1. Kutentha kwa hydration
Malinga ndi kumasulidwa kwa kutentha kwa hydration kwakanthawi, njira zamapulogalamu ya simenti nthawi zambiri zimagawika m'magawo asanu (4h ~ 4h), ndi nthawi ya 4h), ndi 1d).
Zotsatira zoyeserera zikuwonetsa kuti kumayambiriro kwa gawo loyambirira (mwachitsanzo, nthawi yoyambirira yotulutsa), pomwe kuchuluka kwa hemc ndi 0,1% kutalika kwa slurry kulipamwamba ndipo chimakhala chowonjezerekacho chimawonjezeka kwambiri. Kuchuluka kwaHemoKuchulukana mpaka pakadali pano. Hemc idzazengereza nthawi yayitali komanso nthawi yayitali ya simenti slorry, ndipo zokulirapo, nthawi yolowera, nthawi yofulumira kwambiri, komanso yaying'ono kwambiri. Kusintha kwa cellulose ether ether sikuwonekera kutalika kwa nthawi yosinthira kwa simenti, monga momwe zimawonekera kwa maola 32, koma kutentha kwa cellulose kumatha nthawi yayitali 3 (b).
Kusinthika kwa mkuyu wamtundu wa nkhuyu
2. Mkatundu wambiri:
Pophunzira mitundu iwiri ya cellose yosiyanasiyana ya anthu 600000000000000akulu, inali mphamvu yovuta ya matope osakanikirana ndi methyl cellulose imazirala. The compressive strength of the modified mortar mixed with 100000Pa·s viscosity hydroxypropyl methyl cellulose ether increases first and then decreases with the increase of its content (as shown in Figure 4). Zikuwonetsa kuti kuphatikiza kwa methyl cellulose ether ether kumachepetsa kwambiri kulimba kwa matope a simenti. Kuchuluka kwake, mphamvu zake zidzakhala; Zocheperako zikuwoneka, zomwe zimapangitsa kuti anthu atasungunuke kwambiri. Hydroxypylm methy cellulose ether pomwe mlingowo ndi wochepera 0.1%, mphamvu yovuta kwambiri ya matope ikhoza kuwonjezeka bwino. Mlingo wopitilira 0,1%, mphamvu yovuta kwambiri ya matope imachepera ndi kuchuluka kwa mlingo, kotero mlingo uyenera kulamulidwa pa 0.1%.
Mkuyu.4 3D, 7D ndi 28D Compressiyi yopondereza ya MC1, MC2 ndi MC3 yosinthidwa matope a simenti
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3. Cnthawi yopumira:
Poyesa kukhazikitsa nthawi ya hydroxypypyl etherllulose muyezo wosiyanasiyana wa milingo ya simenti, itapezeka kuti ndikumaliza matope a simenti kale. Pamene ndende ili 1%, nthawi yoyamba ifika mphindi 510, ndipo nthawi yotsiriza ifika mphindi 850. Poyerekeza ndi chiwonetsero chopanda kanthu, nthawi yoyambira imakulitsidwa ndi mphindi 210, ndipo nthawi yomaliza imakulitsidwa ndi mphindi 470 (monga tikuonera Chithunzi 5). Kaya ndi HPMC yokhala ndi mafayilo a 50000Pa S kapena 200000Pa, nthawi yotsiriza ndi nthawi yomaliza imayamba kukula kwa Chithunzi, monga tikuonera. Izi ndichifukwa choti cellulose ether imayesedwa pamwamba pa simenti tinthu tambiri, zomwe zimalepheretsa madzi ndi tinthu tating'onoting'ono, motero kuchedwa kwa simenti. Kukula kwa cellulose ether ether, wokulirapo madsororption osanjikiza pa simenti, komanso chofunikira kwambiri.
Mkuyu.5 za cellulose ether ether pa kukhazikitsa nthawi ya matope
Mkuyu.6 zotsatira za ma viscosies osiyanasiyana a hpmc pa nthawi yanthawi ya simenti
(MC-5 (500000000000000000000000000 (100000Pe) ndi MC-20 (200000Pe))
Methyl cellulose ether ndi hydroxypropyl celyl cellulose ethel ethel ethelose ethel ethel ethel ethel ethel ethel ethel etherry agwera nthawi yolimba, ndikuthetsa vuto la simenti atalimbana. Vuto losokoneza.
4. Kusunga kwamadzi:
Mphamvu ya zopezeka pa cellulose pa kusungidwa kwamadzi kunawerengedwa. Amapezeka kuti ndi kuchuluka kwa zomwe zili ndi ma cellulose, malo osungira madzi a matope amawonjezeka, ndipo pomwe zosunga za cellulose ndizoposa 0,6%, kuchuluka kwa madzi kumakhala kokhazikika. Komabe, poyerekeza mitundu itatu ya cellulose et (hpmc yokhala ndi mawonekedwe a 5000000Pa s (MC-5), 10000Pa S (MC-10)) Ubwenzi wapakati pa kusunga madzi ndi: MC-5.
Post Nthawi: Apr-282024