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1、第33卷第2期非金屬礦Vlo1.33NO.2201O年3月NOn.MetalIiCMi1esMarch,2010電廠脫硫石膏粉在水泥基膠凝材料中的復(fù)合效應(yīng)譚平王海云劉家祥(1北京京北職業(yè)技術(shù)學(xué)院,北京101400;2北京懷信建材檢驗有限責(zé)任公司,北京101400;3北京化工大學(xué)化工資源有效利用國家重點實驗室,材料科學(xué)與工程學(xué)院,北京100029)摘要研究了脫硫石膏粉對水泥基膠凝材料性能的復(fù)合效應(yīng)結(jié)果表明:脫硫石膏一水泥復(fù)合膠凝材料的體積安定性良好,初凝時間明顯延長,終凝時間和標(biāo);隹稠度用水量略有增加
2、。脫硫石膏一水泥膠砂水化時,一部分脫硫石膏參與水泥水化反應(yīng)生成鈣礬石晶體,其余的脫硫石膏顆粒起微集料的填充作用。大量的脫硫石膏超細(xì)顆粒均勻分散在漿體中,填充并細(xì)化了毛細(xì)孔和孔隙,改善了膠砂的孔結(jié)構(gòu),提高了膠砂密實度。通過不同齡期的凈漿試件的XRD圖譜,表明脫琉石膏.水泥復(fù)合膠凝材料的水化產(chǎn)物主要是c.s_H凝膠、鈣礬石和二水硫酸鈣:關(guān)鍵詞脫硫石膏膠凝材料強(qiáng)度水化機(jī)理中圖分類號:TQ172.4+4文獻(xiàn)標(biāo)識碼:A文章編號:1000-8098(2010)02-0039—03HydratingandHard
3、eningMechanismofCompositeMadefromDesuIphurizati0nGypsumandCementTanPingWangHaiyunLiuJiaxiang(1BeijingJingbeiVocationalCollege,Beijing101400;2BeijingHuaixinBuidingMaterialCo.Ltd,Beijing101400;3TheStateKeyLaboratoryofChemicalResourceEngineering,Collegeof
4、MaterialsScienceandEngineering,BeijingUniversityofChemicalTechnologNBeijing100029)AbstractThisarticlestudiedtheinfluenceofdesulphurizationgypsumpowderontheperformancesofcementbasedbindingmaterials.Theresultsindicatedthatthesoundnessofthedesulphurizatio
5、ngypsumandcementbindingmaterialsisgood;thelatersexingtimeofthatlengthensverymuch;theearliersettingtimeandwaterconsumptionforstandardconsistencyofthataddalittle.Whenthemicellaeofdesulphurizationgypsumandcementhydrates,apartofdesulphurizationgypsumreacts
6、withcementandproducesetringitecrystal,andapartofthatfillsintheasthemicro—aggregate.NumberlessX—smallspheresdesuIphurizationgypsumdispersesuniformlyintheslurry;andfillsinandthiningstheporesandholes;andimprovesthestructureoftheholein;andraisesthecompactn
7、essofthemicetlae.TheXRDpatternsofvariantagepastessamplesindicatethatthehydrationproductsofcompositeusingdesulphurizationgypsumandcementaremainlytobermorite,ettringiteanddihydrategypsum.Keywordsdesulphurizationgypsumbindingmaterialstrengthhydratingmecha
8、nism脫硫石膏是石灰石-石膏濕法脫硫工藝產(chǎn)生的成分及附著水、結(jié)晶水和酸不溶物的含量(WP/o)為:副產(chǎn)物,主要成分為二水硫酸鈣CaSO4.2H,O【】]。目CaO,28.75;MgO,0.22;Fe2O”0.29;A1,O”2.5;MnO,前我國已投入運(yùn)行的煙氣脫硫機(jī)組所產(chǎn)生的脫硫石<0.004;TiO”0.06;Na20,0.1;K2O,0.065;SiO4.41;膏的利用率還很低,大部分仍以堆存為主,已成為繼F,0.34;P20,0.054;SO,42.89;C