Several studies have highlighted the potential of crushed brick aggregates in non-structural concrete. This is because offer substandard mechanical properties comparison to natural stone aggregates. Synthetic Fiber Reinforced Polymer (FRP) sheets been known overcome this issue. However, enormous costs associated with synthetic FRPs may limit their use several low-budget applications. study reco...

A comprehensive investigation is conducted on the archeological sediments from Early Pleistocene site of El Kherba (Algeria), involving sediment and soil micromorphology analyses. yielded Oldowan stone tools associated with animal fossils three levels. The studies aim at assessing sedimentary processes that acted in burial remains identifying microfacies order to gain high-resolution paleoenvir...

19 Clay-polymer composites were designed for use in filtration processes for disinfection 20 during the course of water purification. The composites were formed by sorption of 21 polymers based on starch modified with quaternary ammonium ethers onto the 22 negatively charged clay mineral bentonite. The performance of the clay-polymer 23 complexes in removal of bacteria was strongly dependent on...

We analyze a well known type of puzzle in planar geometry: given a planar shape, it is required to find a cut that divides the shape into two identical parts (up to rotation and translation). Clearly not all shapes can be so dissected and for some shapes that appear in puzzles the cutting curve is quite surprising and difficult to find. In this paper we first analyze the inverse problem of asse...

SUPERCRITICAL CARBON DIOXIDE PROCESSING OF NANO CLAYS ANDPOLYMER/CLAY NANOCOMPOSITESbyMIHAI MANITIUAugust 2010Advisor: Rangaramanujam KannanCo-Advisor: Esin GulariMajor: Chemical EngineeringDegree: Doctor of Philosophy Effective dispersion of the fillers in a polymer matrix and improvement of polymer clayinteractions are two key challenges in the field of...

-Clay-modified electrode research indicates that adsorbed complexes are electroactive if the adsorption sites are clay edges. Interlayer adsorbed complexes may be electroactive ifa charge shuttle is added or if interlayer swelling is large. Conductivity of the film towards anionic species depends upon the swelling of the clay, which depends on the electrolyte concentration and speciation. The d...

Preparation of a novel organically modified clay from spent oil base drilling mud (SOBM) that could serve as core-shell clay filler for polymers is herein reported. Due to the hydrophilic nature of clay, its compatibility with polymer matrix was made possible through modification of the surface of the core clay sample with 3-aminopropyltriethoxysilane (3-APTES) compound prior to its use. Fourie...

The segmental dynamics of rigid, intermediate, and mobile molecular components in carboxyl terminated polybutadiene (CTPB)/ organo−clay (C18−clay) systems was characterized by fully refocused H NMR FID. In addition, H DQ NMR experiments allowed semiquantitative monitoring of changes in segmental dynamics near the interface. Both methods suggest a critical concentration of 60 wt % CTPB, indicati...

Predicting soil phosphorus (P) needs and P fertilizer requirements is important for plant nutrition and reducing environmental risk. The P requirement (PR) can be calculated from three components: the current status of soil P (P0), soil P buffer coefficient (PBC), and the soil P critical level (PCL). The PBC and PCL can be predicted from soil clay content using linear-plateau models. The PR, PB...

Mudboils are round to elongate, 1-3 m diameter bare soil patches that form on perennially frozen till. marine clayey silt, colluvium. or other poorly sorted sediments (muds) with significant silt and (or) clay content. In Keewatin these muds have low liquid limirs (<ZM) and limited plasticity indices (<It)%). Natural moisture contents are very near the liquid limit .w thal rhe muds liquefv and ...