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The document discusses Benkelman beam deflection studies and types of overlays for different pavement types. It begins with an introduction to the Benkelman beam method for measuring pavement surface deflections. It then describes experimental setup and results of Benkelman beam deflection testing on a runway. The conclusion indicates the existing runway pavement requires strengthening. The document ends by describing different types of overlays for flexible and rigid pavements, including steps for designing overlays.
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- The key equations, parameters, and design process for both flexible and rigid pavement structures
It describes how the AASHTO Guide is based on predicting the decrease in serviceability over time under traffic loading using reliability concepts. The design process involves calculating the structural number for flexible pavements or slab thickness for rigid pavements based on traffic, materials properties, and reliability factors.
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1) Westergaard's definition of modulus of subgrade reaction and radius of relative stiffness, which characterize the interaction between the rigid pavement slab and underlying soil.
2) Westergaard's stress equations which calculate critical stresses at interior, edge, and corner regions due to wheel loads and temperature variations.
3) Considerations for joint design including expansion joints, contraction joints, dowel bars, and tie bars to allow for movement while transferring loads between panels.
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2) An analysis of strains in flexible pavements with different base layers (granular base and cement treated base) under single wheel, dual wheel, and tandem axle loads using KENPAVE software.
3) The maximum tensile strains at the bottom of the surface course and maximum compressive strains at the top of the subgrade were identified as critical locations for fatigue cracking and rutting, respectively.
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Types of Pavements, Layers present in the pavements, Stresses on the rigid pavements, wheel load, repetitions etc.. and Indian Standard Method of design of Rigid Pavements.
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The document provides information on pavement design, including different types of pavement structures and methods for designing asphalt and rigid pavements. It discusses asphalt pavement design using the AASHTO 1993 method, which involves determining the structural number required based on factors like traffic loading, material properties, and desired service life. It also outlines the rigid pavement design method, touching on considerations like soil properties, material selection, thickness design, drainage, and reinforcement.
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Concrete pavement components include concrete slabs of a determined thickness, joints to control cracking, tie bars at joints to hold slabs together, and dowel bars at transverse joints to allow load transfer between slabs. A stable base layer, optional subbase layer, and subgrade provide the foundation. Proper preparation of these layers and placement of reinforcement like tie and dowel bars according to specifications is important for a strong, durable pavement. Both rigid concrete and flexible asphalt pavements are designed based on factors like traffic levels, soil properties, environment, and desired reliability and service life.
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Abstract
Static and dynamic cone penetration tests are widely used in Foundation engineering for measuring the penetration resistance of the
ground and for relating it to the degree of compaction and safe bearing capacity of soils. In Highway Engineering, Pavement
Dynamic Cone Penetrometer (DCP) is used for rapid in-situ strength evaluation of subgrade and other unbound pavement layers. In
the present studies, an attempt has been made to identify the strength and thickness of different pavement layers of newly constructed
low volume roads in the State of Karnataka, India using dynamic cone penetration studies and was compared with actual
measurements at the site. The evaluation of pavement test stretches was made for a period of two years, and changes in penetration
resistance of different pavement layers were measured. A Software was used to analyze the DCP data and to correlate with field
observation. The results have favoured the possibility of using dynamic cone penetrometer as a quality control and pavement
monitoring tool for low volume roads, eliminating the need for a Benkelman beam or a falling weight deflectometer.
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This document discusses evaluating the characteristics of existing flexible pavements through non-destructive testing methods. It provides background on the increasing usage of road infrastructure globally and the need to evaluate pavement strength and durability. The document focuses on using the Benkelman Beam test to measure pavement deflections under load and analyze structural capacity. It reviews several past studies that have evaluated relationships between Benkelman Beam test results and other testing methods and explored using deflection measurements to determine rehabilitation needs.
Strengthening and Maintenance of a Flexible Road Pavement Using Benkelman Bea...
The document summarizes a study on strengthening and maintaining a flexible road pavement in Idukki district, Kerala, India using the Benkelman Beam Deflection method. Two 5km stretches of a major district road were selected for evaluation. Functional evaluation through visual observation and structural evaluation using the Benkelman Beam Deflection technique and core cutting were conducted. Soil samples were also collected and traffic was studied. Deflection data was analyzed and an appropriate overlay design was selected based on characteristic deflection and design traffic to strengthen the pavement.
Unit_IV.pptx
The document provides information on the analysis and design of flexible and rigid pavements. It discusses the components and functions of flexible and rigid pavements. It describes the computation of design traffic and stresses in flexible pavements. It covers factors affecting rigid pavement design, equivalent single wheel loads, and mechanistic-empirical design approaches. The document also discusses traffic evaluation and classification into different categories for pavement design purposes.
Non destructive testing (Civil Engineering )
This presentation describes 6 methods to check concrete sample by performing non destructive testing.
1. Rebound hammer
2. Dye penetration test
3. Pull out test for concrete
4.Half cell potentiometer test
5.Rebar scanner
6 ultrasonic pulse velocity test
Village networking ppt
Here are the key steps for designing the flexible pavement:
1. Design life = 15 years (as per guidelines for highways)
2. Traffic growth rate = 5% per annum (assumed)
3. Calculate design traffic in msa using traffic growth rate and design life
4. Conduct soil tests to determine CBR value of subgrade soil
5. Select pavement layers and their thicknesses using design charts as per IRC guidelines based on design traffic and CBR value.
6. Check stability and serviceability requirements are satisfied.
7. Specify materials, compaction requirements and construction methods for each pavement layer.
8. Prepare detailed cost estimate and drawings for construction.
presentation on road pavement (zeeshan)
This document discusses the design aspects of flexible pavements and quality control management. It describes the typical components of a flexible pavement including the surface course, base course, sub-base course, and soil subgrade. It then provides details on the design of service roads including subgrade construction, wet mix macadam construction, and dense bituminous macadam and bituminous concrete construction. The document emphasizes quality control measures throughout construction.
Rigid pavement
Rigid pavements are concrete slabs that distribute vehicle loads through beam action. They have high flexural strength and small deflections compared to flexible pavements. The presentation discusses the types of rigid pavements including jointed plain concrete, jointed reinforced concrete, and continuously reinforced concrete pavements. It also covers the design factors for rigid pavements such as traffic loading, subgrade strength, environmental conditions, and material properties. Rigid pavements are designed to last 30 years with minimal maintenance required over the design life.
Non Destructive test
This document summarizes several non-destructive testing methods for concrete, including:
- Rebound hammer testing, which measures surface hardness to estimate strength. Factors like surface smoothness and moisture affect results.
- Ultrasonic pulse velocity testing, which times pulse transmission through concrete to determine strength. Transducers can be placed on different faces.
- Penetration and pull-out tests, which measure hardness by probe penetration depth or pull-out force, respectively, and correlate to strength. Surface damage occurs.
- Acoustic, radioactive, and nuclear methods have also been used to study crack initiation and location defects, though radioactive techniques risk safety issues.
Box culverts
The document summarizes a student group's summer training project constructing a box culvert for the North Western Railway in Banswara, India. It describes the project details, components and materials of the box culvert, laboratory and field tests conducted, concrete mix design, construction layout, execution process, and structural analysis considering various loads. The students gained hands-on experience applying their classroom knowledge to the real-world construction of the box culvert.
Rehabilitation of Flexible Pavements.pptx
The document discusses methods for rehabilitating existing pavement to extend its service life. It describes reasons for rehabilitation such as structural failure, drainage issues, increased traffic loads, or needing to upgrade geometric standards. Common rehabilitation techniques include overlays, which can be asphalt, concrete, or ultra-thin concrete. The document provides details on evaluating pavement performance, designing overlays using methods like component analysis or deflection testing, and guidelines from organizations like AASHTO.
Similar to Te assignment by hemant (1) (20)
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
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Strengthening and Maintenance of a Flexible Road Pavement Using Benkelman Bea...
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Recently uploaded
AI-Based Home Security System : Home security
Home security is of paramount importance in today's world, where we rely more on technology, home
security is crucial. Using technology to make homes safer and easier to control from anywhere is
important. Home security is important for the occupant’s safety. In this paper, we came up with a low cost,
AI based model home security system. The system has a user-friendly interface, allowing users to start
model training and face detection with simple keyboard commands. Our goal is to introduce an innovative
home security system using facial recognition technology. Unlike traditional systems, this system trains
and saves images of friends and family members. The system scans this folder to recognize familiar faces
and provides real-time monitoring. If an unfamiliar face is detected, it promptly sends an email alert,
ensuring a proactive response to potential security threats.
Data Driven Maintenance | UReason Webinar
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
原版一模一样【微信：741003700 】【(uofo毕业证书)美国俄勒冈大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
OOPS_Lab_Manual - programs using C++ programming language
This manual contains programs on object oriented programming concepts using C++ language.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
原版制作(Humboldt毕业证书)柏林大学毕业证学位证一模一样
原件一模一样【微信：bwp0011】《(Humboldt毕业证书)柏林大学毕业证学位证》【微信：bwp0011】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问微bwp0011
【主营项目】
一.毕业证【微bwp0011】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【微bwp0011】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Object Oriented Analysis and Design - OOAD
This ppt gives detailed description of Object Oriented Analysis and design.
Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
LLM Fine Tuning with QLoRA Cassandra Lunch 4, presented by Anant
Slides for the 4th Presentation on LLM Fine-Tuning with QLoRA Presented by Anant, featuring DataStax Astra
Pressure Relief valve used in flow line to release the over pressure at our d...
Pressure Relief valve used in flow line to release the over pressure at our desired pressure
一比一原版(爱大毕业证书)爱荷华大学毕业证如何办理
原版一模一样【微信：741003700 】【(爱大毕业证书)爱荷华大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(爱大毕业证书)爱荷华大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
smart pill dispenser is designed to improve medication adherence and safety f...
Smart Pill Dispenser that boosts medication adherence, empowers patients, enables remote monitoring, enhances safety, reduces healthcare costs, and contributes to data-driven healthcare improvements
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1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
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OOPS_Lab_Manual - programs using C++ programming language
OOPS_Lab_Manual - programs using C++ programming language
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
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2. protection of river banks and bed erosion protection works.ppt
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LLM Fine Tuning with QLoRA Cassandra Lunch 4, presented by Anant
LLM Fine Tuning with QLoRA Cassandra Lunch 4, presented by Anant
Pressure Relief valve used in flow line to release the over pressure at our d...
Pressure Relief valve used in flow line to release the over pressure at our d...
smart pill dispenser is designed to improve medication adherence and safety f...
smart pill dispenser is designed to improve medication adherence and safety f...
Te assignment by hemant (1)
- 1. UNIVERSITY INSTITUTE OF ENGINEERING AND TECHNOLOGY, M.D.U. (ROHTAK) ASSIGNMENT OF TRANSPORT ENGGINEERING || TOPIC- BENKELMAN BEAM DEFLECTION STUDIES & TYPES OF OVERLAY IN DIFFERENT TYPES OF PAVEMENT SUBMITTED TO:Er. Amit Laura MADE BY: Hemant Mathur(19324) 6th Sem.
- 2. OUTLINES: ● Brief Description about the Benkelman Beam Method ● Types of Overlay in various type of Pavements
- 3. INTRODUCTION ● BENKELMAN BEAM METHOD The benkelman beam method is one of the methods for measuring surface deflections in field. A pavement is regarded as having insufficient strength if the deflection measuredv under a test load exceeds a predetermined value related to the traffic expected.
- 4. PAVEMENT CONDITION SURVEY ● This phase of operation, which shall precede the actual deflection measurement, consist primarily of visual observations supplemented by simple measurements of rut-depth using a 3metre straight edge. Based on these the road length shall be classified
- 5. EXPERIMENTAL SETUP ● The arrangement was made for Benkelman Beam Deflection Test on runway for evaluation of structural capacity of Existing Flexible of Pavement. It was decided that 8 sets of the observations of the Benkelman Beam Deflection Test may be taken.
- 6. BBD RESULTS AND ANALYSIS ● Benkelman Beam Deflection (BBD) technique is widely used all over the world for Evaluation of structural capacity of Existing Flexible Pavements and also for Estimation and Design of overlays for strengthening of any weak pavement. The various parameters like pavement surface temperature, subgrade soil type, its moisture content and compaction, the thickness and quality of pavement courses, drainage conditions and their influence on pavement deflections.
- 8. CONCLUSION It may be noted that the existing pavement structure of runway for Surat Airport is required to sustain the dynamic load of Aircraft of A319, A320 and CRJ-700 for only one flight per day at present. If the flight frequency increases in future the same pavement crust thickness will not be able to perform as seen from the values of the Characteristic Deflections varies from 1.77 mm to 3.114mm unless appropriate actions for strengthening of pavement structure.
- 10. TYPE OF OVERLAYS IN VARIOUS TYPE OF PAVEMENT ● Overlay thickness is about the same as that for a new concrete pavement to be effective. Cracked concrete slab needs to be repaired before bonded or partially bonded PCC overlay.Cracked concrete slab corner needs to be repaired before or partially bonded PCC overlay.
- 11. DESIGN OF OVERLAY FOR FLEXIBLE PAVEMENT
- 12. TYPES OF OVERLAYS Asphalt overlay over asphalt pavements ● Asphalt overlays on CC pavements ● CC overlays on asphalt pavements ● CC overlays on CC pavements
- 13. STEPS IN DESIGN OF OVERLAYS ● Measurement and estimation of the strength of the existing pavement ● Design life of overlaid pavement ● Estimation of the traffic to be carried by the overlaid pavement ● Determination ofthe thickness and the type of overlay
- 15. FLEXIBLE OVERLAY OVER FLEXIBLE PAVEMENTS ● IRC guidelines given in ''IRC:S1 1997'' guidelines for strengthening of flexible road pavements using Benkelman beam method. INDIAN ROAD CONGRESS New Delhi 1997. The design is passed on the deflection values oof the pavement surface.
- 16. RIGID OVERLAY OVER RIGID PAVEMENTS ● Fully bonded and partially bonded overlays may be used if the existing pavement is sound or slightly cracked Partially bonded overlays may be used if the existing pavement is 'fairly' to 'moderately' cracked.Un-bonded overlay with 50mm bituminous seperation layer may be adopted if the slab is'moderately' or 'badly' cracked
- 17. RIGID OVERLAY FLEXIBLE PAVEMENTS ● The technique of providing cement concrete overlays on bituminous pavements is known as white topping. This is expected to save significant quantities of cement. ● The overlay thickness is determined using the design procedures for rigid pavements in normal way, value of K is restricted to 14kg/cm3. ● Before laying the concrete overlay, the profile of the existing pavement is made good by a levelling course of Bituminous mix.
- 18. END OF SLIDES