Tsiku Lotumiza:19, Aug, 2024
4. Vuto la kulowetsa mpweya
Pakupanga, ma polycarboxylic acid-based reduction agents of water reductions nthawi zambiri amakhala ndi zinthu zina zomwe zimagwira ntchito zomwe zimachepetsa kuthamanga kwapamtunda, motero amakhala ndi zinthu zina zopatsa mpweya. Zosakaniza zogwira ntchitozi ndizosiyana ndi zida zachikhalidwe zopangira mpweya. Panthawi yopangira ma air-entraining agents, zinthu zina zofunika pakupanga ma thovu okhazikika, abwino, otsekedwa amaganiziridwa. Izi zosakaniza yogwira zidzawonjezedwa kwa mpweya-entraining wothandizila, kotero kuti thovu anabweretsa mu konkire akhoza kukhala Ikhoza kukwaniritsa zofunikira za mpweya popanda kuwononga mphamvu ndi katundu wina.
Pakupanga zinthu zochepetsera madzi za polycarboxylic acid, mpweya nthawi zina ukhoza kufika pafupifupi 8%. Ngati agwiritsidwa ntchito mwachindunji, adzakhala ndi zotsatira zoipa pa mphamvu. Chifukwa chake, njira yomwe ilipo ndikuchotsa thovu poyamba kenako ndikulowetsa mpweya. Opanga ma antifoaming amatha kupereka nthawi zambiri, pomwe othandizira oyendetsa mpweya nthawi zina amafunika kusankhidwa ndi gawo lofunsira.
5. Mavuto ndi mlingo wa polycarboxylate kuchepetsa madzi
Mlingo wa mankhwala ochepetsa madzi a polycarboxylate ndi otsika, ochepetsa madzi ndi okwera, ndipo kutsika kumasungidwa bwino, koma mavuto otsatirawa amapezekanso pakugwiritsa ntchito:
① Mlingowu ndi wovuta kwambiri pamene chiŵerengero cha madzi ndi simenti ndi chochepa, ndipo chimasonyeza kuchepetsa madzi. Komabe, pamene chiŵerengero cha madzi ndi simenti ndi chachikulu (pamwamba pa 0.4), chiwerengero cha kuchepetsa madzi ndi kusintha kwake sikuli koonekeratu, zomwe zingakhale zogwirizana ndi polycarboxylic acid. Limagwirira ntchito ya acid-ochokera madzi kuchepetsa wothandizila zokhudzana ndi kubalalitsidwa ndi posungira zotsatira chifukwa chotchinga chotchinga chotchinga chopangidwa ndi maselo. Chiŵerengero cha madzi-binder chikakhala chachikulu, pali kusiyana kokwanira pakati pa mamolekyu amadzi mu dongosolo lobalalitsa simenti, kotero kuti malo apakati pa mamolekyu a polycarboxylic acid The steric blockrance effect ndi yaying'ono mwachibadwa.
② Pamene kuchuluka kwa zinthu za simenti kuli kwakukulu, chikoka cha mlingo chimaonekera kwambiri. Pansi pazifukwa zomwezo, mphamvu yochepetsera madzi pamene chiwerengero chonse cha simenti ndi <300kg/m3 ndi chochepa kusiyana ndi kuchepetsa kuchepetsa madzi pamene kuchuluka kwa simenti ndi> 400kg/m3. Komanso, pamene chiŵerengero cha madzi-simenti ndi chachikulu komanso kuchuluka kwa zinthu za simenti ndizochepa, padzakhala zotsatira zopambana.
Polycarboxylate superplasticizer imapangidwira konkriti yogwira ntchito kwambiri, motero magwiridwe ake ndi mtengo wake ndi oyenera konkriti yogwira ntchito kwambiri.
6. Ponena za kuphatikiza kwa polycarboxylic acid yochepetsera madzi
Mankhwala ochepetsa madzi a polycarboxylate sangaphatikizidwe ndi ochepetsa madzi a naphthalene. Ngati zida ziwiri zochepetsera madzi zikugwiritsidwa ntchito pazida zomwezo, zidzakhalanso ndi zotsatira ngati sizikutsukidwa bwino. Chifukwa chake, nthawi zambiri pamafunika kugwiritsa ntchito zida zapadera zochepetsera madzi za polycarboxylic acid.
Malinga ndi momwe amagwiritsidwira ntchito masiku ano, kuyanjana kwapawiri kwa air-entraining agent ndi polycarboxylate ndizabwino. Chifukwa chachikulu ndi chakuti kuchuluka kwa mpweya-entraining wothandizila ndi otsika, ndipo akhoza "n'zogwirizana" ndi polycarboxylic asidi ofotokoza kuchepetsa madzi wothandizila kuti kugwirizana kwambiri. , chowonjezera. Sodium gluconate mu retarder imakhalanso yabwino, koma imagwirizana bwino ndi zina zowonjezera mchere ndipo zimakhala zovuta kuziphatikiza.
7. Ponena za PH mtengo wa polycarboxylic acid wochepetsera madzi
Mtengo wa PH of PolycaboboyIc acid - mankhwala ochepetsa madzi ndi otsika kuposa a majeremudzi ena owononga madzi ambiri, zina mwazomwe zimangokhala 6-7 zokha. Choncho, amayenera kusungidwa mu fiberglass, pulasitiki ndi zitsulo zina, ndipo sangathe kusungidwa muzitsulo zachitsulo kwa nthawi yaitali. Zidzapangitsa kuti chotsitsa madzi cha polycarboxylate chiwonongeke, ndipo pambuyo pakuwonongeka kwa asidi kwa nthawi yayitali, zidzakhudza moyo wa chidebe chachitsulo ndi chitetezo cha malo osungiramo zinthu ndi kayendedwe.
Nthawi yotumiza: Aug-19-2024
