Materials Overview for Business Transformation Office
This provides insights into the role of VDOT Materials Division in construction, quality control measures, acceptance processes, staff positions, and functional areas within the division. It also outlines the laboratories and sections under VDOT related to materials engineering.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Reinforcement Design Rigid Pavement Reni Karno Kinasih Universitas Mercu Buana
The Portland cement concrete commonly used for rigid pavements consists of Portland cement, coarse aggregate, fine aggregate, and water. Steel reinforcing rods may or may not be used, depending on the type constructed of pavement being
Reinforcing Steel Steel reinforcing used in concrete pavements for Reduce the amount of cracking that occurs, As a load transfer mechanism at joints, As a means of tying two slabs together.
Types of steel reinforcement Types of steel reinforcement can be classified as follows: Steel reinforcement used to control cracking is usually referred to as temperature steel, Steel rods used as load transfer mechanisms are known as dowel bars, And those used to connect two slabs together are known as tie bars.
Reinforcement Design Parameters 1. Steel working stress 2. Friction factor 3. Longitudinal & transverse steel reinforcing 4. Tie bar 5. Dowel
Steel Working Stress Allowable working stress fs untuk grade 40 = 30.000 psi.
LONGITUDINAL & TRANSVERSE STEEL REINFORCING Prosen longitudinal & transverse steel diperlukan :
Tie Bars Tie bars are used to tie two sections of the pavement together, and therefore they should be either deformed bars or should contain hooks to facilitate the bonding of the two sections of the concrete pavement with the bar. These bars are usually much smaller in diameter than the dowel bars and are spaced at larger centers. Typical diameter and spacing for these bars are 3 4 in. and 3 ft, respectively.
Tie Bar Tie Bar dirancang untuk: Memegang plat sehingga teguh, dan Menahan gaya-gaya tarik maksimum. Tie bar tidak dirancang untuk memindah beban Jarak Tie Bar
Dowel Bars Dowel bars are used mainly as load-transfer mechanisms across joints. They provide flexural, shearing, and bearing resistance. The dowel bars must be of a much larger diameter than the wires used in temperature steel. Diameters of 1 to 11 2 in. and lengths of 2 to 3 ft have been used, with the bars usually spaced at 1 ft centers across the width of the slab. At least one end of the bar should be smooth and lubricated to facilitate free expansion.
Dowel Alat pemindah beban yang biasa dipakai adalah dowel baja bulat polos. Syarat perancangan minimum dapat mengacu pada Tabel 2.11
Penentuan diameter dowel dapat menggunakan pendekatan formula : d = D/8 dimana : d = Diamater dowel (inches) D = Tebal pelat beton (inches)
Reference Perkerasan Jalan Beton Semen Portland (Rigid Pavement), Ari Suryawan, Beta Offset, Yogyakarta, 2009 Modul RDE-11: Perencanaan Perkerasan Jalan , Pusat Pembinaan Kompetensi dan Pelatihan Konstruksi, Departemen Pekerjaan Umum, 2005 Structural Design of Highway, Al-Mustansiriyah University College of Engineering, Dr. Noor Moutaz Asmael AASHTO Guide for Design of Pavement Structures, 1993, Washington DC
Thank you See you next on Joints in Rigid Pavements
