Tsiku Lotumiza: 26, Dec, 2022
1. Madzi Ochepetsa Konkire Zosakaniza
Zosakaniza zochepetsera madzi ndi mankhwala omwe akawonjezedwa ku konkire amatha kupanga kutsika kofunikira pamlingo wochepera wa simenti yamadzi kuposa momwe amapangidwira. Zosakaniza zochepetsera madzi zimagwiritsidwa ntchito kupeza mphamvu zenizeni za konkire pogwiritsa ntchito simenti yochepa. Zomwe zili m'munsi mwa simenti zimapangitsa kuti mpweya wa CO2 ukhale wotsika komanso kugwiritsa ntchito mphamvu pa voliyumu ya konkire yopangidwa. Ndi kusakaniza kotereku, katundu wa konkire amawongolera ndikuthandizira kuyika konkire pansi pazovuta. Zochepetsera madzi zakhala zikugwiritsidwa ntchito makamaka m'mabwalo amilatho, zokutira konkriti zotsika pang'ono, ndi zomangira konkire. Kupita patsogolo kwaposachedwa kwaukadaulo wa admixture kwapangitsa kuti pakhale zochepetsera madzi apakatikati.
2. Konkire Zosakaniza: Superplasticizers
Cholinga chachikulu chogwiritsira ntchito superplasticizers ndi kupanga konkire yothamanga ndi kutsika kwakukulu pamtunda wa masentimita asanu ndi awiri mpaka asanu ndi anayi kuti agwiritsidwe ntchito m'mapangidwe olimbikitsidwa kwambiri ndi malo omwe kugwirizanitsa kokwanira ndi kugwedezeka sikungatheke mosavuta. Ntchito ina yayikulu ndikupanga konkriti yamphamvu kwambiri pa w/c kuyambira 0.3 mpaka 0.4. Zapezeka kuti pamitundu yambiri ya simenti, superplasticizer imathandizira kugwira ntchito kwa konkriti. Vuto limodzi lokhudzana ndi kugwiritsa ntchito chochepetsera madzi ambiri mu konkriti ndikutaya kwapang'onopang'ono. Konkire yogwira ntchito kwambiri yomwe ili ndi superplasticizer imatha kupangidwa ndi kukana kuzizira kwambiri, koma mpweya uyenera kuonjezedwa poyerekezera ndi konkriti popanda superplasticizer.
3. Concrete Admixtures: Set-Retarding
Khazikitsani retarding konkire admixtures ntchito kuchedwetsa zimachitikira mankhwala zimene zimachitika pamene konkire akuyamba ndondomeko yoika. Mitundu ya zosakaniza za konkirezi zimagwiritsidwa ntchito pofuna kuchepetsa kutentha kwapamwamba komwe kungapangitse konkriti yofulumira kwambiri. Set retarding admixtures amagwiritsidwa ntchito pomanga miyala ya konkire, kulola nthawi yochulukirapo yomaliza misewu ya konkriti, kuchepetsa ndalama zowonjezera kuyika chomera chatsopano cha konkire pamalo ogwirira ntchito ndikuthandizira kuthetsa zimfundo zozizira mu konkriti. Ma retarders angagwiritsidwenso ntchito kukana ming'alu chifukwa cha kupatuka kwa mawonekedwe komwe kumatha kuchitika pamene ma slabs opingasa ayikidwa m'magawo. Zotsalira zambiri zimagwiranso ntchito ngati zochepetsera madzi ndipo zimatha kulowetsa mpweya mu konkriti
4. Konkire Zosakaniza: Air-Entraining Agent
Konkire yopangira mpweya imatha kuwonjezera kukhazikika kwa konkriti kuzizira. Kusakaniza kotereku kumapanga konkire yogwira ntchito kwambiri kuposa konkire yosaphunzitsidwa pamene kuchepetsa magazi ndi kulekanitsa konkire yatsopano. Kupititsa patsogolo kukana kwa konkire ku mphepo yamkuntho kapena kuzizira / kusungunuka. Ubwino wina kuchokera ku kuphatikiza uku ndi:
a. High kukana mkombero wa kunyowetsa ndi kuyanika
b. Mlingo wapamwamba wogwira ntchito
c. Mkulu digiri ya durability
Mpweya wopangidwa ndi mpweya umakhala ngati chitetezo choteteza kung'ambika komwe kumachitika chifukwa cha kupsinjika chifukwa cha kuchuluka kwa madzi munyengo yozizira kwambiri. Zosakaniza zokondweretsa mpweya zimagwirizana ndi pafupifupi zosakaniza zonse za konkire. Childs aliyense 1 peresenti ya mpweya intrained, compressive mphamvu adzakhala yafupika pafupifupi asanu peresenti.
5. Konkire Zosakaniza: Kuthamanga
Zosakaniza zochepetsera konkire zimawonjezeredwa ku konkire panthawi yoyamba kusakaniza. Kusakaniza kotereku kumatha kuchepetsa kuyanika koyambirira komanso kwanthawi yayitali. Zosakaniza zochepetsera shrinkage zitha kugwiritsidwa ntchito pomwe kung'ung'udza kungayambitse mavuto okhazikika kapena pomwe mafupa ambiri ocheperako amakhala osafunikira pazifukwa zachuma kapena zaukadaulo. Zosakaniza zochepetsera zochepetsera zimatha, nthawi zina, zimachepetsa kukula kwamphamvu pazaka zoyambirira komanso zam'tsogolo.
6.Concrete Admixtures: Shrinkage Kuchepetsa
Zosakaniza zochepetsera konkriti zimawonjezedwa ku konkire pakusakaniza koyambirira. Kusakaniza kotereku kumatha kuchepetsa kuyanika koyambirira komanso kwanthawi yayitali. Zosakaniza zochepetsera shrinkage zitha kugwiritsidwa ntchito pomwe kung'ung'udza kungayambitse mavuto okhazikika kapena pomwe mafupa ambiri ocheperako amakhala osafunikira pazifukwa zachuma kapena zaukadaulo. Zosakaniza zochepetsera zochepetsera zimatha, nthawi zina, zimachepetsa kukula kwamphamvu pazaka zoyambirira komanso zam'tsogolo.
7. Konkire Admixtures: dzimbiri-Kuletsa
Zosakaniza zoletsa corrosion zimagwera m'gulu lapadera la admixture ndipo zimagwiritsidwa ntchito kuti zichepetse kuwonongeka kwa chitsulo cholimbitsa mu konkriti. Ma Corrosion inhibitors amatha kuchepetsa kwambiri mtengo wokonza konkriti wokhazikika pazaka zonse za 30 - 40. Zosakaniza zina zapadera zimaphatikizapo zosakaniza zochepetsera shrinkage ndi alkali-silica reactivity inhibitors. Zosakaniza zoletsa dzimbiri sizikhala ndi mphamvu pang'ono pazaka zakutsogolo koma zimatha kufulumizitsa kukula kwamphamvu. Calcium nitrite based corrosion inhibitors imafulumizitsa nthawi yoyika konkriti pa kutentha kosiyanasiyana pokhapokha atapangidwa ndi seti retarder kuti athetse kufulumira.
Nthawi yotumiza: Dec-27-2022
