Mhedzisiro ye cellulose ether papurasitiki isina shrinkage yedhaka

Mhedzisiro ye cellulose ether papurasitiki isina shrinkage yedhaka

Iyo isina-inobata laser displacement sensor yakashandiswa kuramba ichiyedza epurasitiki yemahara shrinkage yeHPMC yakagadziridzwa simende dhaka pasi pemamiriro ekukurumidza, uye chiyero chekurasikirwa kwemvura chakaonekwa panguva imwe chete. HPMC zvemukati uye epurasitiki yemahara shrinkage uye yekurasikirwa kwemvura mwero wekudzoreredza mhando dzakasimbiswa zvakateerana. Mhedzisiro yacho inoratidza kuti epurasitiki yemahara shrinkage yesamende dhaka inodzikira mutsetse nekuwedzera kweiyo HPMC, uye epurasitiki shrinkage yemahara simende dhaka inogona kuderedzwa ne30% -50% nekuwedzera kwe0.1% -0.4% (chikamu chezhinji) HPMC. Nekuwedzera kweHPMC yemukati, mwero wekurasikirwa kwemvura wesamende dhaka zvakare unodzikira. Kurasikirwa kwemvura kwedhaka resimende kunogona kuderedzwa ne9% ~ 29% nekuwedzera kwe0.1% ~ 0.4% HPMC. Zvirimo zveHPMC zvine hukama hwakajeka hwemutsara nemahara shrinkage uye chiyero chekurasikirwa kwemvura kwedhaka. HPMC inoderedza kuputika kwepurasitiki yedhaka resimende nekuda kwekuchengetedza kwayo mvura kwakanaka.

Mazwi akakosha:methyl hydroxypropyl cellulose ether (HPMC); Mortar; Plastiki yakasununguka shrinkage; Kurasikirwa kwemvura; Regression model

Kana ichienzaniswa nekongiri yesamende, dhaka resimende rinotsemuka nyore nyore. Pamusoro pezvinhu zvezvakagadzirwa pachazvo, shanduko yekunze tembiricha uye humidity ichaita simende dhaka nekukurumidza kurasikirwa kwemvura, zvichikonzera kukurumidza kuputika. Kugadzirisa dambudziko rekutsemuka kwesamende, rinowanzogadziriswa nekusimbisa kurapa kwekutanga, uchishandisa agent yekuwedzera uye kuwedzera fiber.

Semusanganiswa wepolymer unowanzo shandiswa mukutengesa simende dhaka, cellulose ether inotorwa neselulosi inowanikwa nekuita kwechirimwa cellulose uye caustic soda. Zhan Zhenfeng et al. yakaratidza kuti kana zvinyorwa zve cellulose ether (chikamu chemazana) chaive 0% ~ 0.4%, chiyero chekuchengetedza mvura chesimende dhaka chaiva nehukama hwakanaka hwemutsara nezviri mu cellulose ether, uye iyo yakakwirira ye cellulose ether, iyo yakakura chiyero chekuchengetedza mvura. Methyl hydroxypropyl cellulose ether (HPMC) inoshandiswa mudhaka resimende kuti ivandudze kubatana kwayo uye kubatana kwayo nekuda kwekubatana kwayo, kugadzikana kwekumiswa uye kuchengetedza mvura.

Iri bepa rinotora epurasitiki yemahara shrinkage yesamende dhaka sechinhu chekuyedza, inodzidza mhedzisiro yeHPMC pane epurasitiki yemahara shrinkage yesamende dhaka, uye inoongorora chikonzero nei HPMC ichidzikisa epurasitiki yemahara shrinkage yesamende dhaka.

1. Raw zvinhu uye nzira dzekuyedza

1.1 Raw Materials

Simende yakashandiswa mukuyedza yaive conch brand 42.5R yakajairwa Portland simende inogadzirwa neAnhui Conch Cement Co., LTD. Nzvimbo yayo chaiyo yaive 398.1 m² / kg, 80μm sieve residue yaive 0.2% (chikamu chechikamu); HPMC inopihwa neShanghai Shangnan Trading Co., LTD. Viscosity yaro i40 000 mPa·s, jecha ijecha reyero riripakati nepakati, fineness modulus i 2.59, uye saizi yepamusoro inosvika 5mm.

1.2 Nzira dzekuedza

1.2.1 Plastiki yemahara shrinkage yekuyedza nzira

Iyo yepurasitiki yemahara shrinkage yesamende dhaka yakaedzwa neyakaedzwa mudziyo inotsanangurwa mumabhuku. Chiyero chesimende kune jecha rebhenji dhaka i1: 2 (reshiyo yehuwandu), uye reshiyo yemvura kune simende i0.5(mass ratio). Eresa zvinhu zvakasvibirira maererano nehuwandu hwekusanganiswa, uye panguva imwe chete uwedzere kuhari yekuvhenganisa yakaoma inokurudzira 1min, wobva wawedzera mvura uye ramba uchikurudzira 2min. Wedzera nezve 20g yemugadziri (shuga chena granulated), sanganisa zvakanaka, dururira dhaka resimende kunze kubva pakati pehuni mold mune inotenderera chimiro, ita kuti ivhare iyo yepasi yehuni mold, inotsvedzerera ne spatula, uye wozoshandisa inoraswa. epurasitiki firimu kuti riwaridzire pamusoro pevhu simende dhaka, uye ipapo kudira bvunzo dhaka pamusoro epurasitiki tafura jira nenzira yakafanana kuzadza yokumusoro huni chakuvhe. Uye nekukasira nehurefu hwekunyorova kwealuminiyumu ndiro yakareba kupfuura hupamhi hwehuni mold, kurumidza kukwenya parutivi rwakareba rwehuni.

Microtrak II LTC-025-04 laser displacement sensor yakashandiswa kuyera epurasitiki yemahara shrinkage ye simende mortar slab. Matanho acho ndeaya anotevera: Zvinangwa zviviri zvekuedzwa (mapureti madiki efuro) akaiswa pakati penzvimbo yedhaka resimende yakadirwa, uye chinhambwe chiri pakati pezvinangwa zviviri zvebvunzo chaive 300mm. Zvadaro, simbi yakagadzirwa nelaser displacement sensor yakaiswa pamusoro pemuenzaniso, uye kuverenga kwekutanga pakati pelaser uye chinhu chakayerwa chakagadziriswa kuti ive mukati mechiyero che 0. Pakupedzisira, mwenje we 1000W iodine tungsten inenge 1.0m pamusoro pehuni mold uye feni yemagetsi inenge 0.75m pamusoro pehuni mold (mhepo inomhanya 5m / s) yakabatidzwa panguva imwe chete. Iyo yepurasitiki yemahara shrinkage bvunzo yakaenderera kusvika iyo specimen yanyura kuti inyatsogadzikana. Munguva yekuedzwa kwese, tembiricha yaive (20±3)℃ uye hunyoro hwehukama hwaive (60±5)%.

1.2.2 Nzira yekuedza yehuwandu hwekubuda kwemvura

Tichifunga nezve pesvedzero yekuumbwa kwesimende-yakavakirwa zvinhu pachiyero chekubuda kwemvura, zvinyorwa zvinoshandisa zvienzaniso zvidiki kuenzanisa mwero wekubuda kwemvura yezviyero zvakakura, uye hukama pakati pereshiyo Y yehuwandu hwekuputsika kwemvura yedhaka hombe simende. uye diki-ndiro simende dhaka uye nguva t(h) iri sezvinotevera: y= 0.0002 t+0.736

2. Migumisiro uye nhaurirano

2.1 Pesvedzero yezvemukati meHPMC pamapurasitiki emahara shrinkage yesamende dhaka

Kubva pakuita kweHPMC yemukati papurasitiki yemahara shrinkage yesamende dhaka, zvinogona kuoneka kuti epurasitiki yemahara shrinkage yeyakajairwa simende dhaka inowanzoitika mukati me4h yekukasira kuputika, uye yayo yepurasitiki yemahara shrinkage inowedzera mumutsara nekuwedzera kwenguva. Mushure me4h, iyo yepurasitiki yemahara shrinkage inosvika 3.48mm, uye curve inova yakagadzikana. Iwo epurasitiki emahara shrinkage curves eHPMC simende dhaka ese ari pazasi pepurasitiki yemahara shrinkage curves yeyakajairwa simende dhaka, zvichiratidza kuti epurasitiki yemahara shrinkage curves yeHPMC simende dhaka ese madiki pane ayo ejasi semende dhaka. Nekuwedzera kweHPMC zvemukati, iyo epurasitiki yemahara shrinkage yesamende dhaka zvishoma nezvishoma inoderera. Kuenzaniswa nedhaka resimende rakajairwa, kuputika kwepurasitiki kwemahara kweHPMC simende yakasanganiswa ne0.1% ~ 0.2% (chikamu chemasendi) inoderera ne30%, ingangoita 2.45mm, uye kuputika kwepurasitiki pasina 0.3% HPMC simende dhaka inoderera neanosvika makumi mana. %. Inenge 2.10mm, uye epurasitiki yemahara shrinkage ye0.4% HPMC simende dhaka inodzikira ne50%, ingangoita 1.82mm. Naizvozvo, munguva imwe cheteyo yekukurumidza kupaza, iyo yepurasitiki yemahara shrinkage yeHPMC simende dhaka yakadzikira pane iyo yakajairwa simende dhaka, zvichiratidza kuti kuisirwa kweHPMC kunogona kuderedza epurasitiki yemahara shrinkage yesamende dhaka.

Kubva pane mhedzisiro yeHPMC yemukati pane epurasitiki yemahara shrinkage yesamende dhaka, zvinogona kuoneka kuti nekuwedzera kweHPMC yemukati, epurasitiki yemahara shrinkage yesamende dhaka zvishoma nezvishoma inoderera. Hukama huri pakati pepurasitiki yemahara shrinkage (s) yesamende dhaka uye HPMC yemukati (w) inogona kuiswa neinotevera formula: S= 2.77-2.66 w

HPMC zvemukati uye simende dhaka plastiki yemahara shrinkage mutsara regression musiyano wekuongorora mhinduro, uko: F ndiyo nhamba; Sig. Inomiririra iyo chaiyo kukosha kwenhanho.

Mhedzisiro yacho inoratidza kuti corelation coefficient yeiyi equation i0.93.

2.2 Kupesvedzera kwehuwandu hweHPMC pachiyero chekurasika kwemvura yedhaka resimende

Pasi pemamiriro ekukurumidza, inogona kuoneka kubva mukushandurwa kwehuwandu hwekurasikirwa kwemvura yesamende dhaka nezviri mukati meHPMC, mwero wekurasikirwa kwemvura wesamende dhaka pamusoro zvishoma nezvishoma unodzikira nekuwedzera kweHPMC zvemukati, uye zvinopa kuderera kwemutsara. Kuenzaniswa nehuwandu hwekurasikirwa kwemvura kweyakajairika simende dhaka, apo iyo HPMC yemukati iri 0.1%, 0.2%, 0.3%, 0.4%, zvichiteerana, Kurasikirwa kwemvura kwemvura hombe simende dhaka kwakadzikira ne9.0%, 12.7%, 22.3% uye 29.4% zvichiteerana. Iko kubatanidzwa kweHPMC kunoderedza kuwanda kwekurasikirwa kwemvura kwesamende dhaka uye kunoita kuti mvura yakawanda itore chikamu mukunyorovesa kwesamende dhaka, nekudaro kuumba simba rakakwana rekusimba kuramba njodzi yekutsemuka inounzwa nenharaunda yekunze.

Hukama huri pakati pesimende dhaka kurasikirwa kwemvura mwero (d) uye HPMC yemukati (w) inogona kuiswa neinotevera formula: d= 0.17-0.1w

Iyo mutsara regression musiyano wekuongorora mhedzisiro yeHPMC yemukati uye simende dhaka kurasikirwa kwemvura chiyero chinoratidza kuti coefficient yekubatanidza yeiyi equation ndeye 0.91, uye kuwirirana kuri pachena.

3. Mhedziso

Iyo yepurasitiki yemahara shrinkage yesamende dhaka inoderera zvishoma nezvishoma nekuwedzera kwezviri mukati meHPMC. Iyo yepurasitiki yemahara shrinkage yesamende dhaka ine 0.1% ~ 0.4% HPMC inoderera ne30% ~ 50%. Huwandu hwekurasika kwemvura hwesimende dhaka hunodzikira nekuwedzera kweHPMC yemukati. Kurasikirwa nemvura kwedhaka resimende ne 0.1% ~ 0.4% HPMC inoderera ne9.0% ~ 29.4%. Iyo yepurasitiki yemahara shrinkage uye chiyero chekurasikirwa kwemvura chesimende dhaka zvine mutsetse nezvirimo zveHPMC.