I-Hydroxypropylmethylcellulose (HPMC) yikhompawundi eguquguqukayo esetyenziswa ngokuqhelekileyo kushishino lokwakha, kubandakanywa ukwakhiwa kwekhonkrithi.Nangona ingenakuphucula ngokuthe ngqo ukuqina kwekhonkrithi, idlala indima ebalulekileyo ekuphuculeni iipropati ezahlukeneyo zomxube wekhonkrithi.
1. Intshayelelo ye-hydroxypropyl methylcellulose:
IHydroxypropyl methylcellulose (HPMC) yi-ether ye-cellulose elungisiweyo ephuma kwiipolima zendalo.Ngenxa yeempawu zayo ezizodwa, isetyenziswa ngokubanzi njengesongezo kwizinto zokwakha.Kwikhonkrithi, i-HPMC iqhele ukusetyenziswa njenge-arhente yokugcina amanzi, i-thickener, kunye ne-binder.Ubume balo beekhemikhali buvumela ukuba yenze ifilimu ekhuselayo malunga neengqungquthela ze-samente, ezichaphazela i-rheological and mechanical properties of the concrete mix.
2.Indima ye-HPMC kukuqina kwekhonkrithi:
Ukugcinwa kwamanzi kunye nokusebenza:
I-HPMC isebenza njenge-arhente yokugcina amanzi, ikhusela ukulahleka kwamanzi amaninzi ngexesha lokuqala lokunyanga ikhonkrithi.
Oku kuphuculwa kokugcinwa kwamanzi kunceda ukugcina ukusebenza kakuhle, okukhokelela ekubekweni okungcono kunye nokuxinwa kwekhonkrithi.
Yandisa ukunamathela:
Iimpawu zokwenza ifilimu ye-HPMC inceda ukuphucula ukubambelela phakathi kweengqungquthela zesamente, okubangelwa i-matrix yekhonkrithi edibeneyo kunye neyomelele.
Nciphisa ukwahlukana kunye nokopha:
I-HPMC inceda ukunciphisa umngcipheko wokwahlula kunye nokopha kwimixube yekhonkrithi, okukhokelela kwiyunifomu engaphezulu, imveliso yokuphela kwesakhiwo.
Ixesha lokumisela eliphuculweyo:
Ukusetyenziswa kwe-HPMC kunokuchaphazela ixesha lokumisela ikhonkrithi, ngaloo ndlela ibonelela ngokulinganisela phakathi kokusebenza kunye nophuhliso lwamandla olukhawulezileyo.
Impembelelo kwiipropati zoomatshini:
Ngelixa i-HPMC ngokwayo ayinako ukuqinisa ngokuthe ngqo ukuqina kwekhonkrithi, umphumo wayo ekusebenzeni kunye nokunamathela kunokuchaphazela ngokungathanga ngqo iipropati ze-mechanical zekhonkrithi, inceda ukudala izakhiwo ezomeleleyo kunye nezizinzileyo.
3. Amanqaku kunye neendlela ezingcono:
Ulawulo lomthamo:
Umthamo ochanekileyo we-HPMC ubalulekile.Ukugqithisa ngokweqile kunokubangela iziphumo ezibi, ngelixa ukugqithiswa kwedosi kusenokunganikeli uphuculo olufunekayo.
ukuhambelana:
Ukuhambelana nezinye ii-concrete admixtures kunye nezixhobo kufuneka ziqwalaselwe ukuphepha nayiphi na impendulo engalunganga enokuthi iphazamise iipropati zomxube wekhonkrithi.
Indlela yokunciphisa:
Nangona i-HPMC inceda ukugcina amanzi, iindlela ezifanelekileyo zokunyanga kufuneka zisetyenziswe ukuqinisekisa ukuqina kwexesha elide lekhonkrithi.
Nangona i-HPMC ayisiyiyo i-arhente ethe ngqo ephucula ukuqina kwekhonkrithi, ukusetyenziswa kwayo kwimixube yekhonkrithi kunokuphucula ukusebenza, ukunamathela, kunye nezinye iipropati, ngokuphucula ngokungathanga ngqo ukuqina okupheleleyo kwezakhiwo eziphathekayo.I-HPMC kufuneka ithathelwe ingqalelo njengenxalenye yendlela edibeneyo yoyilo lomxube wekhonkrithi kunye nezenzo zokwakha ukuze kuphunyezwe izakhiwo ezihlala ixesha elide kunye nezomelele.
Ixesha lokuposa: Jan-19-2024