Bituminous mix design is a delicate balancing act between the proportions of aggregate sizes and bitumen content. For a given aggregate gradation, the optimum bitumen content is estimated by satisfying a number of mix design parameters recommended in the specifications. In this paper, some of new considerations related to the bituminous mix design are discussed. Bituminous mix design, with thes...

Asphalt pavement recycling has grown dramatically over the last few years as the preferred way to rehabilitate existing asphalt pavements. Rehabilitation of existing asphalt pavements has employed different techniques; one of them, cold in-place recycling with foamed asphalt (CIR-foam), has been effectively applied in Iowa. However, Iowa’s current cold in-place recycling (CIR) practice utilizes...

A mix design, using a mixture of sand and mine tailings as aggregates, was selected to produce cement-based 3D printing material suitable for building purposes. Different dosage rates tailings, water, superplasticizers, accelerators were added the with end looking optimum strength, workability buildability. The term buildability includes aspects such pumpability printability. tests carried out ...

Artificial Neural Networks (ANN) trained using backpropagation (BP) algorithm are commonly used for modeling material behavior associated with non-linear, complex or unknown interactions among the material constituents. Despite multidisciplinary applications of back-propagation neural networks (BPNN), the BP algorithm possesses the inherent drawback of getting trapped in local minima and slowly...

Nowadays, disposal of waste materials has become a matter of serious concern due to environmental and ecological issues. In this paper, an attempt is made to determine an optimum proportion mix suitable for geotechnical applications by blending the locally available clayey soil with sand, fly ash, tile waste and jute fibers. This optimum mix provides a cheaper construction material and helps in...

Many technologies have lifecycles that are shorter than the lifecycle of the product they are in. Lifecycle mismatches caused by the obsolescence of technology (and particularly the obsolescence of electronic parts) results in high sustainment costs for long field life systems, e.g., avionics and military systems. This paper presents a methodology for performing optimum design refresh planning ...

In this study mix proportion parameters of lightweight foamed concrete (LWFC) are analyzed by using the Taguchi’s experiment design methodology for optimal design. For that purpose, mixtures are designed in L16 orthogonal array with five factors, namely, Microwave Incinerated Rice Husk Ash (MIRHA) contents, water cementitious ratio (w/c), sand cement ratio (s/c), superplasticizier (SP) content,...

self compacting concrete (scc) specimens with limestone (l) and quartz (q) powders were formulated. the influence of the type of the powder on the properties of fresh and hardened concrete was evaluated. dense packing theories were used for mix design of samples. the equation of fuller and thompson for particle size distribution (psd) of aggregates was modified with considering fine particles a...