Redispersible latex ufa akhoza kusintha katundu wa matope monga flexural mphamvu ndi adhesion mphamvu, chifukwa akhoza kupanga polima filimu pamwamba pa matope particles.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.
Kuonjezera ufa wa latex ku matope a simenti kumapanga filimu yosinthika kwambiri komanso yotanuka ya polima, yomwe idzawongolere bwino ntchito ya matope, makamaka mphamvu yolimba ya matope idzakhala bwino kwambiri.Pamene mphamvu yakunja ikugwiritsidwa ntchito, chifukwa cha kusinthika kwa mgwirizano wonse wa matope ndi kusungunuka kofewa kwa polima, kuchitika kwa ming'alu yaying'ono kumachepetsedwa kapena kuchepetsedwa.Kupyolera mu chikoka cha latexr ufa wokhutira pa mphamvu ya matope otsekemera otenthetsera, amapezeka kuti mphamvu yowonongeka ya matope otsekemera amawonjezeka ndi kuwonjezeka kwa ufa wa latex;mphamvu ya flexural ndi mphamvu yopondereza imakhala ndi digiri inayake ndi kuwonjezeka kwa ufa wa latex.Mlingo wa kuchepa, komabe kukwaniritsa zofunika za khoma kunja kumaliza.
Mtondo wa simenti wosakanikirana ndi ufa wa latex, mphamvu zake zomangira 28d zimawonjezeka ndi kuwonjezeka kwa ufa wa latex.Ndi kuchuluka kwa ufa wa latex, kuthekera komangiriza matope a simenti ndi konkriti yakale ya simenti kumakhala bwino, zomwe zimatsimikizira ubwino wake pakukonza miyala ya konkire ya simenti ndi zina.Kuphatikiza apo, chiŵerengero chopinda chamatope chimawonjezeka ndi kuwonjezeka kwa ufa wa latex, ndipo kusinthasintha kwa matope a pamwamba kumapita bwino.Panthawi imodzimodziyo, zinapezekanso kuti ndi kuwonjezeka kwa ufa wa latex, modulus yamatope ya matope inachepa poyamba ndiyeno ikuwonjezeka.Pazonse, pakuwonjezeka kwa chiŵerengero cha phulusa, zotanuka modulus ndi deformation modulus ya matope ndizotsika kuposa zamatope wamba.
Nthawi yotumiza: Mar-14-2023