Iko Kuvandudza Mhedzisiro yeHydroxypropyl Methylcellulose paSimende-Yakavakirwa Zvishandiso11.3

The Improvement Effect ofHydroxypropyl methylcellulosepaCement-Based Materials

Cement-based zvinhu, sedhaka nekongiri, zvinoshandiswa zvakanyanya muindasitiri yekuvaka. Zvinhu izvi zvinopa kusimba kwechimiro uye kusimba kune zvivakwa, mabhiriji, uye zvimwe zvivakwa. Nekudaro, matambudziko akasiyana aripo mukushandisa kwavo, anosanganisira kutsemuka, shrinkage, uye kusashanda zvakanaka. Kugadzirisa nyaya idzi, vaongorori vanga vachiferefeta kushandiswa kwezvimwe zvekuwedzera sengehydroxypropyl methylcellulose (HPMC). Muchinyorwa chino, isu tichaongorora kuvandudza maitiro eHPMC pane simende-yakavakirwa zvinhu.

Hydroxypropyl methylcellulose (HPMC) is cellulose-based polymer iyo inowanzoshandiswa seyakakora, binder, uye firimu-kugadzira agent mumaindasitiri akasiyana. Muindasitiri yekuvaka, HPMC inonyanya kushandiswa semusanganiswa wesimende kusimudzira kushanda kwesimende-yakavakirwa zvinhu. Iyo inozivikanwa kune yayo yakasarudzika midziyo inogona kuvandudza huwandu hwese uye kusimba kwezvinhu izvi.

Imwe yemabhenefiti akakosha eHPMC kugona kwayo kusimudzira kushanda kwesimende-yakavakirwa zvinhu. HPMC inoshanda sechinhu chinochengetedza mvura, zvinoreva kuti inogona kuderedza zvakanyanya kuvharwa kwemvura kubva mumusanganiswa. Izvi zvinotungamira kune yakawedzerwa nguva yekumisikidza uye yakagadziridzwa kushanda, zvichibvumira kushandiswa kuri nyore uye kupedzisa zviri nani kwezvinyorwa. Pamusoro pezvo, HPMC inobatsira kudzikisira njodzi yekutsemuka uye shrinkage, sezvo ichipa yakawanda yunifomu hydration maitiro.

Uyezve, HPMC inogona kuvandudza simba rekubatanidza pakati pemasimende uye mamwe aggregates. Kuwedzerwa kweHPMC kune simende-yakavakirwa zvinhu inogadzira matatu-dimensional network chimiro, iyo inosimudzira inonamatira zvivakwa. Izvi zvinoguma nekuwedzera kusimba uye flexural simba, pamwe nekuvandudza kusimba maererano nekupikisa kurwiswa kwemakemikari uye mamiriro ekunze.

Kushandiswa kweHPMC kunobatsirawo mukudzikiswa kwekushandiswa kwemvura muzvinhu zvine simende. Sezvambotaurwa, HPMC inoshanda sechinhu chinochengeta mvura, ichibvumira chiyero chinononoka chekubuda. Izvi zvinoreva kuti mvura shoma inodiwa panguva yekusanganiswa, zvichiita kuti pave nechiyero chemvura-kusvika-samende. Mvura yakaderedzwa haingogadziri simba uye kusimba kwechigadzirwa chekupedzisira asiwo inoderedza iyo yakazara kabhoni tsoka yeindasitiri yekuvaka.

Pamusoro pekushanda kwayo uye hukama hwekuvandudza mhedzisiro, HPMC inogona zvakare kuita senge viscosity modifier. Nekugadzirisa chiyero cheHPMC mune simende-yakavakirwa zvinhu, viscosity yemusanganiswa inogona kudzorwa. Izvi zvinonyanya kubatsira kana uchibata nehunyanzvi maapplication, senge wega-leveling kana wega-compacting kongiri, uko kunoenderana kuyerera zvivakwa kwakakosha.

Kushandiswa kweHypromellose/HPMCinogona kukwidziridza kushorwa kwesimende-yakavakirwa zvinhu kune zvekunze zvinhu, semamiriro ekunze akaomarara kana kurwisa kwemakemikari. Iyo mitatu-dimensional network yakaumbwa neHPMC inoshanda sechivharo chekudzivirira, kudzivirira kupinda kwemvura, chloride ions, uye zvimwe zvinokuvadza. Izvi zvinovandudza hupenyu hurefu uye kushanda kwesimende-based materials, kuderedza kudiwa kwekugadzirisa kunodhura kana kutsiva mune ramangwana.

Kubudirira kweHPMC sechimwe chekuwedzera mune simende-yakavakirwa zvinhu zvinoenderana nezvakati wandei, kusanganisira mhando uye dosi yeHPMC, kuumbwa kwesamende musanganiswa, uye izvo chaizvo zvinodikanwa zvekushandisa. Naizvozvo, zvakakosha kuita tsvakiridzo yakakwana uye kuyedza kukwidziridza kushandiswa kweHPMC munzvimbo dzakasiyana dzekuvaka.

Kuwedzerwa kwehydroxypropyl methylcellulose (HPMC) kune simende-yakavakirwa zvinhu zvinopa akawanda mabhenefiti anovandudza kunaka kwavo kwese uye kusimba.HPMCinowedzera kushanda, simba rekubatanidza, uye kuramba kune zvinhu zvekunze zvakadai sekuputika, shrinkage, uye kurwisa kwemakemikari. Uyezve, HPMC inobvumira kudzikiswa kwemukati memvura, zvichitungamira kune yakaderera kabhoni tsoka uye nekusimudzira kusimudzira. Kuti utore zvizere pane zvakanakira HPMC, kumwe kutsvagisa uye kusimudzira kunodiwa kuti uone iyo yakakwana dosage uye nzira dzekushandisa kune akasiyana ekuvaka mamiriro.