This paper summarizes the research findings of the fundamental characteristics of high-strength concrete for the flexural design of bridge girders. The main objective of the research is to provide recommended provisions to the AASHTO-LRFD Bridge Design Specifications to extend the use of concrete strength up to 18 ksi. A total of 15 plain concrete specimens were tested under eccentric compressi...

The aim of current study was to determine the recycled concrete aggregate (RCA) applicability in production mixture for vibropressed blocks. experiments were focused especially on crushed waste material from same elements producing plant. For this type precast only some finer fractions can be implemented and “earth-moist” consistency fresh is required. series samples prepared which natural aggr...

This paper introduces Multi-Stage Fault Attacks, which allow Differential Fault Analysis of block ciphers having independent subkeys. Besides the specification of an algorithm implementing the technique, we show concrete applications to LED-128 and PRINCE and demonstrate that in both cases approximately 3 to 4 fault-injections are enough to reconstruct the full 128-bit key. Keywords-cryptanalys...

This article presents the results of experimental research, which characterizes parameters and properties porous structure aerated concrete based on industrial waste. Structurally optimal representing physical-mechanical, thermal-technical concrete-based exterior wall structures have been identified. The test were carried out in research laboratories using block constructions with an compositio...

S? An impact test was conducted on a 1119 pound 2 foot diameter sphere 05 <f model at the Holloman Sled Track in Alamogordo, New Mexico, This test is part of a study to determine the feasibility of containing the fission products of a mobile reactor in the event of an impact,, The model simulated the reactor core, energy absorbing gamma shielding, neutron shielding and the containment vessel. I...

. The paper presents the results of development and implementation technology self-compacting heavy structural concrete concreting with its use largest foundation slab in Belarus (concrete volume ~9100 m3) a high-rise building at facility “Construction multifunctional complex Minsk within boundaries Filimonova Street – Avenue Nezavisimosty Makayonka Street”. research are shown, which ensured pr...

Abstract New concrete often deteriorates performance, segregation, water secretion, and other phenomena ₒ Concrete workability pumpability are reduced, segregation resistance agents can effectively solve the problem, improve construction performance of fresh concrete. This study shows that acrylamide is 3.40%, AMPS 1.50%, H2O2 0.06%, suspension block 0.2%. The optimum best performing liquid age...

In recent years, the Lamb wave analysis by the multi-channel analysis of surface waves (MASW) for concrete structures has been an effective nondestructive evaluation, such as the condition assessment and dimension identification by the elastic wave velocities and their reflections from boundaries. This study proposes an effective Lamb wave analysis by the practical application of MASW to concre...