Pan American Materials Congress: Materials for Infrastructure: Session I
Sponsored by: Third Pan American Materials Congress Organizing Committee
Program Organizers: Henry Colorado, Universidad de Antioquia; Oliverio Rodriguez, Centro de Investigacion en Química Aplicada

Wednesday 3:40 PM
March 1, 2017
Room: Pacific 21
Location: Marriott Marquis Hotel

Session Chair: Oliverio Rodriguez, Centro de Investigacion en Química Aplicada

3:40 PM  Invited
Porous Asphalt Mixtures With 100% Siderurgic Aggregates: Marta Skaf1; Vanesa Ortega-López1; Angel Aragón1; José San-José2; Javier González2; 1University of Burgos; 2UPV/EHU
    In this research, the possibility of making a porous asphalt mixture manufactured completely with recycled aggregates from carbon steel production was explored. Electric arc furnace slag (EAFS) was used as coarse aggregate and ladle furnace slag (LFS) as fine aggregate and filler. Initially, the properties of both slags and their suitability to be used in the manufacture of porous mixtures were analyzed. Then, a series of asphalt mixtures were developed incorporating these slags and they were compared with a reference mixture, made with conventional components. A series of tests were performed, including concepts such as mechanical behavior, durability, moisture susceptibility, rutting resistance, permeability or skid resistance. The results show that it is possible to make a suitable porous asphalt mixture with 100% of steel slag aggregates, complying with the standard requirements and obtaining a durable and environmentally sustainable mixture.

4:10 PM  
Physical and Mechanical Properties of Bricks with Added Industrial Waste: Alejandro Martinez1; 1Universidad de Santander
    This study evaluates the effect on the physical properties of the addition industrial ceramic bricks soot. physical properties as quantification and sample components that provide information permeability and cohesion of clay were studied by X-ray Diffraction. The analysis of the mechanical properties were evaluated by testing compression and absorption by the Colombian Technical Standard NTC: 4017: 2005 - Sampling and Testing masonry units and other clay products. Five different samples of mixtures of clay and soot were prepared to evaluate their properties with respect to conventional bricks. The results show that the ceramic bricks with the addition of industrial waste has greater structural strength over conventional.

4:30 PM  
Portland Cement Paste Blended With Pulverized Coconut Fibers: Yailuth Loaiza Lopera1; Henry Colorado Lopera1; 1Universidad de Antioquia
    The main objective of this paper is to evaluate the compressive strength and thermo-chemical stability of ordinary Portland cement paste blended with pulverized coconut fibers at different contents. Mixtures of the 1 %, 5 % and 10 % weigh percent of fibers were made and evaluated in compression, density, thermal and water degradation. Characterization was conducted by optical and scanning electron microscopy.

4:50 PM  
Fiber Reinforced Concrete Manufactured with Electric Arc Furnace Slag: Vanesa Ortega-López1; José Fuente-Alonso1; Amaia Santamaría2; Marta Skaf1; Juan Manso1; 1University of Burgos; 2UPV/EHU
    The use of electric arc furnace slag (EAFS), a by-product of the steelmaking industry, as an aggregate in concrete has been demonstrated to be a good practice in its manufacture. Furthermore, the incorporation of fibers in concrete provides a more ductile behavior, increasing their tenacity and load capacity, improving the flexotraction strength and controlling shrinkage cracking. The purpose of this research was to study the performance improvement by reinforcing steel-slag concrete with metallic or synthetic fibers added in different amounts. Some of the properties evaluated were: consistency of freshly mixed concrete by Abrams cone, compressive strength, flexotraction strength and indirect tensile strength. The results show a substantial improvement of the performance of the steel-slag concrete when it is reinforced with fibers. It also fulfils the requirements of “depth of water penetration under pressure” test, even in the worst environmental exposure case.

5:10 PM  
Performance of Hydraulic Mixes Manufactured with Electric Arc Furnace Slag Aggregates: Amaia Santamaría1; Vanesa Ortega-Lopez2; Marta Skaf2; Ignacio Marcos1; José-Tomás San José1; Javier González1; 1University of Basque Country; 2University of Burgos
    Electric arc furnace slag (EAFS) has for many years simply been dumped in landfill sites; over the past few decades many researchers have investigated its reuse in cement, mortar and concrete. By doing so, a waste product may be converted into a useful material with added value as a substitute for natural resources, the consumption of which is also minimized. Hydraulic mixes manufactured with EAFS normally have similar or even better hardened properties than mixes manufactured with natural aggregates. One disadvantage in the use of EAFS has been the poorer workability of the mixes, due to its higher density, porosity and water absorption levels. In this research, different EAFS mixes are manufactured and their properties in the fresh and the hardened state are closely analyzed; the results were very promising. The aim of this research is to demonstrate that EAFS concrete can achieve an acceptable workability at the correct dosages.