Kodi mukudziwa zomwe zili mu konkriti?

Zigawo zazikulu za konkriti ndi simenti (kuphatikizapo zinthu zolimbitsa simenti monga ufa wa mchere, phulusa la ntchentche, ndi zina zotero), zinthu zosakaniza (mchenga, miyala, ceramsite, ndi zina zotero), madzi, ndi zosakaniza.

Mawu akuti konkire nthawi zambiri amatanthauza konkire ya simenti ngati zinthu zomangira simenti, mchenga ndi miyala ngati zinthu zomangira; imasakanizidwa ndi madzi (omwe angakhale ndi zinthu zosakaniza ndi zosakaniza) mu gawo linalake, ndipo konkire ya simenti yomwe imapezeka posakaniza imatchedwanso konkire wamba. Konkire, yomwe imagwiritsidwa ntchito kwambiri muuinjiniya wa zomangamanga.

Konkireti ili ndi zinthu zambiri zopangira, mitengo yotsika, komanso njira yosavuta yopangira, kotero kugwiritsidwa ntchito kwake kukuwonjezeka. Nthawi yomweyo, konkireti ilinso ndi mphamvu yolimba kwambiri, kulimba bwino, komanso mitundu yosiyanasiyana ya mphamvu.

Makhalidwe amenewa amachititsa kuti igwiritsidwe ntchito kwambiri, osati mu uinjiniya wa zomangamanga zokha komanso pakupanga zombo, makampani opanga makina, chitukuko cha za m'madzi, uinjiniya wa kutentha kwa nthaka, ndi zina zotero. Konkire ndi chinthu chofunikira kwambiri.

Mu konkire, mchenga ndi miyala zimagwira ntchito ya mafupa, omwe amatchedwa aggregate; simenti ndi madzi amapanga slurry ya simenti, ndipo slurry ya simenti imaphimba pamwamba pa aggregate ndikudzaza malo ake. Asanayambe kuuma, grout imagwira ntchito yopaka mafuta, zomwe zimapangitsa kuti chisakanizocho chigwire ntchito bwino komanso kuti chimange mosavuta. Pambuyo poti simenti yauma, aggregate imapangidwa kukhala chinthu cholimba.

Kusankha mtundu wa simenti kuyenera kugwirizana ndi mtundu wa mphamvu ya konkire. Mwachidule, konkire yamphamvu kwambiri imakonzedwa, ndipo simenti yapamwamba imagwiritsidwa ntchito; konkire yamphamvu yochepa ikakonzedwa, simenti yamphamvu kwambiri imasankhidwa.

Ngati pakufunika kugwiritsa ntchito simenti yapamwamba pokonza konkriti yolimba kwambiri, kuchuluka kwa simenti kudzakhala kochepa kwambiri, zomwe zingakhudze kugwira ntchito bwino komanso kukhuthala, kotero kuchuluka kwa zinthu zosakanikirana kuyenera kuwonjezedwa. Ngati pakufunika kugwiritsa ntchito simenti yolimba kwambiri pokonza konkriti yolimba kwambiri, kuchuluka kwa simenti kudzakhala kwakukulu kwambiri, zomwe sizotsika mtengo ndipo zidzakhudzanso zinthu zina zaukadaulo za konkriti.