IHydroxypropyl methylcellulose (HPMC) yinto ebalulekileyo eyongeziweyo yeekhemikhali esetyenziswa kakhulu kulwakhiwo nakwimimandla yobunjineli bezinto, ngakumbi kwikhonkrithi kunye nodaka. I-HPMC yi-etere eselulosi enyibilikayo enganyibilikiyo emanzini eguqulwe ngokwekhemikhali ukusuka kwimathiriyeli yendalo yepolymer (efana nentlaka yeplanga okanye umqhaphu).
1. Izitshizi kunye neearhente zokugcina amanzi
Indima ephambili ye-HPMC kwikhonkrithi yi-arhente etyebisayo kunye ne-arhente yokugcina amanzi. Emva kokongeza i-HPMC kwisahlulo sekhonkrithi, ukuhambelana kunye ne-viscosity yekhonkrithi kunokuphuculwa kakhulu. Olu phawu luvumela i-HPMC ukuba iphucule ngokufanelekileyo ukusebenza kwekhonkrithi kunye nokunciphisa ukuhamba kunye nokwahlulwa kodaka ngexesha lenkqubo yokwakha. Ukongeza, ukugcinwa kwamanzi kwe-HPMC kwenza kube nzima ukuba amanzi akwikhonkrithi aphuke ngokukhawuleza, ngaloo ndlela akhulise ixesha lokuqala lokumisela ikhonkrithi. Oku kubaluleke ngakumbi kulwakhiwo oluphantsi kweemeko zobushushu obuphezulu ehlotyeni, njengoko kuthintela umphezulu wekhonkrithi ekubeni wome kwaye uqinisekisa ukuba isamente igalelwe amanzi ngokupheleleyo ukuze kwandiswe ukomelela kokugqibela kwekhonkrithi.
2. Libazise ixesha lokujija
Ukuqaliswa kwe-HPMC kunokulibazisa ixesha lokumisela ikhonkrithi. Olu phawu luluncedo ngakumbi kwiimeko zokwakha ezintsonkothileyo, njengeeprojekthi ezinkulu zokugalela ikhonkrithi apho ikhonkrithi ifuna ukusebenza ixesha elide. I-HPMC inqanda isantya se-cement hydration reaction ngokwenza ifilimu ye-adsorption phezu kwamaqhekeza e-samente, ngaloo ndlela yandisa ixesha lokumisela ikhonkrithi. Oku kubonelela abasebenzi bokwakha ixesha elongezelelweyo lohlengahlengiso kunye nokucheba ukuqinisekisa umgangatho wokwakha.
3. Ukusebenza okuchasene nokuqhekeka
Ukuqhekeka kwekhonkrithi yingxaki eqhelekileyo ekwakhiweni kwesakhiwo, kwaye i-HPMC igqwesile ekuphuculeni ukuchasana kwekhonkrithi ekuqhekekeni. Ukugcinwa kwamanzi kunye nesiphumo sokuqina kwe-HPMC sinciphisa ukukhuphuka kwamanzi ngexesha lenkqubo yokuqina kwekhonkrithi, ukuphepha ukucutha kunye nokuqhekeka okubangelwa ukungalingani komswakama. Ukongeza, i-HPMC inokonyusa imodyuli elastiki yekhonkrithi, yenza ikhonkrithi ibe nzima ngakumbi phantsi koxinzelelo, ngaloo ndlela inciphisa umngcipheko wokuqhekeka.
4. Ukuphucula ukungakwazi ukungena
Iimpawu zokunganyangeki zekhonkrithi zibalulekile ekomelezeni kwezakhiwo. I-HPMC inokuphucula ngokubonakalayo ukunganyanzeki kwekhonkrithi ngomsebenzi wayo wokugcina amanzi kunye nokuphucula ubume bepore bekhonkrithi. Isakhiwo sothungelwano esenziwe yi-HPMC kwikhonkrithi sinokuzalisa ngokufanelekileyo i-pores encinci ngaphakathi kwekhonkrithi, ngaloo ndlela inciphisa ukungena kokufuma kunye nezinye izinto ezidliwayo. Oku kunenzuzo kakhulu ekuphuculeni ukuqina kwezakhiwo zekhonkrithi ezifuna ukunyanzeliswa okuphezulu, njengezakhiwo ezingaphantsi komhlaba kunye neetanki zokugcina amanzi.
5. Ukuphucula ukusebenza kolwakhiwo
Enye indima ebalulekileyo ye-HPMC kukuphucula ukusebenza kolwakhiwo lwekhonkrithi. Ekubeni i-HPMC ikwandisa i-viscosity kunye ne-rheology yekhonkrithi, i-fluidity kunye nokubambelela kwekhonkrithi ngexesha lokwakha ziphuculwe kakhulu. Oku akugcini nje ukunciphisa ukulahlekelwa kwezinto eziphathekayo ngexesha lenkqubo yokwakha, kodwa kwakhona kuphucula ukuchaneka kunye nokusebenza kakuhle kokwakhiwa. Umzekelo, ukongeza i-HPMC kwi-shotcrete kunokunciphisa kakhulu ilahleko yokuphinda ibuyele kwekhonkrithi, yandise ukutyeba kolwakhiwo, kwaye yenze umphezulu wolwakhiwo ube mpuluswa kwaye ube mcaba.
6. Ukuphucula ukusebenza kwe-thermal insulation
Kwiintlobo ezithile zekhonkrithi, i-HPMC iphinda isetyenziswe ekuphuculeni iimpawu ze-thermal insulation of the material. Ukuqaliswa kwe-HPMC kunokwenza inani elikhulu lamaqamza amancinci ngaphakathi kwekhonkrithi, enceda ukunciphisa ukuqhutyelwa kobushushu kwaye ngaloo ndlela kuphuculwe ukusebenza kwe-thermal insulation yekhonkrithi. Oku kunexabiso elibalulekileyo lesicelo kwezinye izakhiwo ezikhethekileyo zokwakha ezifana nokugcinwa okubandayo, iindonga ze-thermal insulation, njl.
7. Ukunciphisa ukwahlukana kunye nokuphuma kwegazi
Ukwahlula kunye nokuphuma kwegazi ziingxaki eziqhelekileyo kwikhonkrithi, ngakumbi kwikhonkrithi ephezulu. Ngokwandisa ukuhambelana kwekhonkrithi, i-HPMC inokuthintela ngokufanelekileyo ulwahlulo lwe-concrete aggregates kunye nokunciphisa inani lokuphuma kwamanzi kwikhonkrithi. Oku akugcini nje ukuphucula umgangatho wekhonkrithi, kodwa kwakhona kuqinisekisa i-homogeneity yayo, ngaloo ndlela ukwandisa amandla ayo kunye nokuqina.
8. Ukuphucula ukubambelela
Kwikhonkrithi ethile ekufuneka idityaniswe kwezinye izinto, ezifana ne-adhesive tile okanye udaka lokulungisa, i-HPMC inokuphucula kakhulu ukubambelela kwayo. Ngokwandisa i-viscosity kunye nokuguquguquka kwekhonkrithi, i-HPMC yenza ukuba ikhonkrithi ibe ngcono kwi-bond kunye nomgangatho wesiseko okanye ezinye izinto kunye nokuthintela ukubola kunye nokuwa. Olu phawu lusetyenziswa ngokubanzi kwiinkqubo zokugquma iindonga zangaphandle, ukubeka iithayile kunye nokulungiswa kwekhonkrithi.
Njengesihlomelo sekhemikhali esinamandla, i-HPMC ineenzuzo ezininzi xa isetyenziswa kwikhonkrithi. Ayiphuculi kuphela ukusebenza kwekhonkrithi, yandisa ixesha lokusebenza, iphucula ukuchasana nokuqhekeka kunye nokunganyanzeki, kodwa ikwanyusa ukuqina kunye nobomi benkonzo bekhonkrithi. Kwiiprojekthi zolwakhiwo zangoku, i-HPMC iye yaba sisixhobo esiyimfuneko nesibalulekileyo. Kwixesha elizayo, ngophuhliso oluqhubekayo kunye nokutsha kobuchwepheshe bokwakha, amathuba okusebenza kwe-HPMC kwikhonkrithi aya kuba ebanzi, kwaye kulindeleke ukuba adlale indima enkulu kwizinto ezintsha zokwakha kunye nezakhiwo eziluhlaza.
Ixesha lokuposa: Aug-16-2024