Fly Ash Portland Cement

Portland Cement
Fly ashPortland simende inoreva musanganiswa wePortland simende clinker nemadota enhunzi, yakasanganiswa nehuwandu hwakakodzera hwegypsum uyezve pasi, codenamed PF. Portland simende, codenamed PF Kuwanda kwedota renhunzi rinowedzerwa kusimende i20% ~ 40% nehukuru, uye simba rayo regiredhi uye simba rinodiwa pazera rega rega rakafanana neiyo slag Portland simende.

Raw material
Yakagadzirwa nePortland simende clinker uyekubhururuka madota , yakavhenganiswa nehuwandu hwakakodzera hwegypsum uye ipapo ivhu. Kodhi PF
Chero hydraulic cementitious material yakagadzirwa nePortland simende clinker, fly ash uye huwandu hwakakodzera hwegypsum ground hunonzi fly ash Portland simende, codenamed PF Huwandu hwedota renhunzi rakawedzerwa kusimende i20% kusvika 40% nekuwanda. Inobvumirwa kutora chikamu mune granulated blast furnace slag isingapfuuri 1/3 yehuwandu hwehuwandu hwezvinhu zvakasanganiswa. Panguva ino, huwandu hwezvinhu zvakasanganiswa zvinogona kusvika 50%, asi huwandu hwemadota enhunzi hahufaniri kunge huri pasi pe20% kana kupfuura 40%.
Features
Chimiro chefly ash simenti chakaonda, iyo yemukati chaiyo nzvimbo idiki, uye adsorption yemvura idiki kwazvo, uye kudiwa kwemvura kwesimende hydration kudiki, saka kuoma kwe shrinkage yenhunzi simende idiki, uye kupesana nekutsemuka zvakare kwakaderera. kugona. Pamusoro pezvo, zvakafanana nesamende yakawanda yakasanganiswa neanoshanda admixtures, ine yakaderera hydration kupisa uye yakasimba ngura kuramba.
Performance
Iyo yakasarudzika zvimiro zvefly ash Portland simenti ndeiyi anotevera:
(1) Simba rekutanga rakaderera, uye kunonoka kwesimba kuwedzera mwero yakakura: simba rekutanga renhunzi simende yakaderera, uye simba rekutanga rinodzikira zvakanyanya nekuwedzera kwenhunzi madota. Nekuti iyo vitreous body iri muhunzi dota yakagadzikana zvakanyanya, nhunzi madota zvidimbu zvinonyungudutswa uye kuparadzwa zvishoma nezvishoma neCa(OH)2 panguva ye hydration ye fly ash simenti, saka kusimba kwesimba renhunzi simende kunonyanya kuratidzwa mune inotevera. stage. , simba rayo rinononoka kuwedzera mwero yakakura, uye inogona kutopfuura simba rekupedzisira reinowirirana Portland simende.
(2) Kushanda kwakanaka uye diki yakaoma shrinkage: Nekuti mazhinji enhunzi ash particles akavharwa uye akasimba spherical, uye nzvimbo yemukati uye imwe-morekuru adsorption mvura idiki, nhunzi ash simenti ine basa rakanaka uye diki yakaoma shrinkage. , ine hunhu hwekusimba kwesimba uye yakanaka kutsemuka kuramba. Iyi ndiyo mukana wakajeka we fly ash simenti.
(3) Yakanaka corrosion resistance: fly ash simenti ine high corrosion resistance kumvura yakachena uye sulfate. Nekuda kwekubatanidzwa kweSiO2 inoshanda mufly ash uye Ca (OH) 2, calcium silicate hydrate inogadzirwa kana yakaenzana. Iyo inodiwa yekumisikidza yekumisikidza (kureva liquid phase alkalinity) yakadzikira zvakanyanya pane inodiwa pakuenzana kwecalcium silicate hydrate mune yakajairwa Portland simende, saka mwero wekubuda mumvura yakachena wakadzikira zvakanyanya, nekudaro uchivandudza simende kuramba. Mvura yakachena yekuora simba uye kuramba kune sulfate kukuvara.
(4) Kupisa kwakaderera kwe hydration: Iyo hydration yekumhanya yefly ash simenti inononoka uye kupisa kwe hydration kwakaderera, kunyanya kana uwandu hwenhunzi hwakawedzerwa hwakakura, kuderedzwa kwekupisa kwemvura kunooneka.

Portland simende
Yese Portland simende clinker inonyanya kuumbwa necalcium silicate, limestone kana granulated blast furnace slag ine isingasviki 5%, uye hydraulic simende zvinhu zvakagadzirwa neyakatsetseka pasi gypsum zvinosanganiswa zvinonzi Portland simende. Pasi rose pamwe chete inozivikanwa sePortland Cement.
Classification
Portland simende yakakamurwa kuita mhando mbiri, mhando I Portland simende isina zvinhu zvakasanganiswa inonzi Portland simende, kodhi P · I; iyo yakasanganiswa zvinhu ne limestone kana granulated blast furnace slag isingadariki 5% yehuremu hwesimende inonzi II Type Portland simende, kodhi P·Ⅱ.
Mineral composition
Iyo huru yemaminerari ekuumbwa kwePortland simende ndeye: tricalcium silicate, dicalcium silicate, tricalcium aluminate, uye tetracalcium ferric aluminate. Tricalcium silicate inosarudza kusimba kwePortland simende mukati memavhiki mana; dicalcium silicate inongoshandisa simba rayo mushure memavhiki mana, uye inosvika pakusimba kwe tricalcium silicate kwemavhiki mana mukati megore; simba re tricalcium aluminate Inoita nekukurumidza, asi simba racho rakaderera, uye rinoita rimwe basa musimba rePortland simenti mukati me1 kusvika kumazuva matatu kana kuti zvishoma; Mupiro wesimba weasidhi munyu simende idiki.