Kwi-mortar esele ilungile, i-ether encinci ye-cellulose kuphela inokuphucula kakhulu ukusebenza kodaka olumanzi. Ingabonwa ukuba i-cellulose ether iyona yongezelela ephambili echaphazela ukusebenza kodaka.
Ukukhetha iintlobo ezahlukeneyo ze-cellulose ethers kunye ne-viscosities eyahlukeneyo, ubukhulu beentlobo ezahlukeneyo, iidigri ezahlukeneyo ze-viscosity kunye neemali ezongezelelweyo ziya kuba nemiphumo eyahlukileyo ekuphuculeni ukusebenza kwe-drymix mortar. Okwangoku, iimasonry ezininzi kunye nodaka lokutyatyekwa lunentsebenzo embi yokugcina amanzi. Amanzi kunye nodaka luya kuhlukana emva kwemizuzu embalwa yokuma. Ngoko ke kubaluleke kakhulu ukongeza i-cellulose ether kudaka lwesamente.
Makhe sijonge ngakumbi indima ye-cellulose ether kudaka lwesamente!
1. I-Cellulose ether--Ugcino lwamanzi
Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-methyl cellulose ether, kwaye ikwayintsebenzo eyenziwa ngabavelisi abaninzi basekhaya be-dry-mix udaka, ngakumbi abo bakwimimandla esemazantsi amaqondo obushushu aphezulu anika ingqwalasela. Kwimveliso yezinto zokwakha, ngakumbi udaka oluyimpuphu eyomileyo, i-cellulose ether idlala indima engenakulinganiswa, ngakumbi ekuveliseni udaka olukhethekileyo (udaka olulungisiweyo), luyinto eyimfuneko kwaye ibalulekileyo.
I-viscosity, i-dosage, ubushushu be-ambient kunye nesakhiwo semolekyuli ye-cellulose ether inempembelelo enkulu ekusebenzeni kwayo kokugcinwa kwamanzi. Phantsi kweemeko ezifanayo, ubukhulu be-viscosity ye-cellulose ether, ngcono ukugcinwa kwamanzi; Okukhona idosi iphezulu, kokukhona kungcono ukugcinwa kwamanzi. Ngesiqhelo, idosi encinci ye-cellulose ether inokuphucula kakhulu ukugcinwa kwamanzi kudaka. Xa i-dosage ifikelela kwindawo ethile, xa iqondo lokugcinwa kwamanzi linyuka, isantya sokugcinwa kwamanzi siyancipha; Xa ubushushu be-ambient bunyuka, ukugcinwa kwamanzi kwe-cellulose ether ngokuqhelekileyo kuyehla. Kodwa ezinye ii-ethers ze-cellulose ezilungisiweyo nazo zinokugcinwa kwamanzi okungcono phantsi kweemeko eziphezulu zokushisa; I-ether yeCellulose enedigri ezisezantsi zokutshintshwa inomsebenzi ongcono wokugcina amanzi.
Iqela le-hydroxyl kwi-cellulose ether molecule kunye ne-athomu ye-oksijini kwi-ether bond iya kudibanisa ne-molecule yamanzi ukuze yenze i-hydrogen bond, iguqule amanzi akhululekile kumanzi adibeneyo, ngaloo ndlela idlala indima enhle ekugcineni amanzi;Iimolekyuli yamanzi kunye ne-cellulose ether molecular chain Interdiffusion ivumela iimolekyuli zamanzi ukuba zingene ngaphakathi kwe-cellulose ether macromolecular chain kwaye ixhomekeke kwimikhosi eqinile yokubopha, ngaloo ndlela yenze amanzi akhululekile, amanzi abanjwe, kunye nokuphucula ukugcinwa kwamanzi kwi-slurry ye-samente; I-ether ye-Cellulose iphucula iipropati ze-rheological ze-cement slurry entsha, i-porous network structure kunye noxinzelelo lwe-osmotic okanye iipropati zefilimu ze-cellulose ether zithintela ukusasazwa kwamanzi.
2. Cellulose ethers - Thickening kunye Thixotropy
I-ether ye-cellulose inika udaka olumanzi kunye ne-viscosity egqwesileyo, enokunyusa kakhulu amandla okudibanisa phakathi kodaka olumanzi kunye nomgangatho wesiseko, kunye nokuphucula ukusebenza kwe-anti-sag yodaka. Isetyenziswa ngokubanzi kudaka lokutyabeka, udaka lwebhondi yezitena kunye nenkqubo yokugquma eludongeni yangaphandle. Isiphumo esityebileyo se-cellulose ether sinokunyusa amandla okulwa nokusasazeka kunye ne-homogeneity yezinto ezixubeneyo ezisanda kuhlanganiswa, ukuthintela ukuchithwa kwezinto kunye nokwahlula. Ingasetyenziselwa kwikhonkrithi yefiber, ikhonkrithi engaphantsi kwamanzi kunye ne-self-compacting concrete.
Umphumo wokuqina we-cellulose ether kwizinto ezisekelwe kwi-samente zivela kwi-viscosity yesisombululo se-cellulose ether. Ngaphantsi kweemeko ezifanayo, ukuphakama kwe-viscosity ye-cellulose ether, ingcono i-viscosity yezinto eziguquliweyo ze-samente, kodwa ukuba i-viscosity iphezulu kakhulu, iya kuchaphazela umbane kunye nokusebenza kwezinto (ezifana nokuncamathela imela yokutyabeka). I-self-leveling mortar kunye ne-self-compacting concrete, efuna i-fluidity ephezulu, idinga i-viscosity ephantsi ye-cellulose ether. Ukongezelela, umphumo wokuqina we-cellulose ether uya kwandisa imfuno yamanzi yezinto ezisekelwe kwi-samente kunye nokwandisa isivuno sodaka.
I-high-viscosity cellulose ether isisombululo samanzi sine-thixotropy ephezulu, ekwayimpawu enkulu ye-cellulose ether. Izisombululo ezimanzi ze-methyl cellulose zihlala zine-pseudoplastic kunye ne-non-thixotropic fluidity ngaphantsi kweqondo lokushisa lejeli, kodwa zibonisa iipropathi ezihamba ngeNewtonian kumazinga aphantsi okucheba. I-Pseudoplasticity iyanda kunye nobunzima be-molecular okanye i-concentration ye-cellulose ether, kungakhathaliseki ukuba luhlobo luni lwe-substitute kunye neqondo lokutshintshwa. Ngoko ke, i-cellulose ethers yebakala elifanayo le-viscosity, nokuba ngaba i-HPMC okanye i-HEMC, iya kuhlala ibonisa iimpawu ezifanayo ze-rheological nje ukuba ugxininiso kunye nobushushu bugcinwa rhoqo. Iigels zesakhiwo zenziwe xa ubushushu buphakanyisiwe, kwaye ukuhamba okuphezulu kwe-thixotropic kwenzeka.
Uxinzelelo oluphezulu kunye ne-viscosity ephantsi ye-cellulose ethers ibonisa i-thixotropy nangaphantsi kweqondo lokushisa le-gel. Lo mhlaba unenzuzo enkulu kuhlengahlengiso lomgangatho kunye nokuncipha kulwakhiwo lodaka lwesakhiwo. Kufuneka kucaciswe apha ukuba i-viscosity ephezulu ye-ether ye-cellulose, ngcono ukugcinwa kwamanzi, kodwa ukuphakama kwe-viscosity ephezulu, ukuphakama kwe-molecular weight ye-cellulose ether, kunye nokuncipha okuhambelanayo kwi-solubility yayo, enefuthe elibi kugxininiso lodaka kunye nokusebenza kolwakhiwo.
3. Cellulose ether - Air-entraining effect
I-ether ye-cellulose inefuthe elicacileyo lokungenisa umoya kwizinto ezintsha ezisekwe kwisamente. I-ether ye-cellulose inamaqela amabini e-hydrophilic (amaqela e-hydroxyl, amaqela e-ether) kunye namaqela e-hydrophobic (amaqela e-methyl, i-glucose rings), kwaye i-surfactant ene-surfactant ye-surface work, ngaloo ndlela ine-air-entraining effect. Umphumo wokungenisa umoya we-cellulose ether uya kuvelisa umphumo "webhola", onokuphucula ukusebenza kwezinto ezixutywe ngokutsha, ezifana nokwandisa iplastiki kunye nokuguquguquka komdaka ngexesha lokusebenza, okulungele ukusasazeka kodaka; kuya kwandisa imveliso yodaka, ukunciphisa iindleko zokuvelisa udaka; kodwa iya kwandisa i-porosity yezinto eziqiniweyo kwaye inciphise iimpawu zayo zomatshini ezifana namandla kunye ne-elastic modulus.
Njenge-surfactant, i-ether ye-cellulose nayo inomanzi okanye i-lubricating effect kumasuntswana e-samente, okwandisa ubuninzi bezinto ezisekelwe kwi-samente kunye ne-air-entraining effect, kodwa umphumo wayo wokuqina uya kunciphisa umbane. Umphumo we-fluidity yindibaniselwano yeplastiki kunye nemiphumo yokuqina. Ngokuqhelekileyo, xa umxholo we-cellulose ether uphantsi kakhulu, umsebenzi oyintloko yiplastiki okanye ukunciphisa amanzi; xa umxholo uphezulu, umphumo wokuqina we-cellulose ether wanda ngokukhawuleza, kwaye umphumo wayo wokungenisa umoya uvame ukuhluthwa. Ngoko ibonisa njengempembelelo yokuqina okanye ukunyuka kwemfuno yamanzi.
4. I-Cellulose Etere - Ukuncipha
Iselulosi etha iya kwandisa ixesha ukusetwa intlama yesamente okanye udaka, kunye nokulibazisa kinetics hydration yesamente, nto leyo eyingenelo ekuphuculeni ukusebenza ixesha izinto ezisanda kuxutywa, ukuphucula ukuhambelana nodaka kunye nokulahlekelwa ukudilika kwekhonkrithi ngokuhamba kwexesha, kodwa kunokubangela ukulibaziseka kwenkqubela phambili yokwakha.
Ixesha lokuposa: Jun-02-2023