Tsiku Lotumiza: 26, Feb, 2024
Makhalidwe a retarder:
Ikhoza kuchepetsa kutulutsidwa kwa kutentha kwa hydration kwa zinthu zamalonda za konkire. Monga tonse tikudziwira, kukula kwamphamvu koyambirira kwa konkire yamalonda kumagwirizana kwambiri ndi ming'alu ya konkire yamalonda. Kuthamanga koyambirira kumathamanga kwambiri ndipo kutentha kumasintha mofulumira, zomwe zingayambitse ming'alu ya konkire yamalonda, makamaka konkire yamalonda yamagetsi. Popeza kutentha kwamkati kwa konkire yamalonda kumakwera ndipo kumakhala kovuta kutayika, kusiyana kwakukulu kwa kutentha pakati pa mkati ndi kunja kudzachitika, zomwe zidzachititsa kuti pakhale ming'alu ya konkire yamalonda, zomwe zidzakhudza kwambiri khalidwe la konkire yamalonda. Zimakhudza khalidwe la konkire yamalonda. Commercial konkire retarder ingathandize bwino izi. Ikhoza kulepheretsa kutentha kwa kutentha kwa kutentha kwa hydration, kuchepetsa kutentha kwa kutentha ndi kuchepetsa kutentha kwapamwamba, kuteteza bwino kuti ming'alu ya konkire ikhale yoyambirira.
Ikhoza kuchepetsa kugwa kwa konkire yamalonda. Zochita zawonetsa kuti atha kukulitsa kwambiri nthawi yoyambira ya konkriti yamalonda. Pa nthawi yomweyi, nthawi yapakati pakati pa kukhazikitsidwa koyambirira ndi komaliza komaliza kwa konkire yamalonda imakhalanso yaifupi, yomwe sikuti imachepetsa kutayika kwa konkire, koma sikukhudza mphamvu yoyambirira ya konkire yamalonda. wonjezani. Ili ndi phindu labwino ndipo imagwiritsidwa ntchito mochulukira pomanga konkriti yamalonda.
Zotsatira pa mphamvu. Kuchokera pakuwona kukula kwa mphamvu, mphamvu yoyambirira ya konkire yamalonda yosakanikirana ndi retarder ndi yochepa kusiyana ndi konkire yosakanizidwa, makamaka mphamvu za 1d ndi 3d. Koma nthawi zambiri pakadutsa masiku 7, awiriwo amatha pang'onopang'ono, ndipo kuchuluka kwa retarder kuwonjezeredwa kumawonjezeka pang'ono.
Kuphatikiza apo, kuchuluka kwa coagulant komwe kumaphatikizidwa mumtengo kumawonjezeka, mphamvu zoyambirira zimachepa kwambiri ndipo kuwongolera mphamvu kumatenga nthawi yayitali. Komabe, ngati konkire yamalonda ikusakanikirana kwambiri ndipo nthawi yokhazikika ya konkire yamalonda ndi yaitali kwambiri, kutuluka kwa nthunzi ndi kutaya madzi kumayambitsa zotsatira zosatha komanso zosasinthika pa mphamvu ya konkire yamalonda.
Kusankhidwa kwa retarder:
① Konkire yazamalonda ndi konkire yazamalonda yothiridwa mosalekeza pa kutentha kwakukulu nthawi zambiri imatsanuliridwa m'magulu chifukwa chazovuta za kuthira kamodzi kapena zigawo zokhuthala. Kuonetsetsa kuti zigawo zapamwamba ndi zapansi zimagwirizanitsidwa bwino musanakhazikitsidwe koyambirira, konkire yamalonda ikufunika Imakhala ndi nthawi yayitali yokhazikika komanso yochepetsetsa bwino.
Kuonjezera apo, ngati kutentha kwa hydration mkati mwa konkire yamalonda sikuyendetsedwa bwino, ming'alu ya kutentha idzawonekera, yomwe idzachepetse kutentha kwa kutentha. Zomwe zimagwiritsidwa ntchito nthawi zambiri zochepetsera madzi, zolepheretsa, komanso zochepetsera madzi, monga citric acid.
② Konkire yamalonda yamphamvu kwambiri nthawi zambiri imakhala ndi mchenga wocheperako komanso simenti yocheperako yamadzi. Kuphatikizika kolimba kumakhala ndi mphamvu zambiri komanso simenti yayikulu. Izi zimafuna kuchuluka kwa simenti komanso kugwiritsa ntchito njira zochepetsera madzi. Kuphatikiza apo, othandizira ochepetsera madzi akufunikanso. Zingabweretse phindu linalake lazachuma.
Mlingo wochepetsera madzi wa ochepetsa madzi amphamvu kwambiri nthawi zambiri amakhala 20% mpaka 25%. Mankhwala omwe amagwiritsidwa ntchito kwambiri pochepetsa madzi ku China ndi Nye series. Mankhwala ochepetsera madzi amphamvu kwambiri nthawi zambiri amawonjezera kugwa, motero amagwiritsidwa ntchito limodzi ndi oletsa kuwongolera kuti azitha kugwira ntchito bwino komanso kuchepetsa kutayika kwa madzi pakapita nthawi.
③ Kupopera kumafuna konkire yamalonda kuti ikhale ndi madzimadzi, osasankhana, osatulutsa magazi, komanso zinthu zotsika kwambiri zomwe zimafunidwa ndi ndondomekoyi ndikuwonetsetsa mphamvu. Chifukwa chake, kuphatikizika kwake ndikwambiri kuposa konkriti wamba wamba. Khalani okhwima. Pali zambiri zomwe zilipo:
Phulusa la Fly: Imachepetsa kutentha kwa hydration ndikuwongolera mgwirizano wa konkriti wamalonda.
Wamba wochepetsera madzi: monga mtengo wa calcium wochepetsera madzi, womwe ungapulumutse simenti, kuonjezera madzimadzi, kuchedwetsa kutulutsa kutentha kwa hydration, ndikuwonjezera nthawi yoyambira.
Pumping agent: Ndi mtundu wa fluidizing wothandizira omwe amatha kusintha kwambiri madzi a konkire yamalonda, kuwonjezera nthawi yosungira madzi, ndi kuchepetsa kutaya kwa nthawi. Monga momwe dzinalo likusonyezera, ndi chosakaniza chomwe chimapangidwira kupopera. Zida zochepetsera madzi komanso zopatsira mpweya zitha kugwiritsidwanso ntchito mu konkire yamalonda yopopa, koma sagwiritsidwa ntchito nthawi zambiri.
Nthawi yotumiza: Feb-26-2024
