Different types of responses have been considered in the past as driving forces top-down cracking (TDC). The horizontal tensile strain at surface is most appropriate response pavement structures for analysing TDC. In computing strains, mechanistic design methods asphalt consider that layers are fully bonded and bottom-up critical type fatigue distress. bonding condition between one significant factors influencing performance. this research, effects interface conditions on investigated based...

Various types of responses have been selected in the past as driving forces top-down cracking. However, most appropriate candidate for cracking is horizontal tensile strain at pavement surface, considering bottom asphalt layer has historically used critical response bottom-up ME design. In this study, mechanisms are investigated based on surface. A multi-layered elastic computer code, APRA, was utilized to compute strains APRA uses Lucas algorithm and integration, summation extrapolation...

Semiflexible pavement (SFP) is gradually gaining more attention for its excellent rutting resistance and high load-bearing capacity. However, cracking damage one of the most challenging distresses in SFP due to brittle behavior cement paste (CP) insufficient adhesion between porous asphalt matrix (PAM) hardened CP. In this study, emulsion (CAEP) was introduced as a grouting material overcome shortcomings Therefore, effect CAEP on studied by conducting semicircular bending test obtaining...

Top-down cracking (TDC) as a severe type of has been widely reported in pavements with heavy traffic loads and mixtures sensitive to rutting damages. Since the likelihood TDC increases result weak mastic, semi-flexible (SFPs) grouted cement asphalt emulsion pastes (CAEPs) were introduced this study evaluate its performance prevalence or mitigation problem. Using laboratory tests, material properties resistance SFP CAEPs compared conventional mixture. Then comprehensive finite element (FE)...

Although the influence of load or strain level on binder fatigue has been comprehensively studied, modeling effects oxidative aging remains a challenging task. This study initially explores rejuvenation mechanism aged binders using physicochemical and rheological tests in different conditions. Then, life parameters LAS method for rejuvenated RAP are investigated concerning alterations complex modulus. Finally, model predicting Nf under varying conditions is developed, testing modulus data....

Top-down cracking (TDC) has been recognized worldwide and is regarded as a major type of asphalt pavement distress. In this study, fracture mechanisms behind the TDC propagation fatigue life pavements were investigated under dual tire loads using finite element (FE) analysis. By considering most influencing factors on propagation, stress intensity (SIF), including KI KII, calculated at critical transverse locations. According to Modes I II SIF, greater SIF indicates faster rate propagation....

This study is to evaluate the dynamic effects of falling weight deflectometer (FWD) loading on surface deflection asphalt pavement and accuracy statically backcalculated layer moduli from FWD data. The static deflections were computed using spectral element method elastic theory, respectively, for various structures. considerably larger than typical normalized difference between increases with increasing distance load center decreases duration. utilized backcalculate two backcalculation...

The horizontal tensile strain at the top of asphalt concrete (AC) layer is considered as most appropriate response pavement for analysing Top-down cracking (TDC). In this study, influence vehicle speed, temperature and non-uniform aging modulus on TDC are explored according to magnitudes surface. Utilizing a new analysis approach, responses computed bottom thick thin AC layers in pavements with cement-treated base (CTB) granular (GB). results demonstrate that critical arises transverse...

Due to time-temperature dependent behavior of asphalt concrete (AC), viscoelastic analysis is necessary for understanding the mechanism top-down cracking (TDC). In this study, a new approach determining surface responses multi-layered pavements was developed solve complicated oscillating and slow convergence integrand Laplace-transformed step-response function at pavement surface. By employing Lucas algorithm, irregular oscillations were reduced regular by separating into high- low-frequency...

Semi-flexible asphalt (SFA) composite pavement is widely used in engineering for its high load-bearing capacity, enhanced durability, impermeability, and resistance to fuel oil spillage. However, cracking remains a concern, influenced by repeated vehicle loads thermal contraction stresses. This study investigates the impact of cement emulsion paste as grouting material on SFA’s fatigue contraction. SFA specimens were grouted with (CP) containing 20%, 40%, 60% emulsion. These subjected...

As a sustainable substitute for non-renewable mineral resources and solid waste landfilling, municipal incineration residues (MSWIRs) are useful in road pavements. This study investigates the thermal characteristics temperature distribution of flexible pavements containing MSWIRs with hollow microsphere structures. First, volumetric properties asphalt mixtures MSWIR fillers were measured. The effects on mixture’s physical investigated terms conductivity, specific heat capacity, diffusivity....

Asphalt has been widely applied in traffic infrastructure construction. However, pavement structure was commonly confronted with the challenges of subgrade frost damage and thermal cracking asphalt, especially cold ground regions. This research investigated impact chemical microstructure on low-temperature characteristics modified asphalt composite seal. The Fourier transform infrared spectroscopy employed to determine component changes asphalts typical indices collected quantitatively....