Tsiku Lotumiza:31,Oct,2022
Zosakaniza za konkritiakhala akugwiritsidwa ntchito mu konkire kwa zaka pafupifupi zana ngati chinthu.Koma kuyambira kalekale, anthu akhala akudziwa kale kugwiritsa ntchito zinthu zina pomanga zinthu za simenti.Deta yotsimikiziridwa imalemba kuti mu 1885 anthu a ku Ulaya adadziwa kale kuti olamulira owumitsa, monga laimu ndi gypsum, adawonjezeredwa ku konkire.Kumapeto kwa zaka za m'ma 1800, kugwiritsa ntchito calcium chloride kunali koopsa ndipo kukugwiritsidwabe ntchito mpaka pano.Pofika m'chaka cha 1895, zowonjezera madzi ndi mapulasitiki zidawonjezeredwa ku konkire yokonza misewu, zomwe zinapangitsa kuti konkire ikhale yolimba.
Zogulitsa zamafakitale zokhazikika zidawonedwa koyamba mu 1910. Pamene North America idapangidwa ku United States m'ma 1930, miyala ya konkire idaundana mwachangu chifukwa cha nyengo yozizira kwambiri.Pofuna kupititsa patsogolo konkire yapabwalo, "vinsa resin" idagwiritsidwa ntchito kuti konkriti ikhale yolimba.kugonana.The kwenikweni sayansi kafukufuku mankhwala ndi "Pozzolitn" madzi kuchepetsa wothandizila (Pozzolitn), amene bwinobwino kafukufuku ndi kupanga ndi EW Scxiptrt wa MasterBuilder wa United States mu 1935, amene makamaka wapangidwa lignosulfonate mu zamkati zinyalala zamadzimadzi.Mu 1937, United States idapereka chilolezo choyamba chochepetsera madzi m'mbiri.Mu 1954, gulu loyamba la miyezo yoyesera yakonkriti zosakanizazidapangidwa.
Kugwiritsa ntchito mwalamulo kwakonkriti zosakanizam’dziko langa munali m’ma 1950.Panthawiyo, rosin saponified air-entraining agent yopangidwa ndi akatswiri ochokera kumayiko omwe kale anali Soviet Union adayambitsidwa.Idagwiritsidwa ntchito ku Tianjin Tanggu New Port, Wuhan Yangtze River Bridge ndi Foziling Reservoir, ndipo idapeza zotsatira zina.Pambuyo pake, mapulasitiki opangira konkriti omwe amagwiritsa ntchito zinyalala zamadzimadzi kuchokera pakupanga mapepala a sulfite ndi uchi wotayika kuchokera kumakampani a shuga monga zida zidagwiritsidwa ntchito.Kugwiritsiridwa ntchito kwa admixtures kunayambiranso pamenepo.
Kukula ndi kugwiritsa ntchitokonkriti zosakanizaali ndi tanthauzo la nthawi yayitali.Kukulitsa ndi kulimbikitsa kugwiritsa ntchito mwamphamvukonkriti zosakanizandi njira yofunikira yolimbikitsira kupita patsogolo kwasayansi pantchito yomanga.
Pomanga ntchito zomanga, kugwiritsa ntchito zosakaniza zimatha kukonza bwino malo omanga, kuthandizira kugwiritsa ntchito zida zamakina osiyanasiyana, kuchepetsa kuchuluka kwa ogwira ntchito yomanga, ndikuwonetsetsa kuti ntchitoyo ndi yabwino.Kuphatikiza apo, itha kugwiritsidwanso ntchito pazovuta zina.Malizitsani bwino ntchito zomanga m'chilengedwe.
The admixture konkire akhoza kwambiri kufupikitsa yokonza nthawi pambuyo yomanga ntchito, potero kufulumizitsa demoulding liwiro la polojekiti, kupanga formwork kutembenuka mofulumira, ndipo ali ndi chidwi kwambiri liwiro-mmwamba zotsatira lotsatira kulimbikitsa tensioning ndi kumeta ubweya, kupanga nthawi yonse yomanga projekiti.ofupikitsidwa kwambiri.Pa nthawi yomweyo, kuwonjezerakonkriti zosakanizaimathanso kukonza bwino ntchito yonse ya konkire, ndikuwongolera mphamvu zake, kulimba, kukana chisanu, komanso kusakwanira.
Komanso, akhoza kwambiri kusintha shrinkage konkire pamene youma mokwanira ndi otaya katundu pamaso solidification.Ngati kusakaniza konkire kumagwiritsidwa ntchito moyenera mu ntchito yomanga, kusakaniza sikudzakhala ndi zotsatirapo pa zomangamanga za konkire, komanso kumachepetsanso kwambiri kugwiritsa ntchito simenti ndi zipangizo zosiyanasiyana zothandizira pogwiritsira ntchito sayansi, ndi kuchepetsa kugwiritsidwa ntchito kwa zipangizo zothandizira zopangira simenti sikungopulumutsa anthu, komanso kupulumutsa ndalama zomanga ndondomekoyi, ndipo zimakhala ndi zotsatira zabwino pamasitepe otsatirawa.The tamping ndi troweling ndondomeko amapereka mosavuta.
Nthawi yotumiza: Oct-31-2022