Tsiku Lotumiza: 13, Sep, 2022
Zopindulitsa kwambiri zamakono ndi zachuma za wothandizira mpweya wogwiritsidwa ntchito mu konkire yamalonda
Air-entraining admixture ndi chophatikizika chomwe chimatha kutulutsa tinthu tating'onoting'ono tating'ono, wandiweyani komanso wosasunthika tikasakanikirana ndi konkriti.Kukhalitsa monga kukana chisanu ndi kusakwanira.Kuwonjezera mpweya-entraining wothandizila kuti malonda konkire angalepheretse adsorption yachiwiri ya omwazika particles simenti mu konkire ndi kusintha kugwa posungira ntchito konkire malonda.Pakali pano, mpweya-entraining wothandizira ndi chimodzi mwa zinthu zofunika kwambiri pa malonda konkire admixture (ena ndi madzi reducer ndi retarder).Ku Japan ndi mayiko akumadzulo, palibe pafupifupi konkire popanda mpweya-entraining wothandizira.Mu Japan, konkire popanda mpweya-entraining wothandizira amatchedwa wapadera konkire (monga permeable konkire, etc.).
Air-entraining idzakhudza mphamvu ya konkire, yomwe imatanthawuza zotsatira za mayesero pansi pa chikhalidwe cha konkire ndi madzi-simenti.Pamene mpweya ukuwonjezeka ndi 1%, mphamvu ya konkire idzachepetsedwa ndi 4% mpaka 6%, ndipo kuwonjezera kwa mpweya wopangira mpweya kudzachepetsanso mphamvu ya konkire.Kuchuluka kwa madzi kumawonjezeka kwambiri.Zayesedwa ndi naphthalene-based superplasticizer.Pamene mlingo wochepetsera madzi wa konkire ndi 15.5%, mlingo wochepetsera madzi wa konkire umafika kupitirira 20% pambuyo powonjezera pang'ono kwambiri wothandizira mpweya, ndiko kuti, kuchepetsa madzi kumawonjezeka ndi 4.5%.Pakuwonjezeka kulikonse kwa madzi 1%, mphamvu ya konkire idzawonjezeka ndi 2% mpaka 4%.Choncho, bola kuchuluka kwa mpweya-entraining
wothandizila mosamalitsa ankalamulira, osati mphamvu konkire sadzakhala kuchepa, koma adzawonjezeka.Kuti muwongolere zomwe zili mumlengalenga, mayeso ambiri awonetsa kuti mpweya wa konkriti wochepa mphamvu umayendetsedwa pa 5%, konkire yamphamvu yapakatikati imayendetsedwa pa 4% mpaka 5%, ndipo konkriti yamphamvu kwambiri imayendetsedwa pa 3. %, ndipo mphamvu ya konkire sidzachepetsedwa..Chifukwa mpweya-entraining wothandizira ali ndi zotsatira zosiyana pa mphamvu ya konkire ndi osiyana madzi-simenti ziŵerengero.
Poganizira za kuchepetsa madzi a air-entraining wothandizira, pokonzekera malonda konkire admixture, mayi wamadzimadzi wa madzi kuchepetsa wothandizira akhoza kuchepetsedwa kwambiri, ndipo phindu lachuma ndi lalikulu.
Nthawi yotumiza: Sep-14-2022