Iris Publishers Civil Engineering Open Access Journals

 Iris Publishers - Journal of Civil and Structural Engineering The Emerging Need for Civil Engineering Design to Embrace a New Systems Approach to the Solution of Complex Problems in Rapidly Changing Technical and Political Landscapes Abstract Traditional solutions to engineering problems have utilized long standing methods developed using deterministic algorithms to arrive at optimal solutions to problems which are relatively easily defined. In a modern, rapidly changing technical and political landscape, these traditional methods do not react rapidly enough to emerging outcomes dependent on interactions between multiple variable systems. The author considers the efficacy of traditional approaches when applied to solving modern complex problems and suggests that there is much our industry could gain by adopting the types of techniques being developed in other fields of expertise. Introduction Picture a scene of a wandering explorer hiking through a mountainous unexplored landscape...

   Iris Publishers - Open Access Journal of Civil and Structural Engineering Comparative Analysis of Engineering Properties of Indus River Sand Concrete with Quarry Dust Concrete, District Jamshoro Sindh Pakistan Abstract This study shows the comparative analysis engineering, the physical and mechanical properties of river sand concrete with quarry dust concrete. The selected materials were batched by weight and volume. The water-cement ratio was opted as 0.50 1:2:4 for mix ratio was selected for the experimental investigation, respectively. The specimens were cured for 7, 14, 21 and 28 days. For the purpose Slump, density and compressive strength tests were carried out. The river sand concrete showed better results and greater density and compressive strength than quarry dust concrete for all curing ages. The 28 days of curing, river sand concrete rise the required compressive strength by 36%, whereas quarry dust concrete was less than the limit compressive strength by 12%. B...

   Iris Publishers - Scholarly Open Access Journal of Civil and Structural Engineering Causes of Construction Delays in Different Buildings Typology in Portugal Abstract The construction represents the sector with the higher impact in the world economy, representing 13.4 %. This sector, crucial to the socioeconomic stability of a country, has been several affected due to the successive construction delays in the design as well as execution phases. Additionally, in comparison with other sectors, the construction industries present lower receptivity in the development of new methodologies and technologies to increase the competitiveness as well as workers incomes and profits increasing the attention from the industry and academia. This study focusing the identification of the constructions processes, which leaves to their delays. Thus, three different buildings typology use were studied (in a real ambient), to identify the delays by groups, type and category to achieve a deep un...