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In this study, four samples of recycled aggregates from the construction and demolition waste of Mexico City were characterized in order to find innovative uses for these types of materials. Gravel and sand from a recycling plant were analyzed, as well as aggregates produced in the laboratory from demolished concrete collected from landfills. The characterization was carried out by means of XRD (X-ray Diffraction), chemical microanalysis (EDS), X-ray fluorescence (XRF), pH measurement, and sieve analysis. The minerals present in the analyzed materials were feldspars, cristobalite and pyroxene, which corresponded to the natural aggregates, as well as variable amounts of calcite, a product of the carbonation of the cement paste adhered to these aggregates, and in a smaller proportion, calcium hemicarboaluminate, rosenhanite, and tobermorite. The quality (amount of cement) of the original concrete has a great influence on the granulometry and the chemical–mineralogical composition of the aggregates, since there will be different quantities and qualities of the cement paste adhered to the aggregates depending on their size. Finally, the pH values measured in all samples fluctuated between 10.15 and 12.08, suggesting that these materials can be used in soil stabilization or in agricultural applications.
Emiliano Moreno-Pérez; Juan Hernández-Ávila; Yamile Rangel-Martínez; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodriguez. Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City. Minerals 2018, 8, 237 .
AMA StyleEmiliano Moreno-Pérez, Juan Hernández-Ávila, Yamile Rangel-Martínez, Eduardo Cerecedo-Sáenz, Alberto Arenas-Flores, Ma. Isabel Reyes-Valderrama, Eleazar Salinas-Rodriguez. Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City. Minerals. 2018; 8 (6):237.
Chicago/Turabian StyleEmiliano Moreno-Pérez; Juan Hernández-Ávila; Yamile Rangel-Martínez; Eduardo Cerecedo-Sáenz; Alberto Arenas-Flores; Ma. Isabel Reyes-Valderrama; Eleazar Salinas-Rodriguez. 2018. "Chemical and Mineralogical Characterization of Recycled Aggregates from Construction and Demolition Waste from Mexico City." Minerals 8, no. 6: 237.
In cities with problems of aridity and a shortage of drinking water supply, there is an urgent need to establish alternatives for an adequate water management program. This study proposes an estimation through which users can select a rainwater harvesting system for non-drinking water consumption. For the cities of Pachuca and Mineral de la Reforma, State of Hidalgo, Central Mexico, the historical record of rainfall analyzed covers a period of 33 years (1980–2013). We calculated the monthly volume of rainwater harvestable from roof areas (VR, m3) with household roof areas (Hra) of 45 m2, 50 m2, 100 m2 and 200 m2. It is proposed to replace in each single house the flush toilets and washing machine with ecological devices with consumptions of 4.8 L/flush and 70 L/load, respectively. Furthermore, a maximum and a minimum consumption of eight and six flushes/day/person (flush toilets) and five and four loads/week (washing machine), respectively, are proposed. From these considerations, our estimations of the harvestable rainwater showed that households with Hra of 45 m2 and 50 m2 would depend on the water supply system of the public network during part of the year. On the other hand, households with Hra of 100 m2 and 200 m2 might be able to store enough water to meet other needs besides toilet flushing and laundry.
Liliana Lizárraga-Mendiola; Gabriela Vázquez-Rodríguez; Alberto Blanco-Piñón; Yamile Rangel-Martínez; María González-Sandoval. Estimating the Rainwater Potential per Household in an Urban Area: Case Study in Central Mexico. Water 2015, 7, 4622 -4637.
AMA StyleLiliana Lizárraga-Mendiola, Gabriela Vázquez-Rodríguez, Alberto Blanco-Piñón, Yamile Rangel-Martínez, María González-Sandoval. Estimating the Rainwater Potential per Household in an Urban Area: Case Study in Central Mexico. Water. 2015; 7 (12):4622-4637.
Chicago/Turabian StyleLiliana Lizárraga-Mendiola; Gabriela Vázquez-Rodríguez; Alberto Blanco-Piñón; Yamile Rangel-Martínez; María González-Sandoval. 2015. "Estimating the Rainwater Potential per Household in an Urban Area: Case Study in Central Mexico." Water 7, no. 12: 4622-4637.