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Monday, February 8th, 2016

    Time Event
    12:00a
    Democracy and design

    The town of Byblos, in Lebanon, is several thousand years old. Indeed, it may be the oldest continuously inhabited place in the world. But now this ancient settlement is the site of a sleek new modernist town hall: three angular cubes linked by a glass-encased ground floor, set in a park. In a fitting match of architect and project, the building’s designer is Hashim Sarkis, dean of MIT’s School of Architecture and Planning (SA+P).

    After all, Sarkis is a historically minded modernist who has spent years examining the architecture of civic institutions — town halls, schools, and other public buildings. He studied political philosophy while getting his PhD in architecture at Harvard University. A native of Lebanon and a long-time U.S. resident, Sarkis has global interests as a scholar and practitioner.

    And as Sarkis is happy to explain, there are civic principles at work in the Byblos building.

    “What I felt in that project that we did was open the ground floor to the public completely, bringing the public through the building at the ground level so the government institutions, the local institutions are transparent,” Sarkis says. “Visual transparency does not mean political transparency, but it does aspire toward that.”

    That description also illuminates a key belief Sarkis holds: Architecture and urban design do not just reflect social values but help form them.

    “We contribute to the making of society rather than simply representing it,” says Sarkis, who was recently named by the journal DesignIntelligence as one of its 25 Most Admired Educators for 2016.

    This new house

    Sitting in his airy MIT office, Sarkis, who became dean of SA+P in January 2015, cannot remember a time when he was not hoping to be an architect.

    “I have wanted to become an architect since the age of three,” he says. Growing up in Beirut in the 1960s, he lived in a distinctive modernist home designed by the Polish architect Karol Schayer, the Lebanese architect Wassek Adib, and his father, Yousif Sarkis.

    “It’s a small, small house,” Sarkis says. “But it had … modernist optimism. I must have been fascinated by how much people were fascinated by it. And whenever I was asked, ‘What do you want to do?’ I said, ‘I want to be an architect.’”

    Beirut was then a glamorous world city — the “Paris of the Middle East,” as the saying had it — and a cultural crossroads between east and west, with co-existing Muslim and Christian communities and increasing tourism. That changed with the onset of Lebanese civil war, which lasted from 1975 until 1990 and made Beirut synonymous with destruction and strife.

    Sarkis left home to study at the Rhode Island School of Design, earning a BA in architecture and in fine arts in 1987. Then he stayed in the U.S., receiving his MA in architecture from Harvard in 1989 and his PhD in 1995.

    “In a way I became an academic because of the war,” Sarkis says. “The war kept going on. I couldn’t go back.” 

    Paid in fish

    In an unusual twist, Sarkis’ PhD studies in architecture included a minor field in political philosophy, as he studied with the likes of philosophers John Rawls and Hilary Putnam, and legal theorist Roberto Mangabeira Unger.

    “I truly feel that we cannot tell what a democracy is until we understand the social spaces in which people of a democracy gather, interact, and meet,” Sarkis says.

    Sarkis even connects the transparency of the Byblos town hall plan to the notions of idealized justice developed by Rawls, who contended that we must envision what a just society looks like even if it does not yet exist.

    “It is important for a society to appear just, to express its aspirations in some form of institutional and spatial image,” Sarkis says of the building. Still, Sarkis demurs, he is not equating his own work with that of the famous philosopher: “I would hate to say that I’m trying to bring Rawls to life. He’s a giant.”

    Sarkis has long worked in Lebanon; his initial work there, designed in 1998 and completed in 2008, was a set of apartments for fishermen in the town of Tyre.

    “My first official payment was in fish,” Sarkis recalls. “The fishermen of Tyre took me out to their restaurant.” However, he adds wryly, “How can I put it — you cannot run a practice paying your employees fish.”

    The Tyre apartment building has since gained international plaudits. The “Phaidon Atlas of 21st Century World Architecture” named it as one of the most significant buildings of the 21st century; the Boston Society of Architects gave it their Design Award in 2008; and in 2010 the Museum of Modern Art in New York selected it as one of 11 designs featured in an architectural exhibition, “Small Projects, Big Change.”

    As a practitioner, Sarkis has developed designs across a broad range of projects, including government structures, several kinds of schools, and libraries. Beyond Tyre, Sarkis has also designed multiple forms of housing, from the United Arab Emirates to the U.S.

    In the latter category, Sarkis produces modernist home designs that may themselves inspire fascination among visitors. Two of his current projects under construction in Lebanon —  apartments in the Yarzeh Hills of Beirut, and the Courtowers, houses on the Aamchit coast of Lebanon — find innovative ways of embedding homes into sloping ground while still bringing in copious amounts of light.

    Currently Hashim Sarkis Studios employs 12 people and has also finished several projects in Massachusetts. These include apartments in Boston, a private house renovation in Cambridge, and the interior of Boston a health clinic. He also redesigned Oleana, the Eastern Mediterranean-influenced restaurant annually rated as Cambridge’s best, about which Boston magazine has written that Sarkis’ back patio and glassed-in porch are “as enchanting as the food.”

    Research, research, and research

    Having maintained a flourishing academic career in addition to his architecture practice, Sarkis was a professor at Harvard’s Graduate School of Design from 1998 until January 2015. His published work includes a 2003 book about the post-war Greek architect and designer Constantinos Doxiadis, and he has co-edited a book of essays on the Catalan architect Josep Lluis Sert.

    Sarkis has three ongoing research projects. One is a book, “Beirut Normal,” which contends that Beirut’s form and architecture owes more to the standard practices of design than to its infamous strife.

    “It’s based on the idea that we can describe Beirut without talking about war and peace,” Sarkis says. “If you look at the city it follows very normal practices of urban [development] … through many of these cataclysmic moments.”

    Another project looks at the evolving form of the contemporary metropolis, contending that the traditional notion of a central city and peripheral suburbs should be altered. “We no longer go from a center to an edge” in cities, says Sarkis, especially along coasts, which “produce a very different set of hierarchies than the city and suburbs.”

    Finally, Sarkis is writing a book about how the post-war architecture of U.S. schools meshed with American civic ideals and changes in education.

    “In America, more than anywhere else, the image of a locality is focused on the school,” says Sarkis, who after surveying the U.S. has narrowed the book’s focus to a case study in Norman, Oklahoma.

    The “MIT model”

    Although Sarkis was happy at Harvard, he jumped at the chance to become dean of SA+P.

    “Harvard is an excellent school,” Sarkis says. Still, he adds, “It was a quick decision. I tend to make the more important decisions very quickly. “

    One attraction of MIT was the opportunity to lead faculty and students whose focus on research mirrors his own.

    “The MIT model itself has become really a desirable model for many professional schools in architecture and planning elsewhere,” Sarkis says. “Our students and faculty are coveted everywhere, because they do bring with them this intense research approach.”

    As dean, Sarkis expects that research focus will often be applied “to solve complex social problems. Health, environment, innovation, all of these converge on cities. We’re dealing with these not just as discrete phenomena but how they come together.”

    Or, to summarize his view about the importance of architecture, planning, and design another way, Sarkis cites the American pragmatist philosopher John Dewey.

    “Dewey’s argument about democracy was that there’s no single source from which all the answers about how we live can come,” Sarkis says. “As such, architecture is one source, and it plays a very, very important role.”

    2:59p
    Riddle of cement’s structure is finally solved

    Concrete is the world’s most widely used construction material, so abundant that its production is one of the leading sources of greenhouse gas emissions. Yet answers to some fundamental questions about the microscopic structure and behavior of this ubiquitous material have remained elusive.  

    Concrete forms through the solidification of a mixture of water, gravel, sand, and cement powder. Is the resulting glue material (known as cement hydrate, CSH) a continuous solid, like metal or stone, or is it an aggregate of small particles?

    As basic as that question is, it had never been definitively answered. In a paper published this week in the Proceedings of the National Academy of Sciences, a team of researchers at MIT, Georgetown University, and France’s CNRS (together with other universities in the U.S., France, and U.K.) say they have solved that riddle and identified key factors in the structure of CSH that could help researchers work out better formulations for producing more durable concrete.

    Roland Pellenq, a senior research scientist in MIT’s department of civil and environmental engineering, director of the MIT-CNRS lab <MSE>2 hosted by the MIT Energy Initiative, and a co-author of the new paper, says the work builds on previous research he conducted with others at the Concrete Sustainability Hub (CSHub) through a collaboration between MIT and the CNRS. “We did the first atomic-scale model” of the structure of concrete, he says, but questions still remained about the larger, mesoscale structure, on scales of a few hundred nanometers. The new work addresses some of those remaining uncertainties, he says.

    A bit of both

    One key question was whether the solidified CSH material, which is composed of particles of many different sizes, should be considered a continuous matrix or an assembly of discrete particles. The answer turned out to be that it is a bit of both — the particle distribution is such that almost every space between grains is filled by yet smaller grains, to the point that it does approximate a continuous solid. “Those grains are in a very strong interaction at the mesoscale,” he says.

    “You can always find a smaller grain to fit in between” the larger grains, Pellenq says, and thus “you can see it as a continuous material.” But the grains within the CSH “are not able to get to equilibrium,” or a state of minimum energy, over length scales involving many grains, and this makes the material vulnerable to changes over time, he says. That can lead to “creep” of the solid concrete, and eventually cracking and degradation. “So both views are correct, in some sense,” he explains.

    The analysis of the structure of hardened concrete found that pores of different sizes play important roles in determining the material’s characteristics. While smaller, nanoscale pores had been previously studied, mesoscale pores, ranging from 15 to 20 nanometers on up, had been more difficult to study and not well-characterized, Pellenq says. These pore spaces can play a major role in determining how susceptible the material is to water that can enter the material and cause cracking, eventually leading to structural failure. (This cracking, perhaps surprisingly, has nothing to do with the expansion of the water when it freezes, however).

    The new mesoscale simulations are the first that can adequately match the sometimes conflicting and confusing results seen in experiments measuring the CSH texture, Pellenq says.

    Toward better formulas

    The new simulations make it possible to match the values of key characteristics such as stiffness, elasticity, and hardness, which are seen in real concrete samples. That shows that the modeling is useful, he says, and might help guide research on developing improved formulas, for example ones that reduce the required amount of water in the initial mix with cement powder. It is the manufacturing of the cement powder, a process that requires cooking limestone (with clays) at very high temperatures, that makes concrete production one of the leading sources of human-caused greenhouse gas emissions.

    Fine-tuning the amount of water needed for a given application could also improve the material’s durability, the researchers found. The amount of water used in the original mixture can make a big difference in concrete’s longevity, even though most of that evaporates away during the setting process. While water is needed in order to make the slurry flow so that it can be poured in place, too much water leads to much bigger pore spaces and more loose, “fluffy” regions in the set concrete, the team found. Such regions might leave the material more vulnerable to later degradation, or could even be designed to improve its durability.

    “This is a quintessential step towards the provision of a seamless atom-to-structure understanding of concrete, with huge mid-term practical impact in terms of material design and optimization,” says Christian Hellmich, director of the Institute for Mechanics of Materials and Structures at the Vienna University of Technology, who was not involved in this research. He adds, “this research helps to promote concrete research as a cutting-edge scientific discipline, where the cooperation of engineers and physicists emerges as a driving force for the reunification of natural sciences across the often too-tightly set boundaries of sub-disciplines.”

    The first contributor of this work is MIT postdoc Katerina Ioannidou. The team also included other researchers at MIT; the University of California at Los Angeles; Newcastle University in the U.K.; and Sorbonne University, Aix-Marseille University, and CNRS, in France. The work was supported by Schlumberger, the French National Science Foundation (ANR) through the Labex ICoME2, and the CSHub at MIT.

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