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interval and grading dose ratio were investigated. The results show that grading addition not only reduces the effluent turbidity, but also increases floc size and loosens floc structure. The turbidity... with looser structure and larger size is formed easily. When the grading dose ratio is 4/8, the lowest turbidity achieves 1.81 NTU, which is about 40.85% lower than that of the conventional coagulation......
61.8 mm,高为40 mm的取土环刀插入试样中,敲击环刀使其压入试样内.拆卸装样筒,将环刀周围多余的矿样削除,测定环刀和试样的总质量,记录于表2. 图1 试验矿样粒级组分及含量比例 Fig. 1 Concentration of sample size and content of test sample 表1 试样配比及特征参数 Table 1 ... and Technology Beijing, Beijing 100083, China) Abstract: During the leaching of weathered crust elution-deposited rare earth ore, the grain grading is the key factor affecting the permeability of ore......
microstructure, total porosity, and pore size distribution. Then, a grading index (GI) formula for mixed aggregates based on maximum density curve theory was derived, grading curves were plotted, and GI... the grading index (GI) of mixed aggregate, and studied the relationship among GI, pore structure, and strength to describe the cross-scale characteristics of backfill, which is made from stone powder......
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aggregate particle size grading of a coal mine in Xinyang City was gained. The formula for defining the critical diameter of non-subsidence aggregate in slurry was established, and the critical...; % 表2 充填材料的粒径级配特征指标 Table 2 Characteristic indexes of size grading of filling material......
; 文献标志码:A 文章编号:1672-7207(2015)07-2613-07 Characteristic of triaxial compressive strength of grading macadam considering loading velocity zhou Kefeng, li Yuzhi (School of Communication and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China) Abstract: The mechanical characteristic of the grading......
Size effect of sandstone after high temperature under uniaxial compressionSU Hai-jian(苏海健)1, JING Hong-wen(靖洪文)1, MAO Xian-biao(茅献彪)1, ZHAO Hong-hui(赵洪辉)1, YIN Qian(尹乾)1, WANG Chen(王辰)2(1. State Key... the size effect and its evolution. The test results show that the density, longitudinal wave velocity, peak strength, average modulus and secant modulus of sandstone decrease with the increase......
Indentation size effect in microhardness measurements of Hg1-xMnxTe WANG Ze-wen(王泽温)1, 2, 3, JIE Wan-qi(介万奇)2, WANG Xiao-qin(汪晓琴)4 1. School of Materials Science...; Abstract: The effect of surface damaged layer and Te enrichment layer of Hg1-xMnxTe on the indentation size were studied experimentally. Based on the results, the indentation size effect (ISE......
on the basic principles of statistics, two grading parameters of average particle size and particle dispersion coefficient were established. Then, according to the segregation test results, the average... in the mixed aggregate filling slurry of Jinchuan mine waste rock and sanding, the segregation of slurry was controlled by optimizing the particle size distribution of mixed aggregate. Firstly......
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