Related Experiment Video
Updated: Jan 24, 2026
08:59
Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ
Published on: December 16, 2019
8.7K
Performance of cement-stabilized macadam roads based on aggregate gradation interpolation tests
Zhi Jun Liu1, Xiao Bi Wei1, Dong Quan Wang1
1State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China.
Mathematical Biosciences and Engineering : MBE
|May 30, 2019
Summary
This study investigated cement-stabilized macadam (CSM) aggregate gradations, finding that optimum water content increases linearly with finer gradations. Peak dry density occurred near Type B, while optimal strength and modulus were near Type D.
Area of Science:
- Civil Engineering
- Materials Science
- Geotechnical Engineering
Background:
- Cement-stabilized macadam (CSM) is a crucial pavement material.
- Aggregate gradation significantly influences CSM properties.
- Optimizing CSM gradation is key for performance and durability.
Purpose of the Study:
- To analyze the impact of five distinct aggregate gradations (A-E) on CSM properties.
- To determine the relationship between gradation, water content, dry density, and mechanical performance.
- To identify optimal gradations for compressive strength and rebound modulus.
Main Methods:
- Utilized uniform interpolation to define five CSM aggregate gradation types.
- Investigated variations in optimum water content and maximum dry density across gradations.
- Evaluated the skeleton void, fine aggregate filling, and cementation effects.
- Assessed resistance to temperature shrinkage deformation.
- Determined optimum compressive strength and compression rebound modulus.
Main Results:
- Optimum water content showed a linear increase with finer gradations.
- Maximum dry density followed a quadratic curve, peaking near Type B gradation.
- Skeleton void, filling, and cementation effects fluctuated with gradation.
- Temperature shrinkage deformation resistance decreased.
- Optimal compressive strength and compression rebound modulus were observed near Type D gradation.
Conclusions:
- Aggregate gradation critically affects CSM's physical and mechanical properties.
- Type B gradation yields the highest dry density, while Type D offers optimal strength and modulus.
- CSM performance, including deformation resistance, is sensitive to aggregate gradation choices.
Related Concept Videos
01:24Design Example: Aggregate Gradation
323
The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
323
01:21Aggregate Cement Ratio
562
The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
562
01:10Reconstruction of Signal using Interpolation
707
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
707
01:24Hydration of Cement
875
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
875
01:17Soundness of Cement
548
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
548
01:17Design Example: Alignment of a Road Line Using GIS
340
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
340