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Journal articles on the topic 'Aggregate level'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sun, Xizao, Shiwei Liu, Hanya Tang, et al. "Effects of Water-Level Fluctuation on Soil Aggregates and Aggregate-Associated Organic Carbon in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China." Land 13, no. 3 (2024): 313. http://dx.doi.org/10.3390/land13030313.

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Water-level fluctuation (WLF) can destroy soil aggregates and induce soil organic carbon (SOC) loss, potentially triggering impacts on the concentration of atmospheric carbon dioxide. However, responses of soil aggregate content and aggregate-associated organic carbon to WLF have not been well studied, especially in the water-level fluctuation zone (WLFZ) of the Three Gorges Reservoir (TGR). Therefore, samples from different elevations (145 m, 155 m and 165 m) in the WLFZ of the TGR were collected for experiments. The wet sieving method was used to divide soil into silt and clay (<0.053 mm)

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2

Zhang, Yan Kun, Shu Shan Zhao, Tie Jun Qu, and Hai Ying Wu. "Numerical Analysis of Combined Aggregate Concrete from the Meso-Scale Level." Applied Mechanics and Materials 584-586 (July 2014): 1229–32. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1229.

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In the paper , the combined aggregate concrete is regarded as a three-phase composite material based on the meso-scale level, it consists of lightweight aggregate, ordinary aggregate and mortar. According to Fuller’s grading curve, the number of aggregate with different size could be obtained. And the randomly aggregates model is generated base on the Monte Carlo method. APDL program is developed to generate finite element model of combined aggregate concrete, On the basis, the stress characteristics of combined aggregate concrete is studied.

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3

Nutt, Perry J., Michael R. Reed, and Jerry R. Skees. "Farm Level Corn Acreage Response Estimation." Journal of Agricultural and Applied Economics 18, no. 2 (1986): 1–6. http://dx.doi.org/10.1017/s0081305200006051.

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AbstractThis study reports results of an acreage supply equation using individual farm data and develops implications for bias introduced by use of aggregate data. The analysis shows that use of aggregate acreage response models underestimates the absolute value of price elasticities and the lagged adjustment process. Further, aggregated analyses cannot incorporate some variables found to be important in explaining from level acreage response.

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4

Li, Luoke, Meng Guo, and Cong Zeng. "Influence of the Chemical Composition of Asphalt and the 3D Morphology of the Aggregate on Contact Surface Adhesion." Advances in Civil Engineering 2021 (January 2, 2021): 1–16. http://dx.doi.org/10.1155/2021/8870295.

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The influence of the chemical composition of asphalt, the aggregate lithology, and the morphological characteristics of the aggregate on the level of adhesion between the asphalt and the aggregate is investigated. A contactless three-dimensional (3D) white-light scanning technique is used to obtain point cloud data of the aggregate particles. Six independent feature parameters are used as evaluation indices to quantitatively describe the multilevel features of the 3D morphology of road aggregates. Methods for analyzing the feature parameters based on the point cloud data of the aggregate are p

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5

Jackson, Chris J., Stephen Z. Levine, and Adrian Furnham. "Gray's model of personality and aggregate level factor analysis." European Journal of Personality 17, no. 5 (2003): 397–411. http://dx.doi.org/10.1002/per.490.

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Previous research shows that correlations tend to increase in magnitude when individuals are aggregated across groups. This suggests that uncorrelated constellations of personality variables (such as the primary scales of Extraversion and Neuroticism) may display much higher correlations in aggregate factor analysis. We hypothesize and report that individual level factor analysis can be explained in terms of Giant Three (or Big Five) descriptions of personality, whereas aggregate level factor analysis can be explained in terms of Gray's physiological based model. Although alternative interpret

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Ren, Xiaoyan, Xinyi Zhang, Liqun Cai, and Jun Wu. "Responses of Soil Aggregate Stability and SOC to Different Tillage Modes and Straw Input Level." Sustainability 17, no. 3 (2025): 893. https://doi.org/10.3390/su17030893.

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Straw returning has an effective strategy for improving soil carbon sequestration and aggregate stability, as well as promoting sustainable agricultural development. Although in recent years, predecessors have conducted in-depth studies on the impact of tillage patterns and straw returning levels on soil organic carbon (SOC) and aggregate stability, we remain unclear on which tillage modes and straw return levels were the most suitable combinations in the study area. In view of this, we examined the influence of two tillage modes (tillage with straw returning, TS; no-tillage with straw mulchin

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7

Lv, Wenwen, Yulin Liu, Xuying Hai, et al. "Nitrogen Enrichment Regulates the Changes in Soil Aggregate-Associated Bacterial Community: Evidence from a Typical Temperate Forest." Forests 15, no. 1 (2023): 77. http://dx.doi.org/10.3390/f15010077.

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The nitrogen (N) enrichment induced by atmospheric N deposition affects both soil physicochemical properties and bacterial communities. However, how N enrichment affects soil aggregate-associated bacterial communities remains largely unclear. In this study, we conducted a two-year N addition experiment (four N levels: 0, 5, 10, and 20 g N m−2 year−1, corresponding to normal N, low N, medium N, and high N, respectively) in a Quercus liaotungensis Koidz–dominated forest. The distribution, nutrient content, and bacterial community composition of the soil aggregates were measured under various N e

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8

ZHOU, XIAO-QING, and YONG XIA. "MESOSCALE MODELING OF CONCRETE UNDER DYNAMIC SPLIT TENSION." Journal of Earthquake and Tsunami 07, no. 03 (2013): 1350028. http://dx.doi.org/10.1142/s1793431113500280.

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In this paper, a mesoscale model is adopted to simulate concrete behavior under dynamic split tension. The concrete material is assumed to comprise coarse aggregates, mortar matrix, and an interfacial transition zone (ITZ). In the mesh generation process, random coarse aggregate particles are generated from a certain aggregate size distribution and then placed into the mortar matrix with ITZ between the coarse aggregate edge and the mortar matrix. Different aggregate shapes, such as circular, oval, and polygons are modeled to analyze the gravel and crushed stone aggregates. Numerical simulatio

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9

Aoyama, M., D. A. Angers, and A. N'Dayegamiye. "Particulate and mineral-associated organic matter in water-stable aggregates as affected by mineral fertilizer and manure applications." Canadian Journal of Soil Science 79, no. 2 (1999): 295–302. http://dx.doi.org/10.4141/s98-049.

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Application of cattle manure generally improves soil structure and organic matter (OM) content. However, changes in forms and location of OM within the aggregate structure are less well known. The effects of long-term (18-yr) applications of cattle manure (20 Mg ha–1 yr−1) and NPK fertilizer on the distribution of particulate and mineral-associated organic matter in water-stable aggregates were investigated in a Le Bras loam (Humic Gleysol). Soil samples from the 0- to 10-cm depth were taken from the untreated control, NPK, manure and NPK + manure treatments. They were separated into four aggr

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10

Guo, Lixia, Yanan Zhang, Ling Zhong, Minghua Wang, and Xuanyi Zhu. "Study on Macroscopic and Mesoscopic Mechanical Behavior of CSG based on Inversion of Mesoscopic Material Parameters." Science and Engineering of Composite Materials 27, no. 1 (2020): 65–72. http://dx.doi.org/10.1515/secm-2020-0007.

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AbstractCement Sand and Gravel (CSG) is a low-cost, environment-friendly composite material mixed of unscreened aggregate, cement, fly ash and water, and its properties differ from ordinary concrete due to different aggregate characteristics. In order to investigate the effect of aggregate characteristics on the mechanical behavior of CSG, this paper used numerical simulation method to divide the CSG into aggregate unit, cement mortar unit and interface unit at the mesoscopic level and randomly generate aggregate, then used laboratory uniaxial compression test results to inverse the said mesos

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11

LEVENDUSKY, MATTHEW S., and JEREMY C. POPE. "Measuring Aggregate-Level Ideological Heterogeneity." Legislative Studies Quarterly 35, no. 2 (2010): 259–82. http://dx.doi.org/10.3162/036298010791170196.

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Hanel, Paul H. P., Sara M. G. da Silva, and Richard A. Inman. "Using Public Datasets to Understand the Psychological Correlates of Smoking, Alcohol Consumption, and Obesity: A Country-Level Analysis." Cross-Cultural Research 56, no. 2-3 (2021): 99–124. http://dx.doi.org/10.1177/10693971211062130.

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In the present research, we investigate whether cultural value orientations (CVOs) and aggregate personality traits (Big-5) predict actual levels of alcohol consumption, smoking, and obesity across 50 countries using averages derived from millions of data points. Aggregate traits explained variance above and beyond CVOs in obesity (particularly neuroticism and extraversion), while CVOs explained variance beyond aggregate traits in alcohol consumption (particularly harmony and hierarchy). Smoking was not linked to aggregated traits or CVOs. We conclude that an understanding of the cultural corr

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13

Liu, Jun, Yao Li, Xu Ming Wang, and Run Qing Liu. "Organic Pretreatment of Recycled Aggregates of Rural Construction Waste." Applied Mechanics and Materials 161 (March 2012): 1–5. http://dx.doi.org/10.4028/www.scientific.net/amm.161.1.

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Through using acetic acid resin, asphalt and urea resin organic pretreatment methods to pretreat the surface of rural construction waste, and testing of crush index and water absorption rate of recycled coarse aggregate after pretreatment, the research for the influence of organic pretreatment technology on physical and mechanical performance of recycled coarse aggregate. The results prove that organic infiltrating pretreatment technology can effectively enhance the density of the coarse aggregate and decrease the crush of recycled coarse aggregate index, in a certain extent. The crush index o

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14

Yadav, Yogesh, and Ishwor Singh Saud. "Performance Evaluation of Artificial Angular Fly Ash Aggregate." Journal of Advanced College of Engineering and Management 8, no. 1 (2023): 15–27. http://dx.doi.org/10.3126/jacem.v8i1.55908.

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This experimental study describes the development of the lightweight angular fly ash aggregate (FAA) and consequent comparison of properties of FAA with natural aggregate (gravel). The manufacturing process of these FAA involves blending of fly ash with cement and alkali activators at various proportioning of cement to fly ash and placing the mix in the mould. This is followed by curing of the cubes for 7 days after letting it to dry for 24hrs and crushing them to obtain the aggregate of different sizes. After having the fly ash aggregate, the test are carried out in fresh state and hardened s

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15

Jordán, A., J. García-Moreno, Á. J. Gordillo-Rivero, L. M. Zavala, and A. Cerdà. "Organic carbon, water repellency and soil stability to slaking under different crops and managements: a case study at aggregate and intra-aggregate scales." SOIL Discussions 1, no. 1 (2014): 295–325. http://dx.doi.org/10.5194/soild-1-295-2014.

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Abstract. This research studies the distribution of organic C and intensity of water repellency in soil aggregates with different size and in the interior of aggregates from Mediterranean soils under different crops (apricot, citrus and wheat) and management (conventional tilling and no tilling/mulching). For this, undisturbed aggregates were sampled and carefully divided in size fractions (0.25–0.5, 0.5–1, 1–2, 2–5, 5–10 and 10–15 mm) or peeled to obtain separated aggregate layers (exterior, transitional and interior). Organic C content in the fine earth fraction of soils under different crop

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16

Dubyagin, Alexander, Volodymyr Gurуеv, and Irina Firsova. "INTER-LEVEL BALANCE: INDICATORS OF THE OBJECT’S LEVEL STRUCTURE, ITS CHANGES AND COORDINATION – THE AGGREGATE FORM." Technical Sciences and Technologies, no. 2(16) (2019): 62–70. http://dx.doi.org/10.25140/2411-5363-2019-2(16)-62-70.

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Urgency of the research. Indicators of the object's level structure, its changes and coordination, as one of the specific categories of the inter-level balance's indicators, provide a comprehensive quantitative assessment of the managed object's structure, its structural shifts, losses and replenishment based on the attribute measured in its units in the ratio scale. Target setting. The corresponding inter-level balance indicators, presented previously through the unweighted (nonaggregated) components of the latter, do not represent a possible assessment. Actual scientific researches and issue

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17

Kong, Yu Tian, Juan Wang, Zong Kun Li, and Li Hong Zhang. "A Simple Method of Coarse Aggregate Generation Based on PFC2d." Applied Mechanics and Materials 438-439 (October 2013): 149–52. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.149.

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To establish an appropriate random aggregate model at meso-level is the basis for successfully simulating the meso-mechanical behaviors of concrete. This paper proposes a new simple method to generate random aggregates of concrete by PFC2d. And the distribution of aggregate in the two-dimensional concrete specimen cross-section is determined by Walraven formula. The results show that the numerical aggregate distribution matches well with the theoretical grading curve.

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18

Navaz, Aaliya, and Anju Paul. "A review on characteristics of pervious concrete using recycled aggregate." Sustainability, Agri, Food and Environmental Research 10, no. 1 (2021): 1–8. http://dx.doi.org/10.7770/safer-v10n1-art2451.

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Pervious concrete is a mixture of cement, coarse aggregate mixed with water. The absence of fine aggregate helps increase the voids and water can pass through these gaps and reaches to ground level. The use of recycled coarse aggregates from construction and demolition is a sustainable solution with many environmental benefits and also reduces the number of virgin aggregates to be created, hence reducing the extraction of natural resources. This paper reviews the research developments of pervious concrete by replacing natural aggregates with different percentages of recycled coarse aggregate.

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19

Feng, Xin, Zhaoyun Sun, Zhenzhen Xing, Yulong Wu, and Chenyi Lian. "Coarse Aggregate Shape Classification Method Based on Per-Optuna-LightGBM Model." Journal of Physics: Conference Series 2589, no. 1 (2023): 012015. http://dx.doi.org/10.1088/1742-6596/2589/1/012015.

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Abstract To improve the detection level of aggregate shape for automated road use, Per-Optuna-LightGBM model for aggregate shape classification is proposed. Collect aggregate images using industrial camera and extract 48 morphological feature parameters. A feature importance analysis method based on Spearman Correlation and Permutation Importance is proposed to remove redundant factors and select the feature parameters of aggregate morphology. Based on cross-validation, an optimized Optuna-LightGBM model is trained based on the constructed dataset. Compared with GS-XGBoost algorithm, the Optun

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20

NISHIBATA, SAYAKA, TAKESHI WATANABE, CHIKANORI HASHIMORO, and KIYOSHI KOHNO. "EVALUATION OF FRACTURE IN CONCRETE WITH RECYCLED AGGREGATE BY ACOUSTIC EMISSION." International Journal of Modern Physics B 20, no. 25n27 (2006): 3652–57. http://dx.doi.org/10.1142/s0217979206040143.

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This research revealed fracture behavior of concrete in using recycled aggregates by Acoustic Emission as one of the Non-destructive Inspection. The phenomenon of acoustic emission (AE) is the propagation of elastic waves generated from a source, known as a micro-crack in an elastic material. There were taken to use low-treated recycled aggregate, crushed returned ready mixed concrete for aggregate and normal aggregate. Examination measured AE under the uniaxial compression test. The condition of load is repeated loading. As a result, fracture behavior due to low treated recycled aggregate was

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21

Wan, Chao Jun, Xu Chen, Teng Li, Tai Zhong Huang, and Tian Ming Deng. "Effect of Variability of Recycled Aggregate on Properties of Concrete." Applied Mechanics and Materials 174-177 (May 2012): 1122–32. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1122.

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Low, medium and high variability of aggregates of concrete were designed and prepared and the influence of variability of recycled aggregates on the mechanical properties and durability of concretes was investigated. The experimental results indicated that the kinds of strengths, static compressive elastic modulus and durability of recycled concrete were decreased at engineering-acceptable level compared with natural aggregate concrete; the most properties of recycled concrete with high variability of recycled aggregates are not very different from that of recycled concrete with medium variabi

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22

Dubyagin, Alexander. "INTER-LEVEL SUBSTITUTION – THE CANONICAL FORM OF THE INTER-LEVEL BALANCE." Technical Sciences and Technologies, no. 1(11) (2018): 9–17. http://dx.doi.org/10.25140/2411-5363-2018-1(1)-9-17.

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Urgency of the research. Inter-level substitution is the basis for the formation in the aggregate form of a model and sys-tem of indices of the inter-level balance, and the latter comprehensively assess the consequences of the control effect on the structured object and the effectiveness of the impact itself. Target setting. Existing evaluation methods do not take into account the factor of movement of object units from one level of the characteristic to another, which is why the structural analysis of the results of the impact is incomplete.Actual scientific researches and issues analysis. In

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23

Collins, Ronald, Donald Watson, Andrew Johnson, and Yiping (Peter) Wu. "Effect of Aggregate Degradation on Specimens Compacted by Superpave Gyratory Compactor." Transportation Research Record: Journal of the Transportation Research Board 1590, no. 1 (1997): 1–9. http://dx.doi.org/10.3141/1590-01.

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Aggregate degradation during gyratory compaction may cause changes in the original gradation of the aggregate, and it may also affect volumetric requirements for Superpave Level I mix design. The effect of aggregate degradation on the design gradation and final volumetric properties of the asphalt mix compacted by the Superpave gyratory and Astec vibratory compactors was evaluated. Because vibratory compaction is an alternative compaction method that simulates field compaction, a vibratory compactor developed by Astec Industries, Inc., was used for comparison with the Superpave gyratory compac

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Vasić, Milan, Aleksandar Savić, Sanja Martinović, Milica Vlahović, and Tatjana Volkov-Husović. "Properties of green self-compacting concrete designed by particle packing density method." Holistic approach to environment 13, no. 2 (2023): 40–47. http://dx.doi.org/10.33765/thate.13.2.1.

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Since depletion of natural resources and the amount of construction and demolition waste have overcome the socially and environmentally acceptable level, the construction industry must address this issue and reduce its impact on the environment. A step towards sustainability in the construction industry is the application of recycled aggregates and supplementary cementitious materials as integral components of concretes, which provides conserving natural aggregates and waste reduction. This study adopts a holistic approach to producing green self-compacting concrete with the highest portion of

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Tian, Ying Liang, Wen Cai Liu, Su Ping Cui, et al. "Recycled CRT Funnel Glass as Coarse Aggregate and Fine Aggregate in the Radiation Protection Concrete." Materials Science Forum 847 (March 2016): 437–44. http://dx.doi.org/10.4028/www.scientific.net/msf.847.437.

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In recent decades, high-tech electrical equipment has drastically proliferated instead of Cathode Ray Tube (CRT), making CRT funnel glass potential hazardous solid waste. Due to a relatively high level of lead, CRT funnel glass could be used as a potential material for the production of anti-radioactive concrete. In our study the CRT funnel glass , which was separated as aggregate in the concrete, was reduced to 4.75-25 mm (coarse aggregates) and less 4.75 mm (fine aggregates) in the production of anti-radioactive concrete. Mixes containing 0%, 20%, 40% , 60%, 80% and 100% (volume percentage)

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26

Hu, Li Qun, and Ai Min Sha. "Research on Performance of Cement Stabilized Skeleton-Dense Structure Aggregate Base Course Material." Advanced Materials Research 194-196 (February 2011): 1089–94. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1089.

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Laboratory tests were conducted to evaluate the performance of cement stabilized “skeleton-dense structure” aggregate and conventional “suspended-dense structure” aggregate. In this study, both of the aggregates above were stabilized by cement with different cement content (2%, 3%, 4%, 5% and 6%). Performances of the prepared specimens were studied in terms of compaction property, 7 day unconfined compressive strength (UCS), thermal shrinkage coefficient and 30 min erosion quantity. Results indicated that the maximum dry density of cement stabilized “skeleton-dense structure” aggregate is bigg

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27

Yang, Mu-Jeung. "Micro-Level Misallocation and Selection." American Economic Journal: Macroeconomics 13, no. 4 (2021): 341–68. http://dx.doi.org/10.1257/mac.20160253.

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How large are the aggregate productivity losses from the misallocation of resources across firms? With endogenous selection, microfrictions can induce extensive margin misallocation among firms: too many unproductive firms are active (Zombies), and too many productive firms are inactive (Shadows). Therefore, the same set of measured distortions potentially induces much larger aggregate productivity losses, as the composition of firms is shifted toward unproductive active firms. I develop and calibrate a model with plant-level microdata for Indonesia to quantify aggregate welfare in the presenc

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Rahma Nindya Ayu Hapsari, Bambang Haryadi, Agung Sutarto, Monica Ayu Istianti, Joan Rafif Panduwijaya, and Aulia Putri Lanjarsari. "HIGH QUALITY ECONOMICAL CONCRETE WITH VARYING COMPOSITIONS OF RECYCLED AGGREGATE AS A SUBSTITUTION OF COARSE AGGREGATE." Journal Innovation of Civil Engineering (JICE) 4, no. 2 (2023): 129–39. http://dx.doi.org/10.33474/jice.v4i2.20413.

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The high level of infrastructure development at present forces old buildings to undergo repairs or even demolition to make way for new buildings that are more suitable and representative. The resulting demolition waste is usually discarded, becoming solid waste. The solution to the above problem is recycling the concrete waste as an alternative aggregate to replace some or all of the natural aggregates in the concrete mixture. Concrete with recycled aggregates is made with several composition variations of replacement to natural coarse aggregates, which is 0%, 25%, 35%, 45%, and 50%. The concr

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29

Liu, Lijun, Guanglin Gou, Jinxia Liu, et al. "Effects of Dodonaea viscosa Afforestation on Soil Nutrients and Aggregate Stability in Karst Graben Basin." Land 11, no. 8 (2022): 1140. http://dx.doi.org/10.3390/land11081140.

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Dodonaea viscosa is widely cultivated in the karst graben basin and is crucial for recovering land after rocky desertification. However, the effect of long–time D. viscosa afforestation on changes in the quality of soil remains unclear. Soil nutrients and aggregate composition can be used to evaluate the beneficial effects of afforestation of D. viscosa in improving soil functional stability. In this study, soil nutrients and aggregate stability were investigated using cropland, 10–year, 20–year, and 40–year D. viscosa afforestation and secondary succession shrub. Compared to the cropland, D.

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Kumutha, R., and K. Vijai. "Effect of Recycled Coarse Aggregates in Properties of Concrete." Journal of Green Building 3, no. 4 (2008): 130–37. http://dx.doi.org/10.3992/jgb.3.4.130.

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The properties of concrete containing coarse recycled aggregates were investigated. Laboratory trials were conducted to investigate the possibility of using recycled aggregates from the demolition wastes available locally as the replacement of natural coarse aggregates in concrete. A series of tests were carried out to determine the density, compressive strength, split tensile strength, flexural strength and modulus of elasticity of concrete with and without recycled aggregates. The water cement ratio was kept constant for all the mixes. The coarse aggregate in concrete was replaced with 0%, 2

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Lee, Yong Taeg, Seong Uk Hong, Hyun Suk Jang, Sang Ki Baek, and Young Sang Cho. "Compressive Strength Estimation of Recycled Coarse Aggregate Concrete Using Ultrasonic Pulse Velocity." Applied Mechanics and Materials 147 (December 2011): 288–92. http://dx.doi.org/10.4028/www.scientific.net/amm.147.288.

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National effort to recycle construction waste as structural concrete usage of high economic value is ongoing, but performance rate of recycling is a low-level due to a lack of awareness on the recycled aggregates. Accordingly, the goal of this study was to verify the structural applicability of recycled aggregates. This study compared a compressive strength based on the replacement ratio of natural aggregate and recycled aggregate, and analyzed a correlation of wave velocity due to the increase in compressive strength under the same condition. The 『design standard strength – replacement ratio

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Filotenkovas, Vilius, and Audrius Vaitkus. "Influence of the Aggregate Shape and Resistance to Fragmentation on Unbound Base Layer Resilient Modulus." Baltic Journal of Road and Bridge Engineering 17, no. 3 (2022): 104–19. http://dx.doi.org/10.7250/bjrbe.2022-17.571.

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The performance of unbound base materials, exclusively of the upper base layers, besides compaction level and layer thickness, depends on unbound material type, aggregates shape, fine content and mechanical properties of aggregates. The response of the pavement structure to loading is expressed through stress and strain magnitudes, accumulation of which leads to layer permanent deformations. One of the key factors for designing unbound base layers is resilient modulus, which can be found from triaxial tests. The aim of the research is to analyse the effect of the aggregate particle shape, stru

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33

Casares, Miguel. "On firm-level, industry-level, and aggregate employment fluctuations." Journal of Economic Dynamics and Control 37, no. 12 (2013): 2963–78. http://dx.doi.org/10.1016/j.jedc.2013.08.009.

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Ali, Muhammad Chaeder, Abdul Rahim Nurdin, and Ahmad Yauri Yunus. "Analisis Kelayakan Limbah Keramik Sebagai Pengganti Agregat Halus Untuk Campuran Aspal Beton." Jurnal Penelitian Teknik Sipil Konsolidasi 2, no. 3 (2024): 211–16. https://doi.org/10.56326/jptsk.v2i3.3402.

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Asphalt concrete is an even mixture of aggregate and asphalt as a binder. Before mixing, the two ingredients must be heated to dry the aggregate and get a sufficient liquid level of asphalt to make the mixture easy. Ceramic waste can be used as an alternative aggregate in asphalt concrete mixtures. They must be ground until they meet the standard fine aggregate grain diameter. The objective of this research is to evaluate that the fine aggregate samples studied are crushed ceramic waste; to evaluate ceramics used as fine aggregates in hot asphalt mixes that meet asphalt concrete quality standa

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Shi, Dong Sheng, Zheng Ma, An Li Wu, and Jing Bo Wang. "Study on Drying Shrinkage Properties of Concrete Using Blast Furnace Slag as Fine Aggregate." Applied Mechanics and Materials 174-177 (May 2012): 539–44. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.539.

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In this paper, the experiment about drying shrinkage of concrete using blast furnace slag as fine aggregate was introduced. In this experiment, blast furnace slag fine aggregates that were produced by two different steel factory and natural river sands that came from two different producing area were been used, and compressive strength of concrete for testing were four levels from ordinary strength level to high strength level. As results, the drying shrinkage of concrete that used blast furnace slag as fine aggregate is less than concrete that used natural river sand as fine aggregate when th

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36

Nsabimana, Gratien, Yuhai Bao, Xiubin He, et al. "Impacts of Water Level Fluctuations on Soil Aggregate Stability in the Three Gorges Reservoir, China." Sustainability 12, no. 21 (2020): 9107. http://dx.doi.org/10.3390/su12219107.

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Aggregate is the basic unit of soil structure, which is crucial to the sustainability of soil system functions such as structural stability and Fertility Maintenance. Three Gorges Dam (TGD) has extensively led to a dramatic hydrological regime alteration, which may consequently affect various soil physical properties. The aim of this study was to investigate the long-run temporal variation of soil aggregate stability as induced by water-level fluctuations in the riparian zone of the Three Gorges Reservoir (TGR). Sampling plots were established along different elevations considering the interva

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Ataria, Robert B., and Yong C. Wang. "Mechanical Properties and Durability Performance of Recycled Aggregate Concrete Containing Crumb Rubber." Materials 15, no. 5 (2022): 1776. http://dx.doi.org/10.3390/ma15051776.

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Despite extensive research studies, recycled aggregates and worn-out tyres of motor vehicles are still not fully reused and are hence disposed of in ways that are damaging to the environment. Several studies have been carried out on recycled aggregate and rubberized concrete, but very limited studies are conducted on rubber recycled aggregate concrete. This study focuses on the workability, mechanical properties and durability performance of concrete made with 100% recycled aggregates and crumb rubber at different replacement level (5%, 10%, 15% and 20%). The first stage of the study covers th

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Li, Guodong, Zhengyi Ren, Zhiyuan Wang, Jiangjiang Yu, and Zhimeng Zhao. "Mixed Mode I-II Fracture Path and Initiation Angle of Concrete at Mesoscale Level." Advances in Materials Science and Engineering 2019 (May 6, 2019): 1–10. http://dx.doi.org/10.1155/2019/4236521.

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This paper presents the mesolevel numerical simulation and experimental verification of mixed mode I-II fracture for the four-point shearing beam with a single-side notch based on the concrete damaged plasticity (CDP) method and the Monte Carlo simulation (MCS) random aggregate method. And it discusses the influence of volume rate and maximum size of the coarse aggregate on the fracture path and the initiation angle of concrete mixed mode I-II fracture. The results show that the coarse aggregate has a significant influence on the distribution width, average length, and the dispersion degree of

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Shan, Ying, Zhengfu Yue, Guangfan Zhou, et al. "Organic Management Mediates Multifunctionality Responses to Land Conversion from Longan (Dimocarpus longan) to Tea Plantations at the Aggregate Level." Agronomy 14, no. 10 (2024): 2224. http://dx.doi.org/10.3390/agronomy14102224.

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Soil aggregates, which are highly influenced by land conversion, play key roles in driving soil nutrient distribution and microbial colonization. However, the role of soil aggregates in shaping the responses of microbial community composition and multiple ecosystem functions, especially ecosystem multifunctionality (EMF), to land conversion remains poorly understood. In this study, we investigated the impact of the conversion of a longan orchard (LO) to a conventional tea plantation (CTP) and organic tea plantation (OTP) on soil EMF at the aggregate level and explored the underlying mechanism.

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Schlotter, D., and H. Schack-Kirchner. "Intra-aggregate CO<sub>2</sub> enrichment: a modelling approach for aerobic soils." Biogeosciences Discussions 9, no. 10 (2012): 14795–822. http://dx.doi.org/10.5194/bgd-9-14795-2012.

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Abstract. CO2 concentration gradients inside soil aggregates, caused by the respiration of soil microorganisms and fungal hyphae, might lead to variations in the soil solution chemistry on a mm-scale, and to an underestimation of the CO2 storage. But, up to now, there seems to be no feasible method for measuring CO2 inside natural aggregates with sufficient spatial resolution. We combined a one-dimensional model for gas diffusion in the inter-aggregate pore-space with a cylinder diffusion model, simulating the consumption/production and diffusion of O2 and CO2 inside soil aggregates with air-

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Schlotter, D., and H. Schack-Kirchner. "Intra-aggregate CO<sub>2</sub> enrichment: a modelling approach for aerobic soils." Biogeosciences 10, no. 2 (2013): 1209–18. http://dx.doi.org/10.5194/bg-10-1209-2013.

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Abstract. CO2 concentration gradients inside soil aggregates, caused by the respiration of soil microorganisms and fungal hyphae, might lead to variations in the soil solution chemistry on a mm-scale, and to an underestimation of the CO2 storage. But, up to now, there seems to be no feasible method for measuring CO2 inside natural aggregates with sufficient spatial resolution. We combined a one-dimensional model for gas diffusion in the inter-aggregate pore space with a cylinder diffusion model, simulating the consumption/production and diffusion of O2 and CO2 inside soil aggregates with air-

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Li, Yong, Qi Lin, Zhenxin Zhang, Liqiang Zhang, Dong Chen, and Feng Shuang. "MFNet: Multi-Level Feature Extraction and Fusion Network for Large-Scale Point Cloud Classification." Remote Sensing 14, no. 22 (2022): 5707. http://dx.doi.org/10.3390/rs14225707.

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The accuracy with which a neural network interprets a point cloud depends on the quality of the features expressed by the network. Addressing this issue, we propose a multi-level feature extraction layer (MFEL) which collects local contextual feature and global information by modeling point clouds at different levels. The MFEL is mainly composed of three independent modules, including the aggregated GAPLayer, the spatial position perceptron, and the RBFLayer, which learn point cloud features from three different scales. The aggregated GAPLayer aggregates the geometry features of neighboring po

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Maisonneuve, Etienne, Benjamin Ezraty, and Sam Dukan. "Protein Aggregates: an Aging Factor Involved in Cell Death." Journal of Bacteriology 190, no. 18 (2008): 6070–75. http://dx.doi.org/10.1128/jb.00736-08.

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ABSTRACT In a previous study, we demonstrated the presence of protein aggregates in an exponentially grown Escherichia coli culture. In light of these observations, protein aggregates could be considered damage to cells that is able to pass from one generation to the next. Based on the assumption that the amount of aggregate protein could represent an aging factor, we monitored this amount in a bacterial culture during senescence. In doing so, we observed (i) a significant increase in the amount of aggregate protein over time, (ii) a proportional relationship between the amount of aggregate pr

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Li, Pengda, Lili Sui, Feng Xing, Xiaoxu Huang, Yingwu Zhou, and Yanchun Yun. "Effects of Aggregate Types on the Stress-Strain Behavior of Fiber Reinforced Polymer (FRP)-Confined Lightweight Concrete." Sensors 18, no. 10 (2018): 3525. http://dx.doi.org/10.3390/s18103525.

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The realization of reducing concrete self-weight is mainly to replace ordinary aggregates with lightweight aggregates; such replacement usually comes with some intrinsic disadvantages in concrete, such as high brittleness and lower mechanical properties. However, these shortages can be effectively remedied by external confinement such as fiber reinforced polymer (FRP) jacketing. To accurately predict the stress-strain behavior of lightweight concrete with lateral confinement, it is necessary to properly understand the coupling effects that are caused by diverse aggregates types and confinement

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Herd, Charles R., Gerard C. McDonald, Randolph E. Smith, and William M. Hess. "The Use of Skeletonization for the Shape Classification of Carbon-Black Aggregates." Rubber Chemistry and Technology 66, no. 4 (1993): 491–509. http://dx.doi.org/10.5254/1.3538323.

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Abstract A specialized image analysis erosion technique, termed skeletonization, has been used for the first quantitative and direct measurement of branching in carbon-black aggregates. Twenty different carbon-black grades were analyzed using transmission-electron-microscopy/automated-image analysis (TEM/AIA). The skeletonization data were used in a discrimination analysis program for detailed shape classification of carbon-black aggregates into four different shape categories that included spheroidal (Type 1), ellipsoidal (Type 2), linear (Type 3) and branched (Type 4). These data were used t

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Pollet, Thomas V., Andrea H. Stoevenbelt, and Toon Kuppens. "The potential pitfalls of studying adult sex ratios at aggregate levels in humans." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1729 (2017): 20160317. http://dx.doi.org/10.1098/rstb.2016.0317.

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Human adult sex ratios have been studied extensively across the biological and social sciences. While several studies have examined adult sex ratio effects in a multilevel perspective, many studies have focused on effects at an aggregated level only. In this paper, we review some key issues relating to such analyses. We address not only nation-level analyses, but also aggregation at lower levels, to investigate whether these issues extend to lower levels of aggregation. We illustrate these issues with novel databases covering a broad range of variables. Specifically, we discuss distributional

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Bordes, Christian, Michael Driscoll, and Marc-Olivier Strauss-kahn. "Price Inertia and Nominal Aggregate Demand in Major European Countries." Recherches économiques de Louvain 55, no. 2 (1989): 103–28. http://dx.doi.org/10.1017/s0770451800029584.

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SummaryIn this paper we report new evidence on the importance of price level inertia in the four major European countries: Germany, Prance, Italy and the United Kingdom. We focus on the sensitivity of the results to different proxies for aggregate demand and different measures of equilibrium (or trend output). Overall, our results confirm the findings of related studies, and show that price level inertia is present to a significant degree in Europe. In addition, monetary aggregates appear to be a poor proxy for aggregate demand because of systematic movements in velocity.

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Sipil, Junaidi. "Korelasi CBR Kondisi Soaked Dan Unsoaked Agregat Lapisan Pondasi Bawah (LPB) Pada Timbunan Jalan (Studi Kasus: Agregat LPB Jalan di Pulau Bengkalis)." Jurnal TeKLA 4, no. 2 (2023): 83. http://dx.doi.org/10.35314/tekla.v4i2.3001.

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By origin, the surface soil on Bengkalis Island is a type of sedimentary soil in which the subgrade has a relatively low carrying capacity and also has a low surface elevation and is prone to water inundation (flooding). In order to increase the bearing capacity and increase the elevation of the road surface, the road construction is filled with aggregate in the sub-base layer (LPB) of the road. All road LPB aggregates used on Bengkalis Island are imported from outside and spread over several quarries. Before the road LPB aggregate is used as a road construction fill material, the LPB aggregat

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Li, Bei Xing, Da Ke, Ji Hong Song, and Ke Jian Fu. "Effect of Gypsum-Contaminated Aggregate on Long Term Properties of Mortar." Advanced Materials Research 450-451 (January 2012): 205–9. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.205.

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Contamination of aggregates with gypsum occurs frequently. Fine aggregate has more detrimental effect due to its large surface area. An experimental work had carried out to investigate the behavior of mortar made from six SO3 contents in the fine aggregate, five size fractions of gypseous aggregate and three C¬3A contents in the cement. The results show that significant expansions do not occur within mortar bars if the content of SO3 lies below 1.25% by the weight of fine aggregate and the reduction in strength is higher in later ages and for higher SO3 contents. The size fraction of gypseous

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Benson, Todd. "Agricultural correlates of aggregate nutritional outcomes in Malawi: District-level rank analysis." Outlook on Agriculture 46, no. 4 (2017): 279–88. http://dx.doi.org/10.1177/0030727017744940.

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Obtaining empirical evidence on the importance of agriculture in determining nutritional status is difficult, as there are few data sets that contain information on both nutrition outcomes and the agricultural livelihoods of survey respondents. Here we take advantage of the fact that the Demographic and Health Survey fielded in Malawi in 2010, which collected detailed information on nutrition outcomes, used comparable survey strata to a household consumption and expenditure survey in 2010–2011 that collected extensive information on agricultural production. While the samples for the two survey

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