Block copolymer (BCP) self-assembly has been one of attractive approach for highly size-selective and permeable membranes due to its narrow size distribution and high pore density. We produced a thermally annealed PS-b-PMMA film on a neutral substrate, where the randomly oriented PMMA cylinders were formed between two layers of perpendicular PMMA cylinders at both substrate/polymer and polymer/air interfaces. The PMMA cylinders in the BCP films processed with a selective solvent were swollen for tunable mesoporous UF membrane. The confined swelling of PMMA microdomains in PS matrix resulted in the compaction of PS matrix as well as the shrinkage of PMMA microdomains during the removal of a PMMA-selective solvent.

The fiber reinforced polymer (FRP) strengthening is significantly effective for enhancing the performances of concrete to the high strain rate loadings. However, the FRP retrofitted concrete members show different behaviors comparing to quasi-static cases. This study presents experimental observation on behaviors of meso-scale concrete members retrofitted with FRP sheets under low-velocity drop-weight impact loadings. Concrete specimens with the dimensions of 100×100×400 mm were fabricated and various FRP sheets were attached. The specimens with a reinforced bottom surface and the doubly reinforced specimens showed much higher energy absorptions. Also, reinforced concrete (RC) members were cast and reinforced with CFRP sheets. The FRP flexural and shear strengthening RC beams has weakness in the spalling failure because the impact load concentrated the concrete face which is not strengthened with FRP sheets.

This paper investigates the effect of nanomaterials on the piezoresistive sensing capacity of cement-based composites. Carbon nanotube, graphite nanofiber filament, carbon fiber were considered along with a cement composite which is included slicafume. After deriving optimum flowability, cement composites contained carbon materials were made respectively. Then, cyclic compressive test was performed with cement composite that contained 5% of each nano material.