Musanganiswa uyu une simba rakanaka pakuvandudza mashandiro edhaka rakasanganiswa rakaoma. Upfu hwelatex hunonyungudika hunogadzirwa nepolymer emulsion chaiyo mushure mekupfapfaidza. Upfu hwelatex hwakaomeswa hunenge huine zvidimbu zvakatenderera zve 80 ~ 100mm zvakaunganidzwa pamwe chete. Zvikamu izvi zvinonyungudika mumvura uye zvinoumba kupararira kwakasimba kwakakura zvishoma pane zvimedu zvepakutanga zveemulsion, izvo zvinoumba firimu mushure mekushaya mvura uye kuoma.
Matanho akasiyana ekugadzirisa anoita kuti upfu hwelatex hunonyungudika huve nehunhu hwakasiyana hwakadai sekudzivirira mvura, kudzivirira alkali, kudzivirira mamiriro ekunze uye kuchinjika. Upfu hwelatex hunoshandiswa mudura hunogona kuvandudza kupesana, kugara kwenguva refu, kuramba kupera, nyore kuvaka, simba rekubatanidza uye kubatana, kuramba mamiriro ekunze, kuramba kunyungudika nechando, kudzivirira mvura, kusimba kwekukotama uye simba rekuchinja kwedura. Kana zvinhu zvakagadzirwa nesimende zvawedzerwa ne latex powder zvasangana nemvura, reaction ye hydration inotanga, uye calcium hydroxide solution inokurumidza kusvika pakuzara uye makristaro anowira, uye panguva imwe chete, makristaro e ettringite uye calcium silicate hydrate gels zvinoumbwa. Zvidimbu zvakasimba zvinoiswa pagel uye zvidimbu zvesimende zvisina mvura. Sezvo reaction ye hydration ichienderera mberi, zvigadzirwa zve hydration zvinowedzera, uye zvidimbu zve polymer zvinoungana zvishoma nezvishoma muma capillary pores, zvichiita layer yakazara pamusoro pe gel uye pazvidimbu zvesimende zvisina mvura. Zvidimbu zve polymer zvakaunganidzwa zvishoma nezvishoma zvinozadza ma pores.
Upfu hwelatex hunodzokororwa hunogona kuvandudza hunhu hwemota dzakadai sekusimba kweflexural uye simba rekunamatira, nekuti hunogona kugadzira polymer film pamusoro pezvidimbu zvemota. Kune maburi pamusoro pefirimu, uye pamusoro pemaburi pazere nemota, izvo zvinoderedza kushushikana. Uye pasi pesimba rekunze, rinoburitsa zororo risingatyoke. Pamusoro pezvo, mota inoumba skeleton yakasimba mushure mekunge simende yanyoroveswa, uye polymer iri muskeleton ine basa rejointi inofambiswa, yakafanana nenyama yemuviri wemunhu. Kamudzira kakagadzirwa nepolymer kanogona kuenzaniswa nemajointi nema ligaments, kuitira kuti ive nechokwadi chekusimba uye kusimba kweskeleton yakasimba.
Muhurongwa hwesimbi yesimbi yakachinjwa nepolymer, firimu repolymer rinoenderera mberi uye rakazara rinorukwa nesimbi yesimbi uye zvidimbu zvejecha, zvichiita kuti simbi yese ive yakapfava uye ine simba, uye panguva imwe chete zvichiita kuti simbi yese ive netiweki inonamira nekuzadza capillaries nemakomba. Nokudaro, firimu repolymer rinogona kuendesa kumanikidzwa uye kusimba kwe elastic. Firimu repolymer rinogona kubatanidza zvidimbu zvekupwanyika pa polymer-mortar interface, kuporesa zvidimbu zvekupwanyika, uye kuvandudza kusimba kwesimbi. Kuvapo kwe polymer domains dzinochinjika uye dzakasimba kunovandudza kuchinjika uye kusimba kwesimbi, zvichipa kubatana uye maitiro anochinja kumapfupa akaomarara. Kana simba rekunze rikashandiswa, maitiro ekuparadzira zvidimbu zve microcrack anononoka nekuda kwekuchinjika uye kusimba kwakavandudzwa kusvika zvasvika pakumanikidzwa kwakanyanya. Nzvimbo dzepolymer dzakasanganiswa dzinoshandawo sechipingamupinyi pakuwirirana kwe microcracks mu zvidimbu zvinopinda. Nokudaro, upfu hwepolymer hunonyungudika hunovandudza kushushikana kwekukundikana uye kusimba kwekukundikana kwezvinhu.
Nguva yekutumira: Kurume-10-2023