Construction and Building Materials articles from April 2008

Construction and Building Materials archives from April 2008

Development of innovative coating technology for pipeline operation crossing the permafrost terrain.
April 1, 2008... Abstract The increasing energy development activities in the Arctic area impose serious challenges for maintenance of integrity of the oil/gas transmission pipelines. The optimization of selecting and evaluating coatings for feasible use...

Weathering of roofing materials--an overview.
April 1, 2008... Abstract An overview of several aspects of the weathering of roofing materials is presented. Degradation of materials initiated by ultraviolet radiation is discussed for plastics used in roofing, as well as wood and asphalt. Elevated...

Venetian churches of Lefkada, Greece Construction documentation and seismic behaviour "Virgin Mary of the Strangers".
April 1, 2008... Abstract Lefkada suffers from frequent and strong earthquakes. On August 14, 2003, an earthquake with a magnitude of 6.2 on the Richter scale, one of the strongest ever to occur in the Greek territory, resulted in serious damages of 40...

Strengthening of reinforced concrete slabs with mechanically-anchored unbonded FRP system.
April 1, 2008... Abstract The potential use of mechanically-anchored unbonded fibre reinforced polymer (MA-UFRP) system to upgrade reinforced concrete (RC) slabs deficient in flexural strength is examined in this paper. A total of six RC slabs, each...

The effect of silica fume and high-volume Class C fly ash on mechanical properties, chloride penetration and freeze--thaw resistance of self-compacting concrete.
April 1, 2008... Abstract In this study, cement has been replaced with a Class C fly ash (FA) in various proportions from 30% to 60%. Durability properties of various self-compacting concrete (SCC) mixtures such as, freezing and thawing, and chloride...

Experimental evaluation of shear and compression strength of masonry wall before and after reinforcement: deep repointing.
April 1, 2008... Abstract Masonry presents some inadequacies due to its almost total lack of tensile strength. Typical damage to multiple leaf walls during earthquakes is the loss of bond between the leaves with consequent collapse of the external leaf....

Production of lightweight concrete using incinerator bottom ash.
April 1, 2008... Abstract The medium size fraction (14-40 mm) of aged incinerator bottom ash (IBA) obtained from a major UK energy from waste (EfW) plant has been crushed to less than 5 mm (CIBA) and thermally treated at 600 [degrees]C (TCIBA6), 700...

Effect of polyester resin additive on the properties of asphalt binders and mixtures.
April 1, 2008... Abstract The properties of AC-5 control asphalt binder, mixture containing the same asphalt were compared with the properties of AC-10 asphalt binder modified by 0.75%, 1%, 2%, and 3% of polyester resin (PR), mixture containing pure AC-10...

Evaluation of the mechanical properties of Douglas-fir and Japanese cedar lumber and its structural glulam by nondestructive techniques.
April 1, 2008... Abstract The objectives of this study were to investigate the effects of the configuration of the lamina on the bending properties of glulam made from Douglas-fir and Japanese cedar lumber. By using a visual grading method according to CNS...

Environmental influence on point anodes performance in reinforced concrete.
April 1, 2008... Abstract This work reports the most recent laboratory results from zinc-based point anodes performance in two different humidity environments (constant ~95% and at outdoors with ~77% relative humidities) in reinforced concrete small beams...

High temperature resistance of normal strength and autoclaved high strength mortars incorporated polypropylene and steel fibers.
April 1, 2008... Abstract The effects of high temperatures up to 900[degrees]C on normal strength, water cured and autoclave cured high strength mortars were investigated within the scope of this study. Mechanical properties such as, compressive strength,...

Impacts of impregnation solutions on the adhesion strength of outer usage varnish coatings.
April 1, 2008... Abstract This study was carried out to determine the effects of Protim WR-230 and imersol aqua impregnation materials on the adhesion strength for synthetic, yatex and hickson decor varnishes in the Scots pine (Pinus sylvestris L.),...

The influence of compound additive on magnesium oxychloride cement/urban refuse floor tile.
April 1, 2008... Abstract The magnesium oxychloride cement floor tile was produced by using magnesium oxychloride cement and urban refuse. In order to improve the physical performances of the magnesium oxychloride cement floor tile, phosphate, stearic...

Moisture behaviour of slab-on-ground structures in operating conditions: Steady-state analysis.
April 1, 2008... Abstract This paper examines the moisture behaviour of slab-on-ground structures in moist steady-state conditions where the capillary phenomenon is excluded and water vapour diffusion is the only process involved. The focus is particularly...

Prediction of rubberized concrete properties using artificial neural network and fuzzy logic.
April 1, 2008... Abstract In this study, waste automobile tyres in two different sizes were used in production of rubberized fresh concretes. Their unit weight and flow table values were determined experimentally. The values determined were also found when...

Impacts of impregnation with boron compounds on the bonding strength of wood materials.
April 1, 2008... Abstract The objective of this research was to evaluate bonding strength of poly(vinyl acetate) (PVAc), polyurethane based Desmodur-VTKA (D-VTKA), phenol--formaldehyde (PF) and melamine-formaldehyde (MF) adhesives to impregnated wood...

Analysis of chloride diffusion in concrete structures for prediction of initiation time of corrosion using a new meshless approach.
April 1, 2008... Abstract In this paper, a finite point method (FPM) is developed and adopted for solving the chloride diffusion equation for prediction of service life of concrete structures and initiation time of corrosion of reinforcements. Diffusion of...

Relative temperature changes within concrete made with recycled glass aggregate.
April 1, 2008... Abstract The focus of much of the published literature on the use of glass in concrete has been on its use as a cement replacement material. Recent studies have shown that recycled glass can be used as an aggregate without compromising...

Leaching results of reactive materials.
April 1, 2008... Abstract Leaching results are used in the assessment of slag for use in construction. The stability of the major phase in iron- and steelmaking slags has a direct influence on the leaching of all elements enclosed in the matrix....

Thermal conductivity of cement composites containing rubber waste particles: experimental study and modelling.
April 1, 2008... Abstract In this paper an investigation of the thermal conductivity of a lightweight construction material containing rubber waste particles, is presented. Measurements were carried out in a dry state using a transient plane source (TPS)...

Flexural behaviour of pre-cast concrete sandwich composite panel--experimental and theoretical investigations.
April 1, 2008... Abstract The structural behaviour of precast concrete sandwich panels (PCSP) under flexure is studied both experimentally and theoretically. The details and results of the test program are described, and the observed behaviour patterns are...

Change in microstructure of hardened cement paste subjected to elevated temperatures.
April 1, 2008... Abstract To achieve both qualitative and quantitative understanding of the change in microstructure of hardened cement paste (hcp) due to elevated temperatures, X-ray diffraction, mercury intrusion porosimetry tests, and scanning electron...

Numerical modelling of the behaviour of consolidated porous media exposed to frost action.
April 1, 2008... Abstract This paper summarizes the physical basis of a hydro-mechanical model whose components are the mass conservation equations of the solid matrix, water and ice. The constitutive laws of these three phases, used with Biot's model and...

Corrosion inhibitors for steel in concrete: state-of-the-art report.
April 1, 2008... Abstract This state-of-the-art report is focused on corrosion inhibitors used in concrete and is based on published studies in the last decade. Emphasis was given to the most commonly used inhibitors such as aminoalcohols (AMAs), calcium...

The effect of aggregate absorption on pore area at interfacial zone of lightweight concrete.
April 1, 2008... Abstract An experimental program was carried out to study the effect of water absorption of lightweight aggregate on the pore size distribution at the interfacial zone of lightweight aggregate concrete. Properties of lightweight expanded...

Flame spread over plastic materials in flashover room fires.
April 1, 2008... Abstract Flame spread over the surface of plastic samples under a flashover room fire will be discussed in this paper. Two plastic samples on polyvinyl chloride and polycarbonate were selected and tested. These materials are commonly used...

Material characteristics of high performance lightweight concrete reinforced with PVA.
April 1, 2008... Abstract This paper is focused on mix design of PVA (polyvinyl alcohol) fiber reinforced lightweight concrete (FRLWC). By designing mix compositions, a high performance composite can be produced with a small amount of short fibers. In this...

A comparative study on the performance of sands rich and poor in fines in self-compacting concrete.
April 1, 2008... Abstract Self-compacting concrete (SCC) as a special concrete, has practical advantages due to its mechanical performance and application easiness. However, a more careful study is needed at the stage of mixture proportioning. In order to...

Experimental application of mineral admixtures in lightweight concrete with high strength and workability.
April 1, 2008... Abstract The effects of mineral admixtures including fly ash (FA), blast furnace slag (BS) and silica fume (SF) on workable high strength lightweight concrete were investigated. The results showed that both BS and SF can effectively...

Optimization of self-compacting filling grout mixtures for repair purposes.
April 1, 2008... Abstract Today self-compacting filling grouts (SCFG) are preferred for rapid repair purposes due to the application easiness, in addition to physical and mechanical advantages. However for self-compactability, the paste phase must meet...

Evaluation of mechanical, physical and thermal performance of cement-based tiles reinforced with vegetable fibers.
April 1, 2008... Abstract The objective of this work was to analyze mechanical, physical and thermal performance of roofing tiles produced with several formulations of cement-based matrices reinforced with sisal and eucalyptus fibers. The physical...

Classification of time-dependent unconfined strength of fly ash treated clay.
April 1, 2008... Abstract The mixing of fly ash with clay or clayey soil has a positive effect on the mechanical behavior of the soil due to its free lime content and pore refinement characteristic. The increase in soil strength may partially be attributed...

Experimental behavior of circular concrete columns under reversed cyclic loading.
April 1, 2008... Abstract This paper experimentally investigates the cyclic behavior of reinforced concrete circular columns confined using a new confinement technique. The new confinement technique uses two opposing spirals (cross spirals) to confine...

Compaction characteristics and corrosivity of Indiana class-F fly and bottom ash mixtures.
April 1, 2008... Abstract Fly ash and bottom ash are the residual by-products of coal burning to produce electricity. They are typically treated as a waste, disposed together in ponds. Reutilization of these waste materials in civil engineering...

Characteristics of lightweight aggregates from primary and recycled raw materials.(Technical Note)
April 1, 2008... Abstract In the following, a brief survey of mineral lightweight granules manufactured on the basis of a wide variety of constituents is given. After that, research projects conducted at the Tomsk Polytechnic University (Russian...

Calendar.(Calendar)
April 1, 2008... Calendar Event Date and venue 2008 DFE2008: International 24-26 April Conference on Design, University of Fabrication and Economy Miskolc, Hungary of Welded Structures ...