This study quantitatively investigates the fatigue cracking behavior of ultra-large particle size asphalt mixture (LSAM-50) under coupled temperature and stress effects. Fatigue tests were conducted across temperatures ranging from −15 °C to 35 levels (0.3–0.9 splitting tensile strength), with crack evolution tracked in real time using digital image correlation (DIC). Key parameters, including main length, density, curvature, fractal dimension, strain, analyzed characterize propagation....

This study investigates the resilient modulus of vertical vibration compacted cement-stabilized macadam (CSM). The reliability compaction method (VVCM) for CSM was verified. Then influences four factors on were studied and a prediction equation proposed. Subsequently, aggregate type, cement dosage, gradation initial ultimate moduli studied. Results show that compared to quasi-static-compaction method, VVCM has smaller influence optimum water content gradation, specimens have higher...

In this study, the fatigue performance of cement-stabilized crushed gravel (CSCG) is examined. The mechanical strength CSCG specimens formed using vertical vibration compaction method (VVCM) or quasi-static (QSCM) compared with that field core samples (FCS). Cylindrical VVCM are used to study splitting performance, and a equation established Weibull distribution. factors influence namely gradation cement content, also analyzed. results show correlation between FCS as high 90%, whereas QSCM...

Damage to underground structures caused by liquefaction is one of the important types hazards in field geotechnical engineering. Utility tunnels are lifeline projects cities. To ensure sustainable and safe operation utility over a design life 100 years, this paper investigates seismic response pattern liquefied site. In paper, shaking table tests were carried out on tunnel layered liquefiable Based test data, distribution law acceleration pore pressure model deformation soil analyzed first....

The effects of fiber type and content on the properties emulsified asphalt cold recycled mixture (ECRM) produced using vertical vibration compaction are examined. reliability testing method (VVTM) is verified by comparing physical VVTM-prepared samples with those prepared via Marshall (MCM) mechanical core from a construction site. Furthermore, strength pavement performance ECRM different fibers tested. Finally, entropy-weight technique for order preference similarity to ideal solution...

The calculation method of asphalt film thickness was proposed by considering the specific surface area coarse and fine aggregates [computed tomography (CT) Blaine test methods] wrapping effect particles (<0.075 mm) on to investigate optimal dosage mixtures. pavement performance mixtures studied. determination for is based performance. study shows that 4.4 μm has best high-temperature higher thickness, better its low-temperature performance, water stability, fatigue selected according...

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 (SGC). The performances of SMA-13 by all methods measured compared. Results show that optimal content mixture was 5% lower in VVTM-designed than Marshall-designed SGC-designed asphalts mixture. comparison with Marshall- mixture, exhibited higher density (2.4% 2.2% increase, respectively), mechanical...

A heat-reflective coating can be used to solve various problems, including rutting and deformation caused by the excessively high asphalt pavement temperatures during summer. However, durability of coatings applied has not been extensively researched. The colour changes, crack development attenuation cooling performance are studied along with changes in skid resistance because wear. Subsequently, lifespan is predicted based on results. This study indicates that amount spraying positively...

The performance of a skid resistance fog seal is studied to develop high bond road seal. Accordingly, developed based on the strength, permeability, and aging resistance. To herein, particle types dosages are optimized according wear properties. then verified. Furthermore, studied, optimal amount proposed. Finally, influence construction process investigated. results show that self-made has better 0.6 kg/m2 exhibits best water penetration performance, while constructed by premix

In this paper, a novel crack detection method is proposed based on the digital image of building external wall. We strive to record wall surface condition accurately, and then get linear characteristics for recognition. This paper first does edge detection, binary adaptive threshold removal isolated points, obtaining effective characteristics. Finally we distinguish cracks normal lines through curve fitting its parameter analysis. The experimental results are satisfactory.

Herein, the effects of contents emulsified asphalt, waterborne epoxy resin emulsion, and curing agent on permeability, bond shear strength, water stability, aging resistance epoxy-emulsified asphalt were studied. A formulation as a fog-sealing adhesive material was recommended, comparison between fabricated traditional Chinese conducted to verify technical performance new material. In addition, strength formation mechanism revealed via microcosmic analysis. Results show that content mainly...

The vertical vibration compaction method (VVCM), heavy and static pressure were used to form phyllite specimens with different degrees of weathering. influence cement content, compactness, on the mechanical properties was studied. evaluated in terms unconfined compressive strength ( R c ) modulus resilience E ). Further, test roads paved along an expressway China demonstrate feasibility highly weathered improvement technology. Results show that unweathered can be as subgrade filler. In spite...