hot or cold weather condition affects the quality of the concrete in different ways, which one of them is increase or decrease in the initial temperature of the concrete. in this study, the impact of the initial temperature of the concrete on its quality in concrete kerbs made by dry pressing method with portland cement is examined. concretes with similar mix designs and initial temperatures of...

The objective of this research is to enhance the properties concrete by using Fly Ash as a partial substitution concrete. Tests carried out on cement are Initial and Final setting time aggregates, specific gravity sieve analysis. mean target strength with given compressive at 28 day quality control level calculated. Concrete blend proportions for first tryout mix calculated casting cube 15mm si...

Adding steel braces to reinforced concrete frames is a common way for seismic rehabilitation of these structures. Due to ease of installation and the possibility of creating openings in the braced bays, this method of rehabilitation has been more preferred than using shear walls. In this paper, three experimental specimens including a reinforced concrete frame, a reinforced concrete frame with ...

The problem of determining Herbrand equivalence of terms at each program point in a data flow framework is a central and well studied question in program analysis. Most of the well-known algorithms for the computation of Herbrand equivalence in data flow frameworks [4, 9, 11] proceed via iterative fix-point computation on some abstract lattice of short expressions relevant to the given flow gra...

ao"length of opening dh, dl"distance from top of steel section to centroid of concrete force at high and low moment ends of the opening, respectively dr"distance from outside edge of flange to centroid of reinforcement *b"maximum bending deflection for unperforated beam *m,b"maximum bending deflection for a member with an opening Fy"yield stress of steel FM y"reduced axial strength of steel in ...

ion and explanation A CR approach to the explanation of concrete phenomena such as semiosis analyses them as conjunctions of structures and causal powers co-producing specific effects. To do this it abstracts these structures, identifying them and considering their respective causal powers and liabilities. Having done this, it then moves back towards the concrete, combining the abstracted const...

Recycle Aggregate Concrete (RAC) is a common “green” product used for a variety of purposes, although the durability and strength of the material still need more research to adequately determine influences on these parameters. The failure pattern, punching bearing capacity, and deflection variation of wallboard of both ordinary concrete and RAC with various rebar reinforcement diameters and spa...

Proper selection of material in manufacturing firms is a vital role of designer depending upon the different era of application. The material selection problem is very complex and challenging task today. Erroneous cull of material frequently leads to astronomically immense cost involution, and finally drives towards unfortunate component or product breakdown. Thus, the designer necessitates dis...

Lightweight concrete (LWC) is a kind of concrete that made of lightweight aggregates or gas bubbles. These aggregates could be natural or artificial, and expanded polystyrene (EPS) lightweight concrete is the most interesting lightweight concrete and has good mechanical properties. Bulk density of this kind of concrete is between 300-2000 kg/m3. In this paper flexural strength of EPS is modeled...