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研究发现,在含微量氟的CaO-Al2O3-SiO2-BaSO4系统中,于1200~1350℃合成的含钡硫铝酸盐熟料,对低标号水泥具有促进凝结和提高早强的作用,将其与有机物复合后可制备一种对水泥早、后期强度具有显著增强作用的新型低碱度复合早强剂。采用XRD、SEM、压汞法、结合水测定等测试方法进行研究表明,水泥熟料矿物水化的加速,水化早期较多数量钙矾石的形成和水化产物间的较好连结,以及水泥石结构的致密化是水泥强度得以提高的主要原因。 相似文献
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采用Malvcrn激光法,并辅以X射线衍射(XRD)等现代测试技术,深入研究了汉川电厂和阳逻是厂两种粉煤灰的粉体特性,试验研究表明,Malvern激光粒度仪可准确,迅速测定粉煤灰粉体的粒径及其颗粒分布,从而可初步确定粉煤灰火山灰活性。 相似文献
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蒋永惠 《武汉理工大学学报(材料科学英文版)》1997,(3)
Composite function of chemical admixtureand technical wastes was applied to modify admixture of flyash and three kinds of ballast(called“FATB”for short).Theresults show that the modified FATB has the the characteristicsof early higher compressive strength,faster improvement of strength and higher freezing—thawing resistance. 相似文献
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粉煤灰颗粒分布与对水泥性能的影响 总被引:3,自引:0,他引:3
采用Malvern激光粒度法研究粉煤灰粉体性能对其活性及粉煤灰水泥性能的影响,以灰色系统理论探求粉煤灰颗粒分布与水泥强度的关系。研究结果表明:粉煤灰颗粒分布显著影响粉煤灰水泥的强度。粉煤灰中10~20μm颗粒含量对水泥强度影响最大。 相似文献
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In this paper,the cement clinkers fromvarious industrial kilns were investigated by a superposingpeaks method for X-ray quantitative analysis(XRQA)ofclinker minerals,the results show that the clinker mineralcontents measured by XRQA method better accord with thereality of clinkers made in different conditions than theo-retic contents calculated by Bouge formula do.The mea-sured contents of C_3S of clinkers manufactured in rotarykilns are higher than theoretically calculated values,where-as,the results of clinker manufactured in shaft kilns arecontrary to that.This is because in rotary kiln,the rawmeals are fully pre-heated and have high sintering temper-ature,the clinkers are well solid-solutioned and rapidlycooled,on the contrary,owing to the struetural defects,it iseasy to exist reduing atmosphere and lower temperature inshaft kiln,moreover the cooling rate is slower,all these canevidently lead to worse clinker quality.Adding CaF_2-Ca-SO_4 complex mineralizer can remarkably modify the sinter-ing situat 相似文献
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文章结合湖北娲石水泥股份有限公司机立窑生产实践,提出了加强窑体保温,改善生料易烧性,采取小料球煅烧技术及用高效节能型离心风机取代罗茨风机等节能降耗措施,并简要介绍了其节能降耗原理和实际效果通过上述措施,使机立窑标准煤耗降至123kg/t熟料,接近国家一级能耗标准,熟料28d抗压强度达到65MPa以上。 相似文献