地质材料(英文)最新文献_第2页

Calibration of Four Nonlinear Failure Envelopes from Triaxial Test Data and Influence of Nonlinearity on Geotechnical Computations 基于三轴试验数据的四种非线性破坏包络的校正及非线性对岩土计算的影响

地质材料(英文) Pub Date : 2021-04-01 DOI: 10.4236/GM.2021.112003

A. J. Anyaegbunam, F. Okafor

引用次数: 0

Multicomponent Ore Mineralization in Ultrabasites of the Ospa-Kitoy Massif of the East Sayan Ophiolite Belt: Formational Parageneses and Origin (Diamond, Nephrite, Noble Metals, Chromium, Nickel) 东萨延蛇绿岩带奥帕-基托伊地块超基岩多组分矿石成矿作用:形成副长岩及其成因(金刚石、软玉、贵金属、铬、镍)

地质材料(英文) Pub Date : 2021-01-01 DOI: 10.4236/gm.2021.114005

A. V. Tatarinov, L. I. Yalovik

引用次数: 0

Coupling Discriminating Statistical Analysis and Artificial Intelligence for Geotechnical Characterization of the Kampemba’s Municipality Soils (Lubumbashi, DR Congo) Kampenba市（刚果民主共和国卢本巴希）土壤岩土工程特征的耦合判别统计分析和人工智能

地质材料(英文) Pub Date : 2020-04-26 DOI: 10.4236/gm.2020.103003

Kavula Ngoy Elysée, Kasongo wa Mutombo Portance, L. Sow, Ngoy Biyukaleza Bilez, Kavula Mwenze Corneille, Tshibwabwa Kasongo Obed

{"title":"Coupling Discriminating Statistical Analysis and Artificial Intelligence for Geotechnical Characterization of the Kampemba’s Municipality Soils (Lubumbashi, DR Congo)","authors":"Kavula Ngoy Elysée, Kasongo wa Mutombo Portance, L. Sow, Ngoy Biyukaleza Bilez, Kavula Mwenze Corneille, Tshibwabwa Kasongo Obed","doi":"10.4236/gm.2020.103003","DOIUrl":"https://doi.org/10.4236/gm.2020.103003","url":null,"abstract":"This study focuses on the determination of physical and mechanical characteristics based on in vitro tests, by using field samples for the Kampemba urban area in the city of Lubumbashi. At the end of this study, we identified the soils according to their parameters, and established the geotechnical classification by determining their bearing capacity by the group index method using from the identification tests carried out. By using the AASHTO classification method (American Association for State Highway Transportation Official), the results obtained after our studies revealed five classes of soil: A-2, A-4, A-5, A-6, A-7 in a general way, and particularly eight subgroups of soil: A-2-4, A-2-6, A-2-7, A-4, A-5, A-6, A-7-5 and A-7-6 for the concerned area. The latter has given statistical analysis and deep learning based on multi-layer perceptron, the global values of the physical parameters. It’s about: 31.77% ± 1.05% for the limit of liquidity; 18.71% ± 0.76% for the plastic limit; 13.06% ± 0.79% for the plasticity index; 83.00% ± 3.33% for passing of 2 mm sieve; 76.22% ± 3.2% for passing of 400 μm sieve; 89.07% ± 2.99% for passing of 4.75 mm sieve; 70.62% ± 2.39% passing of 80 μm sieve; 1.66 ± 0.61 for the consistency index; −0.67 ± 0.62 for the liquidity index and 8 ± 1 for the group index.","PeriodicalId":67978,"journal":{"name":"地质材料(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49631767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Use of Alternative Binder: Influence of Latex Content on Physical and Mechanical Properties of Laterite Stabilized with Raw Rubber Latex 替代粘结剂的使用：胶乳含量对用生胶乳稳定红土物理力学性能的影响

地质材料(英文) Pub Date : 2020-04-26 DOI: 10.4236/gm.2020.103004

K. C. Kouadio, Owochi Quentin Aristide Offo, C. H. Kouakou, E. Eméruwa

{"title":"Use of Alternative Binder: Influence of Latex Content on Physical and Mechanical Properties of Laterite Stabilized with Raw Rubber Latex","authors":"K. C. Kouadio, Owochi Quentin Aristide Offo, C. H. Kouakou, E. Eméruwa","doi":"10.4236/gm.2020.103004","DOIUrl":"https://doi.org/10.4236/gm.2020.103004","url":null,"abstract":"Raw rubber Latex contents, from 0% to 30% were used to stabilize lateritic samples to provide an alternative to cement stabilization. These samples were submitted to physical tests (water resistance test, absorption test) and mechanical tests (dry compressive strength test). The results indicate that samples made of latex content less than 15% dissolve completely into water. So it was impossible to make sample with these contents. Samples with 15% of raw rubber content or more are steady after water resistance test. The absorption rate of these samples decreases as the latex content increases. It goes from 14.45% for the samples at 15% to 5.87% for those at 30%. Therefore, the compressive strength test indicates that the resistance increases from 0.37 MPa for samples without latex to 3.15 MPa for those at 30% of latex content. Also, the rheological study shows that the samples pass from a brittle behaviour to a plastic behaviour when the latex content increases. The behaviour of the sample according to these different tests shows that this material can be used in several activity areas, such as construction, road building and sports area.","PeriodicalId":67978,"journal":{"name":"地质材料(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45218365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Contribution to Comparative Study of Physical-Chemical Characteristics of Diack Basalt and Bandia Limestone for Use in Railway Engineering 对铁路工程用玄武岩与班迪亚灰岩理化特性对比研究的贡献

地质材料(英文) Pub Date : 2020-04-21 DOI: 10.4236/gm.2020.102002

A. Diédhiou, L. Sow, A. Dione

引用次数: 3

Improve Geotechnical Design Parameter of Some Soft Clayey Soils 改进某些软粘土土的岩土设计参数

地质材料(英文) Pub Date : 2019-11-01 DOI: 10.4236/gm.2022.124005

N. Ali

{"title":"Improve Geotechnical Design Parameter of Some Soft Clayey Soils","authors":"N. Ali","doi":"10.4236/gm.2022.124005","DOIUrl":"https://doi.org/10.4236/gm.2022.124005","url":null,"abstract":"The shallow Soft Clayey deposit is common in Alexandria-Egypt. Most soft clays in their natural state are unsuitable for supporting any structure. Thus, improvement treatments exist to strengthen these soils so that improved soil can have adequate bearing capacity without undergoing failure or producing substantial excessive settlement post construction and applied loads to them. This paper presents a case study of an improved site in the city center, which reclaimed part of Maryout Lake, where the highly compressible clay with water content varies from 200% near the surface to 90% at the base of the shallow clay deposit. A prefabricated vertical drain with preloading has been used to improve this soft soil. Values of shear parameters and consolidation coefficient back-calculated from field measurements and have been compared with the values from lab and in situ tests. The study provides different relation-ships from comparisons of prediction and estimation compressibility and consolidation settlement from laboratory studies and particularly field case studies. Also, some correlation related to the compressibility with index properties of soft clay is presented. The results display that a substantial improvement is noticeable in the compressibility properties.","PeriodicalId":67978,"journal":{"name":"地质材料(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44758478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Aggregate Grain Size on the Formulation of Sand Concrete in the Construction Industry in Congo 刚果建筑业骨料粒度对砂混凝土配方的影响

地质材料(英文) Pub Date : 2019-10-31 DOI: 10.4236/gm.2019.94007

Charlène Bassolokidi Nkengue, N. Malanda, G. Ganga, P. Louzolo-Kimbémbé, G. Mouengue

引用次数: 1

Comparative Analysis of the Hard Hillsides Stability by Empirical Methods and Limit Equilibrium: Case of Ultra Basic and Andesites of Mako and Marbles of Bandafassi (Senegal) 用经验方法和极限平衡对硬山坡稳定性的比较分析——以Mako的超碱性和安山岩以及Bandafassi（塞内加尔）的大理石为例

地质材料(英文) Pub Date : 2019-07-31 DOI: 10.4236/GM.2019.93006

D. Sarr, Oustasse Abdoulaye Sall, M. Ndiaye, Nayini Joseph Serge Lompo

引用次数: 0

NaOH Activation of Raw Soils: Effect of NaOH Content on the Drying Kinetic and Its Modelling 生土的NaOH活化：NaOH含量对干燥动力学的影响及其模型

地质材料(英文) Pub Date : 2019-04-30 DOI: 10.4236/GM.2019.92005

Stevina Bouyila, R. Elenga, L. Ahouet, M. Ngoulou, Serge Konda

{"title":"NaOH Activation of Raw Soils: Effect of NaOH Content on the Drying Kinetic and Its Modelling","authors":"Stevina Bouyila, R. Elenga, L. Ahouet, M. Ngoulou, Serge Konda","doi":"10.4236/GM.2019.92005","DOIUrl":"https://doi.org/10.4236/GM.2019.92005","url":null,"abstract":"NaOH activation of soils is an affordable and promising way to improve mechanical properties of earthen bricks. If for well-activated geopolymers, the hard polymeric network limits the influence of water on mechanical properties, for the weakly activated one, as non-calcined raw clayey soils, the influence of water on these properties would be more critical. This work aims to determine the effect of sodium hydroxide concentration on the drying kinetics of bricks made with raw clayey soils, and to model this kinetics. The results show that the drying kinetics is governed by the diffusion of water due to the absence of free water. The drying duration increases linearly with the increasing of NaOH content, while the volumetric shrinkage decreases, probably thanks to the reduction of the material porosity during the formation of the zeolitic structures. Besides, the drying duration is strongly and negatively correlated with the initial drying rate (−0.97) and bricks did not show visible cracks. Among the five parametric models tested, the Khazaei’s model is the best in terms of all statistical criteria considered. For all models used, the coefficient of determination is ranged from 0.993 to 0.999, and the evolution of the models’ parameters is in accordance with that of the drying kinetics observed.","PeriodicalId":67978,"journal":{"name":"地质材料(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49526026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heterogeneous Photocatalytic Degradation of Dyes in Water/Alcohol Solution Used by the Brazilian Agate Industry 巴西玛瑙工业用水/醇溶液中染料的非均相光催化降解

地质材料(英文) Pub Date : 2019-01-21 DOI: 10.4236/GM.2019.91003

C. M. Mistura, I. Schneider, Y. Vieira

{"title":"Heterogeneous Photocatalytic Degradation of Dyes in Water/Alcohol Solution Used by the Brazilian Agate Industry","authors":"C. M. Mistura, I. Schneider, Y. Vieira","doi":"10.4236/GM.2019.91003","DOIUrl":"https://doi.org/10.4236/GM.2019.91003","url":null,"abstract":"The agate dyeing industry has been commonly seen as a high-pollution industry. Dyeing wastewater treatment is considered one of the most important categories for water-pollution control, because of its intense colour and the high concentration of organic contaminants. Most dyes used in the process present minimal biodegradability due to aromatic organic compounds in their structure. Using a photocatalytic reactor, experiments were carried out to study the decolorization of a water solution containing 8% ethylic alcohol and 200 mg L−1 of the dye Rhodamine B (RhB), the most difficult colorant to degrade among the used by the agate industry. The best conditions were further applied to treat the same agate water/ethyl alcohol solution containing a mixture of 200 mg L−1 of Rhodamine B (RhB), Crystal Violet (CV), Brilliant Green (BG), and Blood Red (BR). All the experiments were performed in a 2 L reactor equipped with ultraviolet (UV) lamps, at a wavelength of 365 nm, with powdered TiO2 or ZnO as the catalyst. The results indicated that the optimal decolorization conditions were attained with 2.5 g L−1 of the catalyst at pH 10 and an irradiation time of 80 min. The process resulted in complete degradation of CV, BG and 80% - 90% degradation of RhB and BR. The catalyst ZnO presented a performance somewhat better than TiO2. It is possible to conclude that the process of heterogeneous photocatalysis is effective for decolorization of water streams from the agate industry.","PeriodicalId":67978,"journal":{"name":"地质材料(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47642136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5