Muhari yakasanganiswa yakagadzirwa, yakareba zvishomaether ye cellulosezvinogona kuvandudza mashandiro edhaka rakanyorova zvakanyanya, zvinogona kuonekwa kuti cellulose ether chinhu chikuru chinokanganisa mashandiro edhaka pakuvaka.
Kusarudzwa kwemhando dzakasiyana, viscosities dzakasiyana, saizi dzakasiyana dzezvimedu, madhigirii akasiyana ekusimba uye kuwedzerwa kwe cellulose ethers zvinewo mhedzisiro yakasiyana pakuvandudza mashandiro e dry powder mortar. Parizvino, mastonery akawanda nemaplastering mortars haana kushanda zvakanaka kwekuchengetedza mvura, uye slurry yemvura inopatsanurwa mushure memaminitsi mashoma ekumira. Saka zvakakosha zvikuru kuwedzera cellulose ether mu cement mortar.
kuchengetwa kwemvura
Kuchengetwa kwemvura ibasa rakakosha remethyl cellulose ether, uye ibasa iro vagadziri vemadhaka emumba, kunyanya avo vari kumaodzanyemba, vanoteerera.
Mukugadzirwa kwezvinhu zvekuvaka, kunyanya dry powder mortar, cellulose ether ine basa risingatsiviwi, kunyanya mukugadzirwa kwespecial mortar (modified mortar), chinhu chakakosha uye chisingakoshi.
Kuwanda kwemvura, chiyero, tembiricha yemhepo uye chimiro chemamorekuru che cellulose ether zvine simba guru pakushanda kwayo kwekuchengetedza mvura. Mumamiriro akafanana, kukura kwe cellulose ether, ndiko kukura kwekuchengetedza mvura; chiyero chakakwira, ndiko kukura kwekuchengetedza mvura. Kazhinji, huwandu hushoma hwe cellulose ether hunogona kuvandudza zvakanyanya kuchengetedza mvura yemortar. Kana chiyero chasvika pane chimwe Kana chiyero chekuchengetedza mvura chikawedzera, mwero wekuchengetedza mvura unoderera; kana tembiricha yemhepo yakwira, kuchengetedza mvura kwe cellulose ether kunowanzo kudzikira, asi mamwe ma modified cellulose ethers anewo kuchengetedza mvura kuri nani mumamiriro ekupisa kwakanyanya; fibers dzine madhigirii akaderera ekuchinja Vegan ether ine kushanda kuri nani kwekuchengetedza mvura.
Boka rehydroxyl riri pamorekuru ye cellulose ether neatomu yeokisijeni riri pabond ye ether zvichabatana nemorekuru yemvura kuti zvigadzire hydrogen bond, zvichishandura mvura yakasununguka kuita mvura yakasungwa, nokudaro zvichiita basa rakanaka mukuchengetedza mvura; molekyuru yemvura ne cellulose ether molecular chain Interdiffusion inobvumira mamorekuru emvura kupinda mukati me cellulose ether macromolecular chain uye inosangana nemasimba akasimba ekubatanidza, nokudaro ichiumba mvura yakasununguka, mvura yakasungwa, uye inovandudza kuchengetedza mvura kwe cement slurry; cellulose ether inovandudza slurry ye cement itsva. Hunhu hwe rheological, chimiro che network ine porous uye osmotic pressure kana hunhu hwe cellulose ether hunokanganisa kupararira kwemvura.
kukora uye thixotropy
Cellulose etherInopa dhaka rakanyorova simba rakanaka, izvo zvinogona kuwedzera kugona kwekubatanidza pakati pedhaka rakanyorova nehwaro hwepasi, uye kuvandudza mashandiro edhaka rekudzivirira kudonha. Rinoshandiswa zvakanyanya mudhaka rekupurasita, dhaka rekubatanidza zvidhinha uye sisitimu yekudzivirira madziro ekunze. Kusimba kwe cellulose ether kunogonawo kuwedzera kugona kwekudzivirira kupararira uye homogeneity yezvinhu zvitsva zvakasanganiswa, kudzivirira kupatsanurwa kwezvinhu, kuparadzaniswa uye kubuda ropa, uye inogona kushandiswa mu faibha concrete, pasi pemvura concrete uye concrete inozvibatanidza.
Kusimba kwe cellulose ether pazvinhu zvakagadzirwa nesimende kunobva mukusimba kwe cellulose ether solution. Mumamiriro ezvinhu akafanana, kusimba kwe cellulose ether kwakakwira, kusimba kwechinhu chakagadziriswa che simende kunowedzera, asi kana kusimba kwakanyanya, zvinokanganisa kusimba uye kushanda kwechinhu ichi (sekunamira banga rekupurasita). Dura rinozvienzanisa uye kongiri inozvibatanidza, izvo zvinoda kusimba kwakanyanya, zvinoda kusimba kushoma kwe cellulose ether. Pamusoro pezvo, kusimba kwe cellulose ether kuchawedzera kudiwa kwemvura kwezvinhu zvakagadzirwa nesimende uye kuwedzera goho redu.
Mhinduro yemvura ye cellulose ether ine viscosity yakakura ine thixotropy yakawanda, iyo iriwo hunhu hukuru hwe cellulose ether. Mhinduro dzemvura dzemethyl cellulose dzinowanzova ne pseudoplastic uye non-thixotropic fluidity pasi petembiricha yayo yegel, asi dzinoratidza hunhu hweNewtonian flow pamazinga akaderera ekucheka. Pseudoplasticity inowedzera nehuremu hwemamorekuru kana huwandu hwe cellulose ether, zvisinei nerudzi rwe substituent uye mwero wekutsiva. Naizvozvo, cellulose ethers dze viscosity grade imwechete, zvisinei neMC, HPMC, HEMC, dzichagara dzichiratidza hunhu hwe rheological hwakafanana chero bedzi huwandu netembiricha zvichiramba zvakagadzikana. Ma gels echimiro anoumbwa kana tembiricha yakwidzwa, uye kuyerera kwe thixotropic kwakawanda kunoitika.
Ma ether e cellulose ane huwandu hwakanyanya uye hushoma hwe viscosity anoratidza thixotropy kunyangwe ari pasi pe tembiricha yegel. Hunhu uhwu hunobatsira zvikuru pakugadzirisa kuenzana uye kudzikira mukuvaka mortar yekuvaka. Zvinofanira kutsanangurwa pano kuti viscosity ye cellulose ether inowedzera, kuchengetedza mvura kuri nani, asi viscosity yakakwira, huremu hwemamorekuru e cellulose ether hwakakwira, uye kudzikira kwakafanana kwekunyungudika kwayo, izvo zvine mhedzisiro yakaipa pahuwandu hwemortar uye mashandiro ekuvaka.
Kudzidziswa nemhepo
Cellulose ether ine simba rinooneka rekuisa mhepo muzvinhu zvitsva zvakagadzirwa nesimende. Cellulose ether ine mapoka anofema (hydroxyl groups, ether groups) uye hydrophobic groups (methyl groups, glucose rings), uye i-surfactant ine basa repamusoro, nokudaro iine simba rekuisa mhepo mumhepo. Simba rekuisa mhepo mumhepo re cellulose ether richagadzira "bhora", iro rinogona kuvandudza mashandiro ezvinhu zvitsva zvakasanganiswa, zvakaita sekuwedzera plasticity uye kutsetseka kwemortar panguva yekushanda, izvo zvinobatsira kuti mortar ipararire; zvichawedzerawo kubuda kwemortar, kuderedza mutengo wekugadzira mortar; asi zvichawedzera porosity yezvinhu zvakaoma uye kuderedza hunhu hwazvo hwemakanika senge simba uye elastic modulus.
Sechinhu chinoita kuti zvinhu zvive sefactant, cellulose ether inewo simba rekunyorovesa kana kukwiza pazvimedu zvesimende, izvo zvinowedzera kuyerera kwezvinhu zvakagadzirwa nesimende pamwe chete nekushanda kwayo mumhepo, asi kukora kwayo kunoderedza kuyerera. Kubudirira kwekuyerera kusanganiswa kwekuita purasitiki uye kukora. Kazhinji, kana zviri mu cellulose ether zvakaderera, basa guru nderekuita purasitiki kana kuderedza mvura; kana zviri mukati zvakakwirira, kukora kwe cellulose ether kunowedzera nekukurumidza, uye kushanda kwayo mumhepo kunowanzo zara. Saka inoonekwa sekuita kwekukora kana kuwedzera kwekuda kwemvura.
kunonoka
Cellulose etherzvichawedzera nguva yekugadzika simende kana dhaka, uye zvinononotsa hydration yesimende, izvo zvinobatsira kuvandudza nguva yekushanda kwezvinhu zvitsva zvakasanganiswa, kuvandudza kugadzikana kwedhaka uye kurasikirwa nedhaka rekongiri nekufamba kwenguva, asi zvinogonawo kukonzera Kunonoka kuvaka.
Nguva yekutumira: Kubvumbi-25-2024