Basa rehupfu hwelatex hunonyungudika mudura
Parizvino, sezvo zvigadzirwa zvakasiyana-siyana zvemota yehupfu hwakaoma zvichigamuchirwa zvishoma nezvishoma uye zvichishandiswa zvakanyanya, vanhu vari muindasitiri iyi vanoteerera hupfu hwelatex hunonyungudika seimwe yezvinowedzerwa zvikuru zvemota yehupfu hwakaoma, saka zvinhu zvakasiyana-siyana zvakatanga kuonekwa zvishoma nezvishoma: hupfu hwelatex, upfu hwelatex hwakawanda-polymer, upfu hwelatex hweresin, upfu hwelatex hweresin hwakavakirwa mumvura nezvimwewo.
Hunhu hwe microscopic uye mashandiro macroscopic eupfu hwelatex hunonyungudikaMumortar zvinosanganiswa, uye mimwe mhedzisiro yedzidziso inoongororwa. Maitiro ekushanda kweupfu hwelatex hunonyungudika hunogona kushandiswa pakuomesa nekuwedzera zvimwe zvinhu zvakasiyana, wobva wawedzera colloid inodzivirira uye inorwisa kugadzika kuti iite chimiro chepolymer mushure mekuomesa nespray. Upfu hunoyerera hunogona kunyungudika mumvura. Upfu hwelatex hunonyungudika hunogoverwa mumortar yakaoma yakasanganiswa zvakaenzana. Mushure mekunge mortar yanyungudika nemvura, upfu hwepolymer hunonyungudika muslurry yakasanganiswa itsva uye inonyungudika zvakare; nekuda kwekunyorova kwesimende, kubuda kwemvura pamusoro uye kunyudzwa kwechigadziko, maburi ari mukati memortar haasunungurwi. Kushandiswa kwemvura nguva dzose uye nharaunda yakasimba yealkaline inopihwa nesimende kunoita kuti zvidimbu zvelatex zviome kuti zvigadzire firimu rinoenderera risinganyungudike mumvura mumortar. Iyi firimu rinoenderera mberi rinoumbwa nekusanganiswa kwezvikamu zvakapararira muemulsion kuita muviri wakafanana. Kuvapo kwemafirimu aya elatex akagoverwa mupolymer modral anogadziriswa kunoita kuti polymer modral iwane hunhu husingakwanise kuva nesimbi yakasimba yesimbi: nekuda kwemaitiro ekutambanudza yega elatex film, inogona kunamirwa pachigadziko kana pasi. Pakusangana kwesimbi yakagadziriswa yepolymer nepasi, izvi zvinogona kuvandudza mashandiro esimbi uye mabhesi akasiyana, sekunamatira kwezvigadziko zvakakosha senge mataira eceramic ane density yakakura uye mabhodhi epolystyrene; Izvi zvinogona kuita kuti simbi irambe yakabatana, nemamwe mazwi, simba resimbi rinowedzerwa, uye sezvo huwandu hwehupfu hwelatex hunonyungudika hunowedzera, simba resimbi pakati pesimbi nepasi rekongiri rinowedzerwa zvakanyanya; Kuvapo kwenzvimbo dzesimbi dzinochinjika uye dzakasimba kwazvo dzepolymer kwakavandudza mashandiro esimbi uye kuchinjika kwesimbi, nepo elastic modulus yesimbi pachayo yakaderera zvakanyanya, zvichiratidza kuti kuchinjika kwayo kwakagadziridzwa. Firimu relatex rakaonekwa mukati mesimbi mupolymer modral inogadziriswa yesimbi pamazera akasiyana. Firimu rinogadzirwa nelatex rinoparadzirwa munzvimbo dzakasiyana mumota, kusanganisira base-mortar interface, pakati pemapores, kutenderedza madziro epore, pakati pezvigadzirwa zve hydration yesimende, kutenderedza zvidimbu zvesimende, kutenderedza aggregate, uye aggregate-mortar interface. Mamwe mafirimu elatex akaparadzirwa mumota akagadziriswa ne redispersible polymer powder anoita kuti zvikwanisike kuwana hunhu husingakwanise kuva ne rigid cement powder: latex film inogona kubatanidza shrinkage cracks pa base-mortar interface uye kubvumira shrinkage cracks kuti dzipore. Kunatsiridza sealability yemorta. Kuvandudzwa kwe cohesive strength yemorta: Kuvapo kwe flexible polymer domains uye highly elastic polymer domains kunovandudza flexible uye elasticity yemorta, zvichipa kubatana uye dynamic behavior kune rigid skeleton. Kana simba rikashandiswa, microcrack formation inononoka kusvika stresses dzakakwirira dzasvika nekuda kwe flexible uye elasticity iri nani. Interwoven polymer domains inodzivirirawo coalescence ye microcracks mu cracks inopinda. Nokudaro, redispersible latex powder inowedzera lossness yekukundikana uye lossness yekukundikana kwezvinhu. Kugadziriswa kwepolymer kuita simende kunoita kuti zviviri izvi zviwane mhedzisiro inobatsirana, kuitira kuti polymer modified mortar igone kushandiswa muzviitiko zvakawanda zvakakosha. Pamusoro pezvo, nekuda kwezvakanaka zve dry-mix mortar mukudzora mhando, kushanda kwekuvaka, kuchengetera uye kuchengetedza nharaunda, latex powder inonyungudika zvakare inopa nzira inoshanda yekugadzira zvigadzirwa zve dry mortar.
Zvichibva pakushanda kweupfu hwepolymer hunonyungudika mudura, takaita mimwe miedzo yekuenzanisa kuti tione kuti chimwe chinhu chiri kutengeswa pari zvino, chinozivikanwawo se latex powder, mudura chinoshanda sei. 1. Zvinhu zvisina kugadzirwa uye mhedzisiro yebvunzo 1.1 Simende yezvinhu zvisina kugadzirwa: Conch Brand 42.5 Ordinary Portland Cement Jecha: River Jecha, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Ether: Domestic Viscosity 30000-35000mpas (Brookfield Viscometer, Spindle 6, Speed 20) Heavy calcium powder: heavy calcium carbonate powder, fineness is 325 mesh Latex powder: VAE-based redispersible latex powder, Tg value is -7°C, pano inonzi: redispersible latex powder Wood fiber: ZZC500 of JS company Latex powder inowanikwa mukutengeserana: latex powder inowanikwa mukutengeserana, inonzi pano: latex powder inowanikwa mukutengeserana 97. Mechanical test formula ndeiyi: Laboratory standard test conditions: tembiricha (23±2)°C, relative humidity (50±5)%, test Kumhanya kwemhepo inotenderera munzvimbo iyi kuri pasi pe 0.2m/s. Bhodhi repolystyrene rakaumbwa, huwandu hwakawanda hwakaita 18kg/m3, rakachekwa kuita 400×400×5mm. 2． Mhedzisiro yebvunzo: 2.1 Simba rekusunga pasi penguva dzakasiyana dzekupisa: Mienzaniso yakagadzirwa zvichienderana nenzira yekuedza yesimba rekusunga chisungo chemortar muna JG149-2003. Sisitimu yekupisa pano ndeiyi: mushure mekunge sampuro yagadzirwa, inoporeswa kwezuva rimwe pasi pemamiriro akajairwa erabhoritari, uye yozoiswa muovheni yemadhigirii makumi mashanu. Vhiki rekutanga rekuyedza ndeiyi: iise muovheni yemadhigirii makumi mashanu kusvika pazuva rechitanhatu, ibudise, isa musoro webvunzo wekuburitsa, Pazuva rechinomwe, seti yesimba rekuburitsa yakaedzwa. Bvunzo muvhiki rechipiri ndeiyi: iise muovheni yemadhigirii makumi mashanu kusvika pazuva rechi13, ibudise, isa musoro webvunzo wekuburitsa, uye yedza seti yesimba rekuburitsa pazuva rechi14. Vhiki rechitatu, vhiki rechina. . . nezvimwewo.
Kubva mumhedzisiro yacho, tinogona kuona kuti simba reupfu hwelatex hunonyungudikaMumota inowedzera uye inochengetedza sezvo nguva iri munzvimbo inodziya zvakanyanya ichiwedzera, izvo zvakafanana nefirimu relatex iro upfu hwelatex hunonyungudika huchaumbwa mumota. Dzidziso yacho inowirirana, kana nguva yekuchengetedza ikareba, firimu relatex reupfu hwelatex richasvika pakuwanda kwakati, zvichiita kuti dhaka rinamatire panzvimbo yakakosha yebhodhi reEPS. Kusiyana neizvi, upfu hwelatex 97 hunowanikwa mumusika hune simba shoma sezvo hunochengetwa munzvimbo inodziya zvakanyanya kwenguva yakareba. Simba rekuparadza reupfu hwelatex hunopararira kubhodhi reEPS rinoramba rakafanana, asi simba rekuparadza reupfu hwelatex 97 hunowanikwa mumusika hunowedzera kuipa.
Kazhinji, upfu hwelatex hunowanikwa kutengeswa uye upfu hwelatex hunonyungudika hune nzira dzakasiyana dzekushanda, uye upfu hwelatex hunonyungudika, hunoumba firimu muzvikamu zvakasiyana zvemota, hunoshanda sechimwe chinhu chekuwedzera ganda kuti huvandudze hunhu hwemota. Maitiro ekushanda kwemota haana kuenzana.
Nguva yekutumira: Kubvumbi-25-2024