Question

Case study: mechanical evaluation of asphalt mastics produced using waste stone sawdust.

Write abstract and introduction and conclusion with deep information about the topic.

Answer 1

Abstract :

We performed the test and it measures the strain at different loading frequencies by the use of dynamic shear rheometers and got shear modulus(G∗) findings of this study showed that the stone sawdust filler demonstrated high resistance to fatigue and rutting. However, the elastic behavior of the asphalt mastics was increased with the increase in volume ratio.

Introduction:

The mechanical properties and behavior of asphalt binder affects significantly the properties of asphalt mixture and hence play a big role in the performance of asphalt pavements. The complexity of asphalt binder comes from the visco-elastic nature of this material. Its properties and behavior aretime and temperature dependent. In addition, the mode of loading impacts this behavior. High stiffness and elastic behaviors are desired properties for asphalt binders used in hot mix asphalt design and production. High stiffness is required to resist rutting under heavy loads in pavements. On the other hand elastic behavior is also needed to recover and heal part of the deformations under loading.

Conclusion :

Waste stone sawdust showed higher resistance to fatigue.

Waste stone sawdust-asphalt mastic also showed high resistance to rutting.

The mastic-to-binder modulus ratio was found to decrease with the increase in loading frequency at all temperatures and volume ratios. In addition, the modulus ratio increased nonlinearly with the increase in the volume ratio; the best model that described this relationship is the exponential model with a high coefficient of determination (r2).