JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. The main objective of this course is to provide students with a thorough understanding of the important factors in pavement design and analysis.
• 2. The focus will be on practices of pavement design of highway agencies.

Course Outcomes

At the end of the course, students will be able to

• 1. Determine the proportions of ingredients required for the mix design of both asphalt mixtures and cement concrete.
• 2. Characterize the pavement materials including soil, aggregate, cement, asphalt mixtures, cement concrete.
• 3. Select appropriate asphalt binder for construction of a flexible pavement depending upon the traffic and climatic conditions.
• 4. Choose appropriate stabilization technique for pavement.
• 5. Understand the basic of cement & cement concrete mix characterization.

UNIT - I

Subgrade Soil Characterization: Properties of subgrade layers; different types of soils, Mechanical response of soil; Soil Classification; Index and other basic properties of soil; A critical look at the different laboratory and in-situ procedures for evaluating the mechanical properties of soils viz. SPT, DCPT, CPT, CBR, Plate Load test & resilient modulus; Suitability of different type of soil for the construction of highway embankments and pavement layers; Field compaction and control. Dynamic properties of soil: FWD test.

UNIT - II

Introduction to Soil Stabilization: Physical and Chemical modification: Stabilization with admixtures like cement, lime, calcium chloride, fly ash and bitumen. Grouting: Categories of grouting, Art of grouting, Grout materials, Grouting techniques and control. Introduction to Ground improvement techniques; Introduction to Geo textiles and synthetics applications.

UNIT - III

Aggregate Characterization: Origin, Classification, Types of aggregates; Sampling of aggregates; Mechanical and shape properties of aggregates, Aggregate texture and skid resistance, polishing of aggregates; Proportioning and Blending of aggregates: Super pave gradation, Fuller and Thompson’s Equation, 0.45 power maximum density graph; Use of locally available materials in lieu of aggregates.

UNIT - IV

Bitumen and Bituminous Concrete Mix Characterization: Bitumen sources and manufacturing, Chemistry of bitumen, bitumen structure, Rheology of bitumen, Elastic modulus, Dynamic modulus, visco-elastic and fatigue properties, creep test, stiffness modulus of bitumen mixes using shell nomographs; Resilient, Diametral Resilient and Complex (Dynamic) Moduli of Bituminous Mixes, Permanent Deformation Parameters and other Properties.Modified bitumen: Crumb Rubber Modified bitumen, Natural rubber modified bitumen, polymer modified bitumen; Introduction to emulsified bitumen and its characterization; Long term and short term ageing and its effect on bitumen performance, Tests to simulate ageing of bitumen viz. RTFOT and PAV.

R19 M.TECH HIGHWAY ENGG.

Desirable properties of bituminous mixes, Design of bituminous mixes: Modified Marshall’s specifications, Hubbard Field method of mix design, Hveem’s method of mix design; Introduction to super pave mix design procedure

UNIT - V

Cement and Cement Concrete Mix Characterization: Types of cements and basic cement properties, Special cements; Quality tests on cement; Tests on cement concrete including compressive strength, flexural strength, modulus of elasticity and fatigue properties; Introduction to advanced concretes like self compacted concrete, Light weight concrete, Roller Compacted Concrete for pavement application; IS method of cement concrete mix design with case studies; Role of different admixtures in cement concrete performance; Joint fillers for Jointed Plain Cement Concrete Pavements and their characterization; Nano technology applications in cement concrete.

REFERENCE BOOKS:

• 1. Atkins, N. Harold, Highway Materials, Soils and Concretes, Fourth Edition, 2002, Prentice-Hall. 2: Kerbs Robert D. and Richard D. Walker, Highway Materials, McGraw-Hill, 1971.
• 3. Relevant IRC and IS Codes of Practices (Separate List will be given).
• 4. Read, J. And Whiteoak, D., “The Shell Bitumen Handbook”, Fifth edition, Shell Bitumen, Thomas Telford Publishing, London 2003 5 Relevant IRC and IS codes R19 M.TECH HIGHWAY ENGG. M.TECH.- I YEAR- I SEMESTER HIGHWAY ENGINEERING