Zowonjezera zowonjezera za konkire ndizowonjezera zomwe zimagwiritsidwa ntchito kufulumizitsa kukhazikitsa ndi kuumitsa konkire. Zosakanizazi zimakhala zothandiza makamaka m'nyengo yozizira kwambiri kapena pamene konkriti imayenera kukhazikitsidwa mwamsanga, monga momwe zimakonzedwera mwadzidzidzi kapena ntchito zomanga zomwe zimagwira nthawi.

Pali mitundu iwiri ikuluikulu ya ma admixtures othamangitsira konkire: opangidwa ndi chloride komanso osakhala ndi chloride. Zosakaniza zochokera ku chloride, zomwe nthawi zambiri zimakhala ndi calcium chloride kapena sodium chloride, ndizofala komanso zogwira mtima zomwe zimafulumizitsa. Komabe, chifukwa cha kuthekera kwawo kuchititsa dzimbiri kulimbitsa zitsulo, ziyenera kugwiritsidwa ntchito mu konkire yosakanizidwa kapena pamene kulimbikitsako kumatetezedwa mokwanira. Zosakaniza zopanda chloride zochokera ku accelerating admixtures, zomwe nthawi zambiri zimakhala ndi calcium nitrate kapena calcium formate, ndi njira zina zotetezeka ndipo zingagwiritsidwe ntchito mu konkire yolimbitsa.

Momwe Kuthamangitsira Zosakaniza Zimagwirira Ntchito

Imathandizira ma admixtures ntchito powonjezera kuchuluka kwa zomwe zimachitika pakati pa simenti ndi madzi mu osakaniza a konkire. Izi, zomwe zimadziwika kuti hydration, ndizomwe zimapangitsa kuti kusakaniza kukhale kolimba ndikupeza mphamvu.

Pamene kusakaniza kofulumira kumaphatikizapo kusakaniza konkire, kumakhala ngati chothandizira, kufulumizitsa ndondomeko ya hydration ndikulola konkire kuti ikhale ndi kuuma mofulumira. Njira yeniyeni yomwe ma admixtures amafulumizitsa ntchito imasiyanasiyana malinga ndi mtundu wa admixture omwe amagwiritsidwa ntchito. Zosakaniza zochokera ku chloride zimagwira ntchito potsitsa madzi oundana mu konkire, kuwalola kuti akhazikike ndi kuumitsa pa kutentha kochepa. Zosakaniza zopanda chloride zimagwira ntchito pofulumizitsa mapangidwe a gel osakaniza a calcium silicate hydrate (CSH), omwe ndi gawo lalikulu lomwe limapangitsa mphamvu ya konkriti.

Ubwino Wowonjezera Zosakaniza

1. Kukhazikitsa Mwachangu ndi Kuwumitsa

Phindu lalikulu la kufulumizitsa zosakaniza za konkire ndikuti zimafulumizitsa kukhazikitsa ndi kuumitsa ndondomeko ya kusakaniza. Izi zimathandiza kuti nthawi yomanga ikhale yofulumira komanso kutha msanga kwa ntchito zomwe zimatenga nthawi.

2. Kuchita bwino kwa Nyengo Yozizira

Kuthamangitsa zosakaniza ndizothandiza makamaka nyengo yozizira, pomwe konkire imatha kutenga nthawi yayitali kuti ikhazikike ndikuumitsa. Mwa kufulumizitsa ndondomeko ya hydration, izi zosakaniza zimalola konkriti kutsanulidwa ndikuyika pa kutentha kochepa.

3. Kuonjezera Mphamvu

Kuphatikiza pa kufulumizitsa makonzedwe ndi kuumitsa, ma admixtures ena othamanga amathanso kupititsa patsogolo mphamvu ya konkire yomalizidwa. Izi ndichifukwa chakuti amalimbikitsa kupanga gel osakaniza a CSH, omwe ndi gawo lalikulu lomwe limapangitsa mphamvu ya konkire.

4. Mtengo Wochepetsedwa

Kugwiritsa ntchito zosakaniza zofulumira kungathandize kuchepetsa mtengo wonse wa ntchito yomanga mwa kufulumizitsa nthawi yomanga ndi kulola kuti ntchitoyo ithe mwachangu. Izi zingapangitse kuti asunge ndalama zogulira anthu ogwira ntchito komanso ndalama zina zokhudzana ndi zomangamanga.

Zochepa Zowonjezereka Zosakaniza

1. Chiwopsezo cha Corrosion

Kugwiritsa ntchito chloride-based acceleratingzosakanizamu konkire yolimba ikhoza kuonjezera chiopsezo cha dzimbiri zitsulo zolimbitsa. Izi zitha kufooketsa kamangidwe ka konkire ndikupangitsa kukonza kokwera mtengo.

2. Kuchepetsa Ntchito

Kuonjezera kusakaniza kofulumira ku konkire kumatha kuchepetsa kugwira ntchito kwake, zomwe zimapangitsa kuti zikhale zovuta kusakaniza ndi kutsanulira. Izi zitha kubweretsa ndalama zowonjezera zogwirira ntchito ndi zida.

3. Moyo Wocheperako wa Shelf

Ma admixtures ofulumizitsa amakhala ndi alumali ochepa ndipo amatha kutaya mphamvu pakapita nthawi. Izi zingapangitse kuti pakhale kufunikira kophatikizika kowonjezera kowonjezera kusakaniza konkire, komwe kungawonjezere ndalama.

4. Kuthekera kwa Cracking

Kufulumizitsa ma admixtures kungayambitse konkire kuti ikhazikike ndikuumitsa mofulumira, zomwe zingapangitse chiopsezo cha kusweka ngati kusakaniza sikukuchiritsidwa bwino ndi kulimbikitsidwa.

Mapeto

Kufulumizitsa ma admixtures kwa konkire ndi chida chothandizira kufulumizitsa kukhazikitsa ndi kuumitsa ndondomeko ya konkire. Ndiwothandiza makamaka pakuzizira kozizira komanso ntchito zomanga zomwe zimatenga nthawi yayitali, zomwe zimapangitsa kuti nthawi yomaliza ifike mwachangu komanso kuchepetsa ndalama zogwirira ntchito. Komabe, kugwiritsa ntchito mankhwala enaake opangidwa ndi chloride mu konkire yolimbitsa kumatha kuonjezera ngozi ya dzimbiri, ndipo zosakaniza zopanda chloride zimatha kuchepetsa kusakanikirana kwa zinthuzo. Kufulumizitsa ma admixtures kumakhalanso ndi moyo wa alumali wocheperako ndipo kumatha kuonjezera chiopsezo chosweka ngati kusakaniza sikunachiritsidwe bwino ndikulimbitsa. Ngakhale pali zolephera izi, kufulumizitsa ma admixtures kumakhalabe chida chofunikira kwa makontrakitala ndi mainjiniya omwe akufuna kufulumizitsa ntchito yomanga ndikuwongolera magwiridwe antchito a konkriti.