Indima ye-latex powder ephinda ikwazi ukuchithwa kwidaka
Okwangoku, njengoko iimveliso ezikhethekileyo zodaka omisiweyo omisiweyo zimkelwa ngokuthe ngcembe kwaye zisetyenziswa ngokubanzi, abantu abakwishishini banikela ingqalelo kumgubo welatex ophinda wahlakazeka njengenye yezongezo eziphambili zodaka olukhethekileyo olomileyo, ngoko ke iimpawu ezahlukeneyo ziye zavela ngokuthe ngcembe. I-latex powder, i-multi-polymer latex powder, i-resin latex powder, i-resin esekelwe emanzini e-latex powder njalo njalo.
Iimpawu zemicroscopic kunye nokusebenza okukhulu kwei-latex powder enokuchithwa kwakhonakudaka ziyadityaniswa, kwaye ezinye iziphumo zethiyori zihlalutywa. Indlela yokusebenza ye-latex powder edispersible redispersible latex powder kukulungisa i-polymer emulsion ibe ngumxube ongasetyenziselwa ukomisa isitshizi ngokudibanisa izongezelelo ezahlukeneyo, kwaye emva koko wongeze i-colloid ekhuselayo kunye ne-anti-caking agent ukwenza ifom yepolymer emva kokumisa isitshizi. Umgubo oqukuqelayo simahla uphinda uhlakazwe emanzini. I-latex powder enokuchithwa kwakhona isasazwa kudaka olomileyo oluxutywe ngokulinganayo. Emva kokuba udaka luxutywe ngamanzi, i-polymer powder iphinde ihlakazwe kwi-slurry esanda kuxutywa kwaye i-emulsified kwakhona; ngenxa ye-hydration ye-cement, i-evaporation ye-surface kunye ne-absorption ye-base layer, i-pores ngaphakathi kwe-mortar ikhululekile. Ukusetyenziswa ngokuqhubekayo kwamanzi kunye nokusingqongileyo okunamandla kwe-alkaline okubonelelwa nge-samente kwenza iinqununu ze-latex zome ukuze zenze ifilimu eqhubekayo engenamanzi emanzini. Le filimu eqhubekayo yenziwa ngokuxutywa kweengqungquthela ezidibeneyo ezihlakazekileyo kwi-emulsion ibe ngumzimba olinganayo. Bubukho bezi filimu ze-latex ezisasazwe kwi-polymer modified mortar eyenza ukuba i-polymer modified mortar ifumane iimpawu ezingenakukwazi ukufumana udaka lwesamente oluqinileyo: ngenxa yendlela yokuzolula yefilimu ye-latex, inokubotshelelwa kwisiseko okanye udaka Kujongano lwepolymer udaka oluguquliweyo kunye nesiseko, esi siphumo sinokuphucula udaka lwesamente oluluqilima olungenako ukuba nalo: ngenxa yendlela yokuzolula yefilimu ye-latex, inokubotshelelwa kwisiseko okanye udaka Kwi-interface yodaka oluguquliweyo lwepolymer kunye nesiseko, esi siphumo sinokuphucula udaka lwesamente oluqinileyo njengesiseko esikhethekileyo sodaka kunye nesiseko esikhethekileyo. iithayile ze-ceramic ezinobuninzi obuphezulu kunye neebhodi ze-polystyrene; Esi siphumo ngaphakathi kodaka sinokuyigcina iyonke, ngamanye amazwi, amandla adibeneyo omdaka aphuculwe, kwaye njengoko inani le-latex powder eliphindwe kabini linyuka, amandla okubambisana phakathi kodaka kunye nesiseko sekhonkrithi aphuculwe kakhulu; Phezulu Ubukho beendawo eziguquguqukayo kunye ne-elastic polymer domains ziphucule kakhulu ukusebenza kwe-bonding kunye nokuguquguquka kodaka, ngelixa i-modulus e-elastic ye-mortar ngokwayo yehla kakhulu, ebonisa ukuba ukuguquguquka kwayo kuphuculwe. Ifilimu yeLatex ebonwe ngaphakathi kodaka kwipolymer eguqulwe ngodaka lwesamente kwiminyaka eyahlukeneyo. Ifilimu eyenziwe yi-latex isasazwa kwiindawo ezahlukeneyo kwi-mortar, kubandakanywa ne-base-mortar interface, phakathi kwe-pores, ejikeleze udonga lwama-pore, phakathi kweemveliso ze-cement hydration, malunga neengqungquthela ze-samente, ezijikeleze i-aggregate, kunye ne-aggregate-mortar interface. Ezinye iifilim zelatex ezisasazwe kudaka oluguqulwe ngomgubo wepolymer odispersible zenza ukuba kufumaneke iipropathi ezinodaka lwesamente olomeleleyo olungenako ukuba nazo: ifilimu yelatex inokuvala iintanda zokuqhekeka kwisiseko sodaka kwaye ivumele ukuqhekeka kokuqhekeka kuphole. Phucula ukutywinwa kodaka. Ukuphuculwa kwamandla okudityaniswa kodaka: Ubukho beendawo eziguquguqukayo kakhulu kunye ne-elastic polymer domains kuphucula ukuguquguquka kunye nokuqina kodaka, ukubonelela ngokubambisana kunye nokuziphatha okuguquguqukayo kwi-skeleton eqinile. Xa kunyanzeliswa ukunyanzeliswa, ukubunjwa kwe-microcrack kulibaziseka de kufikeleleke uxinzelelo oluphezulu ngenxa yokuphucula ukuguquguquka kunye nokuqina. Imimandla ye-polymer ephothiweyo iphinda ithintele ukudityaniswa kwee-microcracks kwiintanda ezigqobhozayo. Ngoko ke, i-latex powder ehlaziywayo ikwandisa uxinzelelo lokungaphumeleli kunye nokungaphumeleli kwezinto eziphathekayo. Ukuguqulwa kwepolymer kumdaka we-samente kwenza ezimbini zifumane iziphumo ezihambelanayo, ukwenzela ukuba i-polymer modified mortar ingasetyenziswa kwiimeko ezininzi ezikhethekileyo. Ukongezelela, ngenxa yeenzuzo zodaka oluxubeneyo olunomileyo ekulawuleni umgangatho, ukusebenza kokwakhiwa, ukugcinwa kunye nokukhuselwa kwendalo, i-latex powder edibeneyo inikezela ngeendlela ezisebenzayo zobugcisa zokuvelisa iimveliso ezikhethekileyo zodaka olomileyo.
Ngokusekwe kwindlela yokusebenza kwepolymer powder enokuphinda ihlakazwe eludaka, senze iimvavanyo ezithile zokuthelekisa ukuqinisekisa ukusebenza kwenye into ekhoyo ngoku kwimarike, eyaziwa ngokuba yi-latex powder, kudaka. 1. Izinto ezisetyenziswayo kunye neziphumo zovavanyo 1.1 I-samente ye-Raw material: I-Conch Brand 42.5 I-Ordinary Portland Cement Sand: i-River Sand, i-Silicon Content 86%, i-Fineness 50-100 Mesh Cellulose Etere: I-Domestic Viscosity 30000-35000mpas (i-Brookfield 2 i-powder enzima, i-Speed calcium Viscometer) i-carbonate powder, i-fineness yi-325 mesh I-Latex powder: i-VAE-based redispersible latex powder, ixabiso le-Tg yi-7 ° C, apha libizwa ngokuba: i-redispersible latex powder I-Wood fiber: ZZC500 yenkampani ye-JS Ukuthengiswa kwe-latex powder: i-latex powder ekhoyo ngokurhweba, ebizwa apha: i-formula ekhoyo ngokurhweba i-latex powder test standard: Iimeko ze-Laboratory test standard: I-Laboratory test standard: (23±2)°C, ukufuma okunxulumeneyo (50±5)%, uvavanyo Isantya somoya ojikelezayo kwindawo singaphantsi kwe-0.2m/s. Ibhodi eyandisiweyo ye-polystyrene eyandisiweyo, ukuxinana kwe-bulk yi-18kg / m3, inqunywe kwi-400 × 400 × 5mm. 2. Iziphumo zovavanyo: 2.1 Amandla e-tensile phantsi kwexesha elahlukileyo lokunyanga: Iisampulu zenziwe ngokwendlela yokuvavanya amandla ebhondi yodaka kwi-JG149-2003. Inkqubo yokunyanga apha yile: emva kokuba isampuli yenziwe, iphiliswa usuku olunye phantsi kweemeko eziqhelekileyo zebhubhoratri, kwaye ifakwe kwi-oven ye-50-degree. Iveki yokuqala yokuvavanya: yifake kwi-oven ye-50-degree de kube yimini yesithandathu, yikhuphe, unamathele intloko yokuvavanya ukukhupha , Ngomhla we-7, isethi yamandla okukhupha yavavanywa. Uvavanyo kwiveki yesibini kukuba: yifake kwi-oven ye-50-degree de kube yimini ye-13, yikhuphe, unamathele intloko yokuvavanya ukukhupha, kwaye uvavanye isethi yamandla okukhupha ngosuku lwe-14. Iveki yesithathu, iveki yesine. . . kwaye nangokunjalo.
Kwiziphumo, sinokubona ukuba amandla ei-latex powder enokuchithwa kwakhonakumdaka ukwanda kunye nokugcina njengoko ixesha kwindawo yokushisa ephezulu linyuka, elifana nefilimu ye-latex ukuba i-latex ye-latex powder iya kubumba kwi-mortar Ithiyori ihambelana, ixesha elide lokugcina, ifilimu ye-latex ye-latex powder iya kufikelela kubuninzi obuthile, ngaloo ndlela iqinisekisa ukunamathela kodaka kwisiseko esikhethekileyo somgangatho webhodi ye-EPS. Ngokuchasene noko, i-latex powder 97 ekhoyo ngokurhweba inamandla angaphantsi njengoko igcinwe kwindawo ephezulu yokushisa ixesha elide. Amandla okutshabalalisa i-disperible latex powder kwibhodi ye-EPS ahlala efana, kodwa amandla okutshabalalisa i-latex powder ekhoyo ngokurhweba i-97 kwibhodi ye-EPS iya iba yimbi ngakumbi.
Ngokuqhelekileyo, i-latex powder ekhoyo ngokurhweba kunye ne-latex powder ene-redispersible ineendlela ezahlukeneyo zokwenza, kunye ne-latex powder edibeneyo, eyenza ifilimu kwiindawo ezahlukeneyo zodaka, isebenza njenge-gelling yesibini yokuphucula iimpawu zomzimba zodaka. Indlela yokusebenza komsebenzi ayihambelani.
Ixesha lokuposa: Apr-25-2024