Discuss the pros and cons of JPCP versus JRCP.
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- Discuss the pros and cons of JPCP versus JRCP.
- What is meant by the mechanistic-empirical method of pavement design? Is it possible to develop a wholly mechanistic method of pavement design? Why?
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- Describe these five (5) types of pavement deformations (A-E) and then discuss the causes and propose the proper solutions of each type.1- What are the two main criteria of pavement failure in mechanistic-experimental design approach? Explain the type and location of applied stresses.What is the reliability value that should be used in the flexible pavement design equation if the goal is to ensure that serviceability will be maintained at adequate levels throughout the design life of the facility with 86% probability? (please provide your answer with at least 3 digits after the decimal place)
- Define precisely the difference between pavement serviceability and performance. Using a sketch to indicate the concept of remaining service life of a pavement segment.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 strengthExplain with sketches, the basis of Austroads mechanistic pavement thickness design method (i.e. what theories and assumptions are these methods based on). What is the major difference between the Austroads mechanistic-empirical (CIRCLY) design method and other mechanistic-empirical design methods?
- Elaborate restoration process of pavement rehabilitation techniques and suggest thesuitability of this technique in solving various pavement distresses.Mechanistic design procedure is based on the assumption that a pavement can be modelled as multi-layered elastic or viscoelastic. Discuss the combination of Visco-elastic considerations assumption in pavement design procedure.Determine 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…
- Q: Discuss various Design, Construction, and Supervision factors causing pavement failures? Subject: Pavement Structure and design. Program: MS in Transportation Engineering1. a) What is the difference between flexible, rigid and composite pavement? b) List at least three types of pavement distress for flexible and rigid pavement, respectively. c) What is the most common distress for composite pavement (asphalt overlay on concrete).A rigid pavement is being designed with the same parameters as used in Problem 4.5. The modulus of subgrade reaction is 300 lb/in? and the slab thickness is determined to be 8.5 inches. The load transfer coefficient is 3.0, the drainage coefficient is 1.0, and the modulus of elasticity is 4 million 1b/in?. What is the design modulus of rupture? (Assume that any parameters not given in this problem are the same as those given in Problem 4.5.) 4.5 for reference: A flexible pavement was designed for the following daily traffic with a 12-year design life: 1300 single axles at 8000 Ib each, 900 tandem axles at 15,000 1b each, 20 single axles at 40,000 Ib each, and200 tandem axles at 40,000 lb each. The highway was designed with 4 inches of HMA wearing surface,