polymer application for the improvement and modification of the bitumen used in roads surfaces has expanded in recent decades. the roads engineers and constructors, therefore, have used the modified bitumen in asphalts helping in this way to increase roads and pavements service life and improving the durability of the roads and asphalts. the bitumen used in asphalt mixture constitutes only a lo...

In this study, the upcycling and recycling applications for management of waste printed circuit boards (PCBs) were compared through sequential application Streamlined Life Cycle Assessment (S-LCA) Multi-Criteria Decision Making (MCDM) techniques. Upcycling determined as gold, copper-tin alloy, lead, copper recovery activated carbon production. And, portland cement, aggregate, sawdust, fiberglas...

Polymer modified concrete (PMC) consists of Portland cement concrete with a polymer modifier. Its advantages are proper bonding strength to substrate concrete, high tensile and flexural strength and low amount of shrinkage and permeability. Using PMC overlays can be considered as a method for preservation of damaged concrete structures due to their suitable performance and durability. In this r...

A two-stage upflow anaerobic sludge blanket (UASB) and sequencing batch reactor (SBR) system was introduced to treat landfill leachate for advanced removal of COD and nitrogen at low temperature. In order to improve the total nitrogen (TN) removal efficiency and to reduce the COD requirement for denitrification, the raw leachate with recycled SBR nitrification supernatant was pumped into the fi...

• Photo-actuation behavior was detected in the vulcanized rubber for first time. styrene-butadiene (SBR) composites filled with graphene nanoplatelets (GnPs) were investigated. ionic liquids significantly enhanced photo-actuation behavior. The effects of butylpyridinium bromide-based (ILs) on vulcanization kinetics, mechanical properties and ability Two different ILs, 1-butylpyridinium bromide ...

1,3-Butadiene, a major ingredient of synthetic rubber, has been shown to be carcinogenic in two animal species. To assess the possible human carcinogenicity of 1,3-butadiene, a critical review was undertaken of the epidemiologic literature. An early retrospective study of 8017 males employed in tire manufacturing found excess mortality for lymphatic and hematopoietic neoplasms in production wor...

effect of partial natural rubber replaced with synthetic rubbers, styrene butadiene and cis butadiene, on failure and strength properties of bias tread nr/br based compound was studied by efficient and conventional sulfur curing systems and mixtures of different carbon black grades. it was observed that failure behavior comprising tear resistance and crack growth in substituted compounds droppe...

A simple model is proposed to account for observed emissions of volatile organic compounds (VOCs) from new carpets. The model assumes that the VOCs originate predominantly in a uniform slab of polymer backing material. Parameters for the model (the initial concentration of a VOC in the polymer, a diffusion coefficient and an equilibrium polymer/air partition coefficient) are obtained from exper...

Up-to-date predictive rubber friction models require viscoelastic modulus information; thus, the accurate representation of storage and loss components is fundamental. This study presents two separate empirical formulations for complex moduli materials such as rubber. The majority found in literature are based on tabulated dynamic testing data. A wide range experimentally obtained used this stu...

This study has been initiated to quantify the release of the Polycyclic Aromatic Hydrocarbon (PAH) species from Styrene· Butadiene Copolymer (SBR) during gasification. The identification and quantification has been detennined experimentally using Gas Chromatography/ Mass Spectroscopy (GC/ MS) coupled to a Thenno-Gravimetric Analysis (TGA) unit. SBR samples were pyrolysed in a TGA unit in a Nz a...