Resilient modulus and influencing factors of vertical vibration compacted cement-stabilized macadam

Deng, Changqing; Jiang, Yingjun; Tian, Tian; Chen, Zhejiang

doi:10.1080/10298436.2019.1696462

Cited by 36 publications

(9 citation statements)

References 25 publications

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“…e mechanical strength of CSL compacted using VVCM higher than that using QSCM may be attributed that the loess is in a relatively flowing state under VVCM, which Moreover, the strength of the FCSs higher than laboratory-produced specimens may be explained by the influence of the mold size. Due to the influence of the mold size, the particles can rarely be fully moved and arranged in the process of compaction, thus affecting the internal structure [9,29,32,41]. However, the loess particles can be arranged sufficiently during the field vibration rolling, so as to improve the strength of the subgrade.…”

Section: Correlation Of Mechanical Properties Between Laboratory-mentioning

confidence: 99%

Comparison of Mechanical Properties of Cement‐Stabilized Loess Produced Using Different Compaction Methods

Jiang

Yuan

et al. 2020

Advances in Materials Science and Engineering

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Mechanical properties are important indexes to evaluate the improvement effect and engineering performance of cement-stabilized loess (CSL). This paper presents a comparison of the mechanical properties of CSL compacted using hammer quasi-static compaction method (QSCM) and vertical vibration compaction method (VVCM). The compaction properties, unconfined compressive strength (UCS), splitting strength (SPS), and resilient modulus (RM) of the laboratory-compacted CSL using VVCM and QSCM are tested and compared. Furthermore, the effects of compaction method, cement content, compaction coefficient, and curing time of the CSL specimens are investigated. In addition, field measurements are carried out to validate the laboratory investigations. The results show that the laboratory-compacted CSL using VVCM has a larger dry density and smaller optimum water content than that using QSCM. And the compaction method has a great influence on the mechanical strength of CSL. The UCS, SPS, and RM of the specimen produced using VVCM are averagely 1.17 times, 1.49 times, and 1.17 times that of CSL produced using QSCM, respectively, and the UCS, SPS, and RM of the specimens produced using these two methods increase linearly as the cement content and compaction coefficient increase, while the mechanical strength growth curve experiences three periods of increasing sharply, increasing slowly, and stabilizing with the curing time increased. Moreover, the results also show that the mechanical properties of laboratory-compacted CSL using VVCM have a better correlation of 83.8% with the field core samples.

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Section: Correlation Of Mechanical Properties Between Laboratory-mentioning

confidence: 99%

Comparison of Mechanical Properties of Cement‐Stabilized Loess Produced Using Different Compaction Methods

Jiang

Yuan

et al. 2020

Advances in Materials Science and Engineering

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“…In interpreting this result, we note that, when site construction was carried out, the road width was wider than the lab-formed specimens, allowing soil particles to be moved sufficiently. However, the lab specimen formation process was limited by the size of the test mold, so the mobility of the soil particles was diminished, affecting the internal structure [19,20,23,24]. The correlation of UCS values between specimens formed by the VVCM and corresponding on-site core samples was as high as 83.8%, while the same correlation between specimens formed by the SPCM and corresponding on-site core samples was less than 70%.…”

Section: Reliability Assessment Of Vertical Vibration Compaction Methodsmentioning

confidence: 99%

“…The VVTE parameters are the most important VVCM information ( Figure 1 ) [ 18 , 21 , 22 , 23 , 26 , 27 , 28 ]. Its working parameters include a vibration frequency of 35 Hz, nominal amplitude of 1.2 mm, vibration force of 7.6 kN, and upper- and lower-system weights of 120 and 180 kg, respectively.…”

Section: Experimental Designmentioning

confidence: 99%

“…The optimal moisture content determined by the HCTM is too large, and the maximum dry density too small; the correlation between the strength of specimens formed by SPCM and the actual core strength of the road surface is less than 70% [18]. To solve these problems, Jiang et al studied the effects of compaction method on the mechanical properties of inorganic binder-stabilized materials [18][19][20][21][22][23]. They verified the reliability of VVCM in the compaction of cement-stabilized materials in the laboratory by optimizing the working parameters of the vertical vibration test equipment (VVTE).…”

Section: Introductionmentioning

confidence: 99%

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Cement-Modified Loess Base for Intercity Railways: Mechanical Strength and Influencing Factors Based on the Vertical Vibration Compaction Method

Jiang

et al. 2020

Materials

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Cement-modified loess has been used in the recent construction of an intercity high-speed railway in Xi’an, China. This paper studies the mechanical strength of cement-modified loess (CML) compacted by the vertical vibration compaction method (VVCM). First, the reliability of VVCM in compacting CML is evaluated, and then the effects of cement content, compaction coefficient, and curing time on the mechanical strength of CML are analyzed, establishing a strength prediction model. The results show that the correlation of mechanical strength between the CML specimens prepared by VVCM in the laboratory and the core specimens collected on site is as high as 83.8%. The mechanical strength of CML initially show linear growth with increasing cement content and compaction coefficient. The initial growth in CML mechanical strength is followed by a later period, with mechanical strength growth slowing after 28 days. The mechanical strength growth properties of the CML can be accurately predicted via established strength growth equations. The results of this study can guide the design and construction of CML subgrade.

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“…Road workers in France, Switzerland and other countries have studied the effect of vibration molding by subjecting test specimens to lateral vibrations under a vertical load [16]. Thus far, VVTM has proven successful in designing road surface materials such as dense-graded asphalt mixtures and recycled emulsified asphalt mixtures [17][18][19][20][21], and road base materials such as cement stabilized macadam [22][23][24][25]. All of these materials achieve high road performance.…”

Section: Introductionmentioning

confidence: 99%

Performance of Stone Mastic Asphalt Mixtures Fabricated by Different Compaction Methods

et al. 2020

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In this study, stone mastic asphalt (SMA-13) mixtures were designed using three methods, namely the vertical-vibration testing method (VVTM), Marshall method, and superpave gyratory compactor method (SGC). The performances of SMA-13 designed by all three methods were measured and compared. Results show that the optimal asphalt content of the asphalt mixture was 5% lower in the VVTM-designed SMA-13 than in the Marshall-designed and SGC-designed asphalts mixture. In comparison with the Marshall- and SGC-designed asphalts mixture, the VVTM-designed SMA-13 exhibited higher density (2.4% and 2.2% increase, respectively), mechanical properties (32% and 13% increase, respectively), high-temperature rut resistance (30% and 8% increase, respectively), low-temperature crack resistance (20% and 17% increase, respectively), water stability (4% and 3% increase, respectively), and fatigue life (at least 33% and 9% increase, respectively). The VVTM-designed SMA-13 exhibited a deeper short-term aging degree than the other SMA-13 specimens, but a smaller long-term aging degree. In summary, the SMA-13 mixture designed by the VVTM method delivered a better road performance and durability than the traditional design method, enabling improved designs of SMA mixtures.

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Resilient modulus and influencing factors of vertical vibration compacted cement-stabilized macadam

Cited by 36 publications

References 25 publications

Comparison of Mechanical Properties of Cement‐Stabilized Loess Produced Using Different Compaction Methods

Comparison of Mechanical Properties of Cement‐Stabilized Loess Produced Using Different Compaction Methods

Cement-Modified Loess Base for Intercity Railways: Mechanical Strength and Influencing Factors Based on the Vertical Vibration Compaction Method

Performance of Stone Mastic Asphalt Mixtures Fabricated by Different Compaction Methods

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