Showing papers in "Construction and Building Materials in 2010"

TL;DR: In this paper, the state of the field of nanotechnology in concrete is reviewed and the impact of recent advances in instrumentation and computational materials science and their use in concrete research is discussed.

TL;DR: In this article, the authors discuss the development of the advanced polymer composite material applications in the building and civil/structural infrastructure over the past three to four decades and highlight the important in-service research areas which are necessary to improve the understanding of the behavior of FRP materials and FRP structural components.

TL;DR: In this paper, the effect of curing temperature (10, 20, 40, 60 and 80°C) and time on the compressive and flexural strengths, pore distribution and microstructure of alkali activated metakaolin material was analyzed.

TL;DR: In this article, two crack classification methods are compared and discussed from results of three types of concrete failure tests, and it is shown that the ratios of the shear crack which are identified by Green's functions for moment tensor analysis are good agreement with those by parameter analysis in the case that the proportion of the RA value and the average frequency is set to 1-200.

TL;DR: In this paper, the strength development in cement-stabilized silty clay is analyzed based on microstructural considerations, which includes water content, curing time, and cement content.

TL;DR: In this article, the feasibility of using calcined-clay wastes in concrete was examined and it was shown that concrete with 20% cement replacement outperformed the control concrete mixtures concerning compressive strength, capillary water absorption, oxygen permeability and chloride diffusion.

TL;DR: In this paper, a powder obtained as a byproduct of marble sawing and shaping was characterized from a chemical and physical point of view in order to use it as mineral addition for mortars and concretes, especially for self-compacting concrete.

TL;DR: In this paper, an investigation of mechanical behavior and elastic properties of recycled-aggregate concretes is presented, which shows that structural concrete up to C32/40 strength class can be manufactured by replacing 30% virgin aggregate with recycled-concrete aggregate.

TL;DR: In this paper, the effect of different fibers, mixing procedures and executive problems on asphalt concrete is inspected, where the authors focus on the first side of the coin and investigate FRAC materials modified by random fiber inclusion.

TL;DR: In this article, a triple mixing method was developed to realize surface-coating of aggregate with pozzalanics materials for further improving microstructure of interfacial transition zone (ITZ) and properties of recycled aggregate concrete (RAC).

TL;DR: In this article, the authors focused on the balance between permeability and strength properties of polymer-modified pervious concrete (PMPC) mixtures, which included natural sand and fiber to enhance the strength properties.

TL;DR: In this paper, the properties of MPC mortars with different magnesium to phosphate (M/P) molar ratios and sand to binder (S/B) weight ratios have been investigated.

TL;DR: In this paper, the authors developed the compressive strength, water permeability and workability of concrete by partial replacement of cement with agro-waste rice husk ash.

TL;DR: In this paper, the physical and mechanical properties of fly ash-based geopolymer paste with varying levels of sand aggregate were studied. But the results showed that increasing sand content without increasing the amount of alkaline activator resulted in a decreasing level of geopolymisation within the binder system.

TL;DR: Sisal fiber-cement composites reinforced with long unidirectional aligned fibers were developed and their physical-mechanical behavior was characterized in this article, where flat and corrugated sheets were cast by a manual lay-out of the fibers in a selfcompacted cement matrix and compressed with a pressure of 3MPa.

TL;DR: In this article, the orientation and distribution of steel fiber-reinforced concrete are investigated by means of a suitable technique, by using a translucent fluid model with a yield stress (Carbopol 940).

TL;DR: In this paper, the hydration properties of steel slag were investigated and different hydration conditions were set by changing the temperature or pH value, and the results showed that steel's hydration process was similar with that of cement.

TL;DR: In this paper, the authors compared the fresh and hardened state properties of rubberized concrete to highlight and confirm the key characteristics of the material and made recommendations for future work and directions for this field of research have been detailed.

TL;DR: In this paper, several regression, neural networks (NNT) and ANFIS models are constructed, trained and tested to predict the 28-days compressive strength of no-slump concrete (28-CSNSC).

TL;DR: In this paper, the stabilization of soils with natural polymers and fibres to produce a composite, sustainable, non-toxic and locally sourced building material has been studied using a clay soil supplied by a Scottish brick manufacture.

TL;DR: In this paper, the impact resistance and strength performance of concrete mixtures with polypropylene and silica fume is examined and it is shown that using 0.5% polypropane fiber in the silica mixture increases compressive split tensile, and flexural strength, and especially the performance of concretes under impact loading.

TL;DR: In this paper, an experimental investigation was carried out to evaluate the mechanical and durability properties of high performance concretes containing supplementary cementitious materials in both binary and ternary systems.

TL;DR: In this paper, the results of an experimental program on Reinforced Concrete (RC) beams externally strengthened with carbon Fibre Reinforced Plastic (FRP) laminates and Near Surface Mounted (NSM) bars under monotonic and cyclic loads, the latter ones characterized by a low number of cycles in the elastic and post-elastic range.

TL;DR: In this paper, a research project supported by the Ministry of Knowledge Economy (MKE) was proposed for the development of hybrid cable-stayed bridges, where the authors would like to express their gratitude for the supports.

TL;DR: In this article, the use of fine particles of glass and glass aggregates in mortars, either separately or combined, was investigated and two antagonistic behaviours can be observed: alkali-silica reaction, which involves negative effects, and pozzolanic reaction, improving the properties of concrete.

TL;DR: In this paper, four granular fractions were combined in different proportions in order to investigate the effect of the particle size distribution (PSD) of aggregate on the properties of concrete, and two types of chemical admixtures, water reducer agent (WRA) and superplasticizer (HRWRA), were used to decrease the water-cement ratio.

TL;DR: In this paper, the influence of activator ratio, time, and curing temperature on the mechanical strength of geopolymers synthesized from natural zeolite was evaluated by employing silicate solutions and sodium hydroxide.

TL;DR: In this article, organophilic montmorillonite/SBS modified bitumen mixtures were prepared by melt intercalated blending and the results showed that the presence of nanoclay improves the storage stability of PMB significantly without adverse effect on other properties of it.

TL;DR: In this article, the authors investigated mechanical and permeability properties at early ages of an alkali-activated slag concrete (AASC) reinforced with steel fibers and found that compressive, splitting tensile and flexural strengths, flexural notch sensitivity, pull-out and water absorption properties were evaluated.

TL;DR: In this article, the potential for usage of coarse recycled aggregate obtained from crushed concrete for making of self-compacting concrete was researched, additionally emphasizing its ecological value, and the issue of the waste disposal sites created by the demolition of old structures is solved.