With an air of simplicity and wisdom, engineer Julio Vargas Neumann welcomes us. His two dogs accompany us as we descend after the necessary ascent to enter, and we are also accompanied by the stone walls defining the lot. We sit down and begin - or continue - the interview and conversation regarding the value of 'shicras', local materials, and earth construction. We also discuss criticisms of cement, aluminum, and steel, as well as perspectives on the future of materials in Peru and the world. Likewise, we delve into the long-neglected and recurrent rural problem in South America, discussing the inexorable need to change paradigms and priorities.
Concrete has enormous resistance to compressive stress, but it is a fragile material in terms of tension, which occurs when forces are applied in opposite directions of a structure, tending to separate the parts. This is why the incorporation of steel into concrete –which provides high levels of strength when stretched– has made so-called reinforced concrete the world's most widely used construction method. In other words, reinforced concrete combines the intrinsic advantages of its two components (concrete and steel reinforcement) to produce an extremely robust, versatile, and practical material. These steel reinforcements, in addition to reinforcing concrete, can also be used in art installations, facades, and even interiors.
As one takes a visual tour through the city, one might spot structures that break the rhythm of finished architectural products. These are buildings encased in grids of metal or wooden sections, sometimes wrapped in colored nets, that communicate a moment of construction, repair, renovation, or demolition. They are called scaffolding systems, temporary structures built in the city to aid in the erection or maintenance of buildings. However, they have evolved to speak their own architectural language. As city-making is a continuous process, scaffolds serve as beacons, proposing silhouettes of the height, shape, or forms of new buildings. They step into the sidewalks, acting as shade or obstructions to the flow of human and vehicular traffic. In contrast to the permanence of architecture, they exhibit a sense of temporality that helps communicate time, the growth of neighborhoods, and the evolution of a city.
One of the most important elements in architecture are the vertical circulations that are translated into elevators or stairs, and although some offices decide to approach it in a discreet way, some others choose to pay specific attention to it and turn it into a sculptural piece. Helicoidal staircases are some of the favorites when it comes to focusing attention and in our collective conscience we keep some iconic examples, as is the case of the staircase in the O'Gorman House, this piece gave a certain character to the work and it is almost impossible to imagine it without it.
No-Fines Concrete with Steel Slag Samples by L.Korat et al. (2015). Image via ResearchGate. Licensed Under CC BY-SA 3.0
The construction industry is one of the largest in the world, and cement and concrete are literally the building blocks of its success. Evolving from prehistoric caves to today’s towering skyscrapers, concrete structures have and will continue to be vital components of modern civilization, providing long-lasting, reliable support for buildings, roads, bridges, tunnels and dams. So much so that concrete is the most consumed material on Earth, second only to water, while the steel used to reinforce it is by far the most commonly used metal. But this doesn’t come without high environmental costs: concrete accounts for 8% of global CO2 emissions, much of which come from the extraction and transportation of aggregate materials such as sand, gravel and crushed stone.
Stairs are often an inevitable part of a building's DNA. Nowadays, staircases not only serve the function of practicality but are also a showcase of their own kind, especially if paired with a color that is guaranteed to grab attention. Among warm colors, red is considered to be the most powerful one. On one hand, it evokes feelings of joy and energy, and on the other, feelings of alertness and danger. Red can stimulate a whole range of emotions. Therefore, its usage should be attentive, delicate, and thought out.
Mies Van der Rohe and Lilly Reich’s German Pavilion for the 1929 Barcelona International Exhibition is known as the most written-about modern building. But no matter how many times the pavilion is redrawn for analysis, there are always new angles from which to interpret it. Identifying its capacity to redefine the German image, while genuinely introducing new strategies that continue present in contemporary architecture projects are two key elements of the architects’ intentions behind their design strategy.
'We have to get away from the coldness of functionalism. It is a mistake to believe that to understand the problem of modern architecture it is enough to recognize a necessity for rational solutions. Beauty in architecture, which is a necessity and finality for our time as for past periods, cannot be attained unless we can see beyond simple utility when we build.' – Mies Van der Rohe
Most of us use stairways every day, but few times do we stop to contemplate their design or put much thought into their function. With their steps, treads and railing, they are easily one of the most fundamental architectural elements in any home. Apart from providing a safe, simple and easy access from one floor to another, it is through staircases that architects create unique spatial forms and strong visuals. From afar, one can observe people moving up and down repeatedly; from within, the user is treated to new angles and ways to perceive a space. Therefore, good staircases are more than just means of vertical circulation. Through their might and scale, they can become the protagonist of a space – a design focal point that rises to the level of art. In this article, we present their versatile characteristics and material qualities through a selection of inspiring examples, all of which can be found in Architonic's 'Staircases' section.
BUGA Pavilhão de Fibra / ICD/ITKE Universidade de Stuttgart. Image Cortesia de ICD/ITKE University of Stuttgart
Let us return to the first architecture class on structures and the classification of structural efforts. In most structures, whether natural or man-made, compression forces are the primary actors. These are efforts undertaken with equal and opposing loads, applied in the interior of the structure, which tend towards the shortening of the piece in one direction - or compressing it, as the name indicates. It is not difficult to find examples of this: for example, a stone wall or a wooden log can resist the weight of a covering through internal compression efforts that are inherent to each material. Tension efforts, on the other hand, tend to lengthen components in the direction of the applied force of action. Steel, for example, is a material with good tensile strength. It is used in reinforced concrete precisely in the parts where the piece is in traction. But it is also possible for a structure to only have tensile parts, as is the case of membrane, tensioned, or tension structures, which consist of surfaces pulled by the action of cables or ropes in which the masts absorb compression efforts.
Whether to mark a change of direction, to highlight its first steps or its own presence in a room, stairs that combine two or more materials tend to draw attention by establishing dialogs between particular characteristics of each material. Concrete, steel and wood are some of the most common choices to compose the structure of stairs due to their high strength and versatility. But, when combined, these different materials expand their individual possibilities and reveal how the design can be tailored to their peculiarities and connections.
The combination of textures, colors, and finishes among materials can provide a number of creative solutions for these elements used for vertical circulation, as shown in LÂM’s Home, by AD+studio and House 9A, by 23o5Studio, characterized by stairs with a sturdy and rough base that meets a light and sleek structure of steps. The opposite composition order, a lighter base that meets a robust set of steps, thrives ingeniously in Luis Carbonell's Casa Chulavista and messina | rivas' Angatuba House, where the light wooden stairs' base is followed by raw concrete steps.
Bridge House / BIO-architects. Image Cortesia de Ivan Ovchinnikov
Metaphorically, building bridges equates to creating new opportunities, connections, and paths. The first bridges likely formed naturally with logs falling across rivers and natural depressions, though humans have also been building rudimentary structures to overcome obstacles since prehistory. Today, technological advances have made it possible to erect bridges that are both impressive and sculptural, playing a key role in transportation and connectivity. Usually needing to overcome large spans, with few points of support, bridges can be quite difficult to structure. But when is the bridge more than a connection between two points, instead resembling a building with a complex program? How can these 'bridge houses' be structured?
After centuries of using wood for the development of window and door carpentry, the Rationalism of the 20th century began to adopt a new material for these purposes: steel. Driven by industrial production, and promoted by architects such as Adolf Loos, Mies van der Rohe, and Le Corbusier, steel was evolving to generate increasingly thin and resistant frames. However, efficient and low-cost materials, such as aluminum and PVC, gradually began to replace its widespread use, increasing the size of the frames and losing steel's "clean" aesthetic when applied to a growing architecture of large glass paneled facades.
At present, new technologies have refined their production processes, developing minimal profiles of high rigidity and precision, which take full advantage of the transparency of the glass and deliver new comfort and safety features. We talked with Jansen's experts to deepen our understanding of their application in contemporary architecture.
Cracks, which could be classified according to their thickness as fissures or fractures, are serious problems in the construction industry that can negatively affect aesthetics, durability and, most importantly, the structural characteristics of a project. They can happen anywhere, but occur especially in walls, beams, columns, and slabs, and usually, are caused by strains not considered in the design.
https://www.archdaily.com/879953/what-do-the-cracks-in-concrete-structures-meanJoão Carlos Souza
The use of steel in architecture is considered as one of the most innovative construction developments in history, allowing architects to create structures in scales they never thought they could. Fast-forward a few centuries, and steel remains as one of the most crucial materials in architecture. But there is a lot more to the material than just tensile strength and durability, some architects were well-aware of steel's potential and transformed it into lighting fixtures, facades, decorative elements, and finishes.
Here are 15 projects where architects looked beyond steel as structural support and explored its diverse possibilities in architecture.
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