Kuramba kutsemuka Kushandiswa kwekongiri face slab kwakakosha zvikuru pakushanda kwedhamu rekongiri rakatarisana nematombo (CFRD). Migumisiro ye dota renhunzi,MgO expansive agent, uye shrinkage-reducing admixture (SRA) pahunhu hwemakanika, dryinkage uye crack resistance ye face slab concrete zvinodzidzwa uye zvinoenzaniswa nereference concrete. Zvakabuda zvinoratidza kuti kuwedzera 20% fly ash (nehuremu hwebinder) kunowedzera simba rekongiri pazera rekupedzisira. Kusiyana neizvi, kuwedzera 6%MgO expansive agent kana 1%SRA kunoderedza simba rekudzvanya, zvichiparadzanisa simba rekudzvanya uye kupedzisira kudzvanya kusvika padanho rakati pazera rakasiyana. Kubatanidzwa kwe20% fly ash, 6%MgO expansive agent, uye 1%SRA kunogona kuderedza dry shrinkage pazera rakasiyana uye kuvandudza resistance yekutanga yekupwanya kongiri, nepo kuiswa kwe6%MgO expansive agent kuri nani pakudzivisa kukura kwekupwanya uye kuvandudza resistance yekongiri pane kuwedzera 20% fly ash kana 1%SRA.
Dhamu reConcrete face rockfill (CFRD) idhamu rekuisa matombo rine dombo sesimba guru uye chiso checoncrete chepamusoro semuviri mukuru usinganyungudike. Nekuda kwehunhu hwaro hwekuchengetedzeka kwakanaka, kugona kuchinjika kwakasimba, nguva pfupi yekuvaka uye mutengo wakaderera, madhamu ekuisa matombo econcrete face rockfill ave mamwe emhando dzemadhamu anoshandiswa zvakanyanya mukugadzira dhamu. Madhamu econcrete akajairika akatetepa uye akafanana nezvidimbu izvo zvinowanzotsemuka nekuda kwekuchinja kwekushisa, kushanduka kwehuwandu uye kugara kwenheyo yedhamu. Kune muviri wedhamu, kana paine mutswe mumeso econcrete, zvinoparadza kusimba uye kugara kwenguva refu kwechimiro chemuviri wedhamu, uye mutswe unokonzerwa nekutsemuka kweplate yeface unogona kubvumira mvura yekunze kupinda muconcrete, izvo zvinokonzera zvakananga kubuda kwemuviri wedhamu. Naizvozvo, kuvandudza kuramba kwemutswe kwedhamu rekuisa matombo econcrete inyaya yakakosha ine chekuita nekushanda kwakachengeteka kwedhamu rekuisa matombo econcrete face rockfill. Maitiro einjiniya netsvagiridzo dziripo pari zvino zvinoratidza kuti matanho makuru ehunyanzvi ekuvandudza kuramba kupwanyika kwekongiri yepamberi anosanganisira kudzora mhando yezvinhu zvakagadzirwa nekongiri, kugadzirisa chiyero chemusanganiswa wekongiri, kuwedzera dota remhepo uye kuwedzera huwandu hwakakodzera hwemafiber. Zvikamu zvikuru zvekongiri yekuderedza kupwanyika kwekongiri rudzi rwepolyalcohol kana polyether organic compounds uye zvinobva mairi. Zvidzidzo zvakaratidza kuti kuwedzera kwechinhu chinoderedza kupwanyika kwekongiri kunogona kuderedza kushushikana kwepamusoro pemvura yekongiri, nokudaro kuderedza kushushikana kunokonzerwa nekupwanyika kwekongiri kana macapillary pores arasikirwa nemvura, uye kuvandudza kuramba kupwanyika kwekongiri kusvika pamwero wakati. Kuwedzera kwechinhu chinosimudzira MgO panguva yekugadzirira kongiri inzira yakajairika yekudzora kupwanyika. Sezvo chinhu chinosimudzira MgO chichizoburitsa kuwedzera kwehuwandu panguva yekuisa kongiri uye kuoma kwayo, chinogona kutsiva kupwanyika kwekongiri, kusanganisira kudzikira kwekushisa, kudzikira kwekuomesa uye kudzikira kwega, nokudaro zvichideredza kuitika kwekupwanyika kwekongiri. Parizvino, chinhu chinosimudzira MgO chakashandiswa zvinobudirira kukongiri yechiteshi chemagetsi emvura uye chakawana mhedzisiro yakanaka yekudzivirira kupwanyika. Zvisinei, pane zvidzidzo zvishoma pamusoro pemhedzisiro yekuderedza kupwanyika uye MgO expansion agent pakudzivirira kupwanyika kwekongiri yechiso.
Nguva yekutumira: Kurume-09-2022