Kwiminyaka yakutshanje, ishishini lokwakha libone utshintsho olukhulu olubhekiselele ekusetyenzisweni kwekhonkrithi ekumgangatho ophezulu ukuhlangabezana neemfuno ezibangwayo zeeprojekthi zeziseko ezingundoqo zale mihla.Esinye sezithako eziphambili zekhonkrithi ephezulu yokusebenza yi-binder, edibanisa amaqhekeza adibeneyo ukuze enze i-matrix yekhonkrithi eyomeleleyo kwaye ehlala ixesha elide.Phakathi kweentlobo ezahlukeneyo zokuncamathelisa, ukusetyenziswa kwe-adhesives ye-polymeric kufumene ukuthandwa ngenxa yokukwazi ukubonelela ngeempawu ezinqwenelekayo ezifana nokonyuka kokuqina kunye nokuguquguquka.
Enye yezona zibophelelo zepolymer ezisetyenziswa ngokuqhelekileyo kwikhonkrithi yokusebenza okuphezulu yi-RDP (Redispersible Polymer Powder) i-polymer binder.Izibophelelo ze-polymer ze-RDP zingumgubo oxubeneyo owomileyo onokuxutywa ngokulula kunye nezinye izithako ukwenza imixube yekhonkrithi ngokunyuka kokuguquguquka kunye nokuxhathisa amanzi.Ukongeza izibophelelo ze-polymer ze-RDP kwikhonkrithi luncedo ngakumbi kwizicelo apho ikhonkrithi kulindeleke ukuba ibe phantsi koxinzelelo olubalulekileyo okanye iqhube imijikelo rhoqo yokwandiswa kunye nokucutheka.
Enye yeenzuzo eziphambili ze-RDP polymer adhesives kukuphuculwa kweempawu zabo zokudibanisa.Izibophelelo ze-polymer ze-RDP zineejenti zeekhemikhali ezibanceda ukuba babambelele ngokuqinileyo kwi-aggregate particles kunye namanye amacandelo kumxube wekhonkrithi.Oku kwenza i-matrix yekhonkrithi ibe yomelele kwaye yomelele ngakumbi, ixhathise umonakalo ovela kumandla angaphandle njengemijikelo yokunyibilika komkhenkce, i-abrasion kunye nefuthe.
Olunye uncedo lwe-RDP polymer binders kukukwazi kwabo ukwandisa ukuguquguquka kwemixube yekhonkrithi.Imixube yekhonkrithi yemveli idla ngokuba brittle kwaye ithande ukuqhekeka xa iphantsi koxinzelelo oluphezulu okanye utshintsho lobushushu.Izibophelelo ze-polymer ze-RDP zinokuguqulwa ukuze zenze amanqanaba ahlukeneyo okuguquguquka, ukuvumela umxube wekhonkrithi ukuba umelane kangcono nolu xinzelelo ngaphandle kokuqhekeka.Oku bhetyebhetye kwandisa kwakhona kunciphisa umngcipheko delamination okanye ezinye iindlela zomonakalo ngexesha lokwakha okanye ukusetyenziswa.
Ukongeza ekunikeni ukuqina okukhulu kunye nokuguquguquka, izinto zokuncamathelisa ze-polymer ze-RDP nazo ziyakwazi ukumelana nokufuma.Izakhiwo zekhonkrithi ezivezwe kumanzi okanye ukufuma ixesha elide zingaphuhlisa uluhlu lweengxaki, kubandakanywa ukuqhekeka, ukubola kunye nokubola.I-RDP polymer binders iqulethe i-hydrophobic agents ezinceda ukugxotha umswakama, ukunciphisa umngcipheko wezi ngxaki kunye nokuphucula ukusebenza kwexesha elide lezakhiwo eziphathekayo.
Ukusetyenziswa kwe-RDP polymer adhesives kukwahambelana nokusingqongileyo.Ngokungafaniyo nemixube yekhonkrithi yesiqhelo, edla ngokufuna izixa ezikhulu zesamente yasePortland, umthombo omkhulu wokukhutshwa kwekhabhoni, i-RDP polymer binders inokusebenzisa amanani amancinci ukufikelela kwinqanaba elifanayo lokusebenza.Oku kunciphisa i-carbon footprint yomxube wekhonkrithi kwaye inceda ukunciphisa impembelelo yokusingqongileyo yokwakha.
Ngaphandle kweenzuzo zabo ezininzi, kukho imingeni ehambelana nokusebenzisa izibophelelo ze-polymer ze-RDP kwikhonkrithi.Omnye wemiceli mngeni emikhulu sisidingo sokulawula ngononophelo umthamo kunye nokuxutywa kwezibophelelo zepolymer ukuqinisekisa ukusebenza ngokupheleleyo.I-binder encinci kakhulu iphumela ekunciphiseni ukunamathela kunye nokuqina, ngelixa i-binder eninzi ibangela ukunciphisa amandla kunye nokunciphisa ukusebenza.Ke ngoko, kubalulekile ukusebenzisana nomboneleli onamava wekhonkrithi oziqondayo iipropathi ze-RDP polymer binders kwaye unokunceda ukwandisa ukusetyenziswa kwazo kwizicelo ezithile.
Zininzi iingenelo zokusebenzisa izibophelelo ze-polymer ze-RDP kwikhonkrithi esebenza kakhulu.Iphucula ukuqina kunye nokuguquguquka komxube wekhonkrithi, iphucula ukuchasana kwayo nokufuma, kwaye inefuthe eliphantsi lokusingqongileyo kunemixube yekhonkrithi yendabuko.Ngelixa ukusetyenziswa kwazo kuzisa imingeni ethile, ukudibanisa ngenyameko kunye nokuxuba kunokuvelisa iziphumo ezigqwesileyo kwaye kukhokelela ekudalweni kwezakhiwo eziqinileyo nezihlala ixesha elide.I-RDP polymer adhesives lukhetho oluhle kakhulu kwabo bafuna ukwakha izakhiwo zekhonkrithi ezinokumelana neemeko ezinzima kunye nokubonelela ngokusebenza okuthembekileyo ekuhambeni kwexesha.
Ixesha lokuposa: Oct-16-2023