Simenti ya Fly Ash Portland

Simenti ya Portland
Phulusa louluka Simenti ya Portland imatanthauza kuphatikiza kwa simenti ya Portland clinker ndi phulusa louluka, losakanizidwa ndi gypsum yoyenera kenako n’kuphwanyidwa, lolembedwa dzina la PF. Chilichonse chopangidwa ndi simenti ya Portland clinker, phulusa louluka ndi phulusa lofanana la gypsum chimatchedwa phulusa louluka. Simenti ya Portland, lolembedwa dzina la PF. Kuchuluka kwa phulusa louluka lomwe limawonjezeredwa ku simenti ndi 20% ~ 40% polemera, ndipo mphamvu zake ndi zofunikira zake pa msinkhu uliwonse ndizofanana ndi za simenti ya Portland slag.

Zopangira
Yapangidwa ndi clinker ya simenti ya Portland ndi phulusa la ntchentche, kusakaniza ndi gypsum yokwanira kenako n’kuphwanyika. Code PF
Chilichonse chopangidwa ndi simenti ya hydraulic yopangidwa ndi simenti ya Portland, phulusa la ntchentche ndi nthaka yoyenera ya gypsum chimatchedwa phulusa la ntchentche la Portland, lotchedwa PF. Kuchuluka kwa phulusa la ntchentche lomwe limawonjezeredwa ku simenti ndi 20% mpaka 40% pa kulemera. Limaloledwa kutenga nawo mbali mu slag ya ng'anjo yophulika ya granulated yosapitirira 1/3 ya kuchuluka kwa zinthu zosakanikirana. Pakadali pano, kuchuluka kwa zinthu zosakanikirana kumatha kufika 50%, koma kuchuluka kwa phulusa la ntchentche sikuyenera kukhala kochepera 20% kapena kupitirira 40%.
Mawonekedwe
Kapangidwe ka simenti ya phulusa la ntchentche ndi kokhuthala pang'ono, malo amkati mwake ndi ochepa, ndipo mphamvu yothira madzi ndi yochepa kwambiri, ndipo kufunikira kwa madzi a simenti ndi kochepa, kotero kuchepa kouma kwa simenti ya phulusa la ntchentche ndi kochepa, ndipo kukana kwa ming'alu nakonso ndi kochepa. Kuphatikiza apo, mofanana ndi simenti yonse yosakanikirana ndi zosakaniza zogwira ntchito, imakhala ndi kutentha kochepa komanso kukana dzimbiri mwamphamvu.
Magwiridwe antchito
Makhalidwe apadera a simenti ya Portland ash ndi awa:
(1) Mphamvu yoyambirira ndi yotsika, ndipo mphamvu yochedwa kukwera ndi yayikulu: mphamvu yoyambirira ya simenti ya phulusa ndi yotsika, ndipo mphamvu yoyambirira imachepa kwambiri ndi kuwonjezeka kwa kuchuluka kwa phulusa. Chifukwa chakuti thupi la vitreous mu phulusa ndi lokhazikika kwambiri, tinthu ta phulusa la ntchentche timawonongeka ndikuwonongeka pang'onopang'ono ndi Ca(OH)2 panthawi ya madzi a simenti ya phulusa, kotero kukula kwa mphamvu ya simenti ya phulusa la ntchentche kumaonekera kwambiri pamapeto pake. , kuchuluka kwake kochedwa kukwera ndi kwakukulu, ndipo kumatha kupitirira mphamvu yochedwa ya simenti yofanana ya Portland.
(2) Kugwira ntchito bwino komanso kuuma pang'ono: Popeza tinthu tambiri ta phulusa la ntchentche ndi totsekedwa komanso tolimba, ndipo malo amkati ndi madzi osungunuka ndi ochepa, simenti ya phulusa la ntchentche imakhala yogwira ntchito bwino komanso youma pang'ono. , ili ndi mphamvu yolimba komanso kukana ming'alu. Uwu ndi ubwino woonekeratu wa simenti ya phulusa la ntchentche.
(3) Kukana dzimbiri bwino: simenti ya phulusa la ntchentche imakhala ndi kukana dzimbiri kwambiri ku madzi abwino ndi sulfate. Chifukwa cha kuphatikiza kwa SiO2 yogwira ntchito mu phulusa la ntchentche ndi Ca(OH)2, calcium silicate hydrate imapangidwa ikalinganizidwa. Kuchuluka kofunikira (monga madzi a alkalinity) kumakhala kotsika kwambiri kuposa komwe kumafunikira kuti calcium silicate hydrate ikhale yofanana mu simenti ya Portland, kotero kuchuluka kwa madzi m'madzi abwino kumachepa kwambiri, motero kumawonjezera kukana simenti. Kutha kwa dzimbiri m'madzi abwino komanso kukana kuwonongeka kwa sulfate.
(4) Kutentha kochepa kwa madzi: Kuthamanga kwa madzi kwa simenti ya phulusa la ntchentche kumakhala kochedwa ndipo kutentha kwa madzi kumakhala kochepa, makamaka pamene kuchuluka kwa phulusa la ntchentche lowonjezeredwa kuli kwakukulu, kuchepetsa kutentha kwa madzi kumakhala koonekeratu.

Simenti ya Portland
Simenti yonse ya Portland clinker imapangidwa makamaka ndi calcium silicate, limestone kapena granulated blast furnace slag yokhala ndi zosakwana 5%, ndi zinthu zomangira za hydraulic zopangidwa ndi gypsum wophwanyidwa bwino zimatchedwa simenti ya Portland. Padziko lonse lapansi imadziwika kuti Portland Cement.
Kugawa
Simenti ya Portland imagawidwa m'mitundu iwiri, mtundu woyamba wa simenti ya Portland yopanda zinthu zosakaniza umatchedwa simenti ya Portland, code P·I; zinthu zosakaniza ndi miyala yamwala kapena granulated blast furnace slag yosapitirira 5% ya simenti imatchedwa II Type Portland simenti, code P·Ⅱ.
kapangidwe ka mchere
Michere yayikulu ya simenti ya Portland ndi: tricalcium silicate, dicalcium silicate, tricalcium aluminate, ndi tetracalcium ferric aluminate. Tricalcium silicate imatsimikiza mphamvu ya simenti ya Portland mkati mwa milungu inayi; dicalcium silicate imangogwiritsa ntchito mphamvu zake patatha milungu inayi, ndipo imafika pa mphamvu ya tricalcium silicate kwa milungu inayi pafupifupi chaka chimodzi; mphamvu ya tricalcium aluminate Imagwira ntchito mwachangu, koma mphamvu yake ndi yochepa, ndipo imagwira ntchito inayake pa mphamvu ya simenti ya Portland mkati mwa masiku 1 mpaka 3 kapena kuposerapo pang'ono; Mphamvu ya simenti yamchere ya asidi ndi yochepa.