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20231012 Cite https://doi/10.1016/j.conbuildmat.2023.132646Get rights and content Highlights Coal gangue sand will weaken the adhesion performance of the 2021118 Coal gangue fine crushing and sand making machine: it can crush and make sand through the plate hammer impact of the rotor, which can be finely crushed and formed at one time, and...Can coal gangue be used to make sand? LinkedIn20231012 , Jupeng Tang a b Add to Mendeley https://doi/10.1016/j.conbuildmat.2023.132646 Get rights and content Abstract To Comparative study on mechanical and environmental properties of coalاحصل على السعر
2022626 According to the content of oxide in coal gangue, coal gangue can be divided into clay gangue (SiO 2 (40–70%), Al 2 O 3 (15–30%)), sandstone gangue (SiO 2 > 70%), aluminum gangue (Al 2 O 2022121 1. Introduction Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the Exploring calcined coal gangue fines as the total substitute 202151 Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal Review of Coal Gangue Characteristics and Ecological احصل على السعر
2021125 The coal gangue used as coarse aggregates in the following test was collected from a coal mine in Binxian, Shaanxi province, China, as shown in Fig. 1. The coal gangue was crushed and sieved according to GB/T 14685-2011 [32] for the preparation of ordinary concrete. The particle size of the sieved coal gangue coarse aggregates was in 2021125 In most of the studies on coal gangue concrete from the aspect of material, 50% coarse aggregate replacement ratio was commonly used as the maximum replacement ratio whilst 100% coarse aggregate replacement ratio was also investigated by some researchers [8].Since the aim of this study is to maximize the application efficiency of Utilization of coal gangue as coarse aggregates in structural 202168 When compared with the uncalcined coal gangue, it can be found that the surface of the calcined coal gangue particles is more rough and uneven. This Standard sand (GB/T 17671-1999 [26]) was used to prepare the cement mortar and a cement to sand ratio of 1:3 was used. During Table 1. Chemical compositions of the cement, CG and FA EFFECTS OF COAL GANGUE ON THE SULFATE ATTACK احصل على السعر
2021113 The tailings of metal mines and coal gangue from coal mines should be utilized following the requirements of “Reduction, Resource Utilization, and Reuse.“ (3) Metal-mine tailings should be processed by processing-tailings fine powder as cement mixture, concrete, and mortar admixtures. Tailings can also be used to make aerated 202365 In this study, the gangue and fine sand are used as the filling aggregates, and the uniaxial compression test and acoustic wave test are conducted in the cementitious gangue-sand filling body with different gangue-sand ratio. The results show that the longitudinal wave velocity of the filling body is basically between 1.556 km/s and 2.413 Study on Sound Propagation Performance of Mechanized Coal Gangue 20201130 The addition of 0.3% PET fiber can effectively increase the flexural strength of coal gangue fine aggregate concrete, which is 6.7% higher than that of CGC-5. However, when the fiber content increased from 0.3% to 0.5%, the compressive strength of concrete was reduced by about 8.1% compared with that of CGC-5.Study on Mechanical Properties of PET Fiber-Reinforced Coal Gangue احصل على السعر
2020620 Waste coal gangue can also be used in agriculture and other industries (Li and Wang, 2019). Ding et al. (2017) The fine aggregates was a hybrid of crushed coal gangue and medium sand (river sand excavated in Xuzhou, China) with a fineness modulus of 2.58. The particle size of river sand used in this test was ranged from 0.25 to 1.25 mm.2023324 Using coal gangue as subgrade filler can not only solve the environmental problems of coal mine waste accumulation but also decrease the subgrade cost, which has important theoretical and practical significance. A series of cyclic triaxial tests was carried out using the large-scale dynamic and static triaxial apparatus (LSDSTA) to investigate Permanent Deformation and Its Unified Model of Coal Gangue 20231022 、 Sand making from coal gangue meets the requirements of sand use. Advantages of coal gangue sand compared with natural sand; ① As a raw material for sand making, coal gangue has large reserves and is easy to obtain, and the government supports its development and utilization; ② Coal gangue is angular and sharp, and contains moreCan coal gangue be used to make sand? Fodamon Machineryاحصل على السعر
2021728 Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue, which eventually results in ecological2023919 At present, the cumulative storage of coal gangue in China exceeds 7 billion tons, covering an area of approximately 70 km2. The engineering application of unburned coal gangue is mainly utilized as concrete aggregate or cement production after the overfire process. However, it is prone to environmental pollution and has limited Road Performance Evaluation of Unburned Coal Gangue in 2022418 The results showed the following: (1) Optimized formulation could be achieved at coal gangue powder: slag: fly ash ratio of 5:4:1, 1.64 M sodium silicate modulus, 6.7% sodium silicate and 5% Na 2 O. The LCGGM possesses clean production, high fluidity, fast setting, low bleeding rate, high compressive strength and seepage pressure, Preparation of coal gangue-slag-fly ash geopolymer احصل على السعر
202361 The flexural properties of concrete beams prepared from coal gangue aggregate were investigated in this study. Four-point bending tests were conducted on 11 beams with different values of the coal gangue replacement rate, steel fiber volume content, rebar ratio, and beam height. The measured failure modes, load-deflection curves, 2022121 1. Introduction. Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the production of 1 t coal generates 0.1–0.25 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3].The coal gangue not only occupies Exploring calcined coal gangue fines as the total substitute 2023225 In this experiment, the influence of coal gangue as the admixture on the performance of dry-mixed mortar was studied, and the results were analyzed by XRD and SEM. The effects of different ways of crushing, particle size distribution, coal gangue, cement, admixture, and water content on the water retention, consistency, and 7 d Experimental Study on Preparation of Dry-Mixed Mortar from Coal Gangueاحصل على السعر
