we use many kinds of combinations of raw materials and production levels in producing composite materials. testing all the states are difficult or even impossible. taguchi method is a numerical method which predicts optimum state of composite materials using special orthogonal arrays. in this research we have discussed useablity of this method and its’ potential in finding optimum mix design of...

Concrete, the most consumed man-made material worldwide, has shaped environment and modern world. Even though concrete is a major contributor to carbon footprint, it indispensable for building sustainable world of tomorrow. Researchers have been exploring ways reduce footprint implement strategical waste management plans in which wastes are repurposed. Pollution challenge almost all countries, ...

Bituminous mix design is a delicate balancing act among the proportions of various aggregate sizes and bitumen content. For a given aggregate gradation, the optimum bitumen content is estimated by satisfying a number of mix design parameters. This article briefly discusses the current approaches in bituminous mix design and singles out the issues involved.

A satisfactory bituminous mix should have aggregate gradation, which will ensure maximum density and minimum voids in the mix to fulfill requirements of bituminous mix design specifications. In India organizations such as Indian Roads Congress and Ministry of Surface Transport (MOST) [1] have laid down specifications regarding the range of percentage passing of different size of aggregate in th...

rutting of hot mix asphalt pavements due to increased number of heavy vehicles, especially in tropical regions, causes several performance problems. large stone asphalt mixtures have more stiffness and shear resistance and so more rutting resistance compared to conventional mixtures. hence, using these mixtures in thick layers of hot mix asphalt pavements at tropical regions could be an appropr...

The development of transportation plays an important role in the development of nation. With flexible pavements being widely used in India, steps must be taken to increase the life of the bituminous pavements. Flexible pavements are often plagued with problems of cracking and rutting due to repeated traffic loads. Hence one needs to address these problems in order to improve the performance of ...

pavement permanent deformations due to lack of shear strength in mixture are a major reason of rutting. any simple test to determine mixtures resistance to permanent deformation isn’t distinguished in the 1st level of superpave mix design method and prevalent methods for evaluating mixture rut resistance are expensive and time-consuming. two aggregate types, gradations, asphalt cements and fill...