Tsiku Lotumiza: 26, Aug, 2024
1. Kupangidwa kwa mchere
Zinthu zazikuluzikulu ndizomwe zili mu C3A ndi C4AF. Ngati zomwe zili m'zigawozi ndizochepa, kugwirizana kwa simenti ndi madzi ochepetsera madzi kudzakhala kwabwino, pakati pawo C3A imakhala ndi mphamvu yowonjezereka pa kusinthasintha. Izi ndichifukwa choti chochepetsera madzi chimayamba kutsatsa C3A ndi C4AF. Kuonjezera apo, mlingo wa hydration wa C3A ndi wamphamvu kuposa C4AF, ndipo umawonjezeka ndi kuwonjezeka kwa simenti yabwino. Ngati zigawo zambiri za C3A zili mu simenti, zidzatsogolera mwachindunji ku madzi ochepa osungunuka mu sulphate, zomwe zimapangitsa kuchepa kwa ayoni a sulphate opangidwa.
2. Ubwino
Ngati simentiyo ndi yabwino, malo ake enieni adzakhala aakulu, ndipo zotsatira za flocculation zidzaonekera kwambiri. Kuti mupewe mawonekedwe a flocculation, kuchuluka kwa madzi ochepetsera kumafunika kuwonjezeredwa. Kuti mupeze zotsatira zokwanira zothamanga, m'pofunika kuwonjezera kugwiritsa ntchito madzi ochepetsera pamlingo wina. Muzochitika zachilendo, ngati simenti ndi yabwino, malo enieni a simenti ndi okwera kwambiri, ndipo chikoka cha madzi ochepetsera pamadzi odzaza simenti chidzawonjezeka, zomwe zimapangitsa kuti zikhale zovuta kuonetsetsa kuti madzi a phala la simenti ali ndi madzi. Choncho, pokonzekera konkire yokhala ndi chiŵerengero chapamwamba cha simenti ya madzi, chiwerengero cha madzi ndi malo chiyenera kuyang'aniridwa mosamala kuti zitsimikizire kuti simenti ndi zochepetsera madzi zimakhala ndi mphamvu zosinthika.
3. Kuyika ma particles a simenti
Chikoka cha simenti tinthu grading pa simenti kusinthika makamaka zimasonyeza kusiyana zili ufa wabwino mu particles simenti, makamaka zili particles zosakwana 3 microns, amene ali kwambiri mwachindunji kwambiri adsorption wa reducers madzi. Zomwe zili mu particles zosakwana 3 microns mu simenti zimasiyana kwambiri ndi opanga simenti osiyanasiyana, ndipo nthawi zambiri zimagawidwa pakati pa 8-18%. Pambuyo pogwiritsira ntchito mphero yotseguka, malo enieni a simenti asinthidwa kwambiri, omwe amakhudza kwambiri kusintha kwa simenti ndi zochepetsera madzi.
4. Kuzungulira kwa tinthu ta simenti
Pali njira zambiri zowonjezeretsa kuzungulira kwa simenti. Kale, tinthu tating'onoting'ono ta simenti nthawi zambiri tinkasindidwa kuti tipewe kugaya m'mphepete ndi kumakona. Komabe, muzochitika zenizeni zogwirira ntchito, kuchuluka kwa tinthu tating'onoting'ono ta ufa timawoneka bwino, komwe kumakhudza kwambiri ntchito ya simenti. Pofuna kuthetsa vutoli, teknoloji yozungulira zitsulo zozungulira zingagwiritsidwe ntchito mwachindunji, zomwe zingathe kusintha kwambiri spheroidization ya tinthu ta simenti, kuchepetsa kutayika kwa ntchito, ndi kufupikitsa nthawi yopera simenti. Pambuyo roundness wa simenti particles bwino, ngakhale zotsatira pa ano zimalimbikitsa mlingo wa madzi reducer si lalikulu kwambiri, akhoza kusintha koyamba fluidity simenti phala kwambiri. Chodabwitsa ichi chidzakhala chodziwika bwino pamene kuchuluka kwa madzi ochepetsera omwe amagwiritsidwa ntchito ndi ochepa. Komanso, pambuyo kuwongolera roundness wa simenti particles, ndi fluidity wa simenti phala angathenso bwino kumlingo.
5. Zosakaniza zosakaniza
Pogwiritsira ntchito simenti panopa m'dziko langa, zipangizo zina nthawi zambiri zimasakanizidwa pamodzi. Zinthu zosakanizidwazi nthawi zambiri zimaphatikizapo kuphulika kwa ng'anjo yamoto, phulusa lamoto, malasha gangue, ufa wa zeolite, miyala yamchere, ndi zina zotero. Pambuyo pochita zambiri, zatsimikiziridwa kuti ngati zochepetsera madzi ndi ntchentche zimagwiritsidwa ntchito ngati zipangizo zosakanikirana, kusinthika kwa simenti yabwino kungathe. kupezedwa. Ngati phulusa lamapiri ndi malasha amagwiritsidwa ntchito ngati zinthu zosakanikirana, zimakhala zovuta kupeza kusakanikirana kwabwino. Kuti mupeze zotsatira zabwino zochepetsera madzi, zochepetsera zambiri zimafunika. Ngati phulusa la ntchentche kapena zeolite zikuphatikizidwa muzinthu zosakanizika, kutayika pakuyatsa nthawi zambiri kumakhudzana mwachindunji ndi phulusa lamapiri. Kuchepa kwa kuwonongeka pakuyatsa, m'pamenenso kumafunika madzi ochulukirapo, ndipo m'pamenenso phulusa lachiphalaphala limakwera. Pambuyo poyeserera kwambiri, zatsimikiziridwa kuti kusinthika kwa zinthu zosakanizika kukhala simenti ndi chochepetsera madzi kumawonekera makamaka pazinthu izi: ① Ngati slag imagwiritsidwa ntchito m'malo mwa phala la simenti, phala la phala limakhala lamphamvu ngati m'malo kuchuluka. ② Ngati phulusa la ntchentche likugwiritsidwa ntchito mwachindunji m'malo mwa phala la simenti, madzi ake oyambira amatha kuchepetsedwa kwambiri zinthu zosinthira zitadutsa 30%. ③ Ngati zeolite imagwiritsidwa ntchito mwachindunji m'malo mwa simenti, ndizosavuta kuyambitsa kusakwanira kokwanira kwa phala. Munthawi yanthawi zonse, pakuwonjezeka kwa slag m'malo mwake, kusungika kwa simenti kumawonjezeka. Pamene ntchentche phulusa ukuwonjezeka, otaya imfa mlingo wa phala adzawonjezeka kumlingo wakutiwakuti. Pamene zeolite m'malo mlingo woposa 15%, kutayika kwa phala kudzakhala koonekeratu.
6. Zotsatira za mtundu wa admixture pa fluidity ya simenti phala
Powonjezera gawo lina la admixtures kuti konkire, ndi hydrophobic magulu admixtures adzakhala directional adsorbed padziko simenti particles, ndi magulu hydrophilic adzaloza ku yankho, potero mogwira kupanga ndi malonda adsorption filimu. Chifukwa cha mayendedwe adsorption zotsatira za admixture, pamwamba pa particles simenti adzakhala ndi mlandu wa chizindikiro chomwecho. Pansi pazifukwa zothamangitsirana, simentiyo ipanga kubalalitsidwa kwa kapangidwe ka flocculent pagawo loyambira la kuwonjezera madzi, kotero kuti mawonekedwe osunthika atha kumasulidwa m'madzi, potero kuwongolera kuchuluka kwamadzi am'madzi kumadzi ena. kuchuluka. Poyerekeza ndi zosakaniza zina, mbali yaikulu ya polyhydroxy asidi admixtures kuti akhoza kupanga magulu ndi zotsatira zosiyana pa unyolo waukulu. Nthawi zambiri, zosakaniza za hydroxy acid zimakhudza kwambiri kusungunuka kwa simenti. Pokonzekera ndondomeko yapamwamba-mphamvu konkire, kuwonjezera gawo lina la polyhydroxy asidi admixtures akhoza kukwaniritsa bwino kukonzekera zotsatira. Komabe, m'kati ntchito polyhydroxy asidi admixtures, ali ndi zofunika kwambiri pa ntchito ya simenti zopangira. Mu ntchito kwenikweni, osakaniza sachedwa kukhuthala ndi kukakamira pansi. Pogwiritsidwa ntchito pambuyo pake nyumbayi, imakhalanso ndi madzi amadzimadzi komanso stratification. Pambuyo pa kugwetsa, imakondanso kuuma, mizere ya mchenga, ndi mabowo a mpweya. Izi mwachindunji zokhudzana ndi zosagwirizana polyhydroxy asidi admixtures ndi simenti ndi mchere admixtures. Polyhydroxy acid admixtures ndi osakaniza omwe ali ndi vuto losinthika ndi simenti pakati pa mitundu yonse ya zosakaniza.
Nthawi yotumiza: Aug-26-2024
