Self-Compacting Concrete (SCC) tekinoroji yemazuva ano yekongiri inoyerera pasi pehuremu hwayo kuzadza fomu pasina kudiwa kwemechani vibration. Mabhenefiti ayo anosanganisira kuvandudzwa kwekushanda, kuderedzwa kwemitengo yevashandi, uye kukwidziridzwa kwemaitiro. Kuwana hunhu uhu hunoda kunyatso kudzora musanganiswa, kazhinji nerubatsiro rwemisanganiswa seHydroxypropyl Methylcellulose (HPMC). Iyi cellulose ether polymer inoita basa rakakosha mukugadzirisa rheological zvimiro zveSCC, kuvandudza kugadzikana kwayo uye kuyerera maitiro.
Zvivakwa uye Mabasa eHPMC
Hydroxypropyl Methylcellulose (HPMC) isiri-ionic, mvura-inonyungudika polima inotorwa kubva muselulosi. Zvinhu zvayo zvakakosha zvinosanganisira:
Viscosity Modification: HPMC inowedzera viscosity yeaqueous mhinduro, inosimudzira iyo thixotropic hunhu hwekongiri musanganiswa.
Kuchengetedzwa Kwemvura: Iine yakanakisa kuchengetedza mvura, iyo inobatsira kuchengetedza kushanda kwekongiri nekudzikisa mvura kubuda.
Adhesion uye Cohesion: HPMC inovandudza chisungo pakati pezvikamu zvakasiyana mukongiri, ichiwedzera hukama hwayo.
Kugadzikana Kuwedzera: Inogadzirisa kumiswa kwezvikwata mumusanganiswa, kuderedza kupatsanurwa uye kubuda ropa.
Zvivakwa izvi zvinoita kuti HPMC ive yekuwedzera yakakosha muSCC, sezvo ichigadzirisa zvinonetsa zvakajairika sekusarura, kubuda ropa, uye kuchengetedza kuyerera kunodiwa pasina kukanganisa kugadzikana.
Basa reHPMC muSelf-Compacting Concrete
1. Kuvandudzwa Kwekushanda
Basa rekutanga reHPMC muSCC nderekusimudzira kushanda kwayo nekuwedzera musanganiswa's viscosity. Uku kugadziridzwa kunobvumira SCC kuyerera zviri nyore pasi pehuremu hwayo, ichizadza yakaoma fomu uye kuwana yakakwira dhigirii yekumisikidza pasina kudiwa kwekuzunguza. HPMC inova nechokwadi chekuti kongiri inoramba ichishanda kwenguva yakareba, iyo inonyanya kubatsira kune yakakura kana yakaoma kudira.
Kuyerera: HPMC inobatsira kune musanganiswa's thixotropic zvivakwa, zvichiita kuti irambe iri mvura kana yakasanganiswa asi yakakora payakamira. Iyi hunhu inotsigira SCC yekuzvimisikidza hunhu, ichiona kuti inoyerera zvakanaka kuzadza mold uye encapsulate yekusimbisa mabara pasina kupatsanura.
Consistency: Nekudzora viscosity, HPMC inobatsira kuchengetedza yunifomu mukusanganiswa mukati memusanganiswa, kuve nechokwadi chekuti batch imwe neimwe yeSCC inoratidza kuita kwakafanana maererano nekuyerera uye kugadzikana.
2. Kuparadzanisa uye Kudzora Kubuda Kweropa
Kuparadzaniswa (kupatsanurwa kwezvibatanidzwa kubva kune simenti paste) uye kubuda ropa (mvura inokwira kumusoro) zvinonetsa zvakanyanya muSCC. Izvi zviitiko zvinogona kukanganisa kutendeseka kwechimiro uye kupera kwepamusoro kwekongiri.
Homogeneous Mix: Kugona kweHPMC kuwedzera viscosity yesimende paste kunoderedza kufamba kwemvura uye akaunganidza, nekudaro kuderedza njodzi yekuparadzaniswa.
Kuderera Kubuda Kweropa: Nekuchengetedza mvura mukati memusanganiswa, HPMC inobatsira kudzivirira kubuda ropa. Uku kuchengetwa kwemvura kunovimbisawo kuti hydration process inoenderera mberi zvakanaka, kuvandudza kusimudzira kwesimba uye kusimba kwekongiri.
3. Kuwedzera Kugadzikana
HPMC inobatsira kugadzikana kweSCC nekuvandudza kuwirirana pakati pezvikamu mumusanganiswa. Uku kugadzikana kwakasimudzirwa kwakakosha mukuchengetedza kugovaniswa kwakafanana kweaggregates uye kudzivirira kuumbwa kwevoids kana nzvimbo dzisina simba.
Kubatana: Chimiro chekunamatira cheHPMC chinokurudzira hukama huri nani pakati pesimenti particles uye aggregates, zvichiita musanganiswa wakabatana unopikisa kusarura.
Kudzikamisa: HPMC inodzikamisa iyo microstructure yekongiri, ichibvumira kunyange kugoverwa kweaggregates uye kudzivirira kuumbwa kwelaitance (isina simba resimende uye zvidimbu zvakanaka pamusoro).
Mhedzisiro paMechanical Properties
1. Kudzvinyirira Simba
Kufurira kweHPMC pasimba rekumanikidza reSCC kazhinji kwakanaka. Nekudzivirira kupatsanurwa uye kuve nechokwadi chekusanganiswa kwehomogeneous, HPMC inobatsira kuchengetedza kutendeseka kwekongiri's microstructure, zvichitungamira kune nani simba hunhu.
Hydration: Kuwedzerwa kuchengetwa kwemvura kunovimbisa kuwanda kwakazara hydration yemasimende zvimedu, zvichibatsira mukuvandudzwa kwematrix yakasimba.
Uniform Density: Kudzivirirwa kwekuparadzaniswa kunoguma mukugovera kwakafanana kweaggregates, iyo inotsigira yakakwirira yekumanikidza simba uye inoderedza njodzi yezvisina simba.
2. Kugara kwenguva refu
Iko kushandiswa kweHPMC muSCC kunowedzera kusimba kwayo nekuita denser uye yakawanda homogenous microstructure.
Yakaderedzwa Permeability: Kuvandudzwa kwekubatana uye kuderera kweropa kunoderedza kupinza kwekongiri, ichiwedzera kuramba kwayo kune zvakatipoteredza zvinhu sechando-inonyunguduka, kurwisa kwemakemikari, uye carbonation.
Enhanced Surface Pedzisa: Kudzivirirwa kwekubuda ropa uye kupatsanurwa kunovimbisa kutsetseka uye kusimba kwepamusoro pekupedzisira, iyo isinganyanye kutsemuka uye kuyera.
Mashandisiro uye Dosage kufunga
Kushanda kweHPMC muSCC kunoenderana nehuwandu hwayo uye izvo zvinodikanwa zvemusanganiswa. Yakajairika dosage mareti anotangira pa0.1% kusvika 0.5% yehuremu hwesimende, zvichienderana neinodiwa zvivakwa uye hunhu hwezvimwe zvikamu mumusanganiswa.
Musanganiswa Dhizaini: Kungwarira musanganiswa dhizaini kwakakosha kukwirisa mabhenefiti eHPMC. Zvinhu zvakaita seaggregate type, simende zvemukati, uye zvimwe zvinosanganiswa zvinofanirwa kutariswa kuti uwane chiyero chinodiwa chekushanda, kugadzikana, uye simba.
Kugarisana: HPMC inofanirwa kuenderana nezvimwe zvinosanganiswa zvinoshandiswa mumusanganiswa, senge superplasticizers uye zvinoderedza mvura, kudzivirira kusangana kwakashata kunogona kukanganisa kushanda kweSCC.
Hydroxypropyl Methylcellulose (HPMC) inoita basa rakakosha mukusimudzira mashandiro eSelf-Compacting Concrete (SCC). Kugona kwayo kugadzirisa viscosity, kuvandudza kuchengetwa kwemvura, uye kudzikamisa musanganiswa unogadzirisa matambudziko akakosha mukugadzirwa kweSCC, kusanganisira kupatsanura, kubuda ropa, uye kuchengetedza kuyerera. Kubatanidzwa kweHPMC muSCC kunoguma nemusanganiswa unoshanda, wakatsiga, uye unogara kwenguva refu kongiri, zvichiita kuti ive yekuwedzera yakakosha kune yemazuva ano kongiri yekushandisa. Chiyero chakakodzera uye dhizaini yemusanganiswa yakakosha kushandisa mabhenefiti akazara eHPMC, kuve nechokwadi chekuti SCC inosangana nemaitiro chaiwo ekuita anodiwa kumapurojekiti akasiyana ekuvaka.
Nguva yekutumira: Jun-18-2024