Kusakaniza kumeneku kumathandiza kwambiri pakukweza magwiridwe antchito a matope osakanikirana ndi madzi. Ufa wa latex wosungunukanso umapangidwa ndi emulsion yapadera ya polima pambuyo poumitsa. Ufa wa latex wouma ndi tinthu tating'onoting'ono tozungulira ta 80 ~ 100mm tosonkhanitsidwa pamodzi. Tinthu tating'onoting'onoti timasungunuka m'madzi ndipo timapanga kufalikira kokhazikika kwakukulu pang'ono kuposa tinthu ta emulsion toyambirira, zomwe zimapangitsa filimu pambuyo pochotsa madzi m'thupi ndi kuumitsa.
Njira zosiyanasiyana zosinthira zimapangitsa kuti ufa wa latex wosungunuka ukhale ndi makhalidwe osiyanasiyana monga kukana madzi, kukana alkali, kukana nyengo komanso kusinthasintha. Ufa wa latex womwe umagwiritsidwa ntchito mu matope ukhoza kupititsa patsogolo kukana kwa mphamvu, kulimba, kukana kuwonongeka, kusavuta kumanga, mphamvu yolumikizana ndi mgwirizano, kukana nyengo, kukana kuzizira, kukana madzi, mphamvu yopindika komanso mphamvu yosinthasintha ya matope. Zinthu zopangidwa ndi simenti zikangowonjezeredwa ndi ufa wa latex zikakumana ndi madzi, madzi amayamba, ndipo yankho la calcium hydroxide limafika mwachangu ndipo makristalo amatuluka, ndipo nthawi yomweyo, makristalo a ettringite ndi ma gels a calcium silicate hydrate amapangidwa. Tinthu tolimba timayikidwa pa gel ndi tinthu ta simenti topanda madzi. Pamene madzi akuchulukirachulukira, zinthu zosungunuka zimawonjezeka, ndipo tinthu ta polima timasonkhana pang'onopang'ono m'ma pores a capillary, ndikupanga wosanjikiza wodzaza pamwamba pa gel ndi pa tinthu ta simenti topanda madzi. Tinthu ta polima tomwe timaphatikizidwa timadzaza pang'onopang'ono ma pores.
Ufa wa latex wosinthika ukhoza kusintha makhalidwe a matope monga mphamvu yopindika komanso mphamvu yomatira, chifukwa ukhoza kupanga filimu ya polima pamwamba pa tinthu ta matope. Pali ma pores pamwamba pa filimuyo, ndipo pamwamba pa ma pores pamakhala matope, zomwe zimachepetsa kupsinjika. Ndipo pansi pa mphamvu yakunja, imapanga mpumulo popanda kusweka. Kuphatikiza apo, matopewo amapanga mafupa olimba simenti ikasungunuka, ndipo polima yomwe ili m'mafupayo ili ndi ntchito ya cholumikizira chosunthika, chomwe chimafanana ndi minofu ya thupi la munthu. Nembanemba yopangidwa ndi polimayo ikhoza kuyerekezeredwa ndi mafupa ndi ligaments, kuti zitsimikizire kulimba ndi kusinthasintha kwa mafupa olimba.
Mu dongosolo la matope a simenti osinthidwa ndi polima, filimu ya polima yopitilira komanso yokwanira imalukidwa ndi phala la simenti ndi tinthu ta mchenga, zomwe zimapangitsa kuti matope onse akhale ofewa komanso okhuthala, komanso nthawi yomweyo zimapangitsa kuti netiweki yonse ikhale yolimba podzaza mitsempha ndi mabowo. Chifukwa chake, filimu ya polima imatha kutumiza bwino kupanikizika ndi kupsinjika kwa elastic. Filimu ya polima imatha kulumikiza ming'alu yocheperako pa polima-mortar interface, kuchiritsa ming'alu yocheperako, ndikuwonjezera kutseka ndi mphamvu yolumikizana ya matope. Kupezeka kwa madera a polima osinthasintha komanso otanuka kwambiri kumawongolera kusinthasintha ndi kulimba kwa matope, kupereka mgwirizano ndi machitidwe amphamvu ku mafupa olimba. Mphamvu yakunja ikagwiritsidwa ntchito, njira yofalitsira ming'alu ya microcrack imachedwa chifukwa cha kusinthasintha ndi kulimba bwino mpaka zovuta zazikulu zitapezeka. Madera a polima ophatikizana amagwiranso ntchito ngati cholepheretsa kuphatikizika kwa ming'alu ya microcracks mu ming'alu yolowera. Chifukwa chake, ufa wa polima wotha kusungunuka umawongolera kupsinjika kwa kulephera ndi kupsinjika kwa zinthuzo.
Nthawi yotumizira: Mar-10-2023