To accelerate the early strength of lime-flyush stabilized soil for extending its further uses in highway and shortening highway constraction time, five kinds of chemical odditives were chosen on the basis of mechanis...To accelerate the early strength of lime-flyush stabilized soil for extending its further uses in highway and shortening highway constraction time, five kinds of chemical odditives were chosen on the basis of mechanism analysis of accelerating early strength in highway as a semi-rigid base materhd, and a series of experiments about the effect of differeat kinds of additives and quantity on the early strength of the stabilized soll were tested. The results show that chemical additives can efftciently improve the early strength of lime-flyush stabilized soil both the 7 d and 28d, and the optimum quantity for above chemical additive is 1.5%-2.5% approximately. Some suggestions for the practical construction were also proposed.展开更多
This article discusses the flyash mechanical properties and analyzes stability of two flyash dams under earthquake by finite element methods. It is studied whether the mixture of flyash and clay can be used as the fil...This article discusses the flyash mechanical properties and analyzes stability of two flyash dams under earthquake by finite element methods. It is studied whether the mixture of flyash and clay can be used as the fill for a dam located in an earthquake region.展开更多
A large amount of waste is produced by preparation plants. The properties of the waste vary depending on the mineralogical contents of the mother rock in which the coal is embedded. The waste quality depends on the me...A large amount of waste is produced by preparation plants. The properties of the waste vary depending on the mineralogical contents of the mother rock in which the coal is embedded. The waste quality depends on the method of mining and cleaning. The waste mainly consists of clays, quartz, carbonaceous materials, mica, pyrites, and so on. About 80% of coal-ash is now utilized and the remainder is disposed of at disposal sites. However, the life span of disposal sites is limited, and it is difficult to find new disposal sites. It is therefore requested that the percentage of utilized flyash be increased in all applicable fields in Japan. Thus, it is very desirable that cement supplemented with flyash be used as injection material for natural/artificial openings. With this perspective in mind, we attempt to clarify how much the size and shape of the flyash affects the properties of the injection mixture by way of an injection test.展开更多
In the current study,the effect of flyash(FA)on the physic-mechanical,electrical,thermal and morphological behavior of nylon-66(PA)was inves-tigated.PA/FA composites were prepared by melt mixing via twin screw ex-trud...In the current study,the effect of flyash(FA)on the physic-mechanical,electrical,thermal and morphological behavior of nylon-66(PA)was inves-tigated.PA/FA composites were prepared by melt mixing via twin screw ex-truder,with varying weight percent(5 wt%,10 wt%,15 wt%and 20 wt%)of flyash.The results of composites were optimized and compared with vir-gin nylon-66.Mechanical and electrical properties of composites improved up to 10 wt%of FA loading without compromising the properties.The fly-ash filled nylon-66 composites showed a low abrasive wear rate.Increase the heat distortion temperature of composites with an increase in weight percent of flyash while opposing the melt flow rate.Flyash filler enhances the stiffness of plastics but significantly reduces the impact properties.Dis-persion of flyash was examined by impact fracture surface of composites using a scanning electron microscope.展开更多
The physical,chemical and mineral facies properties of the flyash from Xiezhuang Coal Refuse Fired Power Plant have been studied by means of naked eyes,microscope,chemical composition analysis and XRD analysis,and com...The physical,chemical and mineral facies properties of the flyash from Xiezhuang Coal Refuse Fired Power Plant have been studied by means of naked eyes,microscope,chemical composition analysis and XRD analysis,and compared with that of the flyash from Taian Coal Fired Power Plant.The result shows that the flyash from coal refuse fired power plant is of better quality in making construction items,for being brighter in color,fine and high activity.Some ways of comprehensive utilization of the ash have been suggested in this paper.展开更多
基金Projects(52274128, 51904167, 52174159) supported by the National Natural Science Foundation of ChinaProject supported by the Taishan Scholars Project Special Fund of Shandong Province,China+1 种基金Project(KCF2204) supported by the Open Fund for the Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources,ChinaProject(22KF01) supported by the Open Fund for the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,China。
文摘To accelerate the early strength of lime-flyush stabilized soil for extending its further uses in highway and shortening highway constraction time, five kinds of chemical odditives were chosen on the basis of mechanism analysis of accelerating early strength in highway as a semi-rigid base materhd, and a series of experiments about the effect of differeat kinds of additives and quantity on the early strength of the stabilized soll were tested. The results show that chemical additives can efftciently improve the early strength of lime-flyush stabilized soil both the 7 d and 28d, and the optimum quantity for above chemical additive is 1.5%-2.5% approximately. Some suggestions for the practical construction were also proposed.
文摘This article discusses the flyash mechanical properties and analyzes stability of two flyash dams under earthquake by finite element methods. It is studied whether the mixture of flyash and clay can be used as the fill for a dam located in an earthquake region.
文摘A large amount of waste is produced by preparation plants. The properties of the waste vary depending on the mineralogical contents of the mother rock in which the coal is embedded. The waste quality depends on the method of mining and cleaning. The waste mainly consists of clays, quartz, carbonaceous materials, mica, pyrites, and so on. About 80% of coal-ash is now utilized and the remainder is disposed of at disposal sites. However, the life span of disposal sites is limited, and it is difficult to find new disposal sites. It is therefore requested that the percentage of utilized flyash be increased in all applicable fields in Japan. Thus, it is very desirable that cement supplemented with flyash be used as injection material for natural/artificial openings. With this perspective in mind, we attempt to clarify how much the size and shape of the flyash affects the properties of the injection mixture by way of an injection test.
文摘In the current study,the effect of flyash(FA)on the physic-mechanical,electrical,thermal and morphological behavior of nylon-66(PA)was inves-tigated.PA/FA composites were prepared by melt mixing via twin screw ex-truder,with varying weight percent(5 wt%,10 wt%,15 wt%and 20 wt%)of flyash.The results of composites were optimized and compared with vir-gin nylon-66.Mechanical and electrical properties of composites improved up to 10 wt%of FA loading without compromising the properties.The fly-ash filled nylon-66 composites showed a low abrasive wear rate.Increase the heat distortion temperature of composites with an increase in weight percent of flyash while opposing the melt flow rate.Flyash filler enhances the stiffness of plastics but significantly reduces the impact properties.Dis-persion of flyash was examined by impact fracture surface of composites using a scanning electron microscope.
文摘The physical,chemical and mineral facies properties of the flyash from Xiezhuang Coal Refuse Fired Power Plant have been studied by means of naked eyes,microscope,chemical composition analysis and XRD analysis,and compared with that of the flyash from Taian Coal Fired Power Plant.The result shows that the flyash from coal refuse fired power plant is of better quality in making construction items,for being brighter in color,fine and high activity.Some ways of comprehensive utilization of the ash have been suggested in this paper.
