Tsiku Lotumiza: 15 Apr, 2024
Kuwunika kwa ntchito ya konkriti admixtures:
Konkire admixture ndi mankhwala owonjezera panthawi yokonzekera konkire. Ikhoza kusintha maonekedwe a thupi ndi ntchito yogwira ntchito ya konkire, potero kukhathamiritsa ntchito ya konkire. Choyamba, zosakaniza za konkire zimagwira ntchito yofunika kwambiri pakuwongolera zinthu za konkriti. Kumbali imodzi, imapangitsa kuti konkriti ikhale yolimba komanso yolimba. Mwa kuwonjezera kuchuluka koyenera kwa zosakaniza monga zolimbitsa zolimbitsa thupi ndi zoletsa, mphamvu yopondereza, mphamvu yolimba komanso kukana kwa konkriti kungathe kuonjezeredwa, ndipo mawonekedwe onse a konkire amatha kuwongolera. Kumbali inayi, imathanso kusintha kukana kwa mankhwala a konkire. Mwachitsanzo, kuwonjezera admixtures monga wothandizila madzi ndi zotetezera angathe kuchepetsa malowedwe a chinyezi ndi mankhwala mu konkire ndi kusintha durability ndi moyo utumiki wa konkire. Kachiwiri, zosakaniza za konkriti zimagwira ntchito yofunikira pakuwongolera magwiridwe antchito a konkriti. Kugwira ntchito kumatanthawuza pulasitiki, fluidity ndi kutsanulira konkriti panthawi yomanga. Powonjezera ma admixtures monga kuchepetsa madzi, tackifiers ndi plasticizers, fluidity ndi adhesion wa konkire angasinthidwe, kupanga kukhala plasticity bwino ndi fluidity, kupanga ntchito yomanga ndi kuthira mosavuta. Kuphatikiza apo, kuwonjezera zophatikizira monga othandizira chithovu cha mpweya ndi zolimbitsa thupi zimathanso kuwongolera zomwe zili kuwira komanso kukhazikika kwa konkriti kuti zigwirizane ndi zosowa zosiyanasiyana zamainjiniya.
Kafukufuku pamiyeso yeniyeni yogwiritsira ntchito konkriti zosakaniza:
(1) Kugwiritsa ntchito chochepetsera madzi
Malinga ndi momwe makina ochepetsera madzi amagwirira ntchito, mphamvu yake yochepetsera madzi ikuwoneka bwino, ndipo ili ndi malingaliro ochuluka aukadaulo. Ngati mukufuna kuonetsetsa slump wonse wa zipangizo konkire, ngati mungathe kuphatikiza ubwino wa wothandizila madzi kuchepetsa, mukhoza mogwira kuchepetsa kuchuluka kwa madzi konkire ntchito unit ndi kuchepetsa lonse madzi simenti chiŵerengero, potero kukwaniritsa cholinga chitukuko. kupititsa patsogolo mphamvu ya konkriti. Panthawi imodzimodziyo, kugwiritsa ntchito njira iyi kungathandizenso bwino kachulukidwe ndi kulimba kwa zipangizo za konkriti. Ngati madzi onse ogwiritsidwa ntchito pazinthu za konkire amakhalabe osasinthika, kuphatikizapo ubwino wa kuchepetsa madzi, madzi amadzimadzi a zinthu za konkire amatha kuwonjezereka. Ngakhale kusunga kukhazikika kwa mphamvu ya konkire, kugwiritsa ntchito zosakaniza zochepetsera madzi kungathenso kukwaniritsa cholinga cha chitukuko chochepetsera kugwiritsa ntchito simenti. Kuchepetsa ndalama zomangira zosafunikira komanso kuwononga ndalama. Pakalipano, mitundu yosiyanasiyana yochepetsera madzi yawonekera pamsika. Mitundu yosiyanasiyana yochepetsera madzi imakhala ndi kusiyana koonekeratu pakukula kwa ntchito ndi zotsatira zake. Ogwira ntchito ayenera kuzigwiritsa ntchito moyenera malinga ndi momwe zilili pa malo.
(2) Kugwiritsa ntchito mankhwala olimbikitsa oyambirira
Wothandizira mphamvu zoyamba ndizoyenera kwambiri pomanga m'nyengo yozizira kapena ntchito zokonzekera mwadzidzidzi. Ngati kutentha kwa malo omangako kukuwoneka kuti ndi kwakukulu, kapena kutentha kwatsika kuposa -5 ℃, kusakaniza kumeneku sikungagwiritsidwe ntchito. Pazinthu zazikulu za konkriti, kutentha kwakukulu kwa hydration kumatulutsidwa panthawi yogwiritsidwa ntchito, ndipo othandizira mphamvu zoyambilira sizoyenera kugwiritsidwa ntchito. Pakalipano, omwe amagwiritsidwa ntchito kwambiri poyambira mphamvu ndi sulphate oyambirira mphamvu wothandizira ndi chloride oyambirira mphamvu wothandizira. Pakati pawo, phindu lodziwikiratu ndi chlorine mchere woyambitsa mphamvu, womwe uli ndi sodium kolorayidi, calcium kolorayidi ndi zinthu zina. Pogwiritsa ntchito mphamvuyi yoyambirira, calcium chloride imatha kuchitapo kanthu ndi zigawo zofananira mu simenti, ndikuwonjezera gawo lolimba mumwala wa simenti, motero kulimbikitsa mapangidwe a miyala ya simenti. Mukamaliza zomwe zili pamwambazi, zimathanso kuchepetsa vuto la madzi ochuluka aulere mu konkire mu ntchito yachikhalidwe, kuchepetsa zotsatira za porosity, ndikukwaniritsadi zolinga zachitukuko za mphamvu zambiri komanso kachulukidwe kake. Tikumbukenso kuti chlorine mchere oyambirira mphamvu wothandizila mwina ndi zina zikuwononga dongosolo zitsulo pa ntchito. Poganizira vutoli, kusakaniza kotereku sikuli koyenera pa ntchito yomanga konkriti yokhazikika. Pakafukufuku wa sulphate oyambirira mphamvu zothandizira, sodium sulphate oyambirira mphamvu agent ndi omwe amagwiritsidwa ntchito kwambiri poyambira mphamvu. Potengera mawonekedwe ake, imakhala ndi mphamvu yolimbana ndi madzi. Ndipo ikasakanizidwa muzinthu za konkriti, imathanso kuphatikizika ndi zinthu zingapo za simenti, ndipo pamapeto pake imapanga hydrated calcium sulfoaluminate. Izi zikapangidwa, zimatha kupititsa patsogolo kuthamanga kwa simenti. Chloride mchere woyambitsa mphamvu ndi sulphate oyambirira-mphamvu wothandizira ndi inorganic mchere oyambirira-mphamvu wothandizira. Ngati ntchito yofananira ikufunika kuchitidwa pa kutentha kwakukulu, wothandizira woyambitsa mphamvuyo sangathe kugwiritsidwa ntchito. Pakugwiritsa ntchito kwenikweni, ogwira ntchito amayenera kuphatikizira mawonekedwe aothandizira osiyanasiyana oyambira mphamvu komanso momwe zinthu zilili pamalowo kuti asankhe wothandizira mphamvu woyambira woyenera kwambiri.
Nthawi yotumiza: Apr-17-2024
