scholarly journals In-situ Compaction Characteristics and Applicability Estimation of Compaction Method in Rock Fill

2014 ◽  
Vol 56 (2) ◽  
pp. 25-35 ◽  
Author(s):  
Seong-Yoon Lim
Keyword(s):  
Compaction Characteristics ◽  
Rock Fill ◽  
Compaction Method

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

Assessment of Ground Improvement by Vibro-compaction Method for Liquefiable Deposits from In-Situ Testing Data

2018 ◽  
Vol 17 (6) ◽  
pp. 723-735 ◽  
Author(s):  
Wei Duan ◽  
Guojun Cai ◽  
Songyu Liu ◽  
Jun Yuan ◽  
Anand J. Puppala
Keyword(s):  
Ground Improvement ◽  
In Situ Testing ◽  
Testing Data ◽  
Compaction Method

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 APPLICATION OF AN ELASTOPLASTIC MODEL TO PREDICT BEHAVIORS OF CONCRETE-FACED ROCK-FILL DAM UNDER COMPLEX LOADING CONDITIONS

2015 ◽  
Vol 21 (7) ◽  
pp. 854-865 ◽  
Author(s):  
Kuangmin Wei ◽  
Sheng Zhu
Keyword(s):  
Cyclic Loading ◽  
Kinematic Hardening ◽  
Complex Loading ◽  
In Situ Measurements ◽  
Coarse Grained ◽  
Loading Conditions ◽  
Elastoplastic Model ◽  
Hardening Model ◽  
Rock Fill

In this research, a simplified rotational kinematic hardening model with the concept of sub-loading was used to predict behaviors of Concrete-Faced Rock-fill Dam under complex loading conditions. The model can overcome the shortcomings of classic elastoplastic model (i.e. soil behaviors under cyclic loading-unloading can be predicted). Elastoplastic formula of the model was presented in detail. Then this model was verified with test results of coarse grained soils, under both monotonic loading and cyclic loading-unloading conditions. This model was also applied to analyze deformation of Shuibuya rock-fill dam, computed results and in-situ measurements are compared. Results showed that computed results were consistent with in-situ measurements in both construction and operation period. Results also showed that permanent deformation that was caused by fluctuations of the reservoir level can also be predicted by this rotational kinematic hardening model.

Development and Evaluation of Dynamic Flexural Beam Fatigue Test System

1996 ◽  
Vol 1545 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Akhtarhusein A. Tayebali ◽  
John A. Deacon ◽  
Carl L. Monismith
Keyword(s):  
Fatigue Life ◽  
Fatigue Test ◽  
Test Procedure ◽  
Laboratory Strain ◽  
Test System ◽  
Fabrication Procedure ◽  
Flexural Beam ◽  
Rolling Wheel ◽  
Compaction Method

Although both mix variables and environmental variables are known to affect the fatigue response of asphalt-aggregate mixes, other factors—including specimen fabrication procedure and test equipment and procedures—are equally important. The development of a dynamic flexural beam fatigue test system is described, and the effects of specimen compaction method and equipment type on the precision of in situ fatigue lives of asphalt-aggregate mixes predicted by using laboratory strain-life relationships are discussed. Results indicate a coefficient of variation of 41 percent in fatigue life for the new fatigue equipment compared with one of 93 percent for an earlier electropneumatic version. The specimen compaction method was also found to influence significantly the precision of the predicted fatigue life. A 33 percent difference in coefficients of variation between the fatigue response of rolling wheel–compacted specimens and kneading-compacted specimens was observed. Consequently, twice as many specimens are required to achieve a given level of precision in in situ predicted fatigue life if kneading compaction is used instead of rolling wheel compaction. Similarly, if a pneumatic system and associated test procedure are used, approximately 12 times as many specimens are required to achieve similar precision in predicted fatigue life compared with the new servohydraulic fatigue test system.

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.

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