The effects of recycled-branched polypropylenes on their rheological properties and foamability are studied and compared with the virgin sample in this paper. The main idea is to explore the possibility of using recycled materials to make the acceptable foam products. The recycled polypropylenes showed the lower melt strength due to the disentanglement. However, the viscosity at a high shear ra...

Contaminated groundwater resulting from pyrite oxidation of acid sulphate soils (ASS) is a major environmental problem in coastal Australia. A column test was carried out for an extended period with recycled concrete to study the efficiency of the reactive materials for neutralising acidic groundwater. Results show that the actual acid neutralisation capacity of the recycled concrete could decr...

The use of recycled materials reduces the need for primary materials and it also minimizes the amount of waste in the production process. Therefore, by using recycled materials, the total material flow necessary for the production of a product can be reduced. Moreover, the total consumption of resources for the production of recycled material is, usually, remarkably inferior that in the product...

There is an increasing requirement for the production of concrete globally, due to rapid infrastructure development, leading to shortage in the availability of raw materials, which in turn increase its costs. At the same time, many waste materials are also produced as by-products from various industries and construction sites, the disposal of which cause a major problem. Thus it becomes necessa...

Material adsorption, the reverse process of evaporation diffusion, directly reflects the wettability of materials. Wettability is one of the main factors that affect the drying shrinkage of materials. A device that measures the wettability of recycled aggregate concrete (RAC) with fly ash is proposed in this study based on pore structure theory. The isothermal absorption curve of RAC is examine...

The ultimate fate of products is an important issue in conducting environmental life cycle assessments, setting public policy on product disposal and tracing materials flows over time. This case study illustrates a methodology for estimating the fate of such products, focusing on personal computers. The methodology can be applied to a wide range of consumer products. Discarded or obsolete perso...

Reducing waste material plays an essential role for engineers in the current world. Nowadays, recycled materials are going to be used in order to manufacture concrete beams. Previous studies concluded that the currently proposed formulas to predict the flexural and shear behavior of the reinforced concrete beams were not appropriate for those manufactured by recycled materials. This study aims ...

A social study was performed on how to assess concrete material sustainability in the Japanese concrete industry. The perspectives were converted to weights using Analytic Hierarchy Process, a multi-criteria decision-making tool, and the sustainability of several concrete mixtures was compared. It was found that fly ash concrete mixes with normal or recycled aggregates had the highest weights, ...