Isingeniso ngokuthuthuka okuqhubekayo kwezidingo zemboni yezokwakha zokusebenza kokhonkolo, amandla, ukuqina kanye nokwenza ukhonkolo kuthola ukunakwa okubanzi. Mayelana nokwenza ngcono ukusebenza kokhonkolo, ukusetshenziswa kwe-admixture kuyindlela ebalulekile. I-Hydroxypropyl Methylcellulose (HPMC), njengokwahlanganiswa okujwayelekile kwamakhemikhali, kusetshenziswe kabanzi ekwakhiweni, embonweni, uGypsum, ngodaka kanye nezinye izinkambu. Njenge-ether ye-cellulose engenamanzi, inokuqina okuhle, ukugcinwa kwamanzi, ukwakheka kwamafilimu kanye nokwenza ngcono ukusebenza kokwakha. Kodwa-ke, umphumela we-HPMC ekubuthakathaka kokhonkolo kuseyisihloko okufanele sifunde.
Izakhiwo eziyisisekelo ze-HPMC HPMC iyinhlangano yemvelo ye-polymer engenakuncibilika emanzini, imvamisa etholakala ngokuguqula amakhemikhali amakhembu, nge-hydrophility ethile kanye nokunamathelisa. Ngokhonkolo, i-HPMC ikakhulukazi idlala indima yokuqina, ukugcinwa kwamanzi, ukuthuthukisa uxhaso, kanye nesikhathi sokusebenza. Kungathuthukisa uketshezi nokwakhiwa kukakonasi kasimende, ngaleyo ndlela kuthuthukise ukusebenza kokhonkolo.
Umphumela we-HPMC ku-Conccrete density
Ukugcinwa kwamanzi kwe-HPMC ku-Cement Paste HPMC kunokusebenza okuqinile kokugcinwa kwamanzi, okunganciphisa ngempumelelo inqubo yokuhwamuka kwamanzi futhi kugcinwe isendaweni ye-hydration ka usimende we-can. Ikakhulu ekushiseni okuphezulu noma kwemvelo eyomile, umphumela wokugcinwa kwamanzi we-HPMC ubaluleke kakhulu. Ukusabela kwe-hydration kwe-Cement Paste kudinga ukwesekwa okwanele kwamanzi. Uma amanzi evele evele ngokushesha, izinhlayiya zensimbi ngeke zifakwe ngama-hydrate ngokugcwele, zakha ama-pores, ezizothinta ubungako bekhonkolo. I-HPMC ibambezele ukuhwamuka kwamanzi ukuqinisekisa ukuthi izinhlayiya zosekhukhweni zingagcwala ama-hydrate ngokuphelele, ngaleyo ndlela zithuthukise ubungako bekhonkolo.
Umphumela we-HPMC ku-Concrete Fluidity HPMC, njengoMkhulu, angathuthukisa uketshezi lukakhonkolo. Inani elifanele le-HPMC lingenza ukhonkolo ube noshukela omuhle futhi wehlise ukuhlukaniswa kokhonkolo kokhonkolo lapho kuthulula. Ukhonkolo onokhonkolo onobuhle obungcono ungagcwalisa kangcono isikhunta ngesikhathi sokupalula, ukunciphisa isizukulwane samabhamuza kanye nama-voids, futhi uthuthukise ubungako bekhonkolo. Kodwa-ke, uma umthamo we-HPMC usukhulu kakhulu, kungadala ukuthi i-viscosity yekhonkolo ibe qotho kakhulu, ithinte okusebenzayo kokhonkolo, okwenza kube nzima, futhi kungahle kubangele ukuthi ama-voids ekhonkolo angakwazi ukugcwala ngokuphelele, ngaleyo ndlela athinta ubungako.
Ukungafani kwe-HPMC ye-Cement Inani elifanele le-HPMC lingathuthukisa ukungafani kwezinhlayiya zosekhukhwini emanzini futhi lenze izinhlayiya zomathela Ukusatshalaliswa okufanayo kwezinhlayiya kasimende kusiza ukunciphisa i-agglomeration yezinhlayiya ezinkulu ngokhonkolo, ngaleyo ndlela kunciphise ukukhuphuka kokhonkolo. Uma umthamo we-HPMC mkhulu kakhulu, kungadala ukuthi amandla obugqi phakathi kwezinye izinhlayiya ziqine kakhulu, okuphumela ekubonakaleni ngokweqile kwesikejana sokwenza usimende, okuthinta i-hydration yekhonkolo kasimende nokuhlangana kokhonkolo.
Umthelela we-HPMC kwinqubo elukhuni ye-Concrete HPMC edlala indima ekubambezeleni ukusabela kwesimende noma inqubo eshisayo yokushisa kokhonkolo futhi ibambezela ngempumelelo inqubo ephezulu yekhonkolo, ibambeze ngempumelelo inqubo esheshayo ye-ukhonkolo, ngaleyo ndlela ithuthukise ubungako bekhonkolo. Inqubekelaphambili ehamba kancane yokusabela kukaCement Hydration isiza ukwakha ijeli ye-FET CEMET, yehlisa ukwakheka kwama-pores, futhi athuthukise ukuhlanganiswa kokhonkolo okuphelele. Kodwa-ke, uma umthamo we-HPMC uphezulu kakhulu, kungadala ukubambezeleka ngokweqile kwinqubo ye-hydration, okuthinta ukuthuthukiswa kwamandla nokuqina kokhonkolo.
Umphumela we-HPMC ekulweni kwekhonkolo lapho i-HPMC ine-hydrophilicity eqinile, inganciphisa ngempumelelo ama-microcracks kanye nama-pores kukhonkolo, ngaleyo ndlela enze ngcono ukungapheleli kukakhonkolo. Ngokwandisa umthamo we-HPMC, ubuningi bezinkamba ngokhonkolo bungathuthukiswa, ukungena kwemidiya yangaphandle efana namanzi namakhemikhali kungancishiswa, futhi ukuqina kokhonkolo kungathuthukiswa.
Uhla oluphelele lomthamo we-HPMC ngokuya ngocwaningo lokuhlola, umphumela wethamo le-HPMC ngobuningi bukakhonkolo yi-BIDIRETE, futhi ayikwazi ukuba ngaphansi kakhulu noma phezulu kakhulu. Lapho umthamo uphansi kakhulu, umphumela wokuqina we-HPMC awanele futhi awukwazi ukuthuthukisa ngempumelelo uketshezi nokugcinwa kwamanzi ngokhonkolo; Lapho umthamo uphezulu kakhulu, kungahle kudale ukubonakala ngokweqile kokhonkolo, kuthinte ukusebenza kokwakha, futhi kubangele ngisho izikhala nezimbobo. Ngakho-ke, umthamo we-HPMC kufanele alawulwe ngaphakathi kwebanga elifanele. Ngokusho kwemininingwane ehlukene yocwaningo, umthamo we-HPMC ngokuvamile alawulwa phakathi kuka-0,1% no-0.3%. Umthamo ophakeme kakhulu noma ophansi kakhulu uzoba nomphumela omubi ekubunjweni kanye nezinye izakhiwo zikakhonkolo.
Umphumela wethango le-HPMC ngobuningi bekhonkolo bubonakala ngokukhethekile emthethweni wawo wokulawula ekugcinweni kwamanzi, uketshezi, ukungafani kwezinhlayiya zensimbi kanye nenqubo yokuqina kasimende. Inani elifanele le-HPMC lingathuthukisa ukusebenza kokhonkolo kakhonkolo, thuthukisa ubungako bekhonkolo, futhi bathuthukise amandla nokuqina kwalo. Kodwa-ke, umthamo ophakeme kakhulu noma ophansi kakhulu uzoba nomphumela omubi ekubuthakathaka kokhonkolo. Ngakho-ke, kuzinhlelo zokusebenza ezisebenzayo, umthamo we-HPMC kumele ukhethwe ngokufanele ngokwezidingo zokusetshenziswa kanye nezimo zemvelo zokhonkolo ukuze uzuze ukusebenza kokhonkolo okuhle kakhulu.
Isikhathi sePosi: Feb-15-2025