Girazi rinodziya/Rakasimbiswa girazi igirazi rekuchengetedza.Girazi rakapfava imhando yegirazi rakadzvanywa.Kuti uvandudze simba regirazi, kemikari kana nzira dzemuviri dzinowanzoshandiswa kuumba compressive stress pamusoro pegirazi.Apo girazi rinoiswa pasi pesimba rekunze, rinotanga kubvisa kushushikana kwepamusoro, nokudaro kuvandudza simba rekutakura uye kuwedzera kupikisa kwegirazi pachayo.Mhepo kudzvinyirirwa, kutonhora uye kupisa, kukanganisa, etc. Teerera kusiyanisa kubva kune girazi fiber yakasimbiswa plastiki.
uswa
Girazi is an amorphous inorganic non-metallic material, inowanzo gadzirwa nemhando dzakasiyana-siyana dzezvicherwa (sejecha requartz, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) ye.Zvikamu zvaro zvikuru ndeye silica uye mamwe maokisi.Mushonga wekemikari wegirazi rakajairwa ndiNa2SiO3, CaSiO3, SiO2 kana Na2O · CaO · 6SiO2, nezvimwewo. Chinhu chikuru chinonzi silicate kaviri munyu, inova amorphous solid ine random structure.Inoshandiswa zvakanyanya muzvivako kuvhara mhepo uye chiedza, uye ndeyemusanganiswa.Kune zvakare girazi reruvara rakasanganiswa nemaokisi kana munyu weimwe simbi kuratidza ruvara, uye girazi rinodziya rinowanikwa nenzira dzemuviri kana makemikari.Mapurasitiki akajeka akadai sepolymethyl methacrylate dzimwe nguva anonzi magirazi ekugadzirwa kwekurima.
prestress
Prestressing force ndiyo compressive stress pre-yakaiswa kune chimiro panguva yekuvaka kuitira kuvandudza mashandiro ebasa rechimiro.Munguva yenguva yebasa rechimiro, iyo prestressing stress inogona kudzikamisa zvizere kana zvishoma zvishoma kushushikana kunokonzerwa nemutoro uye kudzivirira kukuvadzwa kwechimiro.Inowanzo shandiswa muzvimiro zvekongiri, ndeyekuisa kumanikidza kune kongiri chimiro pachine nguva isati yatakura mutoro, kuitira kuti simba remukati rekongiri munzvimbo inorema kana mutoro wekunze uchiita kuburitsa kudzvinyirira, kumisa kana kuderedza tensile stress inogadzirwa nemutoro wekunze, kuitira kuti chimiro Icho chisatsemuka kana kutsemuka kunonoka pasi pekushandisa kwakajairika.
Nguva yekutumira: Mar-31-2022