Showing papers in "Construction and Building Materials in 2007"

TL;DR: In this paper, the influence of nano-SiO 2 (NS) addition on properties of hardened cement paste (hcp) as compared with silica fume (SF) has been studied through measurement of compressive and bond strengths of hcp, and by XRD and SEM analysis.

TL;DR: In this paper, the properties of cement mortars with nano-SiO 2 were experimentally studied, and the results showed that the compressive strength of mortars containing nano SiO 2 particles was significantly higher than those of those containing silica fume at 7 and 28 days.

TL;DR: A review of research that has been conducted on polymer modified binders over the last three decades can be found in this paper, where the elastic recovery test is good at determining the presence of polymers in an asphalt binder but is less successful at predicting field performance of the pavement.

TL;DR: In this article, the authors evaluate mechanical properties of control and modified asphalt mixtures and compare the interaction between LCPC wheel tracking and other mechanical tests for different loading conditions and temperatures.

TL;DR: In this paper, the effects of aspect ratio (l/d) and volume fraction (Vf) on the compressive strength, split tensile strength, flexural strength and ultrasonic pulse velocity of steel fiber reinforced concrete (SFRC) were investigated.

TL;DR: The results of the ambient-vibration based investigations carried out to assess the structural conditions of a masonry bell-tower are presented in this paper, which is characterized by the presence of major cracks on the western and eastern loadbearing walls.

TL;DR: In this paper, the authors proposed a hybrid FRP-concrete-steel double-skin tubular column, which consists of an outer tube made of fiber reinforced polymer (FRP) and an inner tube making of steel, with the space between filled with concrete.

TL;DR: In this paper, the effects of pozzolan made from various byproduct materials on mechanical properties of high-strength concrete were investigated and the results suggest that concretes containing FA, FB, RHBA, and POFA can be used as pozzolic materials in making high strength concrete with 28-day compressive strengths higher than 80 MPa.

TL;DR: The influence of block geometry (aspect ratio, test procedure and basic material parameters (dry density, cement content, moisture content) on compressive strength testing of compressed earth blocks is discussed in this paper.

TL;DR: In this article, the effect of fly ash fineness on pore size and microstructure of hardened blended cement pastes was investigated and it was shown that the pore sizes of blended blended cement paste were significantly affected by the rate of replacement and the fineness of the fly ash.

TL;DR: In this article, a realistic approach has been made using different techniques such as compressive strength, bond strength, split tensile strength etc. Corrosion performance was evaluated using, open circuit potential measurements, rapid chloride ion permeation test and impressed voltage test and the results were discussed.

TL;DR: In this paper, the compressive strength and water permeability of concretes containing ground palm oil fuel ash (GPOA) and ground rice husk-bark ash (GRBA) were investigated.

TL;DR: In this paper, three recycled coarse aggregate (RCA) replacement percentages (i.e., 0, 50% and 100%) and two types of steel rebars (plain and deformed) were considered in order to investigate the bond behavior between recycled aggregate concrete (RAC) and rebars.

TL;DR: In this paper, an investigation conducted in Thailand on the development of coconut co-ir-based lightweight cement boards (CCB) is presented, which are intended to be used as building components for energy conservation.

TL;DR: In this article, the most widely used aggregate shape analysis techniques were evaluated and the analysis results revealed that some of the available analysis methods are influenced by both angularity and form changes and, consequently, are not suitable to distinguish between these two characteristics.

TL;DR: In this paper, the fresh and mechanical properties of a fiber reinforced self-compacting concrete incorporating high-volume fly ash that does not meet the fineness requirements of ASTM C 618 were evaluated.

TL;DR: In this article, the sulfate resistance of blended Portland cement with fly ash and ground rice husk ash (RHA) was studied, and it was shown that RHA was more effective than fly ash in reducing the expansion of the mortar bars and the pH values.

TL;DR: In this paper, the performance of reinforced concrete (RC) beams with Dramix RC-80/0.60-BN type of steel fibers (SFs) at dosages of 0, 30, 60, 60 kg/m3 and their compressive strengths, split tensile strength, moduli of elasticity and toughnesses are measured.

TL;DR: In this paper, the authors have developed a production method for recycled concrete that is different from that of the draft, and the recycled coarse aggregate is produced by a simple assembled system of equipment, and is mixed with ordinary coarse aggregate to ensure the quality required of structural concrete.

TL;DR: In this paper, an epoxy emulsion based polymer system has been developed for improving the properties of plain cement mortar or concrete, which has superior strength properties and better resistance to the penetration of chloride ions and carbon dioxide.

TL;DR: Wang et al. as discussed by the authors proposed a two-stage mixing approach (TSMA) for improving the strength of recycled aggregate concrete (RAC), by testing mixes with up to 30% RA replacement.

TL;DR: In this paper, the properties of recycled tire rubber modified asphalt mixtures using dry process were studied in laboratory, and the rubber content has a significant effect on the performance of resistance to permanent deformation at high temperature and cracking at low temperature.

TL;DR: In this paper, the authors evaluated the comfort of some interior floor coatings by comparing thermal images obtained from the sole of a barefoot after having been in contact with different materials, and the results of these experiments are presented in this paper.

TL;DR: In this article, the authors present the results of a study on the effectiveness of incorporating air cleaning agents such as titanium dioxide (TiO2) into the technique of producing concrete paving blocks, using local waste materials to remove nitrous oxide (NO).

TL;DR: In this paper, the use of externally bonded high modulus carbon fiber reinforced polymer (HM CFRP) materials to strengthen steel bridges and structures is discussed, where the surface preparation of the materials, the application of the adhesive and detailing of the strengthening are provided in detail.

TL;DR: In this paper, 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 were investigated.

TL;DR: In this paper, the roughness profile of the substrate surface was obtained with digital image processing and several roughness parameters were assessed based on this profile and were correlated with the corresponding bond strength, both in shear and in tension.

TL;DR: In this article, the results of an experimental investigation to study the effects of replacement of cement with three percentages of fly ash and effects of addition of steel and polypropylene fibers are presented.

TL;DR: In this paper, the authors evaluated the mechanical properties and durability of concrete using metakaolin and found that the filler effect resulting from the fine powder of both binders was seen to ameliorate substantially the resistance to chemical attacks in comparison with ordinary concrete.

TL;DR: In this paper, a finite element analysis of FRP-jacketed thin cylindrical shells under axial compression and internal pressure was presented to show that FRP jacketing is also an effective strengthening method for such shells failing by elephant's foot collapse near the base.