Construction and Building Materials articles from July 2008

Construction and Building Materials archives from July 2008

Alkali-activated binders: a review: Part 1. historical background, terminology, reaction mechanisms and hydration products.
July 1, 2008... Abstract The disintegration of concrete structures made of ordinary Portland cement (OPC) is a worrying topic of increasing significance. The development of new binders with longer durability is therefore needed. Alkali-activated binders...

Alkali-activated binders: a review. Part 2. About materials and binders manufacture.
July 1, 2008... Abstract This paper summarizes current knowledge about alkali-activated binders, by reviewing previously published work. As it is shown in Part 1, alkali-activated binders have emerged as an alternative to (ordinary Portland cement) OPC...

Laboratory evaluation of fatigue characteristics of recycled asphalt mixture.
July 1, 2008... Abstract This paper presents the results of a laboratory study of evaluating the fatigue characteristics of hot-mix asphalt (H MA) mixtures using different testing methods. In this study, the fatigue performance of HMA mixtures was...

The effect of curing temperature on sulphate-resistant cement hydration and strength.
July 1, 2008... Abstract This paper describes the behaviour of sulphate resistant cement paste hydrated at temperatures ranging from 4 to 85[degrees]C. A number of techniques and methods were used to study hydration: compressive strength,...

Color identification of some Turkish marbles.(Brief article)
July 1, 2008... Abstract Colors of marbles can be found in wide variety in nature. Since, marbles are used as decorative covering stone, their appearance is very important. Value of marbles in construction markets are changing according to their colors...

Model for the mechanical stress due to the salt crystallization in porous materials.
July 1, 2008... Abstract This paper deals with the experimental investigation and the mathematical modelling of crystal growth in porous materials and resulting mechanical stress due to the crystallization pressure. Crystallization of potassium...

The effect of crumb rubber modifier (CRM) on the performance properties of rubberized binders in HMA pavements.
July 1, 2008... Abstract The application of crumb rubber modifier (CRM) in asphalt mixtures is intended to improve tile properties of binder by reducing the binder's inherent temperature susceptibility. During the interaction with asphalt binder, the CRM...

Offshore sand for reinforced concrete.
July 1, 2008... Abstract A figure of 0.075% by weight of sand was arrived at as a safe limit for allowable [Cl.sup.-] ion content in offshore sand for OPC based reinforced concrete. A 2 m high sand column was fabricated for checking the effects of natural...

Prediction of lower and upper bounds of elastic modulus of high strength concrete.
July 1, 2008... Abstract Modulus of elasticity is particularly important in the analysis and design of reinforced concrete structures. Several predictive formulas are recommended in different codes to find out elastic modulus of high strength concrete...

Evaluation of strength at early ages of self-compacting concrete with high volume fly ash.
July 1, 2008... Abstract Self-compacting concrete (SCC) demands large amount of powder content and fines for its cohesiveness and ability to flow with out bleeding and segregation. In the present investigation, part of this powder is replaced with high...

Impacts of impregnation with Imersol-Aqua on the compression strength of some solid wood materials.
July 1, 2008... Abstract The aim of this study was to investigate the effects of impregnation with Imersol-Aqua on the compression strength of some solid wood materials. For this aim, Oriental beech (Fagus orientalis Lipsky), European oak (Quercus petrea...

An experimental study on delamination of FRP plates bonded to concrete.
July 1, 2008... Abstract Results of an experimental campaign on FRP--concrete delamination are presented. Specimens with different bonded lengths and plate widths have been tested. Strain gauges along the FRP plate have been used to measure longitudinal...

Properties of masonry blocks produced with waste limestone sawdust and glass powder.
July 1, 2008... Abstract Large amounts of waste accumulate in every year in all countries which have been running limestone quarries. Tile majority of waste limestone sawdust (WLS) or dust is abandoned, and causes certain serious problems such as...

Prediction of elastic modulus of normal and high strength concrete by artificial neural networks.
July 1, 2008... Abstract In the present paper, application of artificial neural networks (ANNs) to predict elastic modulus of both normal and high strength concrete is investigated. The paper aims to show a possible applicability of ANN to predict the...

Neural network model for resilient modulus of emulsified asphalt mixtures.
July 1, 2008... Abstract This paper explores the potential use of neural networks (NNs) in the field of emulsified asphalt mixtures. A neural network model is developed for predicting, with sufficient approximation, relationship between the factors...

Calcination of Roman cement: a pilot study using cement-stones from Whitby.
July 1, 2008... Abstract Roman cement was patented in 1796 and established as a major material in the development of European architecture and engineering in the 19th century. However, the market is poorly served for those conservators wishing to use...

Influence of thermal damage on physical properties of a granite rock: porosity, permeability and ultrasonic wave evolutions.
July 1, 2008... Abstract In this paper, parameters for characterization of connected porosity and overall damage in the thermally-cracked rock of granite in order to assess, respectively, its transport properties and its mechanical strength are identified...

The investigation on the workability of fibre cocktail reinforced self-compacting high performance concrete.
July 1, 2008... Abstract The workability, the strength and the toughness are the significant factors for self-compacting-high performance concrete (SCHPC). The workability is a significant precondition for application of the Fibre Reinforced SCHPC. This...

Thermal treatment and utilization of flue gas desulphurization gypsum as an admixture in cement and concrete.
July 1, 2008... Abstract In this paper, the possibility of flue gas desulphurization (FGD) gypsum as an admixture in cement and concrete was explored. The gypsum was baked at the proper temperature of 200 [degrees]C for 60 min and then mixed into slag...

Use of binary and ternary blends in high strength concrete.
July 1, 2008... Abstract Combinations of cement additions may provide more benefits for concrete than a single one. In this study, 80 high strength concretes containing several types and amounts of additions were produced. In the first stage, silica fume...

The pozzolanic properties of paper sludge waste.
July 1, 2008... Abstract The use of paper de-inking sludge in pozzolanic material manufacture permits a disposable residue to be included in the cycle of the materials. A study on the reuse of paper de-inking sludge, undertaken in Spain, shows its...

Bond characteristics of plain and deformed bars in lightweight pumice concrete.
July 1, 2008... Abstract An investigation is conducted to determine the bond characteristics of plain and deformed reinforcing bars in lightweight volcanic pumice concrete (VPC) and normal concrete (NC). VPC and NC are manufactured by incorporating...

Failure mechanism of recycled aggregate concrete.
July 1, 2008... Abstract The use of recycled aggregate concrete (RAC) acquires particular interest in civil construction regarding sustainable development. Recycled aggregates usually present greater porosity and absorption, and lower density and strength...

Evaluation of destruction specific energy of fly ash and slag admixed concrete interlocking paving blocks (CIPB).
July 1, 2008... Abstract Concrete interlocking paving blocks (CIPB) are widely used in flooring and covering applications such as city roads, pedestrian foots, gardening architecture and many surface coverings. The focus of this study is to evaluate...

Performance of ground blast furnace slag and ground basaltic pumice concrete against seawater attack.
July 1, 2008... Abstract The aim of this research work is to investigate the seawater resistance of the concrete incorporating ground blast furnace slag (GBS) and ground basaltic pumice (GBP) each separately or both together. The variable investigated in...

Performance of carbon, polyvinylalcohol and steel based microfibers on alkali-silica reaction expansion.
July 1, 2008... Abstract The performance of carbon, polyvinylalcohol (PVA) and steel microfibers on alkali silica reaction (ASR) were investigated. Two series of mortar specimens containing different amounts of microfibers were cast. One of the series was...

Strength analysis of bamboo by microscopic investigation of bamboo fibre.
July 1, 2008... Abstract This paper presents the mechanical properties of two bamboo species, namely Mao Zhu and Kao Zhu, which are commonly used for scaffolding in Southern China. Variations of the compressive strength against the physical properties of...

Evaluation of concrete mixes and mineral additions when used with controlled permeable formwork (CPF).
July 1, 2008... Abstract The influence of concrete mixes and commonly used mineral additions and their effects on the near surface performance of vertically cast concrete against controlled permeable formwork (CPF) are the focus of this study. Three...

Structural performance of the finger-jointed strength of some wood species with different joint configurations.
July 1, 2008... Abstract This study was conducted to evaluate the effects of adhesive type, wood species, and finger joint configurations on structural performance of the finger joint. The wood species studied were oriental beech (Fagus orientalis...

An investigation into the critical factors affecting the performance of composite controlled permeable formwork liners: part I- drainage medium.
July 1, 2008... Abstract The critical elements associated with a CPF drainage medium and their associated effects on the near surface performance of vertically cast concrete slabs are the focus of this study. A range of board absorption levels, textured...

Effect of temperature on porosity and on chloride diffusion in cement pastes.
July 1, 2008... Abstract This paper is related to the effect of temperature upon the diffusive properties and the microstructural features of cementitious materials. Our experimental studies aim at linking the transport properties to the porosity and the...

IC debonding resistance of groups of FRP NSM strips in reinforced concrete beams.
July 1, 2008... Abstract The use of fibre reinforced polymer (FRP) externally bonded (EB) plates in the form of pultruded and wet lay-up plates is now generally accepted as an efficient and unobtrusive technique for retrofitting reinforced concrete...

Study of the corrosion of reinforcement in concrete elements used for the repair of monuments.
July 1, 2008... Abstract The conservation of cultural heritage is a demanding and imperative task. Of particular interest is the prevention of damage in monuments in load bearing elements made of reinforced concrete. In this case, the remediative...

Hydric, thermal and mechanical properties of self-compacting concrete containing different fillers.
July 1, 2008... Abstract Water vapor diffusion coefficient, water absorption coefficient, water permeability, thermal conductivity, compressive strength and freeze resistance properties of two self-compacting concretes (SCC) containing limestone filler...

Calendar.(Calendar)
July 1, 2008... Calendar Event Date and venue Details from 2008 11th International 11-14 May Contact: Conference on Istanbul, Dr. Nil Sahal, Durability of Turkey ...