Tsiku Lotumiza: 21, Nov, 2022

Mu njira zina zopangira konkriti, womangayo nthawi zambiri amawonjezera chinthu china chochepetsera madzi, chomwe chimatha kusunga kugwa kwa konkire, kupititsa patsogolo kubalalitsidwa kwa tinthu tating'onoting'ono, ndikuchepetsa kumwa madzi. Komabe, pali drawback kuti madzi kuchepetsa wothandizira ndi surfactant, amene adzatsogolera m'badwo wa thovu, zomwe zidzakhudza mphamvu ndi khalidwe la konkire. Ngati chithovu chapangidwa panthawi yomanga, chiyenera kuchotsedwa panthawi yake. Pali defoamer yomwe ingakhale kwambiri Njira yabwino yochotsera thovu la konkire ndi simenti yochepetsera madzi yotsitsa defoamer.

Kugwiritsa ntchito defoamer kwa defoamer yochepetsera madzi simenti:

Thedefoamer imapangidwa makamaka ndi polyether yosinthidwa ndipo ndi ya polyetherdefoamer. Thedefoamer sichidzasokoneza zinthu zofunika za konkire pakugwiritsa ntchito thovu la konkire, ndipo zimatha kukhala ndi zotsatira zochepetsera komanso zopondereza chithovu. Thedefoamerali ndi dispersibility wabwino mu thovu konkire, ndipo akhoza mwamsanga omwazika mu thovu konkire kukwaniritsa chomaliza chithovu kuswa ndi defoaming kwenikweni. Kuphatikiza pa kutulutsa thovu ndi anti-foaming mu thovu la konkriti, imathanso kutulutsa thovu pakutentha kwambiri komanso chilengedwe cha asidi ndi alkali.

The defoaming zotsatira za simenti madzi kuchepetsa wothandiziradefoamer:

Zotsatira zadefoamer pa ntchito ya konkire makamaka akuwonetseredwa mbali ziwiri: pa dzanja limodzi, akhoza kuthetsa thovu mpweya pakati konkire ndi formwork kumlingo, mogwira kuteteza kapena kuthetsa m`badwo wa zisa ndi pockmarked pamalo pa konkire pamwamba, ndi kupanga pamwamba pa konkire kukhala High flatness ndi gloss. Kumbali ina, adefoamer akhoza kuthetsa kuchuluka kwa mpweya thovu mu konkire, kuchepetsa zili mpweya ndi mkati porosity konkire, ndi kusintha makina katundu ndi durability wa konkire.

Momwe mungagwiritsire ntchito simenti yochepetsera madzidefoamer:

1. Pamene adefoamer amagwiritsidwa ntchito popanga thovu la konkire ndi chochepetsera madzi, slurry ya thovu ya konkriti idzakhala yomata. Ndi bwino kuwonjezeradefoamer mwamsanga pamene chithovu chimapangidwa, chomwe chimatha kuthetsa mwamsanga mikwingwirima ikuluikulu yosagwirizana ndi thovu la konkire ndikuyambitsa yunifolomu Mapiritsi ang'onoang'ono a mpweya amatha kuonjezera kuuma kwa konkire.

2. Thedefoamer ali ndi dispersibility amphamvu ndipo mosavuta kupatukana atayikidwa kwa nthawi yaitali. Ndibwino kuti kusakaniza kosalekeza kuchitidwe panthawi yochotsa thovu la konkire.

3. Thedefoamer zitha kuchepetsedwa chifukwa cha kuchuluka kwake, choncho chonde pewani kugwiritsa ntchito pH ikadutsa 10.