flexible pavement distress

Types of Failures in Flexible Pavements -Causes and Repair ...

Author: Neenu Arjun

Flexible Pavement Distress - FIT

Topic 2 –Flexible Pavement Distress The result of excessive consolidation of the pavement along the wheel path due to either reduction of the air voids in the asphalt layer, or the permanent deformation of the

Pavement Distresses - Pavement Interactive

HMA pavement damage that is visible at the surface of the pavement is often called “surface distress”. Provide some insight into why particular surface distresses are problematic. Provide some basic guidance into what kinds of conditions might lead to certain surface distresses. Suggest some basic repair strategies.

Tech Topic Flexible Pavement Distresses

Flexible pavements can suffer from several categories and subcategories of distresses that will lead to progressive deterioration of ride condition, structural strength, and motorist/pedestrian safety. The more common distresses found in the Delaware area are introduced herein.

Understanding asphalt pavement distresses – five ...

Cracking. Several different types of cracks can develop in asphalt pavements. The repair depends …

Types of Distresses in Concrete Pavements and their Causes

Types of Distresses in Concrete Pavements and their Causes. Following are the different types of distresses in pavements and their causes: a) Cracking of Concrete Pavements. Cracks in pavements often result from stresses caused by expansion and contraction or warping of the pavement.

Failure Modes in Pavements - kth.se

Failure Modes in Pavements Flexible Pavement Distress Modes Sigurdur Erlingsson sigurdur.erlingsson@vti.se KTH AF2903 Road Construction and Maintenance 19 March 2013 What is a failure of a pavement? • Failure of typical civil engineering structures is defined as break or fracture. This usually happens when applied load


spalling, and other pavement distresses being monitored by the LTPP program. The manual is divided into three sections, each focusing on a particular type of pavement: (1) asphalt -surfaced, (2) jointed portland cement , and (3) continuously reinforced portland cement . Each distress is clearly

Appendix A Pavement Distress Types and Causes

shoulders. Many of the photos used in this Appendix are from the LTPPDistress Identification Manual.1 Asphalt Pavement Distresses Fatigue (Alligator) Cracking Fatigue (also called alligator) cracking, which is caused by fatigue damage, is the principal structural distress which occurs in asphalt pavements with granular and weakly stabilized bases.

Best Practices Handbook on Asphalt Pavement …

'The most common flexible pavement distresses are cracking, roughness, weathering, raveling, rutting and bleeding. If the distresses identified in a pavement are related to structural deficiencies, the pavement section is most likely not a candidate for preventive maintenance treatment, and should be scheduled for rehabilitation or reconstruction.

APPENDIX B DISTRESSES - Transportation Research Board

This section contains the general descriptions of the major types of distress that may be encountered in flexible pavements. A typical description of three severity levels associated with each distress is provided. Fatigue Cracking . This distress occurs in areas subjected to repeated traffic loadings, usually in the wheel path. It

Pavement Distress Summary - Asphalt InstituteAsphalt Institute

Pavement Distress Summary - Asphalt Institute | Serving the needs of liquid asphalt manufacturers and suppliers worldwide since 1919. Serving the needs of liquid asphalt manufacturers and suppliers worldwide since 1919.


Alligator or Map Cracking (Fatigue Cracking) This is a common type of failure of flexible …

Rigid pavement distress - SlideShare

Jun 04, 2016 · 18. Conclusion Rigid Pavement Distress is a serious issue all over the world, The distresses causes some serious problems at wide range. Prevention of rigid pavement distress is a challenge to the Engineers. Maintenance and Rehabilitation is to be properly done to prevent the distresses in rigid pavement.

Pavement Manual: Types of Flexible Pavements

2.1 Definition of Flexible Pavement. A true flexible pavement yields “elastically” to traffic loading. It is constructed with a bituminous surface treatment or a relatively thin surface of hot-mix asphalt (HMA) over one or more unbound base courses resting on a subgrade.

Distress in flexible pavement - SlideShare

Apr 08, 2018 · PRESENTED BY – DEVRAJ REGAR (1724013) M.TECH 2nd SEM Transportation Engineering Study of Distress in flexible pavement 2. Introduction:_ Pavement Rigid Pavement_ The design of Rigid pavement is based on providing a structural cement slab of sufficient strength to resists the loads from traffic.

List of Distresses

Toggle navigation ACRP 09-11. Home; List of Distresses; Appendix Clear



SP-024 Manual for Condition Rating of Flexible …

interrelated measures, ride quality and distress manifestations, as the basis of its pavement condition rating scheme. Pavement condition rating is an essential component of the Ministry’s pavement management system. This manual provides the what, why, and how of pavement condition rating for flexible pavements.

(PDF) Flexible Pavement Evaluation: A Case Study

The field evaluation works were achieved on the existing flexible pavement conditions of the selected rural highway. The results were most of the damages and failures in the pavement are serious...

Pavement Distress and Evaluation

Pavement Distress and Evaluation Mike Mamlouk Arizona State University . Distresses in Asphalt Pavement . Basic Distress Mechanisms Load-related ... •Flexible - outer wheel path •Concrete - midslab, joint, corner Testing Locations / Frequency . Testing at Joints . Interpretation of NDT Data

Flexible Pavement Definition and Explanation - Highway ...

Flexible pavement is composed of a bituminous material surface course and underlying base and subbase courses. The bituminous material is more often asphalt whose viscous nature allows significant plastic deformation. Most asphalt surfaces are built on a gravel base, although some 'full depth' asphalt surfaces are built directly on the subgrade.

Distress Identification Manual for The LTPP (Fourth ...


(PDF) Pavement Distress: A Case Study

a flexible pavement that is aging and exhibiting distress. This selection process can be relatively straightforward if the cause of the pavement distress i s known.

Section 2: Routine Pavement Maintenance - Search

Flexible Pavement Distress Maintenance . Types of flexible pavement distress are listed below with guidelines for maintenance. Anchor: #EKOFBOAR; Alligator cracking is a type of distress that is generally caused by inadequate base support or brittle asphalt surface. Since cracks allow surface water to enter the subgrade and further destroy the stability of the subgrade, sealing should be accomplished as …


Flexible Pavement Distress Prediction Model for the City of Riyadh, Saudi Arabia Emirates Journal for Engineering Research, Vol. 9, No.1, 2004 83 Table 1. Distribution of common distress types on the network for the three surveys 4. MODEL FORMULATION Pavement distress behavior is expected to …

Pavement Management - Tennessee

Distress data includes metrics that define the deterioration of pavements such as cracking, rutting, or other pavement distresses. Distress data is compiled into a Pavement Distress Index (PDI), which can be further combined with the PSI for an overall pavement quality index (PQI).

Guide to the Investigation and Remediation of Distress in ...

Guide to the Investigation and Remediation of Distress in Flexible Pavements Presentation for: 2004 Annual Meeting of the Transportation Research Board


A- FLEXIBLE PAVEMENT DISTRESS . This section is a summary of the major flexible pavement distresses. Each distress discussion includes (1) pictures if available, (2) a description of the distress, (3) why the distress is a problem and (4) typical causes of the distress.


Key Words: Flexible pavement, repeated distress, recurrence, maintenance, rectification, rehabilitation, etc. 1. INTRODUCTION For the improvement of urban road transportation in the cities, there is a need to develop a set of procedures that will provide a systematic evaluation of highway needs, based on

Pavement Distress and Evaluation

Pavement Distress and Evaluation Mike Mamlouk Arizona State University . Distresses in Asphalt Pavement . Basic Distress Mechanisms Load-related ... •Flexible - outer wheel path •Concrete - midslab, joint, corner Testing Locations / Frequency . Testing at Joints . Interpretation of NDT Data

(PDF) Flexible Pavement Distresses Flexible Pavement ...

Pavement uplift (shearing) may occur along the sides of the rut. rut Ruts are particularly evident after a rain when they are filled with water. There are two basic types of rutting: mix rutting and subgrade rutting.

Study of Flexible Pavement Distresses on a Section of GT ...

Observed for distresses. Old Flexible Pavement. stretches. The distresses marked are seen at numerous locations and in all severity levels. Stretches fresh over-laid after cold recy- cling. The distresses marked are giving minor appearance.

Guide to the Investigation and Remediation of …

Pavement Distress Types Typical distress types for both HMA pavements and surface treatments •HMA ♦Cracking, Deformation, Deterioration, Mat problems •Surface Treatments ♦Seal Coats, Slurry Seals/Microsurfacing Distresses are consistent with Caltrans Condition Survey Procedure

Measuring Pavement Distresses

What is patch distress? Patch distress occurs when a patch repair is completed in one or more areas in an existing asphalt parking lot. While attempting to bring the pavement back to like-new conditions, the patch work may experience a combination of the other 8 distresses.

Survey and Evaluation of flexible Pavement Failures

high shoulders or pavement depressions ponding water on pavement, porous or open surface, or clogged side ditches. Plate 2: Severe potholes on pavement surface, [6] Kumar and Gupta [2] listed in Table 1 below the possible causes of different forms of pavement distresses. Table 1: The most common pavement distresses and their

Highway Pavements: Design, Types, Flexible and Rigid ...

‘Reliability’ means the ‘probability’ that any particular damage or distress of the pavement will remain within the permissible level during its design life. This automatically incorporates a certain amount of ‘certainty’ that the pavement will give satisfactory service during the entire design period.

Types of Pavements - Flexible Pavement vs Rigid Pavement

Flexible pavement: Definition. Flexible pavements are those pavements which reflect the deformation of subgrade and the subsequent layers to the surface. Flexible, usually asphalt, is laid with no reinforcement or with a specialized fabric reinforcement that permits limited flow or repositioning of the roadbed under ground changes.

Pavement Management Visual Distress Survey Manual

DISTRESS DEFINITIONS FLEXIBLE PAVEMENT DISTRESSES Transverse Cracking: Appears as cracks perpendicular to pavement centerline. Fatigue Cracking: Appears initially as a single longitudinal crack in the wheel path. Later appears as a series of interconnected cracks resembling alligator skin or …

6.1 Introduction 6. Pavement Design - University of …

6. Pavement Design zIntroduction zTraffic Load Analysis zPaving Materials ... Distress Types 6.1.2 Pavement Distress, Design Factors, Serviceability Factors Causing Distresses ... The flexible pavement section requires a design structure number of 4.0.

WORK Distresses: ACRP 09-11

AC Distress Decision Points Disintegration. Disintegration in a flexible pavement is typically caused by climate, insufficient compaction of the surface, insufficient asphalt binder in the mix, loss of adhesion between the asphalt coating and aggregate particles, or severe overheating of the mix. The following types of disintegration commonly occur.


PAVEMENT CONDITION ASSESSMENT 3.1 GENERAL In this chapter, pavement condition Rating (PCR) is introduced as an indicator that rates the surface condition of the pavement. Different types of distress and severity are illustrated in this chapter, the method used for calculating PCR value is presented. Finally, the PCR Scale

What is Flexible Pavement? (with pictures)

Feb 12, 2020 · To create a flexible pavement, small stone pieces are crushed up and either pressed together or mixed with a glue-like material known as bitumen. The bitumen is heated to about 300 degrees Fahrenheit (150 degrees Celsius) before the stone is added. Machines then lay the mixture onto the road, creating the pavement the cars drive on.

Publications - Florida Department of Transportation

2018 Rigid Pavement Design Manual (RPDM) 11/01/17 Summary of Changes to 2018 RPDM : 11/01/17 : September 2016 Implementation Memo - Flexible Pavement Design Manual : 09/12/16: September 2016 Flexible Pavement Design Manual : 09/12/16: March 2015 Implementation Memo - Flexible Pavement Design Manual : 03/11/15: March 2015 Flexible Pavement ...

Chapter 5 - Signs of Pavement and Bridge Distress and Fix ...

Distresses and recommended fixes for HMA over pavements are the same as those for flexible pavements with the addition of joint reflective cracking from slab and crush & shaping, respectively. In general, fix lives are lower and distress quantities are higher for composite pavements than for flexible pavements.

Technical Report Documentation Page - LRRB

The most common flexible pavement distresses are cracking, roughness, weathering, raveling, rutting and bleeding. If the distresses identified in a pavement are related to structural deficiencies, the pavement section is most likely not a candidate for preventive maintenance treatment, and should be scheduled for rehabilitation or reconstruction.

A Pavement Rating System

Flexible Pavement Distress Manual, Local Road Research Board. Surface Condition Rating System, NCHRP Project 10-9, Civil and Mineral Engineering Department, University of Minnesota, January 1973. Full-Depth Asphalt Patching, Asphalt Institute, CL-19. Overlays and Pavement …


water-induced distress in flexible pavement in a wet tropical climate A wet tropical climate characterized by abundance of rainfall and cool nights followed by hot days offers a favorable environment for the development of water-associated distress in flexible pavement.

Correlation Analysis between Temperature Indices and ...

Dec 04, 2017 · Temperature is the most influential climatic variable for flexible pavement design using a mechanistic-empirical approach. While the effect of climatic variables on pavement designs has been previously investigated, few studies went further to seek potential temperature indices to correlate with distress predictions of flexible pavement.

Types Of Failures In Flexible Pavements

The different types of failures in flexible pavements are described below: 1. Subgrade failure. 2. Base failure or base course failure. 3. Surface failure or wearing course failure. 1. Subgrade Failure: Excessive deformation in subgrade soil of a flexible failure is called subgrade failure. This is one of the main causes of failure of flexible …


Sep 09, 2015 · The flexible pavement, having less flexural strength, acts like a flexible sheet (e.g. bituminous road). On the contrary, in rigid pavements, wheel loads are transferred to sub-grade soil by flexural strength of the pavement and the pavement acts like a rigid plate (e.g. cement roads).

PPT – Pavement Distress and Maintenance PowerPoint ...

Pavement Distress and Maintenance – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow - id: 751d4-ZDc1Z


pavement distresses. The following is a partial check list of items that should be investigated during the field survey for pavement design projects: A. Existing Pavement Condition 1. Cracking (Type, Severity and Quantity) 2. Rutting (Depth) 3. Other Pavement Distresses 4. Surface Course (Type, Condition and Width) 5. Maintenance (Type and ...

NCDOT Digital Imagery Distress Evaluation Handbook

Raters should be especially cautious about rating pavement distresses or maintenance activities where the color change between the pavement and the feature is so subtle that the feature is hard to see in the pavement (downward) view, but may be visible in the forward view. Examples are skin patching and bleeding of flexible pavements and full width


pavement distress survey, materials sampling, and layer thickness information, to determine the pavement layer moduli, and other parameters of both rigid and flexible pavements. FWD testing in NYSDOT is currently limited to the following activities:! Deflection survey of 50 statewide sites as a part of pavement performance monitoring program.