I-HPMC (HYDROXYPROPYL Methylcellulose)Ingabe impahla yamakhemikhali ye-polymer esetshenziswa embonini yezokwakha. Kusetshenziswa kabanzi ngodaka olususelwa kuso usimende, udaka olomile, ukunamathela kanye neminye imikhiqizo ukuqina, ukugcina amanzi, ukuthuthukisa kunemisebenzi eminingi efana nokunamathela kanye nokusebenza okuthuthukile kokwakha. Indima yayo kudaka ibaluleke kakhulu, ikakhulukazi ekwenzeni ngcono ukumelana nokuqhekeka kodaka.
1. Ukugcinwa kwamanzi okuthuthukisiwe
I-HPMC inokugcinwa okuhle kwamanzi, okusho ukuthi amanzi ngeke avele ngokushesha ngesikhathi senqubo yokwakha yodaka, ngaleyo ndlela agweme ukuqhekeka okubangelwa ukuncipha kwamanzi ngokweqile. Ikakhulu ezindaweni ezomile nezishisa kakhulu, umphumela wokugcinwa kwamanzi we-HPMC uvelele ikakhulukazi. Umswakama ososimende ungahlala uzinzile okwesikhashana isikhathi esithile sokugwema ukoma ngaphambi kwesikhathi, okubaluleke kakhulu ukuthuthukisa ukumelana nodaka. Ukugcinwa kwamanzi kungabambezela inqubo ye-hydration ka usimende, okuvumela izinhlayiya zosekhulile ukuthi ziphendule ngokuphelele ngamanzi isikhathi eside, ngaleyo ndlela kuthuthukise ukumelana nodaka kodaka.
2. Thuthukisa ukunamathela kodaka
Njengomkhulu, i-HPMC ingakha isakhiwo esihle senethiwekhi yamangqamuzana ku-mendes ukuthuthukisa ukunamathela noketshezi lodaka. Lokhu akugcini nje ngokuthuthukisa amandla eBonding phakathi kosimende kanye nongqikithi wesisekelo futhi kunciphisa ukuqhekeka kwesendlalelo se-interface, kepha futhi kuthuthukisa ubulukhuni bodaka olubonakalayo futhi kunciphisa ukwenzeka okubangelwa amabutho angaphandle ngesikhathi senqubo yokwakha. Ukunamathelisa okuhle kwenza umfaniswano kadaka ngokwengeziwe ngesikhathi sokwakha futhi kunciphise ukuqhekeka okubangelwa ukushuba okungalingani emalungeni.
3. Thuthukisa i-plastiki nokusebenza kodaka
I-HPMC ithuthukisa i-plasticity nokusebenza kodaka, okungathuthukisa ngempumelelo lula ukwakhiwa. Ngenxa yomphumela wokuqina kwalo, i-HPMC ingenza udaka abe nokunamathela okungcono nokwakheka, ukunciphisa ngokuphumelelayo okuvela kwemifantu okubangelwa ngodaka olungalingani nolwengelu olungelona ingozi ngesikhathi sokwakha. I-plastic enhle yenza ukuthi udaka lugcizelele ngokulinganayo ngesikhathi sokomiswa nokuncipha, ukunciphisa amathuba okufakelwa ngenxa yokucindezela okungalingani.
4. Yehlisa imifantu eshisayo
I-Shrinkage eyomile yi-shrinkage yevolumu ebangelwa ukuhwamuka kwamanzi ngesikhathi senqubo yokomisa ngodaka. I-shrinkage eyeqile eyomile izodala imifantu ebusweni noma ngaphakathi kodaka. I-HPMC yehlisa ukuhwamuka ngokushesha kwamanzi futhi yehlisa ukwenzeka kokwehla kwe-shrinkage eyomile ngokugcinwa kwayo okuphezulu kwemiphumela ephezulu yepulasitiki. Ucwaningo lukhombisa ukuthi udaka olungezwe nge-HPMC lunesilinganiso esiphansi sokumisa kanye nevolumu yalo lishintsha kancane ngesikhathi senqubo yokomisa, ngaleyo ndlela ukuvikela imifantu ebangelwa ukumiswa kwe-shrinkage. Okwezindonga ezinde noma ezansi, ikakhulukazi e-Hot Summer noma endaweni evuthayo kanye nomoya, indima ye-HPMC ibaluleke kakhulu.
5. Thuthukisa ukumelana nokuqhekeka kodaka
Ukwakheka kwamangqamuzana kwe-HPMC kungakha ukusebenzisana okuthile kwamakhemikhali nge usimende nezinye izinto ze-inorganic ku-datar, okwenza udaka lube nokumelana nokuqina. Lokhu kwathuthukiswa kwamandla okuqhekeka akuveli kuphela ngokuhlanganiswa ne-HPMC ngesikhathi senqubo ye-Cement Hydration, kepha futhi kuthuthukisa ubunzima bodaka ngezinga elithile. Ubulukhuni bodaka ngemuva kokuqina luthuthukiswa, okusiza ukumelana nengcindezi enkulu yangaphandle futhi akuthambekele ekuqhekekeni. Ikakhulu ezindaweni ezinokwehluka kokushisa okukhulu noma ushintsho olukhulu emithwalweni yangaphandle, i-HPMC ingathuthukisa ngempumelelo ukumelana nokuqhekeka kodaka.
I-6. Khulisa ukungapheleli kodaka
Njenge-organic polymer impahla, i-HPMC ingakha isakhiwo senethiwekhi ye-microscopic ku-datar ukuthuthukisa ukuhlanganiswa kodaka. Lesi sici senza udaka olungafinyeleleki futhi anciphise ukuvumela umswakama neminye imidiya yangaphandle. Endaweni enomswakama noma enamanzi, imifantu ebusweni kanye nangaphakathi kodaka kungenzeka ukuthi kuhlaselwe umswakama, okuholela ekunwetshisweni okwengeziwe kwemifantu. Ukungezwa kwe-HPMC kunganciphisa ngempumelelo ukungena kwamanzi futhi kuvimbela ukwanda kokufakelwa okubangelwa ukungena kwamanzi, ngaleyo ndlela kuthuthukise ukumelana nokuqhekeka kodaka ngezinga elithile.
7. Vimbela isizukulwane nokwanda kwemifantu emincane
Ngesikhathi senqubo yokomisa neyokuqinisa ngodaka, imifantu emincane evame ukwenzeka ngaphakathi, futhi le mifantu emincane ingakhula kancane kancane futhi yakha imifantu ebonakalayo ngaphansi kwesenzo samabutho angaphandle. I-HPMC ingakha isakhiwo senethiwekhi eyunifomu ngaphakathi kodaka ngesakhiwo sayo samangqamuzana, ukunciphisa amathuba okuqhekeka okuncane. Noma kwenzeka uma kwenzeka, i-HPMC ingadlala indima ethile yokulwa nokulwa nokubavimbela ekunwetshisweni okwengeziwe. Lokhu kungenxa yokuthi amaketanga e-polymer we-HPMC angahlakaza ngempumelelo ukucindezelwa ezinhlangothini zombili zokuqhekeka ngokuxhumana kwe-intermolecular ku-udaka, ngaleyo ndlela kuvimbela ukwanda kokuqhekeka.
8. Thuthukisa i-modulus ye-enwestic kadaka
I-Elastic Modulus iyinkomba ebalulekile yekhono lokumelana ne-deformation. Ngodaka, i-modulus ephezulu ye-elastic ikwazi ukuyenza iqinile lapho ibhekwe amandla angaphandle futhi mancane amathuba okubangela ukonakala noma ukuqhekeka okwedlulele. Njengomhlaka, i-HPMC ingakhuphula i-modulos yayo ebanzi ngodaka, ivumela udaka ukuba alondoloze kangcono ukwakheka kwawo ngaphansi kwesenzo samandla angaphandle, ngaleyo ndlela anciphise ukwenzeka kwemifantu.
I-HPMCIthuthukisa ngempumelelo ukumelana nodaka kwezici eziningi ngokwenza ngcono ukugcinwa kwamanzi, ukunqwabelana, ukuthuthuka nokusebenza kwamandla okumelana owomile, kanye nokwenza ngcono amandla okumelana owomile, okungafanele kanye ne-modulus e-elastic. ukusebenza. Ngakho-ke, ukusetshenziswa kwe-HPMC odongeni lokwakha akunakuthuthukisa ukumelana nokuqhekeka kodaka, kodwa futhi kuthuthukisa ukusebenza kokwakha futhi kwandise impilo yenkonzo yodaka.
Isikhathi sePosi: Dece-16-2024