Since the rubber units are mostly standardized in the industry, the real engineering and, design challenge is with the steel panels, chains and the corresponding anchorage. The rubber unit is a crucial component of the system, but is only as good as the overall design of the system. SFT has inspected numerous systems of even reputable fender manufacturer, that showed signs of premature failures...

Flowable fill is a self-leveling and self-compacting material that is rapidly gaining acceptance and application in construction, particularly in transportation and utility earthworks. When mixed with concrete sand, standard flowable fill produces a mass density ranging from 1.8 to 2.3 g/cm(3) (115-145 pcf). Scrap tires can be granulated to produce crumb rubber, which has a granular texture and...

In this study, we show the proof of concept for the production of defined oligo-isoprenoids with terminal functional groups that can be used as starting materials for various purposes including the synthesis of isoprenoid-based plastics. To this end, we used three types of rubber oxygenases for the enzymatic cleavage of rubber [poly(cis-1,4-isoprene)]. Two enzymes, rubber oxygenase RoxAXsp and ...

Mixture model is a probabilistic model that denotes the presence of subpopulations within an overall population meanwhile finite mixture model is a mixture model with finite-dimensional. In this paper, finite mixture model is applied and the application of Bayesian method to fit finite mixture model is popular and these application is adopt in the present study in order to explore the relations...

Introduction.-It has been shown earlierl 2 that the synthesis of the isoprenoid, rubber, by a rubber-bearing plant, guayule (Parthenium argentatum), involves acetate as an, intermediate. Not only does the administration of acetate to this plant result in a net increase in the amount of rubber formed, but, in addition, rubber synthesized by plants supplied with doubly C"4-labeled acetate possess...

one of the most important factors that affect tire friction is surface roughness, which determines the size of the real contact area, real pressure distribution on the contact interface, and scales of mechanical engagement between viscoelastic rubber and a rough substrate. the need to predict coefficient of friction (cof) for rubber on rough surfaces for applications such as traction of tires o...

Carbon, silica etc are added to natural rubber as filler to improve the mechanical properties. In the present study, a natural filler lignin was incorporated into natural rubber which was coagulated by microorganism rather than conventional method of using acid and was tested for their mechanical and wear behavior. The advantages of natural fillers are their low density, renewable character and...

An investigation was conducted to determine the influence of recycled scrap tire rubber on the engineering properties of controlled low strength material (CLSM). With control over the ultimate compressive strength of CLSMs being key for applications such as backfilling utility trenches where re-excavation is often necessary, incorporation of scrap tire rubber into the CLSM mixture is a viable w...

usual MET-EL-S rubber stopper (3.97 and 3.99 mg/litre), as compared to bottles capped with Parafilm (2.32 and 2.26 mg/litre). For the nitric acid wash of the MET-EL-S rubber stopper, a zinc value exceeding 30 mg/litre was found. The contents of a bottle of the MET-EL-S quality-control serum was mixed and left inverted on the rubber stopper for five days, when the zinc value was found to be 6.80...

Child running and jumping sound are one of the major noise sources in heavy structured apartment building. It was reported that physical characteristics of rubber ball (heavy/soft impact sound) was similar with child's running and jumping. As a standard impact source, rubber ball was standardized in ISO 10140 series and ISO 16283-2. However, evaluation method of rubber ball was not proposed in ...