Cellulose ethers pamadziro putty

Cellulose ether (hydroxypropyl methylcellulose, HPMC kwenguva pfupi) yakajairika musanganiswa wekuvaka mukati memadziro putty uye inoita basa rakakosha mu putty. HPMC ine viscosities yakasiyana ine simba guru pakuita kweputty. Iri bepa rinonyatsoongorora mhedzisiro uye mitemo yezvakasiyana viscosities yeHPMC uye dosi yayo pakuita kwe putty, uye inosarudza iyo optimum viscosity uye dosage yeHPMC mune putty.

Mazwi akakosha: cellulose ether, viscosity, putty, kuita

0.Nhanganyaya

Nekuvandudzwa kwevanhu, vanhu vanonyanya kuda kugara munzvimbo yakanaka yemukati. Mukuita kwekushongedza, nzvimbo huru dzemadziro dzinoda kukweshwa uye kuenzaniswa ne putty kuzadza makomba. Putty yakakosha zvikuru inotsigira yekushongedza zvinhu. Kurasika kwepasi putty kurapwa kunokonzeresa matambudziko akadai sekutsemuka uye kupeuka kwependi yekuputira. Kushandisa tsvina yemaindasitiri uye zvicherwa zvine porous zvine mhepo-yekuchenesa zvivakwa kudzidza chivakwa chitsva chekuchengetedza nharaunda putty yave nyaya inopisa. Hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, Chirungu chipfupiso chinonzi HPMC) imvura-inonyungudika polymer zvinhu p, seyakanyanya kushandiswa musanganiswa wekuvaka putty, ine yakanaka kuchengetedza mvura, inowedzera nguva yekushanda uye inovandudza mashandiro ekuvaka, Kuvandudza kushanda zvakanaka kwekushanda. . Zvichienderana neyakapfuura yekuyedza tsvagiridzo, pepa iri rakagadzira mhando yemukati madziro ekudzivirira kwezvakatipoteredza putty ine diatomite seyo huru inoshanda yekuzadza, uye yakarongeka yakadzidza mhedzisiro yeakasiyana viscosity HPMC uye huwandu hwe putty pamvura yeputty kuramba, simba rekubatanidza, kutanga. kuomesa mutswe kuramba, kugaya Kufurira workability, workability uye pamusoro yakaoma nguva.

1. Chikamu chekuedza

1.1 Edzai zvigadzirwa uye zviridzwa

1.1.1 Raw materials

Iye 4 W-HPMC, 10 W-HPMC, uye 20 W-HPMC cellulose ether uye polyvinyl alcohol rubber powder yakashandiswa mumuedzo yakapiwa neKima Chemical Co., Ltd; diatomite yakapihwa neJilin Diatomite Company; heavy calcium uye talcum powder Yakapiwa neShenyang SF Industrial Group; 32.5 R white Portland simende yakapihwa neYatai Cement Company.

1.1.2 Midziyo yekuyedza

Cement fluidity tester NLD-3; kutanga kuomesa anti-cracking tester BGD 597; akangwara chisungo simba tester HC-6000 C; kusanganisa uye jecha kuparadzira akawanda-chinangwa muchina BGD 750.

1.2 Nzira yekuedza

Iyo yakakosha formula yekuyedzwa, kureva, zvirimo simende, inorema calcium, diatomite, talcum poda uye polyvinyl doro ndeye 40%, 20%, 30%, 6% uye 4% yehuwandu hwehuwandu hweputty poda, zvichiteerana. . Iwo madosi eHPMC ane matatu akasiyana viscosities ari 1‰, 2‰, 3‰, 4‰uye 5‰zvichiteerana. Kuti zvive nyore kuenzanisa, hupamhi hwekuvakwa kweputty single-pass inodzorwa pa2 mm, uye dhigirii yekuwedzera inodzorwa pa170 mm kusvika 180 mm. Zviratidzo zvekuona ndezvekutanga kuomesa crack resistance, simba rebhondi, kuramba kwemvura, sanding property, workability uye pamusoro pekuoma nguva.

2. Miedzo mhinduro uye nhaurirano

2.1 Mhedzisiro yeakasiyana maviscosities eHPMC uye dosi yayo pane bond simba re putty.

Kubva pamhedzisiro yebvunzo uye bond simba macurves eakasiyana viscosities eHPMC uye zvirimo pane putty.'s bond simba, zvinogona kuonekwa kuti putty's bond simba rinowedzera kutanga rozodzikira nekuwedzera kweHPMC yemukati. Iyo bond simba re putty ine pesvedzero huru, iyo inowedzera kubva 0.39 MPa kana zvirimo zviri 1.‰kusvika ku0.48 MPa kana zvirimo zviri 3‰. Izvi zvinodaro nekuti kana HPMC yakaparadzirwa mumvura, iyo cellulose ether mumvura inoputika nekukurumidza uye inosanganiswa nehupfu yerabha, yakabatana neimwe, uye simende hydration chigadzirwa chakakomberedzwa neiyi firimu repolymer kuumba composite matrix chikamu, chinoita. iyo putty bond Simba rinowedzera, asi kana huwandu hweHPMC hwakanyanya kukura kana viscosity yakanyanya kana yakaderera, iyo polymer firimu inoumbwa pakati peHPMC uye simende masimende ine chisimbiso chekuita, iyo inoderedza kusimba kwechisungo cheputty.

2.2 Mhedzisiro yeakasiyana maviscosities eHPMC uye zvirimo panguva yakaoma yeputty

Iyo inogona kuvonekwa kubva muyedzo mhedzisiro yeakasiyana maviscosities eHPMC uye dosage pairi-kuomesa nguva yeputty uye pamusoro-kuomesa nguva curve. Iyo yakakura viscosity yeHPMC uye yakakura dosi, iyo yakareba nguva yekuomesa-yepamusoro peputty. /T298-2010), iyo nguva yakaoma yemukati madziro putty haingapfuure 120 min, uye kana zviri mukati 10 W.-HPMC inodarika 4‰, uye zvinyorwa zve20 W-HPMC inodarika 3‰, iyo nguva yakaoma yepasi ye putty inodarika izvo zvinodikanwa. Izvi zvinodaro nekuti HPMC ine yakanaka kuchengetedza mvura. Kana HPMC yakasanganiswa mune putty, mamorekuru emvura uye mapoka ehydrophilic ari pamolecular chimiro cheHPMC anogona kusangana pamwe chete kuunza mabhuru madiki. Aya mabubbles ane "roller" effect, iyo inobatsira kune putty batching Mushure mokunge putty yakaomeswa, mamwe mabhubhu emhepo achiripo kuti agadzire pores akazvimirira, izvo zvinodzivirira mvura kuti irege kubuda nokukurumidza uye inowedzera nguva yekuoma kwepamusoro peputty. Uye kana HPMC yasanganiswa muputty, zvigadzirwa zve hydration zvakaita se calcium hydroxide uye CSH gel mu simenti zvinoshongedzwa ne HPMC mamorekuru, ayo anowedzera viscosity ye pore solution, inoderedza kufamba kwemaion mupore solution, uye kunowedzera kunonoka. iyo simenti hydration process.

2.3 Mhedzisiro yeakasiyana maviscosities eHPMC uye dosage pane zvimwe zvivakwa zve putty.

Iyo inogona kuoneka kubva muyedzo mhedzisiro yekupesvedzera kwakasiyana viscosities yeHPMC uye huwandu hweiyo putty pane zvimwe zvivakwa zve putty. Kuwedzerwa kweHPMC ine maviscosities akasiyana kunoita kuti yekutanga kuomeswa kutsemuka kuramba, kushomeka kwemvura uye kuita sanding kweiyo putty zvese zvakajairika, asi nekuwedzera kwehuwandu hweHPMC, kusasimba kwekuvaka kuita. Nekuda kwekukora mhedzisiro yeHPMC, zvakawandisa zvemukati zvinowedzera kuenderana kweiyo putty, izvo zvichaita kuti zviome kukwenya iyo putty uye kukanganisa kushanda kwekuvaka.

3. Mhedziso

(1) Simba rakabatana re putty rinowedzera kutanga rozodzikira nekuwedzera kweHPMC yemukati, uye iyo yakabatana simba re putty inonyanya kukanganiswa kana zvirimo zve10 W-HPMC zviri 3.‰.

(2) Iyo yakakura viscosity yeHPMC uye zvakanyanya zviri mukati, iyo yakareba nguva yekuomesa pamusoro peiyo putty. Kana zvirimo zve10 W-HPMC zvinopfuura 4‰, uye zvirimo zve20 W-HPMC zvinopfuura 3‰, nguva yekuomeswa kwepamusoro yeputty yakarebesa uye haina kukwana. Zvinoda.

(3) Kuwedzera maviscosities akasiyana eHPMC anoita kuti yekutanga kuomeswa kutsemuka kuramba, kudzivirira kwemvura uye kuita sanding kweiyo putty yakajairika, asi nekuwedzera kwezvirimo, kuita kwekuvaka kunowedzera. Tichifunga zvizere, kuita kweiyo putty yakasanganiswa ne3‰10 W-HPMC ndiyo yakanyanya kunaka.