Tsiku Lotumiza:27,Nov,2023

Retarder ndi chosakaniza chomwe chimagwiritsidwa ntchito kwambiri pomanga uinjiniya.ntchito yake yaikulu ndi bwino kuchedwetsa kuchitika kwa kutentha pachimake cha simenti hydration, amene ndi opindulitsa kwa mtunda wautali zoyendera, mkulu yozungulira kutentha ndi zinthu zina za konkire, matope simenti ndi zipangizo zina zomangira.Kusunga pulasitiki pansi zinthu, potero kuwongolera khalidwe la konkire kuthira;zikakhudzidwa ndi zochitika zina zapadera monga nyengo kapena zofunikira za ndondomeko yomanga, retarder iyeneranso kuwonjezeredwa, zomwe zingathe kupititsa patsogolo ntchito ya konkire, kuwonjezera nthawi yoyika simenti, komanso kuchepetsa ming'alu ya zomangamanga.Momwe mungasankhire mtundu woyenera ndi mlingo wa retarder kuti mukhudze ntchito ya konkire ya simenti ndi funso loyenera kuphunzira.

1.Effect pa Clotting Time

Pambuyo powonjezera retarder, nthawi yoyamba ndi yomaliza yoyika konkire imatalika kwambiri.Retarders osiyana ali ndi zotsatira zosiyana pa konkire kukhazikitsa nthawi pa mlingo womwewo, ndi retarders osiyana ndi osiyana retarding zotsatira pa konkire.Wochedwetsa bwino ayenera kukhala ndi zotsatira zabwino zochedwetsa pamene mlingo wake uli wochepa.Wochedwetsa bwino ayenera kukulitsa nthawi yoyika konkriti ndikuchepetsa nthawi yomaliza.Ndiko kunena kuti, nthawi yoyamba komanso yomaliza yoyika konkriti iyenera kufupikitsidwa momwe mungathere.

 2.Mmene workability wa osakaniza

Muzochita zaumisiri, kuti zigwirizane ndi zoyendera ndikukwaniritsa zofunikira zomanga, retarder nthawi zambiri imawonjezedwa ku konkire kuti ipititse patsogolo kugwira ntchito kwa konkriti ndikuchepetsa kutayika kwa nthawi.Kuwonjezera kwa retarder kumapangitsanso kufanana ndi kukhazikika kwa kusakaniza, kumasunga pulasitiki kwa nthawi yaitali, kumapangitsa kuti zomangamanga za konkire zikhale bwino, komanso zimateteza bwino ming'alu yomwe imayamba chifukwa cha kuchepa koyambirira kwa konkire.

3.Effect pa mphamvu konkire

Kuwonjezera retarder akhoza mokwanira hydrate ndi simenti particles, amene n'kopindulitsa kuonjezera mphamvu konkire pakati ndi mochedwa magawo.Popeza retarders ena amakhalanso ndi ntchito yochepetsera madzi, mkati mwa mlingo woyenera wa mlingo, ngati mlingo uli wokulirapo, chiŵerengero cha simenti ya madzi a konkire chidzakhala chaching'ono, chomwe chingathandize kukula kwa mphamvu ya konkire.M'mapulojekiti enieni, chifukwa cha mlingo wochuluka wa retarder, konkire ikhoza kukhazikitsidwa kwa nthawi yaitali, ndipo mphamvu ya konkire sichingakwaniritse zofunikira za mapangidwe panthawi yovomerezeka ya polojekiti.Choncho, tiyenera kulabadira kusankha retarder mitundu ndi mosamalitsa kulamulira mlingo wa retarder.Panthawi imodzimodziyo, tiyeneranso kuganizira mozama za kufanana ndi kusinthasintha pakati pa retarder ndi zopangira konkriti.