Tsiku Lotumiza: 13 Jun, 2022
Admixtures amatanthawuza gulu lazinthu zomwe zimatha kukonza bwino chimodzi kapena zingapo za konkriti. Zomwe zili mkati mwake nthawi zambiri zimangotengera zosakwana 5% za simenti, koma zimatha kupititsa patsogolo ntchito, mphamvu, kulimba kwa konkire kapena kusintha nthawi yoyika ndikusunga simenti.
1. Gulu la zosakaniza:
Zosakaniza za konkriti nthawi zambiri zimagawidwa molingana ndi ntchito zawo zazikulu:
a. Admixtures kusintha rheological zimatha konkire. Pali makamaka chochepetsera madzi, chothandizira mpweya, chopopera ndi zina zotero.
b. Admixtures kusintha kokhazikika ndi kuumitsa katundu wa konkire. Pali makamaka ma retarders, ma accelerator, othandizira mphamvu zoyambira, ndi zina.
c. Admixtures kusintha mpweya zili konkire. Pali makamaka ma air-entraining agents, air-entraining agents, thovu, etc.
d. Zosakaniza kuti konkriti ikhale yolimba. Pali makamaka ma air-entraining agents, zoletsa madzi, zoletsa dzimbiri ndi zina zotero.
e. Zosakaniza zomwe zimapereka katundu wapadera wa konkire. Pali makamaka antifreeze, expansion agent, colorant, air-entraining agent ndi pumping agent.
2. Ma superplasticizers omwe amagwiritsidwa ntchito kwambiri
Madzi kuchepetsa wothandizila amatanthauza admixture kuti akhoza kuchepetsa kusakaniza kumwa madzi pansi pa chikhalidwe chomwecho cha konkire slump; kapena akhoza kuonjezera kugwa konkire pamene konkire kusakaniza chiŵerengero ndi kumwa madzi sasintha. Malingana ndi kukula kwa mlingo wochepetsera madzi kapena kuwonjezeka kwa kugwa, amagawidwa m'magulu awiri: wochepetsera madzi wamba komanso wochepetsera kwambiri madzi.
Kuonjezera apo, pali magulu ochepetsera madzi, monga mpweya wochepetsera madzi, omwe ali ndi zotsatira zochepetsera madzi ndi mpweya; mankhwala oyambirira ochepetsera madzi amakhala ndi zotsatira zochepetsera madzi komanso zoyambitsa msanga; Madzi ochepetsera madzi, alinso ndi ntchito yochepetsera nthawi yoyika ndi zina zotero.
Ntchito yayikulu yochepetsera madzi:
a. Sinthani kwambiri fluidity ndi chiŵerengero chosakanikirana chofanana.
b. Pamene mlingo wa fluidity ndi simenti sunasinthe, kuchepetsa kumwa madzi, kuchepetsa chiŵerengero cha madzi-simenti, ndi kuonjezera mphamvu.
c. Pamene madzi ndi mphamvu zimakhalabe zosasinthika, kugwiritsa ntchito simenti kumapulumutsidwa ndipo mtengo wake umachepetsedwa.
d. Sinthani magwiridwe antchito a konkriti
e. Sinthani kulimba kwa konkriti
f. Konzani konkire yamphamvu kwambiri komanso yogwira ntchito kwambiri.
Polysulfonate zino: kuphatikizapo naphthalene sulfonate formaldehyde condensate (NSF), melamine sulfonate formaldehyde polycondensate (MSF), p-aminobenzene sulfonate formaldehyde polycondensate, kusinthidwa lignin sulfonate, polystyrene Sulfonates ndi sulfonated sulfonate ndi sulfonated ketones D, wamba ndi aldehyde monga aldehyde ndi zina. naphthalene sulfonate formaldehyde condensate.
Mndandanda wa Polycarboxylate: kuwongolera moyenera njira yoyambira ya hydration ndikuchepetsa kutayika kwa konkriti.
Kusiyanitsa pakati pa mankhwala ochepetsera madzi ochepetsetsa kwambiri ndi ochepetsera madzi wamba kumawonekera makamaka kuti wochepetsetsa kwambiri wamadzi amatha kupitiriza kuonjezera madzi amadzimadzi ambiri, kapena kuchepetsa kufunikira kwa madzi mosalekeza. Njira yabwino yochepetsera madzi wamba ndi yaying'ono.
Zotsatira za superplasticizer pa mlingo wochepa sizingagwiritsidwe ntchito ngati maziko oweruza ntchito ya superplasticizer. Izi ziyenera kuganiziridwa posankha chotsitsa madzi. Mlingo woyenera kwambiri wa superplasticizer uyenera kutsimikiziridwa kudzera muzoyesera, ndipo sayenera kugwiritsidwa ntchito molingana ndi mlingo wa opanga superplasticizer.
Nthawi yotumiza: Jun-13-2022
