Cellulose ether chinhu chakajairika mukuwedzera mune zvekuvaka, chinoshandiswa kusimudzira mashandiro ekuvaka uye mechanic zvimiro zvedhaka. Fineness ndechimwe chezvinhu zvakakosha zve cellulose ether, iyo inoreva kugovera kwayo saizi yechikamu.
Hunhu uye kushandiswa kwe cellulose ether
Cellulose ether inonyanya kusanganisira hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), nezvimwewo. Basa ravo guru mukuvaka dhaka rinosanganisira:
Kuchengetedzwa kwemvura: nekudzikisa kubuda kwemvura, kuwedzera simende hydration nguva, uye kuwedzera simba redhaka.
Kukora: Wedzera viscosity yedhaka uye kunatsiridza mashandiro ekuvaka.
Vandudza crack resistance: Iyo yekuchengeta mvura midziyo ye cellulose ether inobatsira kudzora kupera kwe simenti, nekudaro kuderedza kuitika kwekutsemuka mudhaka.
Iko kunaka kwe cellulose ether kunokanganisa dispersibility yayo, kunyungudika uye kugona mudhaka, nekudaro kukanganisa kushanda kwese kwedhaka.
Mhedzisiro ye cellulose ether fineness pane simba redhaka inogona kuongororwa kubva pane zvinotevera zvinhu:
1. Kuparara kwehuwandu uye dispersibility
Mwero wekunyungudika we cellulose ether mumvura unoenderana nekunaka kwayo. Cellulose ether zvimedu zvine hunyoro hwepamusoro zvinonyungudika zviri nyore mumvura, nekudaro nekukurumidza kugadzira kupararira kwakafanana. Uku kugovera yunifomu kunogona kuvimbisa kugadzikana kwemvura kuchengetwa uye kukora mune yese dhaka system, kukurudzira kufambira mberi kweyunifomu ye simenti hydration reaction, uye kuvandudza simba rekutanga redhaka.
2. Mvura yekuchengetedza simba
Iko kunaka kwe cellulose ether kunokanganisa kushanda kwayo kwekuchengetedza mvura. Cellulose ether particles ine hunyoro hwepamusoro inopa yakakura chaiyo nzvimbo yepasi, nokudaro ichigadzira yakawanda-inochengetedza mvura zvimiro zvemicroporous mudhaka. Aya ma micropores anogona kunyatso kuchengetedza mvura, kurebesa simende hydration reaction nguva, kukurudzira kuumbwa kwezvigadzirwa zve hydration, uye nekudaro kuwedzera simba redhaka.
3. Interface kubatana
Nekuda kwekunaka kwadzo, cellulose ether zvimedu zvine kutsetseka kwepamusoro zvinogona kuumba imwe yunifomu yekubatanidza dhizaini pakati pedhaka uye aggregate, uye inonatsiridza iyo interface kubatana kwedhaka. Izvi zvinobatsira dhaka kuchengetedza plastiki yakanaka munhanho yekutanga, kuderedza kuitika kwekuputsika kwe shrinkage, uye nekudaro kuvandudza simba rose.
4. Kusimudzira simende hydration
Munguva ye simenti hydration process, kuumbwa kwe hydration zvigadzirwa zvinoda imwe huwandu hwemvura. Cellulose ether ine hunyoro hwepamusoro inogona kuumba mamwe mayunifomu e hydration mamiriro mudhaka, kudzivirira dambudziko rekusakwana kana kunyanyisa unyoro hwenzvimbo, kuve nechokwadi chekufambira mberi kwakazara kwe hydration reaction, uye nekudaro kuvandudza simba redhaka.
Chidzidzo chekuedza uye kuongororwa kwemhedzisiro
Kuti uone kushanda kwe cellulose ether fineness pane simba redhaka, zvimwe zvidzidzo zvekuyedza zvakagadzirisa kunaka kwe cellulose ether uye kuyedza ma mechanics ayo edhaka pasi pezviyero zvakasiyana.
Kuedza kugadzira
Kuedza kunowanzo shandisa cellulose ether samples dzezvakanaka zvakasiyana uye zvinovawedzera kune simende dhaka zvakateerana. Nokudzora zvimwe zvakasiyana-siyana (zvakadai seyero yemvura-samende, aggregate ratio, nguva yekusanganiswa, nezvimwewo), chete kunaka kwe cellulose ether kunoshandurwa. Rwendo rwekuedzwa kwesimba, kusanganisira kumanikidza simba uye kuchinjika simba, rinobva raitwa.
Mibairo yekuedza inowanzo ratidza:
Cellulose ether samples nehupamhi hwepamusoro inogona kuvandudza zvakanyanya simba rekumanikidza uye flexural simba redhaka padanho rekutanga (semazuva matatu nemazuva manomwe).
Nekuwedzera kwenguva yekurapa (semazuva makumi maviri nemasere), cellulose ether ine hunyoro hwepamusoro inogona kuramba ichipa kuchengetwa kwemvura kwakanaka uye kubatana, kuratidza kukura kwesimba kwakagadzikana.
Semuyenzaniso, mukuyedza, simba rekumanikidza rema cellulose ether ane fineness ye80 mesh, 100 mesh, uye 120 mesh mumazuva makumi maviri nemasere aive 25 MPa, 28 MPa, uye 30 MPa zvichiteerana. Izvi zvinoratidza kuti kukwirisa kunaka kweselulosi ether, ndiko kukura kwesimba rekumanikidza redhaka.
Kushanda kushandisa cellulose ether fineness optimization
1. Rongedza maererano nemamiriro ekuvaka
Kana uchivaka munzvimbo yakaoma kana pasi pekushisa kwakanyanya, cellulose ether ine hunyoro hwepamusoro inogona kusarudzwa kuti iwedzere kuchengetwa kwemvura yedhaka uye kuderedza kurasikirwa kwesimba kunokonzerwa nekubuda kwemvura.
2. Shandisa nezvimwe zvinowedzera
Cellulose ether ine hunyoro hwepamusoro inogona kushandiswa pamwe chete nezvimwe zvinowedzera (zvakadai sezvinoderedza mvura uye mhepo inopinza maajenti) kuti ienderere mberi nekugonesa kushanda kwedhaka. Semuenzaniso, kushandiswa kwemvura inoderedza mvura kunogona kuderedza mvura-simende reshiyo uye kuwedzera kuwanda kwedhaka, nepo cellulose ether inopa kuchengetedza kwemvura uye kusimbisa mhedzisiro. Iko kusanganiswa kwezviviri kunogona kuvandudza zvakanyanya simba redhaka.
3. Kugadziridzwa kwemaitiro ekuvaka
Munguva yekuvaka, zvinodikanwa kuve nechokwadi chekuti cellulose ether yakanyungudika uye yakapararira. Izvi zvinogona kuwanikwa nekuwedzera nguva yekusanganisa kana kushandisa midziyo yakakodzera yekusanganisa kuti uve nechokwadi chekuti kunaka kweiyo cellulose ether kunoshandiswa zvizere.
Iko kunaka kwe cellulose ether kune zvakakosha pakusimba kwedhaka. Cellulose ether ine hunyoro hwepamusoro inogona kutamba zvirinani basa rekuchengetedza mvura, kukora uye kuvandudza chisungo chekubatanidza, uye kuvandudza simba rekutanga uye kwenguva refu mekiniki zvimiro zvedhaka. Mumashandisirwo anoshanda, kunaka kwe cellulose ether kunofanirwa kusarudzwa zvine musoro uye kushandiswa zvinoenderana nemamiriro ekuvaka chaiwo uye zvinodiwa kuti uwedzere kuita kwedhaka uye kuvandudza kunaka kweprojekiti.
Nguva yekutumira: Jun-24-2024