Ukusetyenziswa kwe-HPMC kudaka lwesamente

Intshayelelo

IHydroxypropyl Methylcellulose (HPMC) yi-ether ye-cellulose engeyiyo ionic ephuma kwi-cellulose yendalo. Iye yaba sisongezo esiyimfuneko kushishino lolwakhiwo, ngakumbi ekwenziweni kodaka lwesamente. I-HPMC iphucula iipropati zodaka, igalelo ekuphuculweni kokusebenza, ukugcinwa kwamanzi, ukunamathela, kunye namandla omatshini.

Ukuqulunqwa kunye neePropati zeHPMC

I-HPMC yenziwe nge-etherification ye-cellulose kunye ne-methyl chloride kunye ne-propylene oxide. I-polymer ebangelwayo ibonakaliswe kukunyibilika kwamanzi aphezulu, iipropati zokuguqula i-viscosity, kunye nobuchule bokwenza ifilimu. Ezi mpawu zenza i-HPMC ibe yinto efanelekileyo yokudibanisa yokuguqula iimpawu ze-rheological zezinto ezisekelwe kwisamente.

Izibonelelo ze-HPMC kudaka lwesamente

1. Ukuphuculwa kokuSebenza

Olunye lolona ncedo luphambili lwe-HPMC kudaka lwesamente kukukwazi kwayo ukuphucula ukusebenza. I-HPMC isebenza njenge-lubricant phakathi kwamasuntswana e-samente, ukunciphisa ukukhuhlana kunye nokuvumela ukusetyenziswa kakuhle. Oku kuphucuka kokusebenza kwenza kube lula ukusasazwa kunye nomgangatho wodaka, okuyimfuneko ekufezekiseni ukugqiba okufanayo.

2. Ukugcinwa kwaManzi okongeziweyo

I-HPMC iphucula ngokubonakalayo amandla okugcina amanzi odaka lwesamente. Ukugcinwa kwamanzi kubalulekile ngexesha lenkqubo yokunyanga njengoko kuqinisekisa ukuhanjiswa okwaneleyo kwamaqhekeza e-samente, okukhokelela kuphuhliso lwamandla olungcono. Ngokugcina amanzi, i-HPMC ikhusela ukoma kwangaphambi kwexesha kwaye inciphisa umngcipheko wokuqhekeka kunye nokushwabana kodaka.

3. Ukwandiswa kokunamathela

Ukubambelela kubaluleke kakhulu ekomeleleni nasekusebenzeni kodaka lwesamente. I-HPMC iphucula iipropati zokuncamathelisa zodaka ngokuphucula amandla ayo okudibanisa kwii-substrates ezahlukeneyo, ezifana nezitena, amatye, kunye nemiphezulu yekhonkrithi. Oku kubambelela okwandisiweyo kuqinisekisa ukuba udaka luhlala luqinile phantsi koxinzelelo kunye neemeko zokusingqongileyo.

4. Amandla oomatshini

Ukufakwa kwe-HPMC kudaka lwesamente kunegalelo kumandla ayo omatshini. Ngokulungisa inkqubo yokufakwa kwamanzi kunye nokuphucula i-microstructure yodaka, i-HPMC inceda ukufezekisa amandla aphezulu oxinzelelo kunye nokuguquguquka. Esi songezo sibalulekile kwizicelo zesakhiwo apho umthamo wokuthwala umthwalo uxhalabile.

IiNdlela zokuSebenza kwe-HPMC kudaka lwesamente

1. Ukuguqulwa kweViscosity

I-HPMC ilungisa i-viscosity yomxube wodaka, iyenze idibanise ngakumbi kwaye kulula ukuyiphatha. Amatyathanga e-polymer e-HPMC asebenzisana neamolekyu zamanzi, enza i-gel-efana nesakhiwo esonyusa i-viscosity yesigaba samanzi. Le mpembelelo ye-gelation inceda ekugcineni i-homogeneity yodaka kunye nokuthintela ukuhlukana kwamacandelo.

2. Ukugcinwa kwamanzi

Ubume be-hydrophilic be-HPMC buvumela ukuba ifunxe kwaye igcine izixa ezibalulekileyo zamanzi. Xa idityaniswe kudaka lwesamente, i-HPMC yenza umqobo onciphisa izinga lokumka kwamanzi. Ubukho bexesha elide bamanzi buqinisekisa ukuqhutyelwa kwe-hydration ye-cement particles, eyimfuneko ekuphuhliseni amandla kunye nokuqina kwi-mortar.

3. Ukwenziwa kweFilimu

Emva kokumisa, i-HPMC yenza ifilimu eqhubekayo, eguquguqukayo ngaphakathi kwe-matrix yodaka. Le filimu iphakamisa ukudibanisa phakathi kwe-sement paste kunye ne-aggregates, ukuphucula ingqibelelo yonke yodaka. Lo mboniso bhanyabhanya ukwanegalelo ekuxhathiseni kodaka ekungeneni kwamanzi kunye nemozulu.

Iingqwalasela eziSebenzayo ekuSetyenzisweni kwe-HPMC

1. Umthamo

Olona mthamo ulungileyo we-HPMC kudaka lwesamente uyahluka ngokuxhomekeke kwisicelo esithile kunye neempawu ezifunwayo. Ngokuqhelekileyo, i-dosage isuka kwi-0.1% ukuya kwi-0.5% ngobunzima besamente. Iidosi eziphezulu zinokufuneka kwizicelo ezikhethekileyo, ezinje ngodaka lokuzilinganisa okanye izinto zokuncamathelisa iithayile.

2. IiNkqubo zokuxuba

Iinkqubo zokuxuba ezifanelekileyo ziyimfuneko ukuze kuqinisekiswe ukuhanjiswa okufanayo kwe-HPMC kumdaka. Ukuxutywa okomileyo kwe-HPMC kunye nezinye izithako ezinomgubo phambi kokuba wongeze amanzi kuyacetyiswa. Oku kuqinisekisa ukuba i-polymer isasazwe ngokulinganayo kwaye isebenze xa idibene namanzi.

3. Ukuhambelana nezinye izongezo

I-HPMC iyahambelana noluhlu olubanzi lwezinye izongezo ezisetyenziswa kwiidaka zesamente, ezifana ne-superplasticizers, i-accelerators, kunye ne-retarders. Nangona kunjalo, kubalulekile ukuqhuba iimvavanyo zokuhambelana ukuqinisekisa ukuba imiphumo edibeneyo yezongezo ezininzi azichaphazeli kakubi ukusebenza kodaka.

Ukusetyenziswa kwe-HPMC kwiindidi ezahlukeneyo ze-Cement Mortars

1. Izincamathelisi zeThayile

Kwizinto zokuncamathelisa iithayile, i-HPMC iphucula ixesha elivulekileyo, ukuchasa ukutyibilika, kunye nokomelela kokuncamathela. Ukugcinwa kwamanzi okongeziweyo kuqinisekisa ukuba i-adhesive ihlala isebenza ixesha elide, ivumela ukubekwa kwethayile ngokuchanekileyo.

2. Unikezelo kunye nePlaster Mortars

Unikezelo kunye nodaka lodaka, i-HPMC ibonelela ngokusebenza okugqwesileyo kwaye inciphisa umngcipheko wokwehla. Ukubambelela okuphuculweyo kunye nokugcinwa kwamanzi kunegalelo ekugqityweni okugudileyo, okuhlala ixesha elide.

I-3 yokuSelf-leveling Mortars

Iifama zokuziphakamisa zixhamla kwiipropati zokuguqula i-viscosity ze-HPMC, eziqinisekisa umgangatho ofanayo, umgangatho. I-polymer inceda ukugcina i-fluidity yodaka ngelixa ikhusela ulwahlulo kunye nokopha.

4. Lungisa iiMeko

Kwiindonga zokulungisa, i-HPMC iphucula ukubambelela kwii-substrates ezikhoyo kwaye iphucula iimpawu zomatshini kwiindawo ezilungisiweyo. Umthamo wokugcina amanzi we-HPMC uqinisekisa ukunyangwa okufanelekileyo kunye nokuqina kwexesha elide.

I-HPMC sisongezo esisebenza ngeendlela ezininzi esiphucula kakhulu ukusebenza kodaka lwesamente. Izibonelelo zayo, kubandakanywa nokusebenza okuphuculweyo, ukugcinwa kwamanzi, ukubambelela, kunye namandla omatshini, kwenza kube yinto ebalulekileyo kwizicelo ezahlukeneyo zokwakha. Ukuqonda iindlela zokusebenza ze-HPMC kunye nokuthathela ingqalelo imiba esebenzayo efana nedosi kunye nokuhambelana kubalulekile ekuphuculeni ukusetyenziswa kwayo kwiidaka zesamente. Njengoko ishishini lokwakha liqhubeka nokuvela, ukusetyenziswa kwe-HPMC kusenokwenzeka ukuba kwande, kuqhubele phambili ukuqhubela phambili kumgangatho kunye nokuqina kwemathiriyeli esekwe kwisamente.