Showing 181 - 200 results of 241 for search '"limestone"', query time: 0.06s Refine Results
  1. 181

    Optimization of Low-Carbon Footprint Quaternary and Quinary (37% Fly Ash) Cementitious Nanocomposites with Polycarboxylate or Aqueous Nanosilica Particles by Styliani Papatzani, Kevin Paine

    Published 2019-01-01
    “…In this paper, nS particles dispersed in (a) polycarboxylate or (b) water were added to a low-carbon footprint reference binder containing 43% Portland cement (PC), 20% limestone powder (LS), and 37% fly ash (FA) by mass of binder. …”
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  2. 182

    Erodibility and sedimentation potential of marly formations at the watershed scale by F. Rostami, S. Feiznia, M. Aleali, M. Heshmati, B. Yousefi yegane

    Published 2019-07-01
    “…The results indicated that Kashkan formation comprises siltstone, sandstone, shale, and conglomerate, and Grupi formation contains shale, clay, and limestone with a high erodibility potential. Field measurements and soil samples analyzed for effective factors releaved that sediment yield for Merek watershed was 18080.6 m3/ha/y. …”
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  3. 183

    Research on Design Indicators for Graded Crushed Stone Mixture Based on Vibration Molding Method by Li-biao Chen, Er-hu Yan, Jian Xu, Tao Ma, Jun-cheng Zeng, Yan Gong

    Published 2020-01-01
    “…Therefore, based on the modified vibration compaction, the guidelines for standardized mix design of graded crushed stone mixture in Fujian province are proposed: the resilient modulus of 300 MPa and the deformation rate of 10–8 in the dynamic triaxial test are used as the performance indicators of the bearing capacity and the antideformation ability; the shear strength of 400 kPa in the static triaxial test is used as the performance indicators of the shear failure resistance. Besides, most limestone mixtures perform well and have the advantages of good resistance to permanent deformation and shear resistance.…”
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  4. 184
  5. 185

    PRELIMINARY FINDINGS AND AWARENESS FROM THE C6-1 ARCHAEOLOGICAL EXPLORATION IN KRONGNO, DAKNONG PROVINCE by Lê Xuân Hưng, La Thế Phúc, Phạm Thị Phương Thảo, Vũ Tiến Đức, Nguyễn Trung Minh

    Published 2018-12-01
    “…Vietnamese archaeologists have discovered and studied over 200 limestone caves with prehistoric dwellings dating from the early period of the Old Stone Age to the New Stone Age. …”
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  6. 186

    Experiment of Carbonate Dissolution: Implication for High Quality Carbonate Reservoir Formation in Deep and Ultradeep Basins by Zhiliang He, Qian Ding, Yujin Wo, Juntao Zhang, Ming Fan, Xiaojuan Yue

    Published 2017-01-01
    “…In the semiopen system, the weight loss from dolomitic limestone prevailed with 0.3% CO2 as the reaction fluid. …”
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  7. 187

    Prediction of end-point phosphorus content of molten steel in BOF with machine learning models by Kang Y., Ren M.-M., Zhao J.-X., Yang L.-B., Zhang Z.-K., Wang Z., Cao G.

    Published 2024-01-01
    “…The factors influencing the end-point phosphorus (P) content in BOF were ranked in order of importance as: Tapping temperature > Turning down times > Steel scrap quantity> Operation habits of different working groups > Amount of oxygen injection> Sulfur and phosphorus content of molten iron > Addition amount of lime, limestone, and lightly burnt dolomite in the slag > Slag-splashing amount.…”
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  8. 188

    Influence of the Chemical Composition of Asphalt and the 3D Morphology of the Aggregate on Contact Surface Adhesion by Luoke Li, Meng Guo, Cong Zeng

    Published 2021-01-01
    “…The type of adhesion between the aggregate and the asphalt includes chemical and physical adsorption; chemical bonding is relatively strong, and the physical orientation force and mechanical interlocking force are relatively weak. Alkaline limestone aggregates should be used with asphalt with a high aggregate content of colloid and asphaltenes. …”
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  9. 189

    The search for minerals and creation of first production and territorial complexes in Yamalo-Nenets National District (1932–1937) by A. E. Wolf

    Published 2018-06-01
    “…In 1935–1936, Yamalo-Nenets District Commitee applied to the Omsk regional Executive Committee for the allocation of funds for the district for the construction of mining industry — brick and limestone industry…”
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  10. 190

    Rome à la campagne : les décors en pierre de la villa de la Grande Boussue à Nouvelles (Mons, Belgique) by Catherine Coquelet, Roland Dreesen, Éric Goemaere, Éric Leblois, Marie-Thérèse Raepsaet-Charlier

    Published 2023-12-01
    “…Belgian stones are predominantly present: Devonian and Carboniferous grey-blue limestones, various Belgian marbles including the Gris des Ardennes and the Rance red marble, as well as clayey limestones of the Tournai stone type. …”
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  11. 191

    RESERVOIR CHARACTERIZATION OF THE CHELA FORMATION OF THE NSIAMFUMU AND LIAWENDA FIELDS IN THE ONSHORE COASTAL BASIN, D.R. CONGO by Kalunga Sina-Nduku Tryphene, Deko Oyema Bruno, Link Bukasa Muamba, Pierre Paty Tshibumbu Kayeya, Emmanuel Kazinguvu Atibu, Dominique Wetshondo Osomba

    Published 2024-07-01
    “…The following observations were obtained: • Wells Lw-1: the formation is characterized by dolomitic limestone and micaceous black shale with a thickness of 34 m having heavy oil indices and an average porosity of 17% and a salinity greater than 300 gr/L; • Well Lw-2: the formation is characterized by islands of sand, coarse sandstone and a few quartz pebbles with a thickness of 10m showing evidence of light oil, gas and an average porosity of 24%; • Shaft Lw-3: the formation is dominated by micaceous shale and dolomite interbeds with a thickness of 14m showing little evidence of hydrocarbons, only salt water and residual oils; • Puits Ns-1: the formation is characterized by beige to grey dolomite, grey shale and white sand with a thickness of 6m showing evidence of light oil and an average porosity of 20%. …”
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  12. 192

    Sierra Espuña (Librillos, 2023) by Miguel Ángel González Espinosa

    Published 2023-10-01
    “…It is part of the Betic reliefs that were formed in the Tertiary Era, and it is a mountain range composed of permeable limestone rock that produces springs such as the Balneario de Archena. …”
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  13. 193

    Vestiges humains des niveaux de l’Aurignacien ancien du site de Brassempouy (Landes) by Dominique Henry-Gambier, Bruno Maureille, Randall White

    Published 2004-06-01
    “…It includes several caves (grotte du Pape, grotte des Hyènes, galerie Dubalen, galerie du Mégacéros) which are part of a complex karstic system developed in an Eocene limestone formation just a few meters beneath the natural ground surface. …”
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  14. 194

    Sierra Espuña (Librillos, 2023) by Miguel Ángel González Espinosa

    Published 2023-10-01
    “…It is part of the Betic reliefs that were formed in the Tertiary Era, and it is a mountain range composed of permeable limestone rock that produces springs such as the Balneario de Archena. …”
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  15. 195

    Analysis of Sedimentary Environment Conditions for Lacustrine Fine-Grained Sedimentary Rocks and Its Control of Lithofacies Development: A Case Study of the Lower Submember of Memb... by Jun Peng, Ledan Yu, Tianyu Xu, Yubin Wang, Haodong Han

    Published 2021-01-01
    “…In this submember, the lithofacies primarily includes organic-rich mudstone, organic-rich lime mudstone, organic-rich lime-bearing mudstone, and organic-contained argillaceous limestone/lime mudstone. The sedimentary environment controls the mineral composition and content in the lithofacies and thus determines the lithofacies types. …”
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  16. 196

    Aménagements de berge monumentaux d’époque laténienne et romaine à Besançon (Doubs) by Christophe Gaston

    Published 2020-12-01
    “…BC) built with undressed limestone blocks of highly heterogeneous sizes. This development was followed by an imposing murus gallicus which is dated to about 80 BC and possibly corresponds to that quoted by Caesar. …”
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  17. 197

    Hydrogeochemical Characteristics of the Haiyuan-Liupanshan Seismic Belt at the Northeastern Edge of the Tibet Plateau by Xinyan Li, Xiaopeng Liu, Jianguo Du, Yueju Cui, Fengxia Sun

    Published 2022-01-01
    “…The higher concentrations of Ca2+ + Mg2+ and HCO3- were found in Group 2, which is located in the southeast of the HLFZ and may be attributed to carbonate weathering and the recharge of karst fissure water from ordovician dolomite and limestone. Contamination of groundwater in HLFZ is severe, with 78.6% of the sites classified as grade V, which means they cannot be used for drinking water or agriculture. …”
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  18. 198

    A Machine Learning Approach for the Autonomous Identification of Hardness in Extraterrestrial Rocks from Digital Images by Shuyun Liu, Haifeng Zhao, Zihao Yuan, Liping Xiao, Chengcheng Shen, Xue Wan, Xuhai Tang, Lu Zhang

    Published 2024-12-01
    “…A custom dataset of 1496 rock images, including granite, limestone, basalt, and sandstone, was created. Ten features, such as roundness, elongation, convexity, and Lab color values, were extracted for prediction. …”
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  19. 199

    Relationship between Brittleness Index and Crack Initiation Stress Ratio for Different Rock Types by Juyu Jiang, Dong Wang, Xinping Han, Shuai Di

    Published 2020-01-01
    “…According to results of the limestone tests, α = 3 for σc < 60 MPa (high porosity), α = 5 for 60 MPa ≤ σc ≤ 90 MPa (moderate porosity), and α = 8 for σc > 90 MPa (low porosity) as well as for igneous and metamorphic rocks. …”
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  20. 200

    La flore sauvage du boulevard Dr Henri-Henrot à Reims/Durocortorum : approche carpologique de l’environnement du site et des productions de denrées végétales by Véronique Matterne, Clémence Pagnoux

    Published 2022-11-01
    “…Several of them are strictly segetal flora, and accompany limestone soil improvements in harvesting practices. …”
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