Iipolymer powders eziphinda zikwazi ukuphinda zisetyenziswe (RDPs) ziye zatsala ingqalelo ebanzi kwindawo yezixhobo zokwakha ngenxa yobuchule bazo bokuphucula iipropathi ezahlukeneyo zodaka kunye neemveliso ezisekwe kwisamente. Enye yeenzuzo eziphambili zeRDP kukukwazi ukunyusa ukuxhathisa kwi-sag, inkalo ebalulekileyo kwizicelo zokwakha.
I-Redispersible polymer powders (RDP) iye yaba izongezo eziguquguqukayo kwizinto zokwakha, inika uluhlu olubanzi lweenzuzo ezibandakanya ukunamathela okuphuculweyo, ukuguquguquka, ukuxhathisa kwamanzi kunye nokuxhatshazwa kwe-sag. Ukumelana ne-Sag kubhekiselele ekukwazini kwesixhobo ukugcina imilo yayo kunye nokuthintela ukuhamba okanye ukuguqulwa xa isetyenziswe ngokuthe nkqo okanye ngaphezulu. Kwizicelo zokwakha ezifana ne-adhesives tile, i-plaster kunye ne-stuccoes, ukuxhatshazwa kwe-sag kubalulekile ukuqinisekisa ukufakwa okufanelekileyo kunye nokusebenza kwexesha elide.
Iipropati zePolymer Powder eDispersible Redispersible (RDP)
I-RDP ngokuqhelekileyo yenziwa ngenkqubo yokumisa isitshizi apho i-polymer dispersion iguqulwa ibe ngumgubo okhululekileyo. Iimpawu ze-RDP, kubandakanywa ubungakanani be-particle, i-glass transition yeqondo lokushisa, uhlobo lwe-polymer, kunye nokwakheka kweekhemikhali, idlala indima ebalulekileyo ekunqumeni ukusebenza kwayo kwizicelo zokwakha. Ukuhanjiswa kobungakanani be-RDP kuchaphazela ukusasazeka kwayo, ukwenza ifilimu kunye neempawu zoomatshini, ezithi zichaphazele ukuxhathisa kwe-sag.
1.Indlela ye-RDP yokuphucula iipropati zokuchasana ne-sag
Kukho iindlela ezininzi ezinegalelo ekwandeni koxhathiso lweRDP ekwandeni:
a. Ukuzaliswa kweNcwadana: Iinqununu ezintle ze-RDP zinokuzalisa i-voids kunye nokwandisa ubuninzi bokuzaliswa kodaka okanye i-adhesive, ngaloo ndlela ikwandisa ukuchasana kwayo kwi-sag.
b. Ukuqulunqwa kwefilimu: I-RDP yenza ifilimu eqhubekayo xa ifakwe emanzini, iqinisa i-matrix yodaka kunye nokubonelela ngokubambisana, ngaloo ndlela inciphisa ukuthambekela kokudilika.
C. Ukuguquguquka: Iimpawu ze-elastic ze-RDP zinegalelo ekuguquguqukeni komdaka, okuvumela ukuba umelane noxinzelelo kunye nokuguqulwa ngaphandle kokugubha.
d. Ugcino lwamanzi: I-RDP inokuphucula amandla okugcina amanzi kudaka, iqinisekise ukusebenza kwexesha elide kwaye inciphise umngcipheko wokudodobala ngexesha lolwakhiwo.
2. Izinto ezichaphazela ukuxhathisa kwe-sag
Kukho izinto ezininzi ezichaphazela ukuxhathisa kwe-sag yezinto zesamente, kuquka:
a. Ukubunjwa: Uhlobo kunye nesixa se-RDP, kunye nezinye izongezo ezifana ne-thickeners kunye ne-dispersants, zinokuchaphazela kakhulu ukuxhathisa kwe-sag.
b. Ukuhambelana: Ukuhambelana kodaka okanye ukunamathela kunqunywe yimiba efana nomlinganiselo wamanzi kwi-adhesive kunye nenkqubo yokuxuba, kwaye idlala indima ebalulekileyo ekuchaseni i-sag.
C. Iipropati ze-Substrate: Iimpawu ze-substrate, ezifana ne-porosity kunye ne-roughness, zichaphazela ukunamathela kunye nokuxhatshazwa kwe-sag yezinto ezisetyenzisiweyo.
d. Iimeko zokusingqongileyo: Ubushushu, ukufuma, kunye nokuhamba komoya kunokuchaphazela ukomisa kunye nenkqubo yokunyanga, ngaloo ndlela kuchaphazela ukuxhathisa kwe-sag.
3. Uvavanyo lokunganyangeki kwe-sag
Iindlela ezahlukeneyo zingasetyenziselwa ukuvavanya ukuxhathisa kwe-sag yezinto zokwakha, kubandakanya:
a. Iimvavanyo zokuqukuqela: Iimvavanyo eziqukuqelayo, ezifana neemvavanyo ze-slump kunye ne-flow bench test, ngokuqhelekileyo zisetyenziselwa ukuvavanya ukuziphatha kokuhamba kunye nokuhambelana kwee-mortars kunye ne-adhesives.
b. Uvavanyo lwe-sag: Uvavanyo lwe-sag lubandakanya ukusebenzisa isampuli ngokuthe nkqo okanye ngaphezulu kunye nokulinganisa iqondo le-sag ekuhambeni kwexesha. Iindlela ezinjengovavanyo lwekhowuni kunye novavanyo lweblade zisetyenziselwa ukulinganisa ukuxhathisa kwe-sag.
C. Imilinganiselo yeRheological: I-Rheological parameters, kubandakanywa i-viscosity, uxinzelelo lwesivuno kunye ne-thixotropy, inika ingqiqo ekuhambeni kunye nokuziphatha kokuguqulwa kwezinto zokwakha.
d. Ukusebenza okusebenzayo: Ekugqibeleni, ukuxhathisa kwemathiriyeli kwi-sag kuyavavanywa ngokusekwe ekusebenzeni kwayo kusetyenziso lwehlabathi lokwenyani, olufana nofakelo lweethayile kunye nonikezelo lwefacade.
4. Ukusetyenziswa kweRDP ekwandiseni uxhathiso
I-RDP isetyenziswa ngokubanzi kwizinto zokwakha ukomeleza ukuxhathisa kwe-sag:
a. I-Tile Adhesives: I-RDP iphucula ukubambelela kunye nokuxhatshazwa kwe-sag ye-adhesives tile, iqinisekisa ukudibanisa okufanelekileyo kunye nokunciphisa i-tile slippage ngexesha lofakelo.
b. Unikezelo kunye neStucco: Kutyatyekwa lwangaphandle kunye ne-stucco, i-RDP yonyusa ukuxhathisa kwe-sag kwaye ivumela ukugudiswa, nkqu ukusetyenziswa kwimigangatho ethe nkqo ngaphandle kokuwohloka okanye ukuguquka.
C. Iikhompawundi zokuzilinganisa: I-RDP inokudityaniswa kwiikhompawundi zokuzilinganisa ukuze kuphuculwe ukuhamba kunye nokuxhatshazwa kwe-sag, okubangelwa indawo ephantsi kunye nenqanaba eliphezulu.
d. I-membrane engangenwa manzi: I-RDP yongeza ukuxhathisa kwe-sag ye-membrane engangeni manzi, iqinisekisa ukugquma kunye nokubonelela ngokhuseleko oluthembekileyo lokungena manzi.
5. Imizekelo nemizekelo
Imizekelo emininzi yophononongo kunye nemizekelo ibonisa impumelelo yeRDP ekuphuculeni ukunganyangeki:
a. I-Case Study 1: Ukusetyenziswa kwe-RDP kwi-adhesive tile kwiiprojekthi ezinkulu zorhwebo, ebonisa ukomelezwa kwe-sag kunye nokuqina kwexesha elide.
b. I-Case Study 2: Uvandlakanyo lonikezelo olulungisiweyo lwe-RDP kwiifacade ezibonisa ukomelela okugqwesileyo kokuthotywa kunye nokumelana nemozulu.
C. Umzekelo 1: Uthelekiso lokunganyangeki kodaka kunye nolungenazo izongezo zeRDP, kuqaqambisa uphuculo olubonakalayo oluphunyeziweyo ngeRDP.
d. Umzekelo 2: Ulingo lwangaphandle lwe-RDP ehlengahlengisiweyo yokuzilinganisa ikhompawundi, ebonisa ukusebenziseka ngokulula kunye nokumelana okugqwesileyo phantsi kweemeko zehlabathi lokwenyani.
I-Redispersible polymer powders (RDP) idlala indima ebalulekileyo ekwandiseni ukuxhathisa kwe-sag yezinto zokwakha, ukubonelela ngendibaniselwano yokomelezwa koomatshini, ukubunjwa kwefilimu kunye nokugcinwa kwamanzi. Ngokuqonda iindlela kunye nezinto eziphembelela ukuxhathisa kwe-sag kunye nokusebenzisa iindlela ezifanelekileyo zovavanyo, iinjineli kunye neekontraka zinokusebenzisa ngokukuko i-RDP ukufumana izisombululo zolwakhiwo oluzinzileyo kunye nokusebenza okuphezulu. Ngophando oluqhubekayo kunye nokuveliswa kwezinto ezintsha, i-RDP kulindeleke ukuba iqhubele phambili isongezo esiphambili ekusombululeni imingeni enxulumene nokudodobala kunye nokuqhubela phambili intsimi yemathiriyeli yokwakha.
Ixesha lokuposa: Feb-28-2024