Index of Compaction Characteristics

2009 ◽  
pp. 119-119-9
Author(s):  
JL McRae
Keyword(s):  
Compaction Characteristics

scholarly journals Modeling the Compaction Characteristics of Fine-Grained Soils Blended with Tire-Derived Aggregates

2021 ◽  
Vol 13 (14) ◽  
pp. 7737
Author(s):  
Amin Soltani ◽  
Mahdieh Azimi ◽  
Brendan C. O’Kelly
Keyword(s):  
Energy Levels ◽  
Model Development ◽  
Dry Mass ◽  
Unit Weight ◽  
Power Functions ◽  
Compaction Characteristics ◽  
Practical Applications ◽  
Fine Grained ◽  
Practical Procedure ◽  
Fine Grained Soil

This study aims at modeling the compaction characteristics of fine-grained soils blended with sand-sized (0.075–4.75 mm) recycled tire-derived aggregates (TDAs). Model development and calibration were performed using a large and diverse database of 100 soil–TDA compaction tests (with the TDA-to-soil dry mass ratio ≤ 30%) assembled from the literature. Following a comprehensive statistical analysis, it is demonstrated that the optimum moisture content (OMC) and maximum dry unit weight (MDUW) for soil–TDA blends (across different soil types, TDA particle sizes and compaction energy levels) can be expressed as universal power functions of the OMC and MDUW of the unamended soil, along with the soil to soil–TDA specific gravity ratio. Employing the Bland–Altman analysis, the 95% upper and lower (water content) agreement limits between the predicted and measured OMC values were, respectively, obtained as +1.09% and −1.23%, both of which can be considered negligible for practical applications. For the MDUW predictions, these limits were calculated as +0.67 and −0.71 kN/m3, which (like the OMC) can be deemed acceptable for prediction purposes. Having established the OMC and MDUW of the unamended fine-grained soil, the empirical models proposed in this study offer a practical procedure towards predicting the compaction characteristics of the soil–TDA blends without the hurdles of performing separate laboratory compaction tests, and thus can be employed in practice for preliminary design assessments and/or soil–TDA optimization studies.

scholarly journals Laboratory Investigation of Compaction Characteristics of Plant Recycled Hot-Mix Asphalt Mixture

2021 ◽  
Vol 13 (6) ◽  
pp. 3005
Author(s):  
Jiangang Yang ◽  
Chen Sun ◽  
Wenjie Tao ◽  
Jie Gao ◽  
Bocheng Huang ◽  
...  
Keyword(s):  
Regression Model ◽  
Hot Mix Asphalt ◽  
Orthogonal Experiment ◽  
Asphalt Mixture ◽  
Material Design ◽  
Void Content ◽  
Range Analysis ◽  
Aggregate Gradation ◽  
Compaction Characteristics ◽  
Compaction Energy

In this study, the compaction characteristics of recycled hot-mix asphalt (RHMA) were evaluated using the void content (VV), compaction energy index (CEI), slope of accumulated compaction energy (K), and lock point (LP). Then, the effects of the compaction parameters, including the gradation of the RHMA, reclaimed asphalt pavement (RAP) content, temperature of gyrations, and number of gyrations, on the compaction characteristics of RHMA were investigated. An orthogonal experiment was designed and the data collected were analyzed via range analysis; then, a regression model was generated relying on a quadratic polynomial. Furthermore, the regression model was used for the comparison and prediction of the mixture’s compactability during the material design. Finally, the compaction mechanism of RHMA was discussed from the perspective of the void content of RAP particles. The results showed that a finer aggregate gradation, a higher gyration temperature, a greater number of gyrations, and a higher RAP content were effective for increasing the compactability of RHMA. The range analysis results suggest that the gradation of RHMA has the greatest influence on compactability, followed by the RAP content. The RAP aggregate cannot diffuse to a new mixture completely, so the remained RAP particle reduces the void content of RHMA. Therefore, a higher RAP content up to 50% can help RHMA to achieve the designed void content with higher efficiency.

scholarly journals Study on Compaction Characteristics and Construction Control Index of Gravel Materials in a Core Wall Dam

2021 ◽  
Vol 669 (1) ◽  
pp. 012012
Author(s):  
Long Wang ◽  
Xiaogang Wang ◽  
Jianming Zhao ◽  
Renlong Huang ◽  
Zhengquan Yang ◽  
...  
Keyword(s):  
Construction Control ◽  
Compaction Characteristics

Compaction Characteristics of Pond Ash

2007 ◽  
Vol 19 (4) ◽  
pp. 349-357 ◽  
Author(s):  
Ashis Kumar Bera ◽  
Ambarish Ghosh ◽  
Amalendu Ghosh
Keyword(s):  
Pond Ash ◽  
Compaction Characteristics

scholarly journals Energy transfer and influencing factors in soil during compaction

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242622
Author(s):  
Jie Li ◽  
Xiaohong Bai ◽  
Fuli Ma
Keyword(s):  
Energy Transfer ◽  
Test System ◽  
Building Structures ◽  
Bottom Pressure ◽  
Large Area ◽  
Compaction Characteristics ◽  
Consumption Ratio ◽  
Fill Soil ◽  
Compaction Curve ◽  
The Stability

In China, large-area excavation and filling engineering has increased rapidly with the expansion of construction land. The quality of filling engineering is the most important guarantee for the stability of building structures. Among all research on fill soil, the compaction characteristics are significant for indicating the strength and stability of filling engineering. In this paper, two layers of loess fill soil were compacted by a self-manufactured test system with three different compaction energies. Based on the variation in the soil bottom pressure obtained in the tests, the influence of the compaction parameters on the soil bottom pressure was investigated. The results show that the compaction curve can be used instead of the curve of the change in soil bottom pressure with water content; as the soil density increases, the soil bottom pressure increases to the maximum. The relation of the energy consumption ratio of the soil bottom (σ/σz) and the number of soil layers is exponential and reveals the stability of the soil skeleton formed during compaction. This paper describes the compaction characteristics of loess fill soil from the perspective of energy transfer, and the conclusions provide a theoretical basis for soil filling engineering.

scholarly journals COMPACTION CHARACTERISTICS OF THE POWDER FROM THE SEED COAT OF TINGUI (Magonia pubescens)

2007 ◽  
Vol 29 (68/69) ◽  
Author(s):  
Antonio Zenon Antunes Teixeira
Keyword(s):  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Seed Coat ◽  
Brittle Material ◽  
Hydroxypropyl Methylcellulose ◽  
Mechanical Parameters ◽  
Compaction Characteristics ◽  
Strength And Deformation

The aim of this work was to examine the compaction characteristics of the powder from the seed coat of Tingui (Magonia Pubescens) comparing to the materials commonly used in pellet industries. The materials evaluated as comparison included Microcrystalline cellulose (MCC), Silicified microcrystalline cellulose (SMCC), Hydroxypropyl methylcellulose (HPMC), Polyvinil pirrolidone (PVP) and lactose. The mechanical parameters observed were hardness, tensile strength and deformation. The results confirmed that the powder from the seed coat of Tingui were quietly close to lactose as a soft brittle material.

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