Kodi redispersible polima ufa zimakhudza bwanji kusinthasintha kwa matope?

Kuphatikizikako kumapangitsa kuti ntchito yomanga matope owuma ikhale yabwino. Redispersible latex ufa amapangidwa ndi kutsitsi kuyanika wapadera polima emulsion. Ufa wouma wa polima ndi 80 ~ 100mm tinthu tozungulira tomwe tasonkhanitsidwa pamodzi. Izi particles mosavuta sungunuka m'madzi, kupanga khola kubalalitsidwa pang'ono lalikulu kuposa choyambirira emulsion particles, ndi kupanga filimu pambuyo 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. Redispersible latex ufa wamatope ukhoza kupititsa patsogolo kukana, kulimba, kukana kuvala, kumasuka kwa zomangamanga, mphamvu ya mgwirizano ndi mgwirizano, kukana kwa nyengo, kukana kuzizira, kukana madzi, kusinthasintha mphamvu ndi kukana kwa mphamvu yopinda yamatope. Malingana ngati zinthu za simenti zomwe zili ndi ufa wa latex zikukhudzana ndi madzi, hydration reaction idzayamba, ndipo yankho la calcium hydroxide posachedwapa lidzadzaza ndi crystallize. Panthawi imodzimodziyo, makristasi a ettringite ndi calcium silicate hydrate gels amapangidwa. Zolimba particles 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, kupanga wandiweyani kudzikundikira wosanjikiza pa gel osakaniza pamwamba ndi unhydrated simenti particles. The akaphatikizana polima particles pang`onopang`ono kudzaza pores.

Redispersible latex ufa ukhoza kupititsa patsogolo mphamvu yopindika komanso mphamvu yomangirira yamatope chifukwa imatha 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 idzapumula popanda kusweka pansi pa mphamvu yakunja. Kuphatikiza apo, matopewo amapanga chigoba cholimba pambuyo pothira simenti, ndipo polima mu chigobacho chimakhala ndi ntchito yolumikizana, yofanana ndi minofu ya thupi la munthu. Nembanemba yopangidwa ndi polima imatha kufaniziridwa ndi zolumikizira ndi mitsempha, motero kuonetsetsa kuti mafupawo ndi olimba komanso kusinthasintha kwa mafupa olimba.

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, kupangitsa matope onse kukhala abwino, 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. Kanema wa polima amatha kutsekereza ming'alu ya matope a polima, kuchiritsa ming'alu ya matope, ndikuwongolera kusindikiza ndi kumangirira mphamvu ya matope. Kukhalapo kwa madera osinthika kwambiri komanso otanuka kwambiri a polima kumawonjezera kusinthasintha ndi kusungunuka kwa matope, kupereka mgwirizano ndi mphamvu zamphamvu ku mafupa olimba. Pamene mphamvu yakunja ikugwiritsidwa ntchito, njira ya kukula kwa microcrack imachedwa mpaka kupanikizika kwakukulu kumafikira chifukwa cha kusinthasintha kwakukulu ndi kusinthasintha. Ma interwoven polima madambwe amakhalanso ngati chotchinga cha ma microcracks kuti aphatikizidwe mu ming'alu yolowera. Choncho, redispersible polima ufa kumawonjezera kulephera kupsinjika ndi kulephera kwa zinthu.