The admixture ali ndi zotsatira zabwino pa kuwongolera ntchito yomanga youma-osakaniza matope, ndi redispersible mphira ufa amapangidwa wapadera polima emulsion pambuyo kutsitsi kuyanika. Ufa wa rabara wowuma ndi tinthu tating'ono tozungulira 80 ~ 100mm tasonkhanitsidwa pamodzi. Tinthu tating'onoting'ono timasungunuka m'madzi ndikupanga kubalalitsidwa kokhazikika kokulirapo pang'ono kuposa tinthu tating'ono ta emulsion, zomwe zimapanga filimu itatha kutaya madzi m'thupi ndi kuyanika.
Njira zosinthira zosinthika zimapangitsa kuti ufa wa latex wogawanikanso ukhale ndi zinthu zosiyanasiyana monga kukana madzi, kukana kwa alkali, kukana kwanyengo komanso kusinthasintha. Ufa wa mphira womwe umagwiritsidwa ntchito mumatope ukhoza kupititsa patsogolo kukana, kulimba, kukana kuvala, kumasuka kwa zomangamanga, mphamvu zomangirira ndi mgwirizano, kukana nyengo, kukana kuzizira, kuthamangitsa madzi, mphamvu yopindika ndi kusinthasintha kwa matope. Malingana ngati zinthu za simenti zokhala ndi ufa wa latex zikukhudzana ndi madzi, hydration reaction idzayamba, ndipo yankho la calcium hydroxide posachedwapa lidzakhuta ndipo makhiristo adzawomba. Panthawi imodzimodziyo, makristasi a ettringite ndi calcium silicate hydrate gels adzapangidwa. The particles olimba waikamo pa gel osakaniza ndi unhydrated simenti particles. Pamene hydration anachita ikupita patsogolo, ndi hydration mankhwala kuwonjezeka, ndi polima particles pang'onopang'ono kusonkhana mu capillary pores, n'kupanga wandiweyani odzaza wosanjikiza padziko gel osakaniza ndi pa unhydrated simenti particles. The akaphatikizana polima particles pang`onopang`ono kudzaza pores.
Redispersible latex ufa amatha kupititsa patsogolo mphamvu yopindika ndi kumamatira kwamatope chifukwa amatha kupanga filimu ya polima pamwamba pa tinthu tamatope. Pali pores pamwamba pa filimuyi, ndipo pamwamba pa pores amadzazidwa ndi matope, zomwe zimachepetsa kupsinjika maganizo. Ndipo pansi pa mphamvu yakunja, idzatulutsa mpumulo popanda kusweka. Kuphatikiza apo, matopewo amapanga chigoba cholimba pambuyo pothira simenti, ndipo polima mu chigobacho chimakhala ndi ntchito yolumikizana, yomwe ili yofanana ndi minofu ya thupi la munthu. Nembanemba yopangidwa ndi polima imatha kufananizidwa ndi zimfundo ndi mitsempha, kuti zitsimikizire kukhazikika komanso kusinthasintha kwa mafupa olimba. kulimba.
M'makina amatope a simenti opangidwa ndi polima, filimu yopitilira ndi yokwanira ya polima imalumikizidwa ndi phala la simenti ndi tinthu tating'onoting'ono ta mchenga, zomwe zimapangitsa kuti matope onse azikhala owoneka bwino komanso olimba, komanso nthawi yomweyo kupanga maukonde onse otanuka podzaza ma capillaries ndi ma cavities. Chifukwa chake, filimu ya polima imatha kufalitsa bwino kupanikizika ndi kupsinjika zotanuka. Filimu ya polima imatha kutsekereza ming'alu ya matope a polima, kuchiritsa ming'alu ya matope, ndikuwongolera kusindikiza ndi kuphatikizika kwa matope. Kukhalapo kwa madera osinthika kwambiri komanso otanuka kwambiri a polima kumathandizira kusinthasintha komanso kukhazikika kwa matope, kupereka mgwirizano ndi machitidwe osunthika ku mafupa olimba. Pamene mphamvu yakunja ikugwiritsidwa ntchito, njira yofalitsa microcrack imachedwa chifukwa cha kusinthasintha kwabwino ndi kusungunuka mpaka kupanikizika kwakukulu kufikiridwa. The interwoven polima madambwe amakhalanso ngati chotchinga coalescence wa microcracks mu ming'alu olowera. Choncho, redispersible polima ufa amathandizira kulephera kupsinjika ndi kulephera kwa zinthuzo.
Nthawi yotumiza: Feb-20-2023