Chloride diffusion of alkali-activated fly ash/slag concrete

The widespread application of alkali-activated fly ash/slag (AAFS) concrete requires satisfaction of a series of performance criteria both from its early age properties (e.g. workability, strength) and long-term stability. In this study, long-term (till 180 days) natural chloride diffusion tests were conducted to evaluate the chloride diffusion...

The influence of lightweight functional aggregates on the acidification damage in the external anode mortar during cathodic protection for reinforced concrete

Impressed current cathodic protection (ICCP) is an effective corrosion protection and prevention technique for reinforced concrete structures served in chloride-contaminated environment. The acidification damage in the external anode mortar caused by the anodic reactions significantly influences the efficiency of ICCP for reinforced concrete....

The NASA MATB-II predicts prospective memory performance during complex simulated flight

Prospective memory is essential for flight, where failures can result in incorrect flight control settings, leading to loss of life and equipment. Furthermore, prospective memory is highly-sensitive to pilot age, cognition, and experience. This research reports on the relation of the NASA Multi-Attribute Test Battery-II (MATB-II) to prospective...

Virtual reality flight environments may taxworking memory and disrupt prospective memory

While vivid virtual reality (VR) environments may afford better performance for some flight tasks, it is possible that enhanced stimuli could overload some cognitive resources. Prospective memory (PM) is a cognitive factor sensitive to working memory and visual processing demands, and it may be a performance factor either adversely affected or...

Integration of Land and Housing Information in China: First Analysis of Legal Requirements for LADM Compliance

The integration of land and housing law, processes, and data is a significant issue in China. Prior to the design of any integrated information system, the legal requirements of such a system must first be assessed. To date, this has not been fully studied. In this paper, we identify and review the requirements for the integration of land and...

Computation of Modal Radiation through an Engine Exhaust on Adaptively Refined Meshes

This paper outlines the method of a block-structured adaptive mesh refinement (AMR) and its application to the computation of noise radiation from a realistic engine exhaust geometry with flow. The computational model described allows acoustic waves, propagating inside the bypass duct of a generic aircraft engine, to be admitted into a...

Advances in chloride diffusion of concrete exposed to marine field environment

For elaborating the research significance, goal, content and representative results of the concrete marine field exposure experiments all over the world, we have collected a large number of research literature since 1905. The longest exposure test for concrete has reached 62 years and, most importantly, concrete exposure experiments have made...