Isiphumo seHydroxyethyl Methyl Cellulose (HEMC) kwixesha lokubeka izinto kwiConcrete Admixtures

Ixesha lokuseta ikhonkrithi liyiparameter ebalulekileyo echaphazela umgangatho kunye nenkqubela yokwakha. Ukuba ixesha lokuseta lide kakhulu, linokukhokelela ekucothweni kwenkqubela yokwakha kwaye lonakalise umgangatho wokuqina kwekhonkrithi; ukuba ixesha lokuseta lifutshane kakhulu, linokukhokelela kwiingxaki ekwakheni ikhonkrithi kwaye lichaphazele isiphumo sokwakha seprojekthi. Ukuze kulungiswe ixesha lokuseta ikhonkrithi, ukusetyenziswa kwezinto ezidityanisiweyo kuye kwaba yindlela eqhelekileyo kwimveliso yanamhlanje yekhonkrithi.I-Hydroxyethyl Methyl Cellulose (HEMC), njenge-modified cellulose derivative eqhelekileyo, isetyenziswa kakhulu kwi-concrete admixtures kwaye inokuchaphazela i-rheology, ukugcinwa kwamanzi, ixesha lokubeka kunye nezinye iimpawu zeconcrete.1. Iimpawu ezisisiseko ze-HEMC

I-HEMC yi-cellulose eguquliweyo, edla ngokwenziwa nge-cellulose yendalo ngokusebenzisa i-ethylation kunye ne-methylation reactions. Ineempawu ezilungileyo zokunyibilika kwamanzi, ukutyeba, ukugcinwa kwamanzi kunye ne-gelling, ngoko ke isetyenziswa kakhulu ekwakheni, kwiingubo, kwiikhemikhali zemihla ngemihla nakwezinye iindawo. Kwikhonkrithi, i-HEMC idla ngokusetyenziswa njenge-thickener, i-arhente yokugcina amanzi kunye ne-arhente yolawulo lwe-rheology, enokuphucula ukusebenza kwekhonkrithi, yonyuse ukunamathela kwaye yandise ixesha lokuseta.

2. Impembelelo ye-HEMC kwixesha lokuseta ikhonkrithi
Ukulibazisa ixesha lokuseta
Njenge-cellulose derivative, i-HEMC inenani elikhulu lamaqela athanda amanzi kwisakhiwo sayo se-molecular, anokusebenzisana nee-molecule zamanzi ukwenza ii-hydrate ezizinzileyo, ngaloo ndlela kulibazisa inkqubo yokufunxa isamente ukuya kwinqanaba elithile. Indlela yokufunxa isamente yindlela ephambili yokuqinisa isamente, kwaye ukongezwa kwe-HEMC kunokuchaphazela ixesha lokuseta ngeendlela ezilandelayo:

Ukugcinwa kwamanzi okwandisiweyo: I-HEMC inokuphucula kakhulu ukugcinwa kwamanzi kwikhonkrithi, inciphise izinga lokuphuma kwamanzi emkhenkceni, kwaye yandise ixesha lokusabela kokufuma kwesamente. Ngokugcina amanzi, i-HEMC inokuthintela ukulahleka kwamanzi okugqithisileyo, ngaloo ndlela ilibazise ukwenzeka kokubekwa kokuqala nokugqibela.

Ukunciphisa ubushushu bokufuma: I-HEMC inokuthintela ukungqubana kunye nokusabela kokufuma kwamasuntswana esamente ngokunyusa i-viscosity yekhonkrithi kunye nokunciphisa isantya sokuhamba kwamasuntswana esamente. Izinga lokufuma eliphantsi linceda ukulibazisa ixesha lokuseta ikhonkrithi.

Uhlengahlengiso lwe-Rheological: I-HEMC inokulungisa iipropati ze-rheological zekhonkrithi, yonyuse i-viscosity yayo, kwaye igcine i-concrete paste ikwi-fluidity entle kwasekuqaleni, iphephe ubunzima bokwakha obubangelwa kukuxinana kakhulu.

Izinto ezinefuthe
Isiphumo seI-HEMCngexesha lokumisela akupheleli nje ngokusondeleyo kwidosi yayo, kodwa kuchaphazeleka nezinye izinto zangaphandle:

Ubunzima beemolekyuli kunye nenqanaba lokutshintshwa kwe-HEMC: Ubunzima beemolekyuli kunye nenqanaba lokutshintshwa (inqanaba lokutshintshwa kwe-ethyl kunye ne-methyl) ye-HEMC zinempembelelo enkulu ekusebenzeni kwayo. I-HEMC enobunzima beemolekyuli obuphezulu kunye nenqanaba eliphezulu lokutshintshwa inokuhlala isenza isakhiwo senethiwekhi esomeleleyo, ibonise ukugcinwa kwamanzi okungcono kunye neempawu zokutyeba, ngoko ke isiphumo sokulibaziseka kwixesha lokuseta sibaluleke ngakumbi.

Uhlobo lwesamente: Iindidi ezahlukeneyo zesamente zinezinga lokufunxa amanzi ezahlukeneyo, ngoko ke impembelelo ye-HEMC kwiinkqubo ezahlukeneyo zesamente nayo yahlukile. Isamente eqhelekileyo yasePortland inezinga lokufunxa amanzi ngokukhawuleza, ngelixa enye isamente enobushushu obuphantsi okanye isamente ekhethekileyo inezinga lokufunxa amanzi kancinci, kwaye indima ye-HEMC kwezi nkqubo inokuba yinto ephawulekayo.

Iimeko zendalo: Iimeko zendalo ezifana nobushushu kunye nokufuma zinempembelelo ebalulekileyo kwixesha lokubeka i-concrete. Amaqondo obushushu aphezulu aya kukhawulezisa ukusabela kokufuma kwe-samente, nto leyo ebangela ukuba ixesha lokubeka libe lifutshane, kwaye impembelelo ye-HEMC kwiindawo zemozulu ezinobushushu obuphezulu inokuba buthathaka. Ngokwahlukileyo koko, kwiindawo zemozulu ezinobushushu obuphantsi, impembelelo yokulibaziseka ye-HEMC inokuba sobala ngakumbi.

Uxinzelelo lwe-HEMC: Uxinzelelo lwe-HEMC lumisela ngokuthe ngqo umlinganiselo wempembelelo yayo kwikhonkrithi. Uxinzelelo oluphezulu lwe-HEMC lunokunyusa kakhulu ukugcinwa kwamanzi kunye nokwakheka kwekhonkrithi, ngaloo ndlela kulibazisa ngokufanelekileyo ixesha lokubeka, kodwa i-HEMC egqithisileyo inokubangela ukungaguquguquki kakuhle kwekhonkrithi kwaye ichaphazele ukusebenza kolwakhiwo.

Isiphumo sokusebenzisana kwe-HEMC kunye nezinye izinto ezidityanisiweyo
I-HEMC idla ngokusetyenziswa nezinye izinto ezidityanisiweyo (ezifana nezinto ezinciphisa amanzi, izinto ezidityanisiweyo, njl.njl.) ukulungisa ngokupheleleyo ukusebenza kwekhonkrithi. Ngokubambisana nabadityanisiweyo, isiphumo sokulibaziseka kwe-HEMC sinokuphuculwa ngakumbi. Umzekelo, isiphumo sokusebenzisana kwezinto ezithile ezidityanisiweyo ezifana neephosphates kunye nezinto ezidityanisiweyo zeswekile kunye ne-HEMC sinokulandisa kakhulu ixesha lokuseta ikhonkrithi, elifanelekileyo kwiiprojekthi ezikhethekileyo kwiindawo ezishushu okanye ezifuna ixesha elide lokwakha.

3. Ezinye iziphumo ze-HEMC kwiimpawu zekhonkrithi

Ukongeza ekulibaziseni ixesha lokuseta, i-HEMC ikwanefuthe elibalulekileyo kwezinye iimpawu zekhonkrithi. Umzekelo, i-HEMC inokuphucula ukugeleza, ukuchasana nokwahlulwa, ukusebenza kokumpompa kunye nokuqina kwekhonkrithi. Ngelixa ilungisa ixesha lokuseta, iziphumo zokutyeba kunye nokugcinwa kwamanzi ze-HEMC zinokuthintela ngempumelelo ukwahlulwa okanye ukopha kwekhonkrithi, kwaye ziphucule umgangatho kunye nozinzo lwekhonkrithi iyonke.

I-Hydroxyethyl methylcellulose (HEMC) inokulibazisa ngokufanelekileyo ixesha lokuseta ikhonkrithi ngenxa yokugcina kwayo amanzi kakuhle, ukuqina kwayo kunye nemiphumo yayo yokulawula i-rheological. Ubungakanani bempembelelo ye-HEMC buchaphazeleka zizinto ezifana nobunzima bayo be-molecular, ubungakanani bokutshintshwa kwayo, uhlobo lwesamente, indibaniselwano yokuxuba kunye neemeko zokusingqongileyo. Ngokulawula ngokufanelekileyo umthamo kunye nomlinganiselo we-HEMC, ixesha lokuseta linokwandiswa ngokufanelekileyo ngelixa kuqinisekiswa ukusebenza kokwakhiwa kwekhonkrithi, kwaye ukusebenza kunye nokuqina kwekhonkrithi kunokuphuculwa. Nangona kunjalo, ukusetyenziswa kakhulu kwe-HEMC kunokubangela iziphumo ezimbi, njengokungamanzi kakuhle okanye ukufuma okungaphelelanga, ngoko ke kufuneka isetyenziswe ngononophelo ngokweemfuno zobunjineli zokwenyani.