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. Phantsi kweemeko ezifanayo, okukhona i-viscosity ye-cellulose ether iphezulu, ingcono i-viscosity yezinto eziguquliweyo zesamente, kodwa ukuba i-viscosity iphezulu kakhulu, iya kuchaphazela umbane kunye nokusebenza kwezinto (ezifana nokuncamathelisa 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, 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 "ibhola", enokuphucula ukusebenza kwezinto ezixutywe ngokutsha, ezifana nokwandisa iplastiki kunye nokuguquguquka kodaka ngexesha lokusebenza, olulungele 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
I-ether ye-cellulose iya kwandisa ixesha lokucwangcisa i-samente intlama okanye udaka, kwaye ilibazise i-hydration kinetics yesamente, enenzuzo ekuphuculeni ixesha lokusebenza kwezinto ezixutywe ngokutsha, ukuphucula ukuhambelana kodaka kunye nokulahlekelwa kwe-concrete slump ngokuhamba kwexesha, kodwa kwakhona kubangele ukulibaziseka kwenkqubela phambili yolwakhiwo.
Ixesha lokuposa: Jun-02-2023