Las normativas de construcción con tierra en el mundo/The earth building normative documents in the world

La tierra ha sido utilizada como material de construcción desde hace siglos. No obstante, la normativa al respecto está muy dispersa, y en la mayoría de países desarrollados surgen numerosos problemas técnicos y legales para llevar a cabo una construcción con este material. Este artículo estudia el panorama normativo para las construcciones con tierra cruda a nivel internacional, analizando cincuenta y cinco normas y reglamentos de países repartidos por los cinco continentes, que representan el estado del arte de la normalización de la tierra cruda como material de construcción. Es un estudio referenciado sobre las normas y reglamentos vigentes desarrollados por los organismos nacionales de normalización o autoridades correspondientes. Se presentan las normativas y los organismos que las emiten, analizando la estructura y contenido de cada una. Se estudian y analizan los aspectos más relevantes, como la estabilización, selección de los suelos, requisitos de los productos y ensayos existentes, comparando las diferentes normativas. Este trabajo puede ser de gran utilidad para el desarrollo de futuras normas y como referencia para arquitectos e ingenieros que trabajen con tierra. For centuries, earth has been used as a construction material. Nevertheless, the normative in this matter is very scattered, and in the most developed countries, carrying out a construction with this material implies a variety of technical and legal problems. This article analyzes, in an international level, the normative panorama about constructions with earth, analyzing fifty five standards and regulations of countries all around the five continents; these represent the state of art that normalizes the earth as a construction material. It is a study indexed on the actual procedures and regulations developed by the national organisms of normalization or correspondent authorities. The standards and the organisms that produce them appear, analyzing the structure and the content of each one. We have studied and analyzed the most relevant aspects, such as stabilization, soil selections, the requisites of the products and the existent test, comparing the diverse normative. The knowledge from this study could be very useful for the development of future standards and as a reference for architects and engineers that work with earth.

Approximation to earth material from international normative

For centuries, earth has been used as a construction material. Nevertheless, the normative in this matter is very scattered, and the most developed countries, to carry out a construction with this material implies a variety of technical and legal problems. In this paper we review, in an international level, the normative panorama about earth constructions. It analyzes ninety one standards and regulations of countries all around the five continents. These standards represent the state of art that normalizes the earth as a construction material. In this research we analyze the international standards to earth construction, focusing on durability test (spray and drip erosion tests). It analyzes the differences between methods of test. Also we show all results about these tests in two types of compressed earth block.

Unit Commitment and Electricity Prices Forecasting for Market Strategy Preparation in Interconnected Systems

In this paper we present a solution for building a better strategy to take part in external electricity markets. For an optimal strategy development, both the internal system costs as well as the future values of the series of electricity prices in external markets need to be known. But in practice, the real problems that must be faced are that both future electricity prices and costs are unknown. Thus, the first ones must be modeled and forecasted and the costs must be calculated. Our methodology for building an optimal strategy consists of three steps: The first step is modeling and forecasting market prices in external systems. The second step is the cost calculation on internal system taking into account the expected prices in the first step. The third step is based on the results of the previous steps, and consists of preparing the bids for external markets. The main goal is to reduce consumers' costs unlike many others that are oriented to increase GenCo's profits.