Showing papers in "Construction and Building Materials in 2011"

TL;DR: In this paper, the use of vegetable fibres as reinforcement in cement based materials is discussed, and the compatibility between the fibres and the cement matrix and also how they influence cement properties.

TL;DR: In this paper, the pore structure and chloride permeability of concrete containing nano-particles (TiO2 and SiO2) for pavement are experimentally studied and compared with that of plain concrete, concrete containing polypropylene (PP) fibers and concrete containing both nano-TiO 2 and PP fibers.

TL;DR: In this paper, the authors reviewed current knowledge about nanotechnology and nanomaterials used by the construction industry, including the use of nanoparticles to increase the strength and durability of cimentitious composites.

TL;DR: In this article, the authors developed a mathematical model to characterize the relationship between compressive strength and porosity for porous concrete by analyzing empirical results and theoretical derivations, which was derived from Griffith's theory.

TL;DR: In this paper, the authors examined the durability properties of the recycled aggregate concrete (RAC) and showed that the RAC exhibits a good UPV value, low water absorption and low intrinsic permeability.

TL;DR: In this article, the effect of both partial and full replacement of natural coarse aggregates by coarse RCA in a fly ash concrete is discussed. And the results obtained showed that while embedding high amount of the RCA could lower the resistance to chloride penetration and carbonation of concrete still comparable design strength to that of the control mix might be achieved.

TL;DR: In this paper, a review of existing literature in the area of nano-modification of asphalt and proceed to apply nano-materials to asphalt to improve the performance is presented.

TL;DR: In this paper, the influence of supplementary cementitious materials (SCMs), namely silica fume, metakaolin, fly ash and ground granulated blast-furnace slag, on the engineering properties of high strength concrete (HSC) has been investigated in order to quantify the effects of different materials.

TL;DR: In this article, the physicico-mechanical behavior of nano metakaolin and nano-clay was studied and the results showed that, the replacement of OPC by 6 ¾wt.% NMK increases the compressive strength of blended mortar by 18% compared to control mix and the combination of 6 ¼ wt.%.

TL;DR: In this article, the authors reviewed various waste materials in different compositions that were added to the raw material at different levels to develop waste-create bricks (WCB) and suggested various physico-mechanical and thermal properties of the bricks incorporating different waste materials.

TL;DR: In this paper, a microwave-assisted technique to increase the quality of RCA by partially removing the mortar adhering to RCA particles and breaking up the lumps of mortar present in RCA is introduced.

TL;DR: In this article, the physical and mechanical properties of recycled concrete with high inclusion levels of RCA and crushed clay bricks were investigated and the potential or limitation of this type of mixed recycled aggregate in primary concrete structures.

TL;DR: In this article, the effects of adding residual rice husk ash (RHA) from South Vietnam, generated when burning Rice husk pellets in the boiler, to cement were investigated.

TL;DR: In this paper, the authors describe the procedures and results of a laboratory investigation of mechanical properties carried out on the concrete specimens containing diatomite and WMP as partial replacement of cement in concrete.

TL;DR: In this paper, the flexural performance of four hybrid UHPFRCs with different macro fibers was investigated according to ASTM standards C1018-97 and C 1609/C 1609M-05.

TL;DR: In this article, three combustion methods and two grinding methods were used to investigate physical characteristics and chemical aspects of rice husk ash (RHA) produced using a rudimentary furnace of the National University of Malaysia (UKM).

TL;DR: In this paper, the authors describe the results of an experimental investigation on the performances of concrete specimens reinforced with either steel or macro-synthetic fibres under three-point bending.

TL;DR: In this paper, the authors investigated the possibility of using Rice Husk Ash (RHA) to produce ultra high performance concrete (UHPC) and found that the compressive strength of UHPC incorporating RHA, with the mean size between 3.6μm and 9μm, can be achieved in excess of 150 MPa with normal curing regime.

TL;DR: In this paper, the authors demonstrate the possibility of using marble wastes as a substitute rather than natural aggregates in concrete production and demonstrate the mechanical properties of concrete specimens produced using the marble wastes.

TL;DR: In this paper, the most convenient calcination temperature of kaolinite clays in view of producing geopolymer cements was determined by determining their setting time, linear shrinkage and compressive strength.

TL;DR: In this article, an experimental investigation was conducted to study the effect of using copper slag as a fine aggregate on the properties of cement mortars and concrete, which revealed that all mixtures with different slag proportions yielded comparable or higher compressive strength than that of the control mixture.

TL;DR: In this article, the results of some tests for an approach to a broader testing on the possibility of using fibers from polyethylene terephthalate (PET) bottles to increase the ductility of the concrete are reported.

TL;DR: In this paper, the feasibility of using aggregate from recycled construction and demolition waste (RCDW) in pavement applications was evaluated by geotechnical characterization, bearing capacity and repeated load triaxial tests.

TL;DR: An overview of bacteria, their types based on the classification has been studied in this paper, and the effect of bacteria on various parameters in concrete proves to be beneficial development, including compressive strength, permeability, water absorption, chloride ingression.

TL;DR: In this paper, the impact of polypropylene fibers on LECA Lightweight Self-Compacting Concrete (LLSCC) performance at its fresh condition as well as its mechanical properties at the hardened condition was analyzed.

TL;DR: In this paper, the influence of short-term and long-term thermal oxidative ageing on the dynamic viscosity, thermal stabilities, and infrared spectra of styrene-butadiene-styrene (SBS)- and storage-stable SBS/sulfur-modified asphalts were studied respectively.

TL;DR: In this paper, an extensive experimental program was performed on HPC, using different degrees of internal curing, to assess the mechanical and thermal properties of the HPC and to evaluate the effectiveness of the performed curing.

TL;DR: In this article, externally bonded grids are used as a means of increasing the load-carrying and deformation capacity of unreinforced masonry (URM) walls subjected to cyclic loading.

TL;DR: In this article, the authors used hybrid steel and polypropylene fibers to improve the ductility of pumice lightweight aggregate concrete by incorporating hybrid steel-polypropylene fiber reinforcement system.

TL;DR: In this article, the authors determined the stress-strain curve of the recycled concretes by replacing different percentages of the natural coarse aggregate with recycled coarse aggregate (20, 50% and 100%).