Chochepetsa madzi cha polycarboxylate (PCE) mu simenti ya simenti

Chochepetsa madzi cha polycarboxylate(PCE)Ndi mbadwo watsopano wa chochepetsera madzi chogwira ntchito bwino kwambiri chomwe chimagwiritsidwa ntchito kwambiri komanso chimagwira ntchito bwino kwambiri pazinthu zamakono zopangidwa ndi simenti. Chimagwiritsidwa ntchito kwambiri popanga konkriti yosakanikirana kale, matope odziyimira pawokha, zida zolumikizira, matope okonza ndi konkriti yogwira ntchito kwambiri.

1. Njira yogwirira ntchito

Chochepetsa madzi cha Polycarboxylate ndi mtundu wa chinthu chosungunuka cha mamolekyulu ambiri chomwe chimadziwika ndi unyolo wa m'mbali wa polyether ndi unyolo waukulu wa carboxylic acid. Mphamvu zake zochepetsera ndi kufalitsa madzi zimachokera mbali ziwiri:

1.1. Kuthamangitsa kwamagetsi

Unyolo waukulu wa molekyulu ya Polycarboxylate water reducer uli ndi magulu ambiri a carboxyl (-COOH), omwe amasinthidwa kukhala ion m'malo a alkaline kuti apange ma carboxylate radicals (-COO⁻), omwe amamatiridwa pamwamba pa tinthu ta simenti, zomwe zimapangitsa kuti tinthu ta simenti tizikhala ndi mphamvu yofanana, motero timatsutsana ndikulimbikitsa kufalikira kwa tinthu ta simenti.

1.2. Zotsatira za Steric zolepheretsa

Ma unyolo am'mbali mwa polyether monga magulu a polyoxyethylene (PEO) amaletsa tinthu ta simenti kuti tisagwirizanenso kudzera mu chopinga cha steric, motero kumawonjezera kulimba kwa kufalikira. Kapangidwe kameneka ndi kabwino kwambiri kuposa zochepetsera madzi zachikhalidwe za naphthalene ndi aliphatic.

2. Udindo waukulu mu simenti

2.1. Kumathandiza kwambiri kuti madzi aziyenda bwino

Posunga chiŵerengero cha madzi ndi simenti chosasinthika, PCE imatha kusintha kwambiri kusinthasintha kwa matope, zomwe zimapangitsa kuti zikhale zosavuta kupanga ndikufalitsa mofanana, makamaka zoyenera kugwiritsa ntchito matope odzipangira okha komanso zipangizo zolumikizira.

2.2. Kuchepetsa kwambiri kugwiritsa ntchito madzi

PCE ikhoza kuchepetsa madzi osakaniza ndi pafupifupi 20%-35% popanda kusokoneza kusinthasintha kwa madzi, motero kumawonjezera kuchuluka ndi mphamvu ya matope ndikuwonjezera kulimba.

2.3. Kuwongolera kusunga madzi ndi magwiridwe antchito a zomangamanga

Mwa kufalitsa tinthu ta simenti mofanana, PCE ingachepetse kutuluka kwa madzi ndi kulekanitsa, zomwe zimapangitsa kuti matope akhale olimba, zomwe zimathandiza kukonza ndi kukulitsa mphamvu pambuyo pake.

2.4. Limbikitsani madzi ochulukirapo a simenti

Kuchepetsa kusonkhana kwa tinthu ta simenti ndikulola kuti tigwirizane kwathunthu ndi madzi kudzathandiza kuti madzi azikhala ofanana komanso kukula kwa mphamvu ya matope.

2.5. Konzani makhalidwe a makina

Chifukwa cha kuchuluka kwa madzi omwe amachepetsedwa komanso kapangidwe kake kakang'ono, matope a simenti osakanikirana ndi PCE ali ndi mphamvu zambiri zopondereza komanso zopindika, makamaka mu matope amphamvu kwambiri.

3. Ubwino wa magwiridwe antchito

Kuchepetsa madzi moyenera: Poyerekeza ndi zochepetsera madzi zachikhalidwe zochokera ku naphthalene ndi lignin, PCE ili ndi chiŵerengero chachikulu cha kuchepetsa madzi komanso magwiridwe antchito okhazikika.

Mlingo wochepa komanso magwiridwe antchito apamwamba: Nthawi zambiri mlingo wake ndi 0.1%-0.3% yokha ya zinthu zomangira simenti, zomwe zingathandize kuchepetsa madzi bwino.

Kugwirizana bwino: Kungaphatikizidwe ndi mitundu yosiyanasiyana ya simenti ndi zosakaniza, ndipo kumatha kusinthasintha kwambiri.

Kuteteza chilengedwe komanso kuipitsa: Chochepetsa madzi cha Polycarboxylate ndi chinthu chobiriwira komanso choteteza chilengedwe chomwe chimakwaniritsa zosowa za chitukuko chamakono chokhazikika pa zomangamanga.

4. Kugwira ntchito bwino pa ntchito zenizeni

4.1. Mtondo wodzisankhira wokha

PCE imapangitsa kuti matope azikhala ndi madzi okwanira komanso kuti azitha kudzigwira okha, zomwe ndi zoyenera kulinganiza nthaka, kutseka ndi kukonza.

4.2. Chomatira cha matailosi, chomata cha pulasitala chopyapyala

Sinthani momwe kapangidwe kake kamamvekera, onjezerani kulimba kwa maziko, ndikuchepetsa ming'alu.

4.3. Konzani matope ndi zinthu zopangira pulasitiki

Chepetsani chiŵerengero cha madzi ndi simenti, onjezerani kuchulukana ndi mphamvu yoyambirira, yoyenera mapulojekiti omwe ali ndi mphamvu zambiri komanso zofunikira pakuyenda bwino kwa madzi.

5. Malangizo Ogwiritsira Ntchito

5.1. Kulamulira mlingo

Mlingo wochuluka ungayambitse kusungunuka kwa matope ambiri, kutuluka kwa madzi kapena nthawi yayitali yokhazikika, zomwe ziyenera kusinthidwa kutengera mayeso.

5.2. Kusakaniza ndi zinthu zina zosakaniza

PCE iyenera kuyesedwa kuti igwirizane ndi zinthu zobweza, zinthu zopumira mpweya, ndi zina zotero kuti ipewe kusamvana kwa magwiridwe antchito.

5.3. Mphamvu ya zinthu zopangira

Mtundu wa simenti, kusalala kwa mchenga, kutentha ndi zinthu zina zimakhudza kwambiri zotsatira za PCE, ndipo chiŵerengero cha kusakaniza chiyenera kukonzedwa bwino malinga ndi momwe zinthu zilili pamalopo.

5.4. Kusunga ndi Kunyamula

Madzi a PCE ayenera kukhala otetezedwa ku chisanu, osapsa ndi dzuwa, komanso otsekedwa kuti asungidwe, ndipo nthawi yosungiramo zinthu iyenera kukhala miyezi 6; ufa uyenera kukhala wotetezedwa ku chinyezi.

Chochepetsa madzi cha polycarboxylate chimagwira ntchito yofunika kwambiri mu matope a simentiNdi mphamvu zake zochepetsera madzi, kufalikira bwino komanso kusunga pulasitiki. Ndi chitukuko chopitilira cha zipangizo zomangira zobiriwira ndi matope ogwira ntchito bwino, kapangidwe ka kapangidwe kake ndi ukadaulo wogwiritsira ntchito PCE zikukonzedwanso nthawi zonse. Kugwiritsa ntchito bwino PCE sikungongowonjezera magwiridwe antchito a matope okha, komanso kumathandiza kukwaniritsa zolinga ziwiri za kusunga mphamvu ndi kuchepetsa utsi ndi kukonza khalidwe la zomangamanga.