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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305577398
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Chapter 21, Problem 6P
To determine
The DR (Distress Rating) for the given pavement rating method by using six distress types.
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Q:
Discuss various Design, Construction, and Supervision factors causing pavement failures?
Subject: Pavement Structure and design.
Program: MS in Transportation Engineering
a) As a pavement inspector, you are assigned to assess a pavement condition. Following
photographs were taken during a survey from 2 locations of the pavement.
Figure 1: Location 1
Figure 2: Location 2
Describe these distresses with possible causes and repair techniques.
Pavement Condition Index (PCI) Survey is developed by US Army Corps of Engineers to quantify the condition of pavement section so it will enable decision- makers to decide on the most suitable maintenance method for the pavement section. Through the fieldwork survey and then the deskwork, the PCI values, which is used to indicate the general condition of a pavement section are obtained.
List FIVE (5) factors that influence the PCI values and elaborate briefly the relationship of each factor with the PCI values
Chapter 21 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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- A transportation agency is planning a pavement roughness data collection program to monitor statewide pavement performance. Assuming that 10 percent of change in roughness should be detectable at 95% confidence level, how many 1-mile pavement segments should be included in the annual condition survey? There are 20,000 center-line miles of pavement in total.arrow_forwardDetermine the base thickness of plain concrete pavement (PCP) without dowelled joints using the information and charts provided be • Desired project reliability - 85% Subgrade design CBR-6% • Design period -30 years • Design Traffic 5.0*10* HVAG(B) Note: The information obtained from each table or figure must be stated in the examination script to obtain relevant marks. Table 3.1: Minimum subbase requirements for rigid pavements Design traffic (HVAG) Subbase type 125 mm bound Up to 10⁰ Up to 5x10 150 mm bound or 125 mm LCS Up to 1x10 170 mm bound or 125 mm LCS 150 mm LCS Greater than 1x 10 1 Under CRCP, a heavily bound subbase with an asphalt surfacing is an acceptable alternative 75 Maximum permitted value CBR % Effective subgrade strength used in concrete base thickness determinations 60 50 40 35 30 25 20 15 12 10 Concrete Base 200 Thickness 190 (mm) 180 8. Pavement type 7. 6. 5. PCP Dowelled & CRCP 260 250 240 230 220 210 170 160 150 140 150mm LCS 125mm LCS 8 10 Design subgrade…arrow_forwardihal exam II. Identification. Identify the following terms 1. a little covered opening in a floor, pavement, or other surface that allows a person to enter, especially one that leads to a sewer in a city street. 2. The time frame in which the analysis will be carried out 3. is a process that aims to restore the structural effectiveness of the pavement while also providing superior riding and skid resistance. 4. The creation of one or more alternative routes or corridors is included in a broader analysis of the entire area. 5. It is the distance if one track to other. No new data to save. Last cherkedarrow_forward
- Q9. The preventive rehabilitation technique is that which involves: a) surface applications of either structural or nonstructural improvements intended to keep the quality of the pavement above a predetermined level b) all means that enables the designer to consider each maintenance alternative in terms of a final product and then select the most appropriate one in terms of results desired and cost. c) the permanent or temporary repair of deficiencies on an as-needed basis d) a and b e) b and c Q10. When compacting a soil at wet to optimum, then; a) the soil fabric is oriented and it has lower permeability b) the soil fabric is dispersed and it has lower permeability c) the soil fabric is dispersed and it has a higher strength d) the soil fabric is dispersed and it has a lower strengtharrow_forwardDiscuss the process and major considerations on the application/installation of pavement markings.arrow_forwardAssume that the overall pavement evaluation of Interstate highways in a district consists of four categories: Surface distress index = 75, drainage index = 80, roughness index = 85, and structural index = 90. For all indices, 100 represents the best condition. Calculate the overall pavement index (OPI) of the interstate highways in this district, if the relative weights of different indices are 0.20, 0.25, 0.28, and 0.27, respectively.arrow_forward
- Q#3. Discuss root causes and remedial measures of the following distresses occurring in flexible pavements: Slippage failure, Potholes, Rutting and its types, Bitumen bleeding Answer in word formatarrow_forwardDefine precisely the difference between pavement serviceability and performance. Using a sketch to indicate the concept of remaining service life of a pavement segment.arrow_forwardAn agency uses the following formula to determine pavement condition rating, PCR = 99.3 − 5.51 (5.0-ROUGH) − 1.59 LNALL − 0.221 AVGOUT − 0.0306 LONG − 0.531 TRAN, where we have the following. ROUGH = roughness measured by present serviceability rating (PSR), scale of 0 to 5 LNALL = natural logarithm of alligator cracking, ft per mile AVGOUT = outer wheel path rutting (all locations averaged), 0.01 inch LONG = longitudinal cracking, ft per mile TRAN = transverse cracking, number of cracks per mile And, present serviceability rating is determined as the following. PSR = 5e−0.0051118 · IRI − 0.0016027 A pavement section has the following distress data. IRI = 108 in./mi Alligator cracking = 110 ft/mi Average rutting = 0.20 in. Longitudinal cracks = 130 ft/mi Transverse cracks = 12/mi Determine the current PCR for this section. PCR = Now, assume a new roughness measurement is expected soon. When PCR falls below 60, the section will be scheduled for rehabilitation. Determine the new IRI…arrow_forward
- The following are the results of pavement distress survey: Distresses identified are: Alligator cracks, patching, raveling and bleeding. The corresponding factors are: 2.4, 2.0, 2.1, 1.5, respectively. The weights are: 9, 6, 3, 3, respectively. Compute the distress rating. Blank 1 Blank 1 Add your answerarrow_forwardDefine pavement management system (PMS) and describe its benefits.arrow_forwardDescribe these five (5) types of pavement deformations (A-E) and then discuss the causes and propose the proper solutions of each type.arrow_forward
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