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Reconstrucción post-desastre 1755-2014: ¿Realmente hemos aprendido algo?

Este documento está enfocado en dos eventos muy diferentes de los cuales se desarrollaron nuevas formas de tratar con las catástrofes: un terremoto que destruyó una capital mundial  y un incendio que destruyó un pequeño pueblo rural. Además de que es difícil comparar las lecciones de una época y situación particular con otra, es perturbador ver que todavía no somos capaces de vivir con las metas autoproclamadas de “sostenibilidad” y “reconstruir mejor” cuando ocurre una catástrofe.

Embodied energy in different walling systems

Por más de tres décadas, muchos científicos han trabajado en la definición de “carga ecológica”  para diferentes materiales de construcción. Esto incluye el conteo de toda la energía que va dentro del producto, desde la minería y obtención de materias primas, pasando por la producción y el transporte hasta la construcción de la pared.

Artículo relacionado: Paneles de FerroCemento considerados “Materiales Verdes”

Social housing in Nicaragua: Simplicity with style
Social housing in Nicaragua: Simplicity with style
A Refuge Made From Refuse
By HILLARY BRENHOUSE
In the 1990s, Elsa Zaldívar, director of Base- ECTA, a rural development organization, was working with women in Caaguazú, in central Paraguay, growing and harvesting loofah for export to make mats, slippers and sponges. Ms. Zaldívar noticed that nearly a third of the harvested crop was below export quality, and more was ending up as waste trimmings in the manufacturing process.
Responding to the needs of the working poor

Lack of shelter is a major problem in most countries, but if you assume that governments and private business are working hand in hand to alleviate the housing shortage, in most cases, you would be wrong. Providing shelter for growing populations is not exactly an effort shared in good faith among all society’s actors.

Although they use similar rhetoric and most profess to be concerned about the homeless poor, there are definitely different motives behind the slogans presented by governments, non-government organisations (NGOs), private companies, and the various ‘in betweens’.

Creative solutions for fast, durable and affordable reconstruction Setting the base for disaster mitigation

We propose a novel solution to provide solid and durable emergency shelters within days of a catastrophe, shelters that actually are the core of a new house at affordable cost.

Instead of spending money, time and efforts on distributing tents and plastic sheets, we can start almost immediately with the erection of core units made of small ferrocement panels. It is a technology used in house construction in several countries, a system that actually gives a pleasing appearance in addition to its technical and financial advantages.

Housing reconstruction in post-earthquake Gujarat

by Jennifer Duyne Barenstein

Besides human casualties, one of the most visible and striking effects of any major disaster is the destruction of houses. Loss of housing destroys livelihoods, protection and privacy. Effective housing reconstruction is essential to restore affected communities’ dignity, society, economy and cultural identity.

Many humanitarian organisations assume that the quickest and most effective way to rebuild houses after a disaster is to employ professional construction companies. At the same time, however, there is growing awareness of the limitations and risks of the contractor-led approach. These difficulties are encouraging other, more participatory strategies.

Hurricane George - Report from the field
Hurricane George - Report from the field
Creative Ideas for fast, durable and affordable reconstruction which sets the base for disaster mitigation
This Project sketch focuses on combining disaster reconstruction with preparation for the mitigation of the next disaster which unfortunately is expected to happen.
It proposes a novel solution to provide solid and durable emergency shelters within days of a catastrophe, shelters that actually are the core of a new house at affordable cost. Instead of spending money, time and efforts on distributing tents and plastic sheets, it proposes to start immediately with the erection of core units made of small ferrocement panels. It is a technology used in house construction in several countries, system that actually gives a pleasing appearance in addition to its technical and financial advantages.
The EcoSur network is prepared for cooperation and know-how transfer with governments and civil society organizations to implement the proposal
Building scientific capacity in developing countries

By Eva Harris

Simply transferring knowledge and instrumentation is not enough to help developing countries build their own research base. Such efforts must be tied to national and local needs to create trust and services for society in the long term

Development of Ecomaterials for Low-Cost Housing - EPFL - UCLV
This joint research project is intended to study pozzolans derived from mineral or agricultural sources in developing countries and understand their effect as cement replacement in concrete. Through combined research in the field and characterisation tools available at EPFL, we hope to be able to support consistent production processes to predict the long term behaviour of such materials.
EcoSouth experts
EcoSouth experts have their feet on the ground and their hands on daily tasks, whether directing projects, managing organizations, research and development or tutoring students. In other words they are in touch and actively involved in their fields, building and producing. Thus, they can provide expertise from a constantly renewable base of real experiences. Multi-lingual, internationally experienced, dedicated to south-south knowledge sharing, they are not afraid of difficult situations and take to challenges with élan.
HOW TO CALCULATE THE ENERGY EFFICIENCY OF YOUR LIME BURNING PROCESS
The practice of burning limestone to produce quicklime is, almost literally, as old as the hills.
In terms of basic chemistry and materials, the process involves the conversion of calcium
carbonate, CaCO3, to the more useful calcium oxide, CaO. Calcium oxide is a very reactive
substance. In fact, it is so 'lively' that it is usually hydrated (has water added) to form calcium
hydroxide, Ca(OH)2.
The practice of burning limestone to produce quicklime is, almost literally, as old as the hills. In terms of basic chemistry and materials, the process involves the conversion of calcium carbonate, CaCO3, to the more useful calcium oxide, CaO. Calcium oxide is a very reactive substance. In fact, it is so 'lively' that it is usually hydrated (has water added) to form calcium hydroxide, Ca(OH)2.
Lime-pozzolan binder as a very fine mineral admixture in concrete.
The very high concrete strength and durability achieved in high and ultra-high-performance
concrete is associated with a very dense matrix, accomplished through the use of high
volumes of very fine mineral additions, such as fly ash, silica-fume, metakaolin and ground
quartz sand. The paper reports on a study where a finely ground lime-pozzolan binder (LPB)
is used as active mineral addition in concrete. The very fine lime particles, having size
between 0.1-10 μm, can fill the gaps between cement grains, while the larger pozzolan
particles, having size between 10-100 μm, can fill the gaps between fine aggregate grains;
this results in a much denser matrix. The addition of lime during concrete mixing also
increases the Ca+2 and OH- ion concentration, which results in a better and faster hydration
of both ordinary portland cement (OPC) and pozzolanic reaction products. The use of LPB as
an active addition in some ultra-high performance concretes could contribute to lowering the
cost of the product for equivalent strength and durability performance, through the use of less
cement, thus improving the ecologic profile of the material. Results from an initial series of
tests are examined in this paper; further testing is required to establish the benefits of the use
of LPC in UHP concrete. Examples of applications of this work in normal and high-
performance concrete are presented.
The very high concrete strength and durability achieved in high and ultra-high-performance concrete is associated with a very dense matrix, accomplished through the use of high volumes of very fine mineral additions, such as fly ash, silica-fume, metakaolin and ground quartz sand. The paper reports on a study where a finely ground lime-pozzolan binder (LPB) is used as active mineral addition in concrete. The very fine lime particles, having size between 0.1-10 μm, can fill the gaps between cement grains, while the larger pozzolan particles, having size between 10-100 μm, can fill the gaps between fine aggregate grains; this results in a much denser matrix. The addition of lime during concrete mixing also increases the Ca+2 and OH- ion concentration, which results in a better and faster hydration of both ordinary portland cement (OPC) and pozzolanic reaction products. The use of LPB as an active addition in some ultra-high performance concretes could contribute to lowering the cost of the product for equivalent strength and durability performance, through the use of less cement, thus improving the ecologic profile of the material. Results from an initial series of tests are examined in this paper; further testing is required to establish the benefits of the useof LPC in UHP concrete. Examples of applications of this work in normal and high-performance concrete are presented.
Poster MCR Tiles
Poster MCR Tiles
Micro Concrete Roofing Tiles - The curing tank
The tank is best built out of concrete blocks or bricks, and plastered on the inside. It must
have an outlet at the bottom so that all the water can be drained for a periodic washing of
the tank, it is of advantage if there is a slight inclination towards the draining hole
The tank is best built out of concrete blocks or bricks, and plastered on the inside. It must have an outlet at the bottom so that all the water can be drained for a periodic washing oft he tank, it is of advantage if there is a slight inclination towards the draining hole.
Clay Construction Manual. Instruction for Building of Clay Houses
Since clay is an ecological and economical building material and since clay construction has a long tradition in Namibia, the CHP was founded in order to support, demonstrate and disseminate throughout Namibia the building of clay houses instead of cement houses.
Dry Toilet Builders Manual

Congratulations! You have decided to build your Otji-Toilet by yourself. A good solution as well for you and for the environment, because the Otji-Toilet is an environment friendly ecosan toilet.

This brochure will help to finish the building job successfully.

Designing effective sand and mortar mixes for MicroConcrete Roof Tiles
To produce strong tiles, it is important to use clean sand with the correct ratio of fine grains (less than
1mm), medium sized grains (1mm to 21⁄2mm) and large grains. No sand grains should exceed 2⁄3 the tile thickness.
MicroConcrete Mini vaults: The light weight floor slab system
In many cities as well as small towns the living space has to be expanded vertically and multi-storey houses are becoming standard. However, one of the most difficult problems is to find a ceiling slab that is affordable and easy to build.
 
 
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Consultores

  • Kathryn Pozak
    Lic. Sc. Pol., Periodista, Suiza y canadiense
    Inglés, español, alemán (hablado)
    Conceptos generales y sinergias, monitoreo, evaluaciones.

     
  • Fernando Martirena
    Profesor, Ingeniero Civil, Dr. , Cuba
    Español, inglés, francés y alemán
    Investigación de materiales, específicamente cemento alternativo y productos de cemento. Concepción de proyectos.

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