Tsiku Lotumiza: 13, Sep, 2022
Zopindulitsa kwambiri zamakono ndi zachuma za mpweya-entraining wothandizira ntchito malonda konkire
Air-entraining admixture ndi chophatikizika chomwe chimatha kutulutsa tinthu tating'onoting'ono tating'ono, wandiweyani komanso wosasunthika tikasakanikirana mu 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 wothandizira mpweya kumachepetsanso 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% mutatha kuwonjezera 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 ya konkire sadzakhala kuchepa, koma adzawonjezeka. Kuti muwongolere zomwe zili mumlengalenga, mayeso ambiri awonetsa kuti mpweya wa konkriti wocheperako umayendetsedwa ndi 5%, konkire yapakati-mphamvu 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 amadzimadzi kuchepetsa wothandizira akhoza kuchepetsedwa kwambiri, ndipo phindu lachuma ndi lalikulu.
Nthawi yotumiza: Sep-14-2022
