Tsiku Lotumiza: 16, Jan, 2023

Zowonjezera konkriti ndi mankhwala ndi zinthu zomwe zimaphatikizidwa mu simenti kuti zisinthe magwiridwe ake. Zowonjezera zimapereka phindu lapadera pa ntchito inayake. Zowonjezera zamadzimadzi zomwe zimagwiritsidwa ntchito pogaya simenti zimalimbitsa mphamvu ya simenti. Zomangira zomangira konkriti zomangira konkriti zakale mpaka zatsopano zantchito zamkati ndi kunja monga kutsekera khoma ndi kukonzanso. Zowonjezera zamitundu zimapereka konkriti mawonekedwe owoneka bwino. Kaya ntchitoyo ndi yotani, zowonjezera za konkriti zimathandizira kuti izi zitheke.

Konkire ya nyengo yozizira imakhala ndi mphamvu zopambana kuposa konkire zomwe zimayikidwa nyengo yotentha. Kutentha kotsika, komabe, konkire imayika ndipo imapeza mphamvu pang'onopang'ono chifukwa simenti simadzimadzi mwachangu. Kukhazikitsa nthawi kumachulukitsidwa pafupifupi gawo limodzi mwa magawo atatu aliwonse a 10 digiri kutsika kwa konkriti kutentha mpaka madigiri 40 Fahrenheit. Kufulumizitsa zosakaniza kungathandize kuthana ndi izi za kutentha kotsika pakukhazikitsa ndi kukulitsa mphamvu. Ayenera kukwaniritsa zofunikira za ASTM C 494, Standard Specifications for Chemical Admixtures for Concrete.

Jufu imapereka zowonjezera za konkire pa nyengo yozizira komanso zowonjezera za konkire zoletsa madzi, zomwe zingagwiritsidwe ntchito kwambiri pa Ntchito Yomanga.

Ubwino wa konkriti wophatikizika bwino ndi chiyani

1. Popeza zinthu zotere zimakhala ndi mgwirizano wabwino komanso zimakhala zokhazikika panthawi yomanga, kupanga bwino kumakhala bwino kwambiri. Chofunikira ndichakuti musagwedezeke popanga, zomwe zimachepetsa nthawi yothira ndi kulimba kwa ntchito, komanso zimachepetsa mtengo wantchito.

2. Monga tanenera kale, chifukwa palibe chifukwa chogwedezeka, palibe phokoso, ndipo manja a anthu amatha kukhala omasuka, zomwe zimapangitsa kuti chitetezo cha ntchito chikhale bwino komanso chimapangitsa kuti ntchito ikhale yabwino.

3. Kuchokera pamalingaliro a khalidwe la zomangamanga, sipadzakhala thovu pamtunda womanga pamene mukugwiritsa ntchito nkhaniyi, osasiya kukonza. Panthawi imodzimodziyo, mlingo wake waufulu ndi wapamwamba kwambiri, ngakhale mawonekedwe ovuta kwambiri kapena mapangidwe omwe ali ndi kulimbikitsana kolimba akhoza kutsanulidwa mosavuta.

Zomwe zikuyenera kutsatiridwa pakusakaniza konkriti:

1. Wosakaniza wosakaniza wokhala ndi zinthu zosiyana ndi zolemba zosiyana ndi zosiyana, osati zokhazokha, komanso zimadalira mtundu wa zipangizo zenizeni, kuti asankhe zosakaniza zoyenera ndi zipangizo.

2. Kugwiritsa ntchito siteshoni imodzi kapena masiteshoni awiri kumadalira kuchuluka kwa ntchito. Ngati konkire yochuluka ikufunika kutsanulidwa nthawi imodzi ndipo zofunikira za khalidwe lake ndizokwera kwambiri, ndi bwino kugwiritsa ntchito magulu awiri a zomera zazing'ono zosakaniza.