Construction and Building Materials articles from February 2007

Construction and Building Materials archives from February 2007

The selection of soils for unstabilised earth building: a normative review.
February 1, 2007... Abstract Earth building techniques make use of unbaked earth as a material for constructing walls. We consider that evaluation of soils is a primary question because not all soils are adequate for earth building, and not for any of the...

Cement-clay grouts modified with acrylic resin or methyl methacrylate ester: physical and mechanical properties.
February 1, 2007... Abstract Grouting is a common technical method with many applications, e.g. it is used for soil stabilization and strengthening, for reduction of water ingress to underground facilities or of the water loss through a dam foundation, etc....

New quality regulation system for manufacture of ceramic products.
February 1, 2007... Abstract In the paper these chemical, physical mechanical and structural parameters of ceramic samples are determined experimentally: chemical clay composition, density, compressive strength, general contraction, reserve of pore volume,...

Effects of tensile reinforcement ratio and compressive strength on the behaviour of over-reinforced helically confined HSC beams.
February 1, 2007... Abstract The technology of high strength concrete has improved over the last decade. High strength concrete (HSC) is more brittle than normal strength concrete. The brittleness increases with the use of over-reinforced section, which fails...

Development of coconut coir-based lightweight cement board.
February 1, 2007... Abstract This paper presents investigation conducted in Thailand on the development of coconut coir-based lightweight cement boards (CCB). These boards were made from coconut coir, cement and water. They are intended to be used as building...

Behaviour of ventilated double layer external wall briquettes under earthquake loading.
February 1, 2007... Abstract Ventilated double layer briquette is used as external walls in the construction of classical as well as modern buildings that are built in regions having climates with high temperatures or rainy and windy seasons. In this...

Strengthening of steel-concrete composite girders using carbon fiber reinforced polymer plates.
February 1, 2007... Abstract Strengthening and rehabilitation of structures is a major concern for researchers in the civil engineering community in recent years due to the aging of these structures and the need for effective methods of strengthening. This...

Compressive strength testing of compressed earth blocks.
February 1, 2007... As with other masonry units, compressive strength is a basic measure of quality for compressed earth blocks. However, as compressed earth blocks are produced in a great variety of sizes the influence of block geometry on measured strength,...

Laboratory tests of an anisotropic-grid timber bridge.
February 1, 2007... Abstract Research and development was conducted on a prototype timber bridge technology developed for rural bridge sites. The work included conception, computer modeling, laboratory load tests of a reduced size specimen, field construction...

Soil treatment using fresh and landfilled cement kiln dust.
February 1, 2007... Abstract A laboratory study was undertaken to evaluate two fresh and one landfilled cement kiln dusts (CKDs) for soil treatment. Only one fresh CKD (with free lime in 2-5% range) was found to be sufficiently reactive and showed potential...

Investigation of rutting performance of asphalt mixtures containing polymer modifiers.
February 1, 2007... Abstract The purpose of this study is to evaluate mechanical properties of control and modified asphalt mixtures. Conventional and five modified asphalt mixtures were studied on hot mix asphalt permanent deformation resistance. Amorphous...

Representation of real particles for DEM simulation using X-ray tomography.
February 1, 2007... Abstract A flexible pavement structure consists of mainly bonded or unbonded granular materials. In the simulation of the behavior of these pavement materials, Discrete Element Method (DEM) treats the two materials similarly with...

Composite tubes as an alternative to steel spirals for concrete members in bending and shear.
February 1, 2007... Abstract Glass fibre-reinforced polymer (GFRP) tubes are compared to steel spiral reinforcement in circular concrete members with longitudinal reinforcement and prestressing, using six beam tests. Two 324 mm diameter and 4.2 m long...

Influence of fly ash fineness on the chloride penetration of concrete.
February 1, 2007... Abstract In this paper, the resistance to chloride penetration of concrete containing fly ash of various finenesses was examined. Three different fly ash finenesses viz., original fly ash, 45% fine portion and 10% fine portion fly ashes...

Evaluation of the durability of mortar and concrete applied with inorganic coating material and surface treatment system.
February 1, 2007... Abstract Various surface coatings are used to prevent the degradation of durability of concrete structures. Most of them are constituted of organic coatings using volatile organic compound. However, such organic coatings have the decisive...

Influence of diffusion coefficient on chloride ion penetration of concrete structure.
February 1, 2007... Abstract This paper proposes a modified diffusion coefficient that considers the effect of chloride binding and evaporable water on the diffusion coefficient. A finite element method (FEM) program based on the modified diffusion...

Properties of polymer-modified mortars using epoxy and acrylic emulsions.
February 1, 2007... Abstract Water based polymer systems are often used for improvement in the properties of plain cement mortar or concrete. Presently, latexes of a single or combinations of polymers like polyvinyl acetate, copolymers of vinyl acetate-...

Appraisal of long-term effects of fly ash and silica fume on compressive strength of concrete by neural networks.
February 1, 2007... Abstract This study focuses on studying the effects of fly ash and silica fume replacement content on the strength of concrete cured for a long-term period of time by neural networks (NNs). Applicability of NNs to evaluate the effects of...

Bond behaviour between recycled aggregate concrete and steel rebars.
February 1, 2007... Abstract Thirty six pullout tests were carried out in order to investigate the bond behaviour between recycled aggregate concrete (RAC) and steel rebars. Three recycled coarse aggregate (RCA) replacement percentages (i.e., 0%, 50% and...

A way for preventing tension delamination of concrete cover in midspan of FRP strengthened beams.
February 1, 2007... Abstract In order to prevent tension delamination of concrete cover in midspan more efficiently, an attempt to strengthen reinforced concrete beams by combining unidirectional carbon fibre reinforced polymer (CFRP) sheet (to bond to the...

Closed form constitutive relationship for concrete filled FRP tubes under compression.
February 1, 2007... Abstract Fiber-reinforced polymer (FRP) tubes filled with concrete are very effective structural elements when loaded under axial stress. The exterior jacket of FRP, in fact, confines the inner concrete and significantly enhances both its...

Effect of alkali-silica reaction and freezing and thawing action on concrete-steel bond.
February 1, 2007... Abstract An experimental program was conducted to investigate the effect of stresses and cracks, caused by alkali-silica reaction (ASR) and freezing and thawing (F/T), on bond between reinforcing steel and concrete. Pullout test cylinders,...

The origin and development of natural cements: the Spanish experience.
February 1, 2007... Abstract Natural cement first appeared in England in 1796. Industrial production did not begin in Spain until the second half of the 19th century. Small scale production of natural cement started in different parts of the north and...

Cracking due to shear in masonry mortar joints and around the interface between masonry walls and reinforced concrete beams.
February 1, 2007... Cracking occurs frequently in building masonry walls, and are usually located in the joints between the units because they represent generally planes of weakness, in some cases due to their low shear resistance. Sometimes cracks can appear in...

Influence of class F fly ash on the abrasion-erosion resistance of high-strength concrete.
February 1, 2007... Abstract This study investigates the abrasion-erosion resistance of high-strength concrete (HSC) mixtures in which cement was partially replaced by four kinds of replacements (15%, 20%, 25% and 30%) of class F fly ash. The mixtures...

Thermal stresses and cracking in absorptive solar glazing.(Technical note)
February 1, 2007... Abstract The emerging popularity of absorptive, as opposed to reflective, solar glazing coatings on windows has generated renewed interest in thermally induced cracking of glass structures. Here we analyse the stresses on glass coated with...

Calendar.(Calendar)
February 1, 2007... Event Date and venue Details from 2007 9th International 16-18 May 2007 E-mail: statkon@konf. Conference on Vilnius, vtu.lt Modern Building ...