthintela ukugoba kunye nokuqinisa ukubopha, okuphucula kakhulu ukusebenza kakuhle, iimpawu zoomatshini kunye nobomi benkonzo yeplasta yegypsum. Njengoko imfuno ekhulayo yezixhobo ezilula, ezonga amandla kunye nezinobuhlobo nokusingqongileyo kushishino lokwakha, ukubaluleka kwe-HPMC kwiinkqubo ezisekwe kwi-gypsum kuya kuba yinto ephawulekayo, kwaye ixabiso layo lobugcisa kunye nendawo yokusetyenziswa kwimarike kuya kuqhubeka nokwanda. Ukukhethwa ngokuchanekileyo kunye nokusetyenziswa kwe-HPMC kuya kubonelela ngesiseko esiqinileyo sokuphucula ukusebenza kweenkqubo zeplasta yegypsum kunye nokuqinisekisa umgangatho weeprojekthi zokwakha.