Instructions : 1) Answer any five full questions. 2) Missing data may be suitably assumed. 1. a) Mention and explain the desirable properties of road aggregates.
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b) Explain the following : i) Immersion trafficking test ii) Methods to improve adhesion. 2. a) Explain the origin, preparation, chemical constitution and uses of bitumen. Write a note on modified bitumen.
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b) Explain the following : i) Thin film oven test ii) Separation test. 3. a) Briefly explain the various factors which may cause hardening of a binder under service conditions.
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b) Explain the following : i) Cutback ii) Bituminous emulsion.
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4. a) What are the fundamental properties of binder/stone/water system ? Explain any one theory to evaluate the adhesion property of bitumen on road aggregates. 10 b) Briefly explain the procedure for proportioning of aggregates by ROTHFUTCH’s method. 10
P.T.O.
*ME-112*
ME – 112
5. a) Explain the step by step procedure of designing and bituminous mix by Marshall method. 10 b) A bituminous concrete mix is prepared with aggregates A, B and C mixed in the proportion 40 : 58 : 02. The relative specific gravities of A, B, C and bitumen are 2.72, 2.67, 3.10 and 1.02 respectively. The prepared specimen weighs 1270 gms in air and 730 gms in water. The bitumen content by weight of aggregate is 5.5 %. Determine the following : 10 i) Maximum theoretical density ii) Total air voids iii) VMA iv) VFB. 6. a) Enumerate the important properties of cement concrete and their influence on long term service of a concrete road. 10 b) What is superpave ? Explain the principle and working of a superpave Gyratory compactor. 10 7. a) Briefly explain the procedure of superpave mix design method.
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b) Explain the following : i) Dynamic Shear Rheometer ii) Direct Tension Tester. 8. Explain the following :
10 (4×5=20)
i) Air entrained concrete ii) Joint fillers and sealers iii) Open graded and dense graded bituminous mixes iv) Handling of modified bituminous mix. _____________________
10. 7. a) Briefly explain the procedure of superpave mix design method. 10. b) Explain the following : i) Dynamic Shear Rheometer. ii) Direct Tension Tester. 10.
Explain the principle and working of a superpave gyratory. compactor. 10. 7. a) Explain the following : i) Rotational viscometer. ii) Bending beam rheometer. 10.
Out R, Out L, Swivel Steps, Scissor Step R + L. (Restart second and 5 round). Mambo Forward, Sailor Shuffle Turning 1â2 L. Pavement Ends - The Florida Dance.
having isocyanate-reactive groups (a polyol) and a second component .... particle or re?ective element Wicking/ anchorage (preferably, an open time of at least ...
Nov 12, 2004 - at the 32nd Annual Polyurethane Technical/Marketing Con. 3,556,637 A ..... properties of the liquid coating and contribute to the bulk volume of ...
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