Shrinkage Performance of Cement-Treated Macadam Base Materials

Wang, Yan; Ma, Xiang; Sun, Zhilin

doi:10.1061/41123(383)132

Cited by 15 publications

(6 citation statements)

References 1 publication

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“…With the measured peak vertical load of the three-point bending beam specimen, the fracture toughness of CTCR can be calculated as follows 28 where, KIC is the fracture toughness, kN/m 3/ 2 ; PVmax, peak vertical load, kN; S , span length of the beam specimen, m; H , height of the beam specimen, m; B , width of the beam specimen, m; a , depth of the notched crack, m. f(a/H) is a function relevant to a/H, the expression of which is as follows …”

Section: Resultsmentioning

confidence: 99%

“…According to the application and the relevant outcomes of recent studies on CTCR, the lower cement dosages (less than 4%) cannot satisfy the requirements of the strength of base layer. 1,2 Therefore, the lower cement dosages (less than 4%) were not investigated in this study. The water to be mixed into the mixture was local tap water.…”

Section: Raw Materialsmentioning

confidence: 99%

“…Cement-treated crushed rock (CTCR) has been widely used as a kind of base layer material in pavement structure applications for a long period in China mainly because it has many advantages including higher strength and rigidity, and excellent wholeness and water stability. 1,2 There are some differences between concrete and CTCR. Above all, the cement content is different.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of fracture properties of cement-treated crushed rock

Zhang

Zhang³

2012

Proceedings of the Institution of Mechanical Engineers, Part L:

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A series of parametric tests have been conducted to investigate the fracture properties of cement-treated crushed rock with four specimen curing periods (14 d, 28 d, 60 d and 90 d) and four different cement contents (4%, 5%, 6% and 7%). By means of three-point bending method, the fracture toughness, fracture energy and the ultimate deflection in span center of the specimen of cement-treated crushed rock were measured respectively. The test results indicate that the curing period and cement content of the specimen have great influence on the fracture parameters of cement-treated crushed rock. With the increase of curing period, the resistance of cement-treated crushed rock to crack spreading is improved because the fracture toughness and the fracture energy are increasing gradually. With the increase of cement content, the fracture toughness, fracture energy and the ultimate deflection in span center of the specimen are decreasing gradually. It is better to select smaller cement content for the construction of cement-treated crushed rock base layer on condition that the compressive strength of the base layer can meet demand.

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Section: Resultsmentioning

confidence: 99%

Section: Raw Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of fracture properties of cement-treated crushed rock

Zhang

Zhang³

2012

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Cement-stabilized macadam (CSM) remains the primary material used for asphalt pavement subgrade in China due to its early strength, stability, and high integrity; it is widely used in the construction of high-grade highways in China. Extensive attention has been paid to CSM's performance regarding its compressive strength [1,2], flexural tensile strength [3,4], resilient modulus [5,6], durability, and shrinkage behavior [7,8], which are closely related to the structural design and performance evaluation of semi-rigid base asphalt pavements. As a particle-based composite material, CSM's performance is directly influenced by composition structure and dense homogeneity [9].…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis of Cement-Stabilized Macadam Compaction Processing Based on the Discrete Element Method

Liang

Zhang

Liu³

et al. 2022

Applied Sciences

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The mechanical properties of cement-stabilized macadam (CSM) base mixture are closely related to its forming process. Although the present study investigates the macroscopic effects of molding on cement-stabilized macadam, mesoscopic research analyses of the internal composition’s structural characteristics and change trends after molding lack sufficient intuitiveness. In this study, we built three-dimensional models of cement-stabilized macadam for heavy compaction molding and vibration molding tests based on the discrete element theory. The effects of different molding methods on cement-stabilized macadam’s internal structure were revealed from the mesoscopic perspective by tracking changes in porosity, coordination number, force chain development and internal particle position during the simulation molding process. The simulation results show that (1) the first 10 compactions had a significant influence on the molding effect, and specimens’ height and porosity decreased the fastest; (2) after the simulation experiments, the average coordination number of particles in the vibration molding specimen was 2.3% higher than that of the heavy compaction molding specimen; (3) after the simulation experiments, the vibration molding specimen’s porosity was 2.5% lower than that of the heavy compaction molding specimen; and (4) the vibration molding specimen’s particle distribution was more uniform, whereas the heavy compaction molding specimen’s particle distribution was dense at the top and sparse at the bottom. Overall, the effect of vibration molding is superior to that of heavy compaction molding.

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“…Cement-stabilized macadam, which exhibits high strength, excellent crack resistance, and strong erosion resistance, is the most commonly used semi-rigid base material (Berthelot et al 2010;Jitsangiam et al 2016). However, the major disadvantage of cement-stabilized macadam is that it is prone to cracking (Ma et al 2007a(Ma et al , 2007b(Ma et al , 2007cTaha et al 2002;Wang et al 2010). This crackig is mainly a result of material dehydration and temperature changes, which cause dry shrinkage and temperature shrinkage, respectively (Norling 1973;Wang et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Impact of Fiber Diameter on-Road Performance Of Cement-Stabilized Macadam

Liu

Wang

Wei

et al. 2017

The Baltic Journal of Road and Bridge Engineering

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Cement-stabilized macadam is the most widely used road base material in road engineering. The current study investigated the impact of fiber diameter on its performance. The authors prepared polyester fibers with diameters of 20, 35, 70, and 105 μm and added them to cement-stabilized macadam. Then, the indoor shrinkage tests and mechanical property tests at different ages were conducted. Then, the property changes of the polyester-reinforced cement-stabilized macadam were analysed. The water loss rate of the polyester-reinforced cement-stabilized macadam is subject to the combined influence of the "water loss surface effect" and "water loss porthole effect. " With increasing fiber diameter, the water loss surface effect becomes stronger, and the water loss porthole effect gradually decreases; thus, the overall effect transitions from the latter to the former. Moreover, the water loss rate shows an increasing trend of decreasing to its minimum. Therefore, with increasing fiber diameter, the average dry shrinkage coefficient of the polyester-reinforced cement-stabilized macadam first increases and then decreases, while the temperature shrinkage coefficients increase. The change in the fiber diameter does not significantly affect the compressive resilient modulus of the polyester-reinforced cement-stabilized macadam if the fiber content remains constant. These findings demonstrate the functional mechanism of the fiber diameter on the road performance of cement-stabilized macadam, thus improving our understanding of the road performance of the polyester-reinforced cement-stabilized macadam and laying a solid theoretical foundation for its many applications.

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Shrinkage Performance of Cement-Treated Macadam Base Materials

Cited by 15 publications

References 1 publication

Investigation of fracture properties of cement-treated crushed rock

Investigation of fracture properties of cement-treated crushed rock

Simulation Analysis of Cement-Stabilized Macadam Compaction Processing Based on the Discrete Element Method

Impact of Fiber Diameter on-Road Performance Of Cement-Stabilized Macadam

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