Tsiku Lotumiza: 6 Jun, 2022

Poyamba, kusakaniza kunkagwiritsidwa ntchito posungira simenti. Ndi chitukuko cha luso zomangamanga, admixture wakhala muyeso waukulu kusintha konkire ntchito.

Chifukwa cha superplasticizers, konkire yothamanga kwambiri, konkire yodzipangira yokha, konkire yamphamvu kwambiri imagwiritsidwa ntchito; chifukwa cha thickeners, katundu wa konkire pansi pa madzi ndi bwino: chifukwa cha retarders, nthawi yokhazikitsa simenti ndi yaitali , n'zotheka kuchepetsa kutsika kutayika ndikutalikitsa nthawi yomangamanga: chifukwa cha antifreeze, malo ozizira a yankho. akhoza kutsitsa, kapena mapindikidwe a mawonekedwe a ayezi akristalo sangawononge kuwonongeka kozizira. Ndizotheka kupanga ntchito yomanga pansi pa kutentha koipa.

Nthawi zambiri, ma admixtures amakhala ndi zotsatirazi pakuwongolera mawonekedwe a konkriti:

 1. Ikhoza kuchepetsa kumwa madzi konkire. Kapena kuonjezera fluidity wa konkire popanda kuwonjezera kuchuluka kwa madzi.

2. Nthawi yoyika konkire ikhoza kusinthidwa.

3. Kuchepetsa magazi ndi kulekanitsa. Limbikitsani kugwirira ntchito ndi kukana madzi elutriation.

4. Kutaya kwamphamvu kumatha kuchepetsedwa. Wonjezerani mphamvu ya pompopompo konkriti.

5. Kuchepa kumatha kuchepetsedwa. Kuwonjezera bulking wothandizira kungathenso kulipira shrinkage.

6. Chepetsani kutentha koyambirira kwa hydration konkriti. Kuchepetsa kutentha kukwera mlingo wa misa konkire ndi kuchepetsa zimachitika ming'alu.

7. Sinthani mphamvu zoyambirira za konkire. Pewani kuzizira ndi kutentha koyipa.

8. Kupititsa patsogolo mphamvu, kuwonjezera kukana kwa chisanu, kusasunthika, kuvala kukana komanso kukana kwa dzimbiri.

9. Onetsetsani momwe alkali-aggregate reaction. Pewani dzimbiri zachitsulo ndikuchepetsa kufalikira kwa chloride ion.

10. Zopangidwa ndi konkriti ndi zinthu zina zapadera.

11. Chepetsani makulidwe a viscosity konkire, etc.

 Pambuyo powonjezera zosakaniza ku konkire, chifukwa cha mitundu yosiyanasiyana, zotsatira zake zimakhalanso zosiyana, zomwe zambiri zimakhala ndi zotsatira za thupi, monga kutsekemera pamwamba pa tinthu tating'ono ta simenti kuti tipange filimu ya adsorption, yomwe imasintha zomwe zingatheke ndipo imapanga kuyamwa kosiyana kapena kuthamangitsidwa; Kuwononga dongosolo la flocculation, kupititsa patsogolo kukhazikika kwa dongosolo la simenti, ndikuwongolera zinthu za simenti ya simenti: ena amatha kupanga mapangidwe a macromolecular ndikusintha dziko la adsorption pamwamba pa particles simenti; ena amatha kuchepetsa kugwedezeka kwapamtunda ndi mphamvu ya pamwamba pa madzi, ndi zina zotero.

Chifukwa admixture akhoza bwino patsogolo ntchito konkire, ndipo ali ndi ubwino zachuma. Yakhala ikugwiritsidwa ntchito kwambiri m'maiko ambiri ndipo yakhala chinthu chofunikira kwambiri mu konkriti. Makamaka kugwiritsa ntchito ochepetsa potency apamwamba. Tinthu tating'ono ta simenti titha kumwazikana kwathunthu, kumwa madzi kumachepetsedwa kwambiri, ndipo mphamvu ya simenti imagwiritsidwa ntchito mokwanira. Chotsatira chake, mwala wa simenti ndi wandiweyani, ndipo mawonekedwe a pore ndi microstructure ya malo owonetserako amasintha bwino, kotero kuti mawonekedwe a thupi ndi makina a konkire asinthidwa kwambiri, kaya ndi madzi osakwanira, kapena kufalikira kwa chloride ion. , carbonization, ndi sulphate corrosion resistance. . Komanso kukana zimakhudza, kuvala kukana ndi mbali zina ndi bwino kuposa konkire popanda admixtures, osati kusintha mphamvu, kusintha workability. Ikhozanso kusintha kulimba kwa konkriti. Ndizotheka kupanga konkriti yapamwamba yogwira ntchito kwambiri, mphamvu zambiri komanso kukhazikika kwakukulu mwa kusakaniza superplasticizers.