Recently added articles from Construction and Building Materials:
Valorization of galvanic sludge in sulfoaluminate cement.(Formula)
Feb 01, 2009; ... ABSTRACT Every year increasing amounts of industrial waste are generated worldwide. Depending on their characteristics, wastes can represent an important source of secondary raw materials in order to replace natural resources. In this study, galvanic sludge (LDG) was used as raw ...
Influence of natural coarse aggregate size, mineralogy and water content on the permeability of structural concrete.
Feb 01, 2009; ... ABSTRACT This experimental work discusses the relevance of natural coarse aggregates of different geological sources in the permeability of structural concrete. Good quality granite, basalt, calcareous and marble natural coarse aggregates, obtained from different quarries, were ...
Influence of coal bottom ash as fine aggregate on fresh properties of concrete.
Feb 01, 2009; ... ABSTRACT This paper investigates the influence of the use of coal bottom ash as a replacement for natural fine aggregates on the properties of concrete in the fresh state. Tests for water loss through bleeding, and the determination of the setting rimes and plastic shrinkage, ...
Experimental and numerical analysis of a halved and tabled traditional timber scarf joint.
Feb 01, 2009; ... Abstract Traditionally constructed heavy timber trusses, found in timber framed buildings and bridges, employ various traditional joints, among them the lower chord scarf joint. This paper examines the behavior of a halved and tabled scarf joint, which was studied as an isolated ...
Strength and durability of concrete incorporating crushed limestone sand.
Feb 01, 2009; ... Abstract In recent years, there is a growing interest in the use of crushed sand obtained from limestone quarries in some countries where river sand is not widely available. The fines content is usually high in crushed sand which can adversely affect concrete properties. The ...
Impacts of impregnation chemicals on combustion properties of the laminated wood materials produced combination of beech and poplar veneers.
Feb 01, 2009; ... Abstract The aim of this study was to investigate the effects of impregnation with boron compounds Borax ([B.sub.x]), Boric acid ([B.sub.A]), [B.sub.x] + [B.sub.A], Imersol-Aqua ([I.sub.AQUA]) and Timbercare-Aqua ([T.sub.AQUA]) on combustion properties of the laminated wood ...
The effect of Persian Gulf tidal zone exposure on durability of mixes containing silica fume and blast furnace slag.
Feb 01, 2009; ... Abstract In this research the performance of cement paste and concrete mixes incorporating 7% and 10% of silica fume (SF) as a cement replacement was investigated in three exposure conditions. The results showed that plain type 11 portland cement performed better than blended SF ...
Ceramic tiling inspection system.
Feb 01, 2009; ... Abstract This paper presents a proposal of an expert system for inspection and diagnosis of defects in adhesive ceramic wall or floor tiling (ACT), specifically developed for recent buildings. The system proposed includes a classification of the ACT defects and their most ...
Metakaolin in the formulation of UHPC.(Ultra High Performance Concrete)
Feb 01, 2009; ... ABSTRACT Silica fumes have characteristics that make them exceptional in cement matrices and, in particular, in UHPC. Nevertheless, they have important disadvantages: lack of availability, cost and color. The search for substitute products thus appears important if the use of ...
Effect of moisture transfer on specific heat of gypsum plasterboard at high temperatures.
Feb 01, 2009; ... ABSTRACT This paper describes a combined numerical analysis of heat and mass transfer in gypsum plasterboard when exposed to fire. The outputs of this analysis include temperature, moisture content and pressure distributions in gypsum plasterboard. Validation of the analysis is ...
Preparation of load-bearing building materials from autoclaved phosphogypsum.
Feb 01, 2009; ... Abstract Previous studies have been carried out on calcined phosphogypsum (PG) for making the building materials. The present study was focused on autoclaved PG and its use in making load-bearing wall bricks. Autoclaved PG was prepared from original waste PG with steam ...
Investigating mix proportions of high strength self compacting concrete by using Taguchi method.
Feb 01, 2009; ... ABSTRACT In this study, mix proportion parameters of high strength self compacting concrete (HSSCC) are analyzed by using the Taguchi's experiment design methodology for optimal design. For that purpose, mixtures are designed in a [L.sub.18] orthogonal array with six factors, ...
Production of low cost self compacting concrete using bagasse ash.
Feb 01, 2009; ... Abstract Self compacting concrete (SCC) is a development of conventional concrete, in which the use of vibrator for compaction is no more required. This property of self compacting concrete has made its use more attractive all over the world. But its initial higher supply cost ...
Long-term damage of historic masonry: a probabilistic model.
Feb 01, 2009; ... Abstract Creep and the creep-fatigue interaction have shown to strongly influence the mechanical behaviour of ancient masonry and long-term heavy loads proved to cause a continuous damage. The problem of achieving a reliable life-time estimate of historic masonry toward the ...
A model for predicting the carbonation depth of concrete containing low-calcium fly ash.
Feb 01, 2009; ... ABSTRACT Low-calcium fly ash (FL) is a general product from the combustion of anthracite and bituminous coals and has been widely used as a mineral admixture to produce high strength and high performance concrete. Carbonation of cement blended with fly ash is much more complex ...
Petrographic identification of alkali-silica reactive aggregates in concrete from 20th century bridges.
Feb 01, 2009; ... ABSTRACT Cracks and white coatings have been observed in a number of concrete bridges constructed during the 20th century. The observed damage phenomena have been attributed to the alkali--silica reaction (ASR) after following detailed macroscopic examination. Several ...
Utilization of weathered basic oxygen furnace slag in the production of hydraulic road binders.
Feb 01, 2009; ... ABSTRACT This paper deals with the use of a weathered basic oxygen furnace (BOF) slag as a main constituent in hydraulic road hinder. The original idea of this study was to associate the BOF slag with ground granulated blast furnace slag (GGBFS). The free lime contained in BOF ...
Aerospace technology for strengthening of bridges.
Feb 01, 2009; ... ABSTRACT A fiber-reinforced polymer (FRP) composite jacket was applied to the reinforced concrete pier caps of the Silver Spring Cove Bridge in Rhode Island. Since this highway overpass bordered a nearby marina, the corrosive environment of the Atlantic Ocean played a major role ...
Effects of environmental factors on the adhesion and durability characteristics of epoxy-bonded concrete prisms.
Feb 01, 2009; ... ABSTRACT This work is concerned with the effects of environmental factors on the adhesion and durability characteristics of epoxy-bonded concrete prisms. The results indicate that the presence of liquid water at the interracial zone during the epoxy injection process disrupts ...
Corrosion of steel rebar embedded in natural pozzolan based mortars exposed to chlorides.
Feb 01, 2009; ... ABSTRACT Corrosion of steel is considered the most important durability problem of reinforced concrete. The application of supplementary cementitious materials has been proposed in order to mitigate this durability problem, reduce the production costs and control the emission ...