Ufa wa putty umagwiritsidwa ntchito makamaka pakuwongolera ndi kukonza makoma panthawi yomanga. Komabe, ufa wamwambo wa putty umakonda kusungunuka ndi kufewetsa ukakhala ndi madzi, zomwe zimakhudza mtundu wa zomangamanga komanso moyo wautumiki wa nyumbayo. Hydroxypropyl methylcellulose (HPMC), monga chowonjezera chofunikira, chingathe kusintha kwambiri kukana kwa madzi kwa putty powder.
1. Chemical katundu ndi ntchito zofunika za HPMC
Hydroxypropyl methylcellulose (HPMC) ndi ether yopanda ionic cellulose yokhala ndi ntchito zosiyanasiyana monga kukhuthala, kupanga filimu, kukhazikika, ndi kunyowetsa. Amagwiritsidwa ntchito kwambiri pomanga, mankhwala, chakudya ndi minda ina. Maselo a HPMC ali ndi magulu a hydrophilic hydroxyl (-OH) ndi magulu a hydrophobic hydrocarbon (-CH3, -CH2-), kuwapatsa madzi abwino kusungunuka ndi kukhazikika. Zinthu izi zimathandiza HPMC kupanga njira zokhazikika za colloidal m'madzi ndikupanga mawonekedwe owoneka bwino a netiweki panthawi yochiritsa, potero kuwongolera mawonekedwe azinthuzo.
2. Njira yopititsira patsogolo kukana madzi
2.1. Makulidwe zotsatira
HPMC ikhoza kuonjezera kwambiri kukhuthala kwa putty powder slurry, kulola kuti slurry apange dongosolo lokhazikika loyimitsidwa m'madzi. Kumbali imodzi, kukhuthala kumeneku kumapangitsa kuti ntchito yomanga slurry ikhale yabwino ndikuchepetsa zochitika za delamination ndi magazi; Komano, popanga viscous slurry, HPMC imachepetsa kulowetsedwa kwa mamolekyu amadzi, potero kumapangitsa kuti ufa wa putty ukhale wabwino. Kukana madzi pambuyo pochiritsa.
2.2. Mafilimu opanga mafilimu
Pakuchiritsa kwa ufa wa putty, HPMC ipanga filimu wandiweyani pakati pa simenti, madzi ndi zosakaniza zina. Nembanemba imeneyi imakhala ndi mpweya wochepa wa madzi ndipo imatha kulepheretsa chinyezi kulowamo. Kanema wopangidwa ndi HPMC amathanso kuwongolera mphamvu zamakina ndi kukana kwa zinthuzo, kupititsa patsogolo kukana kwamadzi kwa ufa wa putty.
2.3. Limbikitsani kukana kwa crack
Mwa kukonza zotanuka modulus ndi shrinkage katundu wa putty ufa, HPMC akhoza bwino kuchepetsa chiopsezo chosweka chifukwa chouma shrinkage ndi kutentha kusintha. Kuchepetsa kuchitika kwa ming'alu kumathandizanso kukana madzi a putty powder, chifukwa ming'alu idzakhala njira zazikulu zolowera madzi.
2.4. Kuwongolera kwa hydration reaction
HPMC ikhoza kuchedwetsa hydration reaction rate ya simenti, kulola kuti ufa wa putty ukhale ndi nthawi yotalikirapo kuti udzichiritse komanso kuchulukitsa panthawi yowumitsa. Kuthamanga kwapang'onopang'ono kumathandizira kupanga mawonekedwe ang'onoang'ono, potero amachepetsa porosity ya ufa wa putty ndikupangitsa kuti zinthuzo zisalowe m'madzi.
3. Kugwiritsa ntchito kwa HPMC mu putty powder
3.1. Limbikitsani ntchito yomanga
HPMC imakulitsa mawonekedwe a rheological a putty slurry, kupangitsa kukhala kosavuta kwa ogwira ntchito yomanga kuti agwire ntchito zopalasa ndi zosalala. Chifukwa cha kukhuthala kwake komanso kusunga madzi, ufa wa putty ukhoza kukhalabe wonyowa bwino ukagwiritsidwa ntchito, kuchepetsa kuchitika kwa ming'alu yowuma ndikuwongolera zomangamanga.
3.2. Limbikitsani mphamvu zamakina azinthu zomalizidwa
Putty ufa wowonjezeredwa ndi HPMC uli ndi mphamvu zamakina apamwamba komanso kumamatira pambuyo pochiritsa, kuchepetsa kuthekera kwa kusweka ndi kusenda. Izi zimathandizira kwambiri kukongola konse komanso kulimba kwa nyumbayo.
3.3. Limbikitsani kukana kwamadzi kwa zokutira komaliza
Kuyesera kumasonyeza kuti mphamvu ya putty powder yowonjezeredwa ndi HPMC imachepa pang'ono pambuyo poviikidwa m'madzi, ndipo imasonyeza bwino kukana kwa hydrolysis ndi kukhazikika. Izi zimapangitsa ufa wa putty kugwiritsa ntchito HPMC kukhala woyenera pazomangamanga m'malo achinyezi.
4. Njira zodzitetezera
Ngakhale HPMC imakhudza kwambiri kukana madzi a putty powder, mfundo zotsatirazi ziyenera kuzindikirika m'ntchito zothandiza:
4.1. Sankhani mlingo moyenera
Mlingo wa HPMC uyenera kusinthidwa moyenerera malinga ndi chilinganizo ndi zofunikira zomanga za putty powder. Kugwiritsa ntchito mopitirira muyeso kungayambitse slurry kukhala viscous kwambiri, kukhudza ntchito yomanga; Kugwiritsa ntchito kosakwanira sikungakhudze kukhuthala kwake komanso kupanga mafilimu.
4.2. Synergy ndi zina zowonjezera
HPMC nthawi zambiri amagwiritsidwa ntchito limodzi ndi ma cellulose ethers, latex powder, plasticizers ndi zina zowonjezera kuti akwaniritse zotsatira zabwino kwambiri. Kusankha koyenera ndi kufananitsa zowonjezera izi zitha kukulitsa magwiridwe antchito onse a putty powder.
4.3. Lamulirani kutentha kozungulira ndi chinyezi
Makhalidwe osungira madzi a HPMC amatha kukhudzidwa akagwiritsidwa ntchito kumalo otentha kwambiri kapena malo otsika. Kumanga kuyenera kuchitidwa pansi pa kutentha koyenera ndi chinyezi momwe zingathere, ndipo chidwi chiyenera kuperekedwa kusunga chinyezi cha slurry.
HPMC imathandizira bwino kukana kwamadzi kwa ufa wa putty kudzera munjira zingapo monga kukhuthala, kupanga filimu, kuwongolera kukana kwa ming'alu ndikuwongolera kachitidwe ka hydration, kulola kuti iwonetse kukhazikika komanso kukhazikika m'malo achinyezi. Izi sizimangowonjezera ubwino ndi luso la zomangamanga, komanso zimawonjezera moyo wautumiki wa nyumbayo. Muzogwiritsira ntchito, kusankha koyenera ndi kugwiritsa ntchito HPMC ndi zina zowonjezera zimatha kupititsa patsogolo ntchito ya putty powder ndikupeza zotsatira zomanga zapamwamba.
Nthawi yotumiza: Jun-26-2024