Crimson Publishers-Civil Engineering Journal

Assessment of Different Shading Design Scenario on the Daylight Availability Underneath by Mohamed H Elnabawi in Crimson Publishers : Open Journal of Civil Engineering Good daylighting and shading design in urban outdoors not only provides a comfortable luminous environment, but also delivers energy savings and comfortable environments for surroundings, particularly in the hot arid climate. Yet, it can lead to a reduction in the daylight availability leading to visual discomfort. According to the Illuminating Engineering Society of North America (IESNA, 2000, 2011), it is essential that daylight effects be considered in any space where daylight is admitted, even if it is not exploited as a light source, in order to reduce the need for artificial lighting. Therefore, an analysis of solar access and shading is necessary for to assure visual comfort underneath the shading tents. This paper attempts to investigate seven different shading scenarios addressing the solar radiation access...

The Conversion of Magnesium Carbonates into Plaster-Like Products: A Preliminary Study of the Hardening Mechanism by Ammar Elhoweris in Crimson Publishers : Open Journal of Civil Engineering Magnesium carbonate trihydrate, nesquehonite, is proposed as a precursor for the production of a construction material similar to plasterboard, in a unique carbon capture and utilisation process [1]. The hardening process is thought to follow a similar mechanism to gypsum in the manufacture of plasterboard, where the hardening is produced in the recrystallization of gypsum crystals. However, nesquehonite [2], during hardening, converts into hydromagnesite, releasing CO2 and H2O during the transformation. In this work, samples of nesquehonite were hardened by forcing their conversion into hydromagnesite in enclosed cubes [3]. The influence of the curing temperature (50 ℃-80 ℃) and time (0-72 hours) on the compressive strength has been studied and correlated to the conversion of nesquehonite ...