Eminyakeni yamuva nje, imboni yokwakha ibone ushintsho olukhulu ekusetshenzisweni kwekhonkrithi esebenza kahle ukuze kuhlangatshezwane nezidingo ezidingekayo zamaphrojekthi engqalasizinda yesimanje. Esinye sezithako ezibalulekile zekhonkrithi esebenza kahle kakhulu yi-binder, ehlanganisa izinhlayiya ezihlanganisiwe ndawonye ukuze yakhe i-matrix yekhonkrithi eqinile nehlala isikhathi eside. Phakathi kwezinhlobo ezahlukene ze-glue, ukusetshenziswa kwe-polymeric adhesive kuye kwathandwa ngenxa yekhono layo lokunikeza izakhiwo ezifiselekayo njengokuqina okukhulu kanye nokuguquguquka.
Esinye sezihlanganisi ze-polymer ezisetshenziswa kakhulu kukhonkolo esebenza kahle kakhulu yi-RDP (Redispersible Polymer Powder) polymer binder. Izihlanganisi ze-RDP polymer ziyimpuphu yengxube eyomile engaxutshwa kalula nezinye izithako ukuze kwakhiwe izingxube zekhonkolo ezinokuguquguquka okukhulu kanye nokumelana namanzi. Ukwengeza izihlanganisi ze-RDP polymer kukhonkolo kuwusizo kakhulu ekusetshenzisweni lapho kulindeleke ukuthi ikhonkolo ibe ngaphansi kokucindezeleka okukhulu noma ibhekane nemijikelezo evamile yokwanda nokufinyela.
Enye yezinzuzo eziyinhloko zezinamathiseli ze-RDP polymer yizakhiwo zazo zokubopha ezithuthukisiwe. Izihlanganisi ze-RDP polymer ziqukethe izinto zamakhemikhali ezisiza ukuthi zinamathele ngokuqinile ezinhlayiyeni ezihlanganisiwe nezinye izingxenye ezixutshweni zekhonkrithi. Lokhu kwenza i-matrix yekhonkrithi ibe namandla futhi iqine kakhudlwana, imelane nomonakalo ovela emandleni angaphandle njengemijikelezo yokuqandisa nokuncibilika, ukuguguleka kanye nokuthinteka.
Enye inzuzo yezihlanganisi ze-RDP polymer yikhono lazo lokukhulisa ukuguquguquka kwezingxube zekhonkrithi. Izingxube zekhonkrithi zendabuko zivame ukuqhekeka futhi zithambekele ekuqhekekeni lapho zicindezeleke kakhulu noma zishintsha izinga lokushisa. Izihlanganisi ze-RDP polymer zingashintshwa ukuze kudalwe amazinga ahlukahlukene okuguquguquka, okuvumela ingxube yekhonkrithi ukuthi imelane kangcono nalezi zingcindezi ngaphandle kokuqhekeka. Lokhu kuguquguquka okwandisiwe kunciphisa nengozi yokwehlukaniswa noma ezinye izinhlobo zomonakalo ngesikhathi sokwakhiwa noma ukusetshenziswa.
Ngaphezu kokunikeza ukuqina okukhulu nokuguquguquka, izinamathiseli ze-RDP polymer nazo zimelana kakhulu nomswakama. Izakhiwo zekhonkrithi ezivezwa emanzini noma umswakama isikhathi eside zingadala izinkinga ezahlukahlukene, kufaka phakathi ukuqhekeka, ukuqhekeka kanye nokugqwala. Izihlanganisi ze-RDP polymer ziqukethe izinto ezithinta amanzi ezisiza ekuxosheni umswakama, zinciphise ingozi yalezi zinkinga futhi zithuthukise ukusebenza kwesikhathi eside kwezakhiwo zekhonkrithi.
Ukusetshenziswa kwezinamathelisi ze-RDP polymer nakho kunobungani nemvelo. Ngokungafani nezingxube zekhonkrithi zendabuko, ezivame ukudinga inani elikhulu le-Portland cement, umthombo omkhulu wokukhishwa kwekhabhoni, izihlanganisi ze-RDP polymer zingasebenzisa inani elincane ukuze zifinyelele izinga elifanayo lokusebenza. Lokhu kunciphisa umthelela wekhabhoni wengxube yekhonkrithi futhi kusiza ekunciphiseni umthelela wemvelo wokwakha.
Naphezu kwezinzuzo zazo eziningi, kunezinselele ezithile ezihambisana nokusebenzisa ama-RDP polymer binders kukhonkolo. Enye yezinselele ezinkulu isidingo sokulawula ngokucophelela umthamo kanye nokuxuba ama-polymer binders ukuqinisekisa ukusebenza kahle. Ama-binder amancane kakhulu abangela ukunamathela okunciphile kanye nokuqina, kuyilapho ama-binder amaningi kakhulu ebangela amandla anciphile kanye nokusebenza okunciphile. Ngakho-ke, kubalulekile ukusebenza nomhlinzeki wekhonkolo onolwazi oqonda izakhiwo zama-RDP polymer binders futhi angasiza ekwenzeni ngcono ukusetshenziswa kwawo ezicelweni ezithile.
Kunezinzuzo eziningi zokusebenzisa ama-RDP polymer binders kukhonkrithi esebenza kahle kakhulu. Kuthuthukisa ukuqina nokuguquguquka kwengxube yekhonkrithi, kuthuthukisa ukumelana kwayo nomswakama, futhi kunomthelela ophansi kwezemvelo kunengxube yekhonkrithi yendabuko. Ngenkathi ukusetshenziswa kwazo kuletha izinselele ezithile, ukuhlanganisa ngokucophelela nokuxuba kungaveza imiphumela emihle kakhulu futhi kuholele ekudalweni kwezakhiwo zekhonkrithi eziqinile nezihlala isikhathi eside. Ama-adhesive e-RDP polymer ayisinqumo esihle kakhulu kulabo abafuna ukwakha izakhiwo zekhonkrithi ezingamelana nezimo ezinzima futhi zinikeze ukusebenza okuthembekile ngokuhamba kwesikhathi.
Isikhathi sokuthunyelwe: Okthoba-16-2023