排序方式: 共有156条查询结果,搜索用时 15 毫秒
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通过测定不同磷渣掺量时偏高岭土-矿渣地聚合物标准稠度用水量、凝结时间和抗压强度,研究磷渣对地聚合物性能的影响,并利用SEM、XRD分析碱激发地聚合物水化产物。结果表明:磷渣对复合地聚合物标准稠度用水量影响较小,当磷渣掺量由0增至50%,标准稠度用水量由0.34降至0.32;凝结时间随磷渣掺量增大而延长,磷渣掺量50%的试样初凝时间达84min;抗压强度随磷渣掺量增加先增大后减小,当磷渣掺量为25%时,28d抗压强度达到峰值65.5MPa。掺磷渣后地聚合物碱激发产物为无定形玻璃体,片层状产物与C-S-H凝胶交织在一起形成致密的结构。 相似文献
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In order to improve the thermal storage capacity of expanded vermiculite(EV) based formstable composite PCM(FS-PCM) via organic modification of EV, first, EV was modified with a sodium stearate(Na St) as surface modifier, and organic EV(OEV) with hydrophobicity and higher adsorption capacity for fatty acid was obtained. A novel capric-stearic acid eutectic(CA-SA)/OEV FS-PCM with high thermal storage capacity was then developed. OEV and CA-SA/OEV were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry(DSC), thermal gravimetry(TG), and thermal cycling test. Results showed that OEV has obvious hydrophobicity and a higher adsorption capacity for fatty acid. Its adsorption ratio has increased by 48.71% compared with that of EV. CA-SA/OEV possesses high thermal storage density(112.52 J/g), suitable melting temperature(20.49 ℃), good chemical compatibility, excellent thermal stability and reliability, indicating great application potential for building energy efficiency. Moreover, organic modification of inorganic matrix may offer novel options for improving its adsorption capacity for organic PCMs and increasing heat storage capacity of corresponding FS-PCMs. 相似文献
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采用磷渣为原料,通过合理的配料方案,成功制备了性能优异的水泥熟料。通过岩相观察和XRD分析结果表明,实验所用生料易烧性较好,并随温度提高而明显改善,所制备的水泥熟料的主晶相是C3S和C2S。 相似文献
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重点论述不同粉磨系统对水泥凝结时间的影响。带O-sepa选粉机的粉磨系统,其产品颗粒分布窄,微粉量少,对要求水泥凝结较快不利,为增加微粉量,应减少研磨体平均球径,适当降低磨内气体流速。 相似文献
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以低品位的石灰石为原料,通过合理的配料方案,成功制备了性能优异的水泥熟料。通过岩相观察和XRD分析结果表明,实验所用生料易烧性较好,并随温度提高而明显改善,所制备的水泥熟料的主晶相是C3S和C2S。 相似文献