共查询到19条相似文献,搜索用时 78 毫秒
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机械激发对钢渣矿渣微粉活性的影响 总被引:2,自引:0,他引:2
将比表面积为400、450、500 m2/kg的钢渣粉进行活性指数试验,并将比表面积为450 m2/kg的钢渣粉与400、450、500 m2/kg三种矿渣粉复合,研究钢渣矿渣复合微粉的活性。试验结果表明:比表面积为500 m2/kg的钢渣粉活性可达一级粉要求。钢渣和矿渣比表面积为450 m2/kg,钢渣掺量在复合微粉为20%~30%时,复合微粉活性可达到或接近S95级,可满足混凝土结构强度设计要求。同时,对复合微粉水化产物微观形貌进SEM观察,以判断复合微粉的水化情况。 相似文献
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碱矿渣的复合活性激发剂试验研究 总被引:2,自引:0,他引:2
本文采用正交设计试验方法,研究了在石膏+粉煤灰+复合碱性激发剂的激发下,比表面积450m^2/kg的矿渣28d强度达到59.0MPa以上。并论述了三种组分对碱矿渣的激发作用,对碱矿渣综合利用具有一定指导意义。 相似文献
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戴银所 《混凝土与水泥制品》2001,(5):15-16
经球磨机粉磨的矿渣微粉在掺入5%的硅灰或未掺硅灰情况下,再经振动磨处理5分钟,10分钟和20分钟,试验测定了各种矿渣微粉细度和抗压强度的变化,分析了机械活化的作用。 相似文献
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通过试验,探讨了化学激发作用对磨细矿渣活性的影响,采用CaO,NaOH,KAl(SO4)2·12H2O,Na2SO4四种化学试剂,主要研究了不同化学试剂对磨细矿渣不同的试验效果,为类似研究奠定了基础。 相似文献
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Mechanical and leaching behaviour of slag-cement and lime-activated slag stabilised/solidified contaminated soil 总被引:2,自引:0,他引:2
Stabilisation/solidification (S/S) is an effective technique for reducing the leachability of contaminants in soils. Very few studies have investigated the use of ground granulated blast furnace slag (GGBS) for S/S treatment of contaminated soils, although it has been shown to be effective in ground improvement. This study sought to investigate the potential of GGBS activated by cement and lime for S/S treatment of a mixed contaminated soil. A sandy soil spiked with 3000 mg/kg each of a cocktail of heavy metals (Cd, Ni, Zn, Cu and Pb) and 10,000 mg/kg of diesel was treated with binder blends of one part hydrated lime to four parts GGBS (lime-slag), and one part cement to nine parts GGBS (slag-cement). Three binder dosages, 5, 10 and 20% (m/m) were used and contaminated soil-cement samples were compacted to their optimum water contents. The effectiveness of the treatment was assessed using unconfined compressive strength (UCS), permeability and acid neutralisation capacity (ANC) tests with determination of contaminant leachability at the different acid additions. UCS values of up to 800 kPa were recorded at 28 days. The lowest coefficient of permeability recorded was 5 × 10− 9 m/s. With up to 20% binder dosage, the leachability of the contaminants was reduced to meet relevant environmental quality standards and landfill waste acceptance criteria. The pH-dependent leachability of the metals decreased over time. The results show that GGBS activated by cement and lime would be effective in reducing the leachability of contaminants in contaminated soils. 相似文献
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钢渣-矿渣复合微粉的活性试验研究 总被引:6,自引:0,他引:6
研究了改变钢渣与矿渣微粉比例以及钢渣微粉比表面积对混合材的机械激发性能,同时考察了自行研制的KYH-8、KYH-9和KYH-10三种激发剂对复合微粉的化学激发,并通过X射线衍射(XRD)、偏光显微(PLM)和电子扫描电镜(SEM)对复合微粉材料进行了结构分析.试验结果表明,复合渣微粉中钢渣的比例越大,钢渣矿渣复合粉的活性越低;钢渣微粉比表面积在400~500m2/kg时,钢渣微粉细度增加,复合微粉活性有所提高;复合微粉在早期只是填充于水泥石之间,起填充剂的作用,后期逐渐水化;0.01 mol/L KYH-10激发剂对钢渣与矿渣微粉比例为3:2的复合微粉激发效果表现最佳,复合微粉7d活性指数达到85%以上,28 d活性指数可以达到104%. 相似文献
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矿渣微粉在水泥混凝土中应用的概述 总被引:41,自引:0,他引:41
蒋家奋 《混凝土与水泥制品》2002,(3):3-6
对用作混凝土掺合料的矿渣微粉的主要技术条件与矿渣微粉混凝土的主要性能特征作了简要的介绍。对矿渣微粉用于混凝土中的工作机理进行了探讨。最后提出矿渣微粉在水泥制品生产中应得到开发应用。 相似文献
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