Pofuna kukonza brittleness ndi mkulu zotanuka modulus wa chikhalidwe simenti matope mu matope, nthawi zambiri kofunika kuwonjezera redispersible latex ufa monga chowonjezera, amene angapereke matope matope a simenti bwino kusinthasintha ndi nyonga nyonga. Kukana ndi kuchedwetsa m'badwo wa simenti matope ming'alu, chifukwa polima ndi matope kupanga interpenetrating maukonde dongosolo, mosalekeza polima filimu aumbike mu pores, amene kumalimbitsa mgwirizano pakati aggregates ndi midadada mbali mu matope Pores, kotero kusinthidwa matope ataumitsa achita bwino kwambiri kuposa matope a simenti.
The latex ufa amapangidwa ndi kutentha kwambiri, kuthamanga kwambiri, kuyanika utsi ndi homopolymerization ndi zosiyanasiyana yogwira kulimbikitsa ma micropowders, amene angathe kwambiri kusintha luso kugwirizana ndi kumakoka mphamvu ya matope, ndipo ali ndi ntchito yabwino yomanga odana kugwa, posungira madzi ndi thickening. , kukana kwa madzi ndi kukana kusungunuka kwa madzi , Kutentha kwabwino kukana kukalamba, zosakaniza zosavuta, zosavuta kugwiritsa ntchito. Xindadi lalabala ufa ali ngakhale kwambiri ndi simenti, akhoza kusungunuka kwathunthu mu simenti ofotokoza youma-osakaniza matope phala, si kuchepetsa mphamvu ya simenti pambuyo kuchiritsa, osati amasunga zomatira kwambiri, filimu kupanga katundu ndi kusinthasintha, komanso ali wabwino. Kukana kwanyengo, kukhazikika, magwiridwe antchito ogwirizana komanso kukana kwa ming'alu. Pambuyo kuyanika, imatha kuteteza kukokoloka kwa mpweya wa acidic pakhoma, ndipo sikophweka kupukuta ndi kupukuta pambuyo ponyowa. Ikhoza kuwonjezera mphamvu ya mankhwala. Kuwonjezera redispersible latex ufa ku putty ufa ndi matope akhoza kuwonjezera mphamvu zake, ndipo zimathandiza kwambiri kukonza kuuma. Imakhala ndi magwiridwe antchito abwino kwambiri osalowa madzi, mphamvu yomangirira bwino, imathanso kukulitsa kukhuthala kwa matope ndikukhala ndi nthawi yotseguka yotalikirapo, ndikupangitsa kuti matopewo akhale ndi mphamvu yabwino ya alkali, ndipo amatha kukonza kumamatira / kumamatira komanso kukana kwamatope. Kuphatikiza pa mphamvu, kuvala kukana ndi kukhazikika, kumakhala ndi kusinthasintha kwamphamvu mumatope oletsa kuphulika.
Kunena zongoyerekeza, ufa wa latex wokhala ndi kutentha kwa galasi pansi pa 5 ° C umakhala wosinthika kwambiri ndipo umagwiritsidwa ntchito kwambiri mumatope otsekera khoma, ndipo ufa wa latex wokhala ndi kutentha kwagalasi pamwamba pa 10 ° C umagwiritsidwa ntchito makamaka pazomatira komanso kudziwongolera. matope .
Kutengera kapangidwe ka matope, kugwiritsa ntchito kwa matope kudzakhudzidwanso ndi kusintha kwa kuchuluka kwa ufa wowonjezera wa latex ufa: kuchuluka kowonjezera kwa ufa wa latex wopangidwanso ndi wochepera 1%, womwe uli ndi mphamvu zina. pakupanga ndi kumamatira kwa matope; Kuwonjezera kwa redispersible latex powder ndi 1, 2.0%, yomwe imapangitsa mphamvu, kukana madzi ndi kusinthasintha kwa matope; Kuwonjezera redispersible latex ufa ndi 2.0, 5%, kupanga network polima filimu mu matope. Pansi pa nyengo ndi malo osiyanasiyana, mphamvu ndi kusinthasintha kwa matope mwachiwonekere zimawongoka.
Pankhani ya ufa wochuluka wa latex, gawo la polima mumatope ochiritsidwa pang'onopang'ono limadutsa gawo la mankhwala a inorganic hydration, ndipo matope amasintha bwino ndikukhala thupi lotanuka, pamene hydration mankhwala a simenti amakhala "filler". ”. Kanema wopangidwa ndi ufa wopangidwa ndi redispersible latex ufa wogawika pamawonekedwewo umagwiranso ntchito ina yofunika kwambiri, ndiko kuti, kupititsa patsogolo kumamatira kuzinthu zomwe zalumikizidwa, zomwe ndizoyenera kumalo ena ovuta kumamatira, monga mayamwidwe otsika kwambiri kapena Osakhala nawo. zinthu zoyamwa (monga konkire yosalala ndi zinthu za simenti, mbale zachitsulo, njerwa zopanda homogeneous, malo a njerwa, etc.) ndi zinthu zakuthupi (monga matabwa a EPS, mapulasitiki, ndi zina zotero) ndizofunikira kwambiri. Chifukwa kugwirizana kwa zinthuzo ndi zomatira za meta-makina zimatheka kudzera mu mfundo yoyika makina, ndiye kuti, hydraulic slurry imalowa m'mipata ya zinthu zina, imalimba pang'onopang'ono, ndipo pamapeto pake imagwira matope ngati fungulo lomwe limayikidwa mu loko. . Pamwamba pa zinthu, chifukwa pamwamba movutikira chomangira pamwamba, chifukwa kulephera mogwira kudutsa mu zinthu kupanga wabwino makina embedding, matope ndi zomatira yekha inorganic si mogwira anagwirizana izo, ndi elekitironi. kuyang'ana pa microscope nakonso ndikwabwino kwambiri. Izo zimatsimikizira izo. Njira yolumikizira ma polima ndi yosiyana. Ma polima omangika ndi pamwamba pa zinthu zina ndi mphamvu za intermolecular, osadalira porosity ya pamwamba (zowona, pamwamba pazambiri komanso kukhudzana kowonjezereka kumapangitsa kuti mphamvu yolumikizana ikhale bwino) , zomwe zikuwonekera kwambiri pankhani ya organic substrates, ndi kuyang'ana kwa maikulosikopu a elekitironi kumatsimikiziranso kuti mphamvu yake yomatira ndiyopambana.
Ufa wa latex umasintha kusasinthasintha ndi kuterera kwa dongosolo mumkhalidwe wosakanikirana wonyowa, ndipo mgwirizano umatheka powonjezera ufa wa latex. Pambuyo kuyanika, amapereka yosalala ndi wandiweyani pamwamba wosanjikiza ndi mgwirizano mphamvu, ndipo bwino mawonekedwe zotsatira za mchenga, miyala ndi pores. , yolemeretsedwa mufilimu pa mawonekedwe, zomwe zimapangitsa kuti zomatira za matailosi zikhale zosavuta, zimachepetsa modulus zotanuka, zimatengera kupsinjika kwa kutentha kwa kutentha kwambiri, ndipo zimakhala ndi madzi osakanizidwa pambuyo pake, ndipo kutentha kwa bafa ndi kupunduka kwa zinthu sizikugwirizana. . Kusinthasintha ndi kusasunthika kwa ufa wa latex kumatha kuweruzidwa molingana ndi kutentha kwa magalasi. Ngati kutentha kwa galasi kuli pansi pa madigiri 0, kumakhala kosavuta. Ndi mtundu uti wa ufa wa latex womwe umafunika mumatope nthawi zambiri umatsimikiziridwa molingana ndi machitidwe a mankhwala. Zomata matailosi zimafunika kugwiritsa ntchito ufa wa latex wokhala ndi zomatira bwino.
Nthawi yotumiza: Mar-14-2023