scholarly journals Estimation of the compaction characteristics of soils using the static compaction method

2019 ◽  
pp. 1-10
Author(s):  
Kamil KAYABALI ◽  
Ramin ASADİ ◽  
Mustafa FENER ◽  
Orhan DİKMEN ◽  
Farhad HABİBZADEHa ◽  
...  
Keyword(s):  
Compaction Characteristics ◽  
Compaction Method ◽  
Static Compaction

Experimental Study on the Compaction Characteristics of Chloride-Based Weak Saline Soil

2012 ◽  
Vol 512-515 ◽  
pp. 3024-3032 ◽  
Author(s):  
Jun Yong Liu ◽  
Liu Jun Zhang ◽  
Biao Ding
Keyword(s):  
Experimental Study ◽  
Saline Soil ◽  
Technical Problems ◽  
Compaction Characteristics ◽  
Fine Grained ◽  
Optimum Water Content ◽  
Vibration Compaction ◽  
Compaction Method ◽  
Optimum Water ◽  
Standard Density

In order to solve the technical problems of fine-grained weak saline soil subgrade compaction, combing with Qarham to Golmud highway project, this paper studied the compaction characteristics of the weak saline soil by experiment, determined the optimal vibration-compaction parameters, and compared with the compaction effect that relevant criterions proposed. The results show that vibration-compaction can make the soil fully compacted and compaction effect is better. Suggestion: it is best to adopt the vibration-compaction method to determine standard density and optimum water content.

scholarly journals Compaction Characteristics of Cold Recycled Mixtures with Asphalt Emulsion and Their Influencing Factors

2021 ◽  
Vol 8 ◽  
Author(s):  
Decai Wang ◽  
Hui Yao ◽  
Jinchao Yue ◽  
Shengneng Hu ◽  
Junfu Liu ◽  
...  
Keyword(s):  
Permanent Deformation ◽  
Energy Index ◽  
Characteristic Parameters ◽  
Asphalt Emulsion ◽  
Compaction Characteristics ◽  
Superpave Gyratory Compactor ◽  
Compaction Energy ◽  
The Difference ◽  
Emulsified Asphalt ◽  
Compaction Method

The objective of this study is to investigate the compaction characteristics of cold recycled mixtures with asphalt emulsion (CRME) using the Superpave gyratory compactor (SGC) method. Five characteristic parameters were proposed and calculated including the compaction energy index, the compaction energy index, three compaction energy indicators at different compaction stages. The influence of these parameters and material compositions were analyzed for the pavement performance. The difference between SGC and Marshall double-sided compaction/heavy compaction method was compared. The results show that the proposed parameters can better reflect the compaction characteristics of CRME, and the mixture effect with SGC of 50 gyrations was close to that with 75 blows using the Marshall compaction. The asphalt emulsion contents and compaction temperatures had a significant effect on compaction characteristics, but the effect of aggregate gradations was not significant. The appropriate asphalt emulsion and the new aggregate content can increase the capability of the CRME to resist the permanent deformation. The optimum mixing water content of CRME obtained by the SGC method was reduced by 18%, but the density increased by 3.5%, compared with the heavy compaction method. Finally, a new idea to determine the optimum emulsified asphalt content of CRME was provided through analyzing the compaction characteristic parameters.

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.

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