HPMC For Concrete Admixture

IHydroxypropyl Methylcellulose (HPMC) sisongezo esisetyenziswa ngokubanzi kwi-concrete admixtures ngenxa yeempawu zayo ze-rheological, umthamo wokugcina amanzi, kunye nokukwazi ukuphucula ukusebenza kunye nokusebenza kwemixube yekhonkrithi. Nantsi indlela i-HPMC esetyenziswa ngayo kwimixube ebambekayo:

1. Ukugcinwa kwamanzi: I-HPMC ineempawu ezibalaseleyo zokugcina amanzi, oku kuthetha ukuba inokugcina amanzi ngaphakathi komxube wekhonkrithi. Oku kunceda ukuthintela ukulahleka kwamanzi ngokukhawuleza, ngokukodwa kwiimeko ezishushu okanye ezinomoya, okuvumela ukuba i-hydration engcono yeengqungquthela zesamente kunye nokuphucula amandla kunye nokuqina kwekhonkrithi.
2. Ukuphuculwa kokuSebenza: I-HPMC isebenza njenge-rheology modifier, iphucula ukusebenza kunye nokuhambelana kwemixube yekhonkrithi. Inceda ukunciphisa i-viscosity yomxube, okwenza kube lula ukumpompa, ukubeka, kunye nokugqiba. Oku kuluncedo ngakumbi kwikhonkrithi yokuziphakamisa, ukumpompa ikhonkrithi, kunye nezicelo apho kufunwa ukusebenza okuphezulu.
3. Ukuphuculwa koBumbano kunye nokuBambisana: I-HPMC iphucula ubumbano kunye neempawu zokubambelela kwikhonkrithi, ekhokelela ekudibaniseni okungcono phakathi kwamaqhekeza kunye nokuphuculwa kweempawu zomatshini zekhonkrithi eqinile. Oku kubangela ulwahlulo oluncitshisiweyo kunye nokuphuma kwegazi, kunye nokuphuculwa kokugqiba kunye nokubonakala.
4. Ixesha lokumisela eliLawulwayo: Ngokulawula izinga le-hydration yesamente, i-HPMC inokunceda ukulungelelanisa ixesha lokumisela imixube yekhonkrithi. Oku kuluncedo kwiimeko apho ukulibaziseka ukusetwa okanye ixesha elongeziweyo lokusebenza lifunekayo, okuvumela ukulawula okungcono ukubekwa kunye nokugqitywa kwekhonkrithi.
5. Ukuhambelana nezinye ii-Admixtures: I-HPMC iyahambelana noluhlu olubanzi lwezinye ii-concrete admixtures, kuquka i-air-entraining agents, i-plasticizers, i-superplasticizers, kunye ne-retarders. Ingasetyenziselwa ngokudibeneyo nezi zongezo ukufezekisa iimfuno ezithile zokusebenza kunye nokulungelelanisa iimpawu zekhonkrithi ukuhlangabezana neemfuno zeprojekthi.
6. Idosi kunye nesicelo: Idosi ye-HPMC kwi-concrete admixtures isuka kwi-0.1% ukuya kwi-0.5% ngobunzima bezinto zesamente, ngokuxhomekeke kwiimpawu zokusebenza ezifunwayo kunye neemfuno zomxube wekhonkrithi. Ngokuqhelekileyo yongezwa kumxube wekhonkrithi ngexesha lokuxuba, mhlawumbi njengomgubo owomileyo okanye njengesisombululo esixutywe ngaphambili.

I-HPMC sisongezo esisebenza ngeendlela ezininzi esibonelela ngeenzuzo ezininzi kwiingxube zekhonkrithi, kubandakanywa nokusebenza okuphuculweyo, ukugcinwa kwamanzi, ukudibanisa, ukunamathela, kunye nexesha lokumisela elilawulwayo. Ukusetyenziswa kwayo kunokukhokelela ekuvelisweni komgangatho ophezulu wokuxutywa kwekhonkrithi kunye nokusebenza okuphuculweyo kunye nokuqina.