Indima yomgubo welatex ophinda uchitheke kwisamente
Okwangoku, njengoko iimveliso ezahlukeneyo ze-mortar ye-dry powder ekhethekileyo zamkelwe kancinci kancinci kwaye zisetyenziswa kakhulu, abantu abakwishishini banikela ingqalelo kwi-latex powder ephinda inyibilike njengenye yezona zinto ziphambili ze-mortar ye-dry powder ekhethekileyo, ngoko ke izinto ezahlukeneyo ziye zavela kancinci kancinci. I-latex powder, i-multi-polymer latex powder, i-resin latex powder, i-resin latex powder esekwe emanzini njalo njalo.
Iimpawu zemicroscopic kunye nokusebenza kwe-macroscopicumgubo welatex ophinda unyibilikekwi-mortar ziyadibaniswa, kwaye ezinye iziphumo zethiyori ziyahlalutywa. Indlela yokusebenza ye-redispersible latex powder Redispersible latex powder kukulungiselela i-polymer emulsion ibe ngumxube onokusetyenziselwa ukomisa nge-spray ngokongeza izongezo ezahlukeneyo, uze wongeze i-colloid ekhuselayo kunye ne-anti-caking agent ukwenza i-polymer form emva kokomisa nge-spray. I-Free-flow powder iphinda ichitheke emanzini. I-redispersible latex powder isasazwa kwi-mortar eyomileyo exutywe ngokulinganayo. Emva kokuba i-mortar ixutywe ngamanzi, i-polymer powder iphinda ichitheke kwi-slurry exutywe ngokutsha kwaye ixutywe kwakhona; ngenxa yokufuma kwesamente, ukufuma komphezulu kunye nokufunxwa komaleko osisiseko, ii-pores ngaphakathi kwi-mortar zikhululekile. Ukusetyenziswa okuqhubekayo kwamanzi kunye ne-alkaline okusingqongileyo okunamandla okunikezelwa yi-samente kwenza amasuntswana e-latex ome ukuze enze ifilimu eqhubekayo enganyibiliki emanzini kwi-mortar. Le filimu eqhubekayo yenziwa kukudibana kwamasuntswana ahlukeneyo kwi-emulsion abe ngumzimba ofanayo. Ubukho bezi filimu zelatex ezisasazwa kwi-polymer modral eguqulweyo yi-polymer obenza i-polymer modral ifumane iimpawu ezingenakuba nazo i-rigid cement mortar: ngenxa yendlela yokuzolula yefilimu yelatex, inokuxhonywa kwisiseko okanye kwi-mortar. Kwi-interface ye-polymer modral eguqulweyo yi-polymer kunye nesiseko, esi siphumo sinokuphucula ukusebenza kwe-bonding ye-mortar kunye neziseko ezahlukeneyo, njengokunamathela kweziseko ezikhethekileyo ezifana neethayile ze-ceramic ezinobunzima obuphezulu kunye neebhodi ze-polystyrene; Esi siphumo ngaphakathi kwe-mortar sinokuyigcina iyonke, ngamanye amazwi, amandla adibeneyo e-mortar aphucuka, kwaye njengoko inani le-latex powder ephinda inyibilike kwakhona likhula, amandla e-bonding phakathi kwe-mortar kunye nesiseko sekhonkrithi aphucuka kakhulu; Phezulu Ubukho beendawo ze-polymer eziguquguqukayo nezithambileyo kakhulu buphucule kakhulu ukusebenza kwe-bonding kunye nokuguquguquka kwe-mortar, ngelixa i-elastic modulus ye-mortar ngokwayo yehla kakhulu, nto leyo ebonisa ukuba ukuguquguquka kwayo kuphuculwe. I-Latex film ebonwe ngaphakathi kwi-mortar kwi-polymer modral eguqulweyo yi-polymer kwiminyaka eyahlukeneyo. Ifilimu eyenziwe yi-latex isasazwa kwiindawo ezahlukeneyo kwi-mortar, kubandakanya i-base-mortar interface, phakathi kwee-pores, udonga lwe-pore, phakathi kweemveliso ze-samente hydration, ujikeleze amasuntswana esamente, ujikeleze i-aggregate, kunye ne-aggregate-mortar interface. Ezinye iifilimu ze-latex ezisasazwa kwi-mortar eziguqulwe yi-redispersible polymer powder zenza kube nokwenzeka ukufumana iipropati ezingenakuba nazo i-rigid cement mortar: ifilimu ye-latex inokuvala ii-shrinkage cracks kwi-base-mortar interface kwaye ivumele ii-shrinkage cracks ukuba ziphilise. Ukuphucula ukutywinwa kwe-mortar. Ukuphuculwa kwamandla adibeneyo e-mortar: Ubukho bee-polymer domains eziguquguqukayo kakhulu nezithambileyo kakhulu buphucula ukuguquguquka kunye nokuqina kwe-mortar, bubonelela ngokuhambelana kunye nokuziphatha okuguquguqukayo kwi-skeleton eqinileyo. Xa kusetyenziswa amandla, ukwakheka kwe-microcrack kuyalibaziseka de kufikelelwe kwiingcinezelo eziphezulu ngenxa yokuguquguquka okuphuculweyo kunye nokuqina. Ii-polymer domains ezidibeneyo nazo zithintela ukuhlangana kwee-microcracks kwii-cracks ezingenayo. Ke ngoko, i-latex powder ephinda isasazwe yonyusa uxinzelelo lokungaphumeleli kunye noxinzelelo lokungaphumeleli kwezinto. Ukuguqulwa kwepolymer ibe yi-samente mortar kwenza ezi zimbini zifumane iziphumo ezihambelanayo, ukuze i-polymer modified mortar ingasetyenziswa kwiimeko ezininzi ezikhethekileyo. Ukongeza, ngenxa yeenzuzo ze-dry-mix mortar ekulawuleni umgangatho, ukusebenza kolwakhiwo, ukugcina kunye nokukhusela okusingqongileyo, i-latex powder ephinda ichitheke ibonelela ngeendlela zobugcisa ezisebenzayo zokuvelisa iimveliso ze-dry mortar ezikhethekileyo.
Ngokusekelwe kwindlela esebenza ngayo ipowder yepolymer ephinda inyibilike kwimortar, senze uvavanyo oluthile lokulinganisa ukuqinisekisa ukusebenza kwesinye isixhobo esikwimarike ngoku, esaziwa ngokuba yi-latex powder, kwimortar. 1. Izinto ezisetyenzisiweyo kunye neziphumo zovavanyo 1.1 Isamente yezinto ezisetyenzisiweyo: I-Conch Brand 42.5 I-Ordinary Portland Cement Sand: I-River Sand, i-Silicon Content 86%, i-Fineness 50-100 Mesh Cellulose Ether: I-Domestic Viscosity 30000-35000mpas (Brookfield Viscometer, Spindle 6, Speed 20) I-heavy calcium powder: i-heavy calcium carbonate powder, i-fineness yi-325 mesh I-Latex powder: i-redispersible latex powder esekwe kwi-VAE, ixabiso le-Tg yi--7°C, apha ibizwa ngokuba: i-redispersible latex powder I-Wood fiber: ZZC500 yenkampani ye-JS I-latex powder efumanekayo kwintengiso: i-latex powder efumaneka kwintengiso, ebizwa ngokuba yi-redispersible latex powder 97. Ifomyula yovavanyo loomatshini yile: Iimeko zovavanyo ezisemgangathweni zelebhu: ubushushu (23±2)°C, ukufuma okuqhelekileyo (50±5)%, uvavanyo Isantya somoya ojikelezayo kwindawo singaphantsi kwe-0.2m/s. Ibhodi yepolystyrene ekhutshiweyo ebumbeneyo, ubunzima bayo buyi-18kg/m3, inqunyulwe ibe yi-400×400×5mm. 2． Iziphumo zovavanyo: 2.1 Amandla okuxinana phantsi kwexesha lokupholisa elahlukileyo: Iisampuli zenziwe ngokwendlela yovavanyo lwamandla okuxinana kwe-mortar kwi-JG149-2003. Inkqubo yokuxinana apha yile: emva kokuba isampulu yenziwe, iyanyangwa usuku olunye phantsi kweemeko eziqhelekileyo zelebhu, ize ibekwe kwi-oven ye-50-degree. Iveki yokuqala yovavanyo yile: yibeke kwi-oven ye-50-degree kude kube lusuku lwesithandathu, yikhuphe, yincamathisele intloko yovavanyo yokuyikhupha, Ngomhla wesi-7, kwavavanywa iseti yamandla okuyikhupha. Uvavanyo kwiveki yesibini yile: yibeke kwi-oven ye-50-degree kude kube lusuku lwe-13, yikhuphe, yincamathisele intloko yovavanyo yokuyikhupha, kwaye uvavanye iseti yamandla okuyikhupha ngomhla we-14. Iveki yesithathu, iveki yesine. . . njalo njalo.
Kwiziphumo, sinokubona ukuba amandla e-umgubo welatex ophinda unyibilikeKwi-mortar iyanda kwaye igcina njengoko ixesha kwindawo enobushushu obuphezulu likhula, nto leyo efana nefilimu ye-latex eya kwenziwa yi-latex powder echithwa ngokutsha kwi-mortar. Ithiyori iyahambelana, okukhona ixesha lokugcina lide, ifilimu ye-latex ye-latex powder iya kufikelela kuxinano oluthile, ngaloo ndlela iqinisekisa ukunamathela kwe-mortar kumphezulu okhethekileyo webhodi ye-EPS. Ngokwahlukileyo koko, i-latex powder 97 ethengiswayo inamandla aphantsi njengoko igcinwa kwindawo enobushushu obuphezulu ixesha elide. Amandla okutshabalalisa e-latex powder echithwayo kwibhodi ye-EPS ahlala efana, kodwa amandla okutshabalalisa e-latex powder 97 ethengiswayo kwibhodi ye-EPS aya esiba mandundu.
Ngokubanzi, umgubo we-latex othengiswayo kunye nomgubo we-latex ophinda uqhekeke uneendlela ezahlukeneyo zokusebenza, kwaye umgubo we-latex ophinda uqhekeke, owenza ifilimu kwiindawo ezahlukeneyo zomgubo, usebenza njengesixhobo sesibini sokuguqula i-gelling ukuphucula iipropati zomzimba zomgubo. Indlela yokusebenza yokusebenza ayihambelani.
Ixesha leposi: Epreli-25-2024