Tsiku Lolemba:11, Sep,2023

Kuyambira m'ma 1980s, adndictures, makamaka ochepetsa madzi, pang'onopang'ono amalimbikitsidwa ndikugwiritsa ntchito sing'anga ya konkriti yolimba, makamaka mu konkriti wopota, ndipo amakhala osasunthika. Monga Mallatora adanenanso za msonkhano woyamba wa ku Adretet Syretectimes: "Kukula ndi kugwiritsa ntchito kwa madzi othandiza kwambiri paukadaulo wa konkreti m'zaka za zana la 20." Panali kusokonekera kofunikira kwaukadaulo wowerengeka kwa zaka zonsezi, imodzi yomwe inali chitukuko cha mpweya mu 1940s, zomwe zinasintha nkhope ya ukadaulo wa konkriti ku North America;SuperplastizerKutsikira kwinanso kwakukulu komwe chidzathandiza kwambiri kupanga ndi kugwiritsa ntchito simenti kwa zaka zambiri zikubwera.

SuperplastizerM'mayiko ena amatchedwasuperplastizer, monga dzinalo, ndioyenera kukonza konkriti yokhazikika yokhazikika. Zachidziwikire, ndizoyenera kusakaniza zosakaniza zotsekemera zazikulu, kuchuluka kwakukulu kwamadzi ndi kuchuluka kwa madzi, ndiye kuti kupompa konkriti.

Komabe, kwa konkriti wina, monga konkriti wopangidwa ndi ma cydralic madamu, kukula kwakukulu kwa aggregate (mpaka 150mm), kutsika kwake sikwachikulu ndipo kumafunikira kuphatikizidwa Pogwiritsa ntchito kugwedezeka kwamphamvu kapena kugwedezeka komwe kumakulitsa, madzi otsika kwambiri mwina sangakhale oyenera. Kuti musunge kuchuluka kwa binder-binder osasinthika, kuti mukwaniritse magawo opanga ndalama zofunikira, muchepetse kugwiritsa ntchito madzi, ndikuchepetsa ma simenti kutsika kwamadzi. M'malo mwake, kugwiritsa ntchito kotereku ndikovuta, chifukwa konkriti konki ya Hydraulic imasakanikirana ndi mtundu wa madzi ocheperako, kuchepetsedwa kwa madzi ndi ochepa, ndipo chifukwa cha kuchuluka kwa mpweya, kotero Madzi akamamwa ndi kuchuluka kwa zinthu zochepetsedwa kumachepetsedwa nthawi yomweyo, ndiye kuti, pamene kuchuluka kwa malo otsekemera kumachepetsedwa, kumatha kukhalabe ndi malire. Kuonetsetsa kuti pali malo okwanira kudzaza kuphatikizira, kukulani ophatikizira ndikupereka malo oyenera ndikofunikira kuti kusakaniza ukhale wophatikizika utakula mutatha kutsanulira.

Kuphatikiza apo, mphamvu yovuta kwambiri yosakaniza ndi madzi okwanira ochepetsa kuti muchepetse kuchuluka kwa madzi zitha kukhala zolimba kwambiri, koma kuchuluka kwamphamvu kumakula, ndipo mosiyanasiyana, Ntchito yomanga migodi kapena bwalo lamilandu iyenera kukhala yochenjera ndi njira yochepetsera madzi. M'malo mwake, pokonzekera kuchuluka kwa C30 yomanga ya CACT ndi Injiniya Opanga Zachilengedwe (Ayenera Kugwiritsa Ntchito Zoposa 1/2) si chinthu chofunikira.