Tsiku Lotumiza: 30, Sep, 2024
(5) Wothandizira mphamvu zoyambirira komanso wochepetsera mphamvu yamadzi
Zina zimawonjezedwa mwachindunji ngati ufa wouma, pamene zina ziyenera kusakanizidwa muzitsulo ndikugwiritsidwa ntchito motsatira malangizo ogwiritsira ntchito. Ngati zimasakanizidwa mu mawonekedwe a ufa wouma, ziyenera kukhala zowuma-zosakaniza ndi simenti ndikuphatikizana poyamba, kenaka yikani madzi, ndipo nthawi yosakaniza sayenera kukhala osachepera 3 mphindi. Ngati agwiritsidwa ntchito ngati yankho, madzi otentha pa 40-70 ° C angagwiritsidwe ntchito kuti afulumizitse kusungunuka. Pambuyo kuthira, iyenera kuphimbidwa ndi filimu ya pulasitiki kuti ichiritsidwe. Pamalo otsika kutentha, iyenera kuphimbidwa ndi zinthu zoziziritsa kukhosi. Pambuyo pomaliza, iyenera kuthiriridwa ndi kunyowa nthawi yomweyo kuti ichiritsidwe. Pamene kuchiritsa kwa nthunzi kumagwiritsidwa ntchito pa konkire yosakanikirana ndi yoyambira mphamvu, njira yochizira nthunzi iyenera kutsimikiziridwa kudzera muzoyesera.
(6) Antifreeze
Antifreeze ali ndi kutentha kwapadera kwa -5°C, -10°C, -15°C ndi mitundu ina. Mukaigwiritsa ntchito, iyenera kusankhidwa molingana ndi kutentha kwatsiku ndi tsiku. Konkire wosakanizidwa ndi antifreeze ayenera kugwiritsa ntchito simenti ya Portland kapena simenti wamba ya Portland yokhala ndi mphamvu yosachepera 42.5MPa. Kugwiritsa ntchito simenti yayikulu ya alumina ndikoletsedwa. Chloride, nitrite ndi nitrate antifreezes ndizoletsedwa kuti zigwiritsidwe ntchito pamapulojekiti a konkire. Zopangira konkriti ziyenera kutenthedwa ndikugwiritsidwa ntchito, ndipo kutentha kwa chosakaniza sikuyenera kutsika 10 ° C; kuchuluka kwa antifreeze ndi kuchuluka kwa simenti yamadzi kuyenera kuyendetsedwa mosamalitsa; nthawi yosakaniza iyenera kukhala yotalikirapo 50% kuposa kutentha kwanthawi zonse. Pambuyo kuthira, iyenera kuphimbidwa ndi filimu ya pulasitiki ndi zipangizo zotetezera, ndipo musalole kuthirira kuyenera kuloledwa panthawi yokonza kutentha koipa.
(7)Wowonjezera wothandizira
Asanamangidwe, kusakaniza koyesa kuyenera kuchitidwa kuti mudziwe mlingo wake ndikuwonetsetsa kuti kukula kolondola. Kusakaniza kwamakina kuyenera kugwiritsidwa ntchito, nthawi yosakaniza siyenera kukhala yochepera mphindi 3, ndipo nthawi yosakaniza iyenera kukhala masekondi 30 kuposa ya konkire popanda zosakaniza. Konkire yolipiritsa shrinkage iyenera kugwedezeka mwamakina kuti iwonetsetse kulimba; kugwedezeka kwamakina sikuyenera kugwiritsidwa ntchito podzaza konkire yokulitsa ndi kutsika pamwamba pa 150mm. Konkire yokulirapo iyenera kuchiritsidwa m'malo achinyezi kwa masiku opitilira 14, ndipo yotsirizirayo iyenera kuchiritsidwa ndi kupopera mbewu mankhwalawa.
(8)Chithandiziro chofulumira
Mukamagwiritsa ntchito zowongolera zofulumizitsa, chidwi chonse chiyenera kuperekedwa pakusinthika kwa simenti, ndipo mlingo ndi momwe amagwiritsidwira ntchito ziyenera kumveka bwino. Ngati zomwe zili mu C3A ndi C3S mu simenti ndizokwera, chisakanizo cha konkriti cha accelerator chiyenera kuthiridwa kapena kupopera mkati mwa mphindi 20. Konkire ikapangidwa, iyenera kukhala yonyowa ndikusungidwa kuti ipewe kuyanika ndi kusweka.
Nthawi yotumiza: Oct-09-2024
