Tsiku Lomaliza Ntchito: 20 May, 2024

7. Pamene polycarboxylic acid admixture ndi mayesero osakanikirana (pakupanga), pamene mlingo wokhawo umafikira, ntchito yoyamba yogwira ntchito ya konkire idzakhutitsidwa, koma kutaya konkire kudzakhala kwakukulu; choncho, panthawi yoyesa-kusakaniza (kupanga), ndalamazo ziyenera kuwonjezeredwa moyenera. Pokhapokha posintha mlingo (ndiko kuti, kufika pa mlingo wa saturation) ndiye kuti vuto la kutaya kwakukulu kungathetsedwe.

8.Atachepetsa kuchuluka kwa zinthu za simenti, chiŵerengero cha madzi-simenti chiyenera kutsimikiziridwa mozama kwambiri panthawi yopanga. Ngati kutayika kwa slump kuli kwakukulu, njira yokhayo ndiyo kuonjezera kuchuluka kwa admixture ndikuwonjezera kusakaniza kawiri. Osawonjezera madzi kuti athetse vutoli, apo ayi zingayambitse kuchepa kwakukulu kwa mphamvu.

9. Polycarboxylate yochepetsera madzi ndi mankhwala omwe ali ndi madzi otsika kwambiri komanso kufalikira kwakukulu. Pakuwongolera kupanga, index ya fluidity (kukulitsa) konkriti iyenera kugwiritsidwa ntchito kuyeza kugwira ntchito kwa konkire. Slump ingagwiritsidwe ntchito ngati mtengo wofotokozera.

10. Mphamvu ya konkire imatsimikiziridwa makamaka ndi chiŵerengero cha madzi-binder. Polycarboxylate kuchepetsa madzi wothandizila ali ndi makhalidwe a mlingo mkulu kuchepetsa madzi, amene mosavuta kuchepetsa kumwa madzi mu kupanga kusakaniza chiŵerengero, potero kukwaniritsa cholinga kuchepetsa madzi-binder chiŵerengero ndi kuchepetsa mphamvu konkire. ndalama zonse. Popeza zopangira zimasinthasintha kwambiri panthawi yopanga kuposa pakuyesa, kuti agwiritse ntchito bwino zinthu zopangidwa ndi polycarboxylate superplasticizer, zosakaniza ziyenera kusinthidwa munthawi yake molingana ndi momwe zinthu ziliri, kusintha kwa kutentha kwapakati, ndi zina zambiri. konkriti panthawi yopanga. Mlingo.

11. Mankhwala ochepetsa madzi a polycarboxylic acid sangasakanizidwe ndi mankhwala ochepetsa madzi a naphthalene. Mukamagwiritsa ntchito mankhwala ochepetsera madzi a polycarboxylic acid, makina osakaniza ndi osakaniza omwe agwiritsa ntchito zochepetsera madzi a naphthalene ayenera kutsukidwa, apo ayi mankhwala ochepetsera madzi a polycarboxylic acid akhoza kuwonongeka. Wothandizira kuchepetsa madzi amataya mphamvu yake yochepetsera madzi.

12. Polycarboxylate superplasticizer sayenera kukhudzana kwa nthawi yayitali ndi zida zachitsulo. Popeza mankhwala ochepetsa madzi a polycarboxylate nthawi zambiri amakhala acidic, kukhudzana kwanthawi yayitali ndi chitsulo kumayambitsa kutsika pang'onopang'ono, komwe kumatha kudetsa kapena kudetsa mtundu, zomwe zimapangitsa kuchepa kwa magwiridwe antchito. Ndibwino kugwiritsa ntchito ndowa za pulasitiki za polyethylene kapena ndowa zachitsulo zosapanga dzimbiri kuti zisungidwe kuti zitsimikizire kukhazikika kwa ntchito.