Kugawika kwa konkriti zosakaniza:
1. Admixtures kuwongolera rheological katundu wa konkire zosakaniza, kuphatikizapo zochepetsera madzi osiyanasiyana, mpweya-entraining wothandizira ndi kupopa wothandizira.
2. Zosakaniza zosinthira nthawi yokhazikika ndi kuuma kwa konkire, kuphatikizapo retarders, oyambirira-mphamvu wothandizira ndi accelerators.
3. Admixtures kuti apititse patsogolo kukhazikika kwa konkire, kuphatikizapo mpweya wopangira mpweya, wothandizira madzi ndi dzimbiri zoletsa, etc.
4. Admixtures kukonza zinthu zina za konkire, kuphatikizapo mpweya-entraining wothandizira, wothandizila expansion, antifreeze wothandizira, colorants, wothandizila madzi ndi kupopera wothandizira, etc.
Chotsitsa madzi:
Madzi kuchepetsa wothandizila amatanthauza admixture kuti akhoza kusunga workability wa konkire osasintha ndi kuchepetsa kwambiri kusakaniza kwake kumwa madzi. Popeza kuti madzi ochepetsera madzi akuwonjezeredwa ku nyumba yosakaniza, ngati madzi amtundu wa unit sakusinthidwa, ntchito yake imatha kusintha kwambiri, kotero kuti kuchepetsa madzi kumatchedwanso plasticizer.
1. Njira yogwiritsira ntchito mankhwala ochepetsera madzi Pambuyo pa simentiyo itasakanizidwa ndi madzi, tinthu tating'ono ta simenti timakopana ndikupanga magulu ambiri m'madzi. Mu dongosolo la floc, madzi ambiri osakaniza amakulungidwa, kotero kuti madziwa sangathe kuchita nawo gawo lowonjezera madzi a slurry. Pamene wothandizira kuchepetsa madzi akuwonjezeredwa, wothandizira madzi amatha kusokoneza nyumba zowonongekazi ndikumasula madzi aulere otsekedwa, potero kumapangitsa kuti madzi azitha kusakaniza. Panthawiyi, ngati ntchito ya konkire yapachiyambi ikufunikabe kukhala yosasinthika, madzi osakaniza amatha kuchepetsedwa kwambiri ndipo zotsatira zochepetsera madzi zimatha kutheka, choncho amatchedwa wothandizira madzi.
Ngati mphamvuyo imakhalabe yosasinthika, kuchuluka kwa simenti kumatha kuchepetsedwa ndikuchepetsa madzi kuti akwaniritse cholinga chopulumutsa simenti.
2. Zotsatira zaukadaulo ndi zachuma zogwiritsa ntchito wochepetsera madzi zimakhala ndi zotsatira zaukadaulo ndi zachuma
a. Kuchuluka kwa madzi osakaniza kumatha kuchepetsedwa ndi 5 ~ 25% kapena kuposerapo pamene ntchitoyo imakhala yosasinthika ndipo kuchuluka kwa simenti sikuchepetsedwa. Popeza kuti chiŵerengero cha simenti yamadzi chimachepetsedwa ndi kuchepetsa kuchuluka kwa madzi osakaniza, mphamvu imatha kuwonjezeka ndi 15-20%, makamaka mphamvu zoyamba zimakhala bwino kwambiri.
b. Pansi pa kusunga chiŵerengero choyambirira cha kusakaniza kosasinthika, kugwa kwa osakaniza kungawonjezeke kwambiri (100 ~ 200mm akhoza kuwonjezeka), kupangitsa kuti ikhale yabwino yomanga ndi kukwaniritsa zofunikira za kupopera konkriti.
c. Ngati mphamvu ndi ntchito zikusungidwa, simenti imatha kupulumutsidwa ndi 10-20%.
d. Chifukwa cha kuchepa kwa kuchuluka kwa madzi osakaniza, kutuluka kwa magazi ndi kulekanitsa kwa osakaniza kumatha kusintha, zomwe zingapangitse kuti chisanu chisamalire komanso kusungunuka kwa konkire. Chifukwa chake, kukhazikika kwa konkriti komwe kumagwiritsidwa ntchito kudzakhala bwino.
3. Zochepetsa madzi zomwe zimagwiritsidwa ntchito kwambiri masiku ano
Kuchepetsa madzi makamaka monga lignin mndandanda, naphthalene mndandanda, utomoni mndandanda, molasses mndandanda ndi humic mndandanda, etc. Mtundu uliwonse akhoza kugawidwa mu wamba kuchepetsa wothandizila madzi, mkulu-mwachangu kuchepetsa wothandizila madzi, oyambirira mphamvu kuchepetsa wothandizila madzi, retarder malinga ndi ntchito yaikulu. Madzi kuchepetsa wothandizira, mpweya-entraining madzi kuchepetsa wothandizira, etc.
Nthawi yotumiza: Feb-18-2022
