خشت

از ویکی‌پدیا، دانشنامهٔ آزاد
پرش به ناوبری پرش به جستجو
فارسیEnglish

خشت یکی از مصالح ساختمانی است. خشت معمولاً به اشکال و ضخامت‌های مختلف می‌تواند تولید شود ولی مرسوم‌ترین آن شکل مربع به ضلع ۲۰ سانتیمتر و به ضخامت ۵ سانتی‌متر است. به نصف یک خشت یک‌نیمه گفته می‌شود.

تولید[ویرایش]

برای تولید خشت ابتدا گل را در قالب می‌ریزند. سپس در آفتاب خشک می‌کنند. به این خشت، خشت خام گفته می‌شود. خشت خام در برابر رطوبت از بین می‌رود به همین خاطر خشت را می‌پزند که در این صورت به آن آجر گفته می‌شود. فرایند پختن خشت در کوره آجرپزی که بدان داش گفته می‌شود انجام می‌شود

وی‍ژگیهای خشت و انواع آن[ویرایش]

خشت از نظر اقتصادی به صرفه بوده و به راحتی از خاک محل در ابعاد معمولی تهیه می‌شود و پس از خشک شدن به مصرف بنا می‌رسد. خشت به طریق گوناگون تهیه شده که به شرح ان می‌پردازیم.

۱ـ خشت خوب از تنگ بستن خاک رس همگن با آب و پس از ورز دادن در ابعاد معمول قالب زده می‌شود.

۲ـ خاک رس معدنی نرم شده با شکر سنگ و آب مخلوط شده خشت تهیه می‌شود.

۳ـ خاک رس مرغوب با کاه و خرده سنگ تهیه می‌شود. وجود کاه باعث اتصال دانه‌های خاک به یکدیگر شده و خرده سنگ مقاومت خشت را زیاد می‌کند تا خشت در زیر بارهای فشاری بنا تاب فشاری بیشتر را تحمل کند.

۴ـ چنانچه خاک‌های آوار مرغوب از ساختمان‌های تخریب شده به دست اید می‌توان از آن‌ها که دارای درشت‌دانه و ریزدانه‌های سنگی است خشت مقاومی تهیه کرد.

۵ـ خاک رس چرب کوبیده با مقداری خاکستر مخلوط شده و از ان خشت تهیه می‌گردد. معمولاً خاکستر دارای چربی نا چیزی می‌باشد که وجود ان در خشت حالت عدم مکش آب را به وجود می‌آورد. رنگ این خشت خاکستری می‌باشد.

۶ـ به مخلوط خاک رس موی بز اضافه شده و خشتی مقاوم به دست می آید که ترک‌پذیری ان بسیار کم و در مواردی از بین می‌رود.

۷ـ خاک رس معدنی نرم با پشم شتر که به صورت تار و پود درهم آمیخته شده به نسبت معلوم مخلوط شده و خشت تهیه می‌گردد.

۸ـ در مواردی پوست برنج شلتوک با خاک رس مخلوط شده و اتصال خوبی در خشت به وجود می آید و ترک‌پذیری خشت را نقصان می‌دهد.

۹ـ در مواردی به خاک رس پهن چارپایان اضافه می‌کنند. این ترکیب نیز باعث مقاومت خشت در برابر رطوبت می‌شود و از بازشدن ان جلوگیری می‌کند.

۱۰ـ ریشه گیاهی و علفی برخی از گیاهان با خاک رس مخلوط شده و خشت تهیه می‌شود.

۱۱ـ خاک رس با الیا ف درخت خرما در اندازه لازم مخلوط شده و خشتی مقاوم تهیه می‌شود. به این خشت اصطلاحاً ساز و دار گفته می‌شود.

۱۲ـ در مواردی از خرد کردن کلوش ساقه‌های برنج و مخلوط کردن ان با خاک خشت مقاوم و با پیوند ملات از خشت به وجود می آید.

قابل توجه است که در بین خشتهای ذکر شده به میزان همگن بودن مواد ترکیبی در آن‌ها و حرکت‌پذیری یکنواخت و غیر یکنواخت یعنی انبساط و انقباض در مقابل گرما و سرما و عوامل طبیعی برخی مقاوم و پایدار بوده و برخی نا پایدار می‌باشد که بنا به نوع هوا و اقلیم مکان و حجم ساختمان از آن‌ها استفاده می‌گردد.[۱][۲]

محاسن بناهای خشتی[ویرایش]

  1. خشت و ملات آن اکثراً خاک رس یا ملات خاکی بوده که مخلوطی از خاک و ماسه می‌باشد که با خشت پیوند جالبی به وجود می‌آورد. اگر گرد و غبار نشسته بر سطوح خشت کاملاً گرفته شود و در موقع کار با پارچه خیس کف مال و مرطوب گردد، سپس با ملات ورزیده با ضربه زدن به کار رود، اسکلت خشتی به صورت قامتی یکپارچه به وجود می‌آید. به علت ترکیب اجزا و ضخامت دیوارهای خشتی بنا دارای مقاومتی ویژه می‌گردد؛ که اتکا و درگیری عضوها در یکدیگر موجب می‌شود که این‌گونه بناها تا حدی در برابر زلزله‌های خفیف مقاوم باشد.
  2. از وجود خشت بیشتر در مناطق گرمسیری و کویری استفاده می‌گردد و به علت عدم رطوبت در زمین‌های خشک، بناهای خشتی نزدیک به هزار سال با قامتی استوار پای بر جا مانده‌است. چنانچه خواسته شود از خشت جهت اقلیم‌های معتدل استفاده شود، حتماً بایستی ریشه و پی سنگی و آزاره سازی آن به شکل کرسی چینی تا ارتفاع یک متر از سنگ و ملات ماسه آهک که در مقابل رطوبت مقاوم می‌باشد استفاده گردد. چنانچه سطح تمام شده کرسی چینی با پستی و بلندی‌هایی ساخته شود، سبب درگیری رج‌های خشتی با کرسی‌های سنگی می‌گردد. قابل توجه خواهد بود اگر در رج انتهایی کرسی چینی، سنگ‌های عمودی به شکل منفرد و بلند به صورت میخ دوبل به کار رود یا از تنه درخت‌های مقاوم که اندود قیری شده باشد جهت «دوبل» کرسی چینی و اسکلت خشتی استفاده کرده اتصال و پیوند خوبی در مقابل حرکات زمین و زلزله‌های خفیف ایفا می‌شود.
  3. به علت قطور بودن دیوارها و در مواردی پوشش‌های آن‌ها عایق حرارتی و برودتی به وجود می‌آید. از این رو استفاده از خشت در اقلیم‌های گرم و کویری مورد توجه می‌باشد و به همین علت است که زندگی طاقت فرسا را در تابستان‌های گرم و زمستان‌های خشک و سرد ممکن می‌سازد. قابل توجه می‌باشد که مصالح امروزی هرگز نتوانسته‌است مشکل گرما و سرمای کویر را حل کرده و جایگزین خشت گردد.

معایب بناهای خشتی[ویرایش]

  1. به‌طوری‌که مسلم است پوشش‌های خارجی در بناهای خشتی نمی‌تواند بدون اندود و روکش باشد. چنانچه بنایی بدون اندود بوده باشد اثر رطوبت هوا و بارش‌های زمستانی یا در فصول دیگر سال بر قامت و اسکلت بنا بسیار سریع اثرگذارده، دانه‌های خاک را مرطوب و متورم ساخته و از یکدیگر باز می‌کند و باعث از بین رفتن پیوندهای اجزا می‌شود. با گذشت زمان کوتاهی کلاف‌های بنا در هم ریخته و بنا تخریب می‌گردد. از این رو انواع اندودها و روکش‌ها باعث محافظت بنا شده که آثاری چون ارگ بم را قرن‌ها نگهداری کرده‌است.
  2. وجود رطوبت :به‌طوری‌که قبلاً اشاره شد در مکان‌های مرطوب به سرعت رطوبت از طرف دیوارها به بالا سرایت می‌کند و باعث فرسودگی بنا می‌گردد. عدم توجه به این اصل در بناهای خشتی جبران‌ناپذیر است که بایستی با توجه به روکش کرسی چینی و عایق‌بندی ساختمان بتاهای خشتی را بنا کرد.
  3. ترک‌ها:در اثر نفوذ آب باران و برف و حرکات خفیف در بناهای خشتی در نواحی ختم بنا و پشت بام یا در قسمت‌های دیگر خارجی ترک‌های بزرگ و کوچک به وجود آمده که درز آن‌ها کاملاً باز شده و با مصالح مقاوم ترک‌گیری می‌شود. در بعضی موارد مسیر ترک‌ها، تموشه‌گذاری می‌شود و این عمل حالت ناودانی را انجام می‌دهد.
  4. عدم کلاف بندی بین دیوارهای جدا شونده در محل نعل درگاه‌ها
  5. در پوشش‌های کروی فشار طاق بیشتر در تقاطع دیوارها می‌باشد. به علت عدم اتصالات این طاق‌ها و طاق‌های گهواره‌ای با دیوارها پیوندی به شکل دوبل نداشته و در مقابل حرکات شدید زمین مقاومت چندانی ندارد.[۳]

نگارخانه[ویرایش]

جستارهای وابسته[ویرایش]

منابع[ویرایش]

  1. زمرشیدی، حسین (۱۳۹۰). مصالح‌شناسی سنتی. زمرد.
  2. کباری، سیاوش (۱۳۹۱). مصالح‌شناسی. دانش و فن.
  3. معماری ایرن. اجرای ساختمان با مصالح سنتی|حسین زمرشیدی

Adobe wall (detail) in Bahillo, Palencia, Spain
Renewal of the surface coating of an adobe wall in Chamisal, New Mexico
Shiraz, Iran. Its urban gardens are separated by adobe walls.

Adobe (/əˈdbi/ (About this soundlisten);[1] Spanish pronunciation: [aˈðoβe]) (Arabic: الطوب‎, romanizedaṭ-ṭūb[2]) is a building material made from earth and organic materials. Adobe is Spanish for mudbrick, but in some English-speaking regions of Spanish heritage, the term is used to refer to any kind of earth construction. Most adobe buildings are similar in appearance to cob and rammed earth buildings. Adobe is among the earliest building materials, and is used throughout the world.

Description

Adobe bricks are rectangular prisms small enough that they can quickly air dry individually without cracking. They can be subsequently assembled, with the application of adobe mud to bond the individual bricks into a structure. There is no standard size, with substantial variations over the years and in different regions. In some areas a popular size measured 8 by 4 by 12 inches (20 cm × 10 cm × 30 cm) weighing about 25 pounds (11 kg); in other contexts the size is 10 by 4 by 14 inches (25 cm × 10 cm × 36 cm) weighing about 35 pounds (16 kg). The maximum sizes can reach up to 100 pounds (45 kg); above this weight it becomes difficult to move the pieces, and it is preferred to ram the mud in situ, resulting in a different typology known as rammed earth.

Strength

In dry climates, adobe structures are extremely durable, and account for some of the oldest existing buildings in the world. Adobe buildings offer significant advantages due to their greater thermal mass, but they are known to be particularly susceptible to earthquake damage if they are not reinforced.[3][4] Cases where adobe structures were widely damaged during earthquakes include the 1976 Guatemala earthquake, the 2003 Bam earthquake, and the 2010 Chile earthquake.

Distribution

Buildings made of sun-dried earth are common throughout the world (Middle East, Western Asia, North Africa, West Africa, South America, southwestern North America, Spain, and Eastern Europe.)[5] Adobe had been in use by indigenous peoples of the Americas in the Southwestern United States, Mesoamerica, and the Andes for several thousand years.[6] Puebloan peoples built their adobe structures with handsful or basketsful of adobe, until the Spanish introduced them to making bricks. Adobe bricks were used in Spain from the Late Bronze and Iron Ages (eighth century BCE onwards).[7] Its wide use can be attributed to its simplicity of design and manufacture, and economics.[8]

A distinction is sometimes made between the smaller adobes, which are about the size of ordinary baked bricks, and the larger adobines, some of which may be one to two yards (1–2 m) long.

Etymology

The word adobe /əˈdb/ has existed for around 4000 years with relatively little change in either pronunciation or meaning. The word can be traced from the Middle Egyptian (c. 2000 BC) word ɟbt "mud brick". Middle Egyptian evolved into Late Egyptian, Demotic or "pre-Coptic", and finally to Coptic (c. 600 BC), where it appeared as τωωβε tōʾpə. This was adopted into Arabic as الطوب aṭ-ṭawbu or aṭ-ṭūbu, with the definite article al- attached.[9] tuba,[10][11] This was assimilated into the Old Spanish language as adobe [aˈdobe], probably via Mozarabic. English borrowed the word from Spanish in the early 18th century, still referring to mudbrick construction.

In more modern English usage, the term "adobe" has come to include a style of architecture popular in the desert climates of North America, especially in New Mexico, regardless of the construction method.

Composition

Adobe style in Santa Fe, New Mexico

An adobe brick is a composite material made of earth mixed with water and an organic material such as straw or dung. The soil composition typically contains sand, silt and clay. Straw is useful in binding the brick together and allowing the brick to dry evenly, thereby preventing cracking due to uneven shrinkage rates through the brick.[12] Dung offers the same advantage. The most desirable soil texture for producing the mud of adobe is 15% clay, 10–30% silt, and 55–75% fine sand.[13] Another source quotes 15–25% clay and the remainder sand and coarser particles up to cobbles 50 to 250 mm (2 to 10 in), with no deleterious effect. Modern adobe is stabilized with either emulsified asphalt or Portland cement up to 10% by weight.

No more than half the clay content should be expansive clays, with the remainder non-expansive illite or kaolinite. Too much expansive clay results in uneven drying through the brick, resulting in cracking, while too much kaolinite will make a weak brick. Typically the soils of the Southwest United States, where such construction has been widely used, are an adequate composition.[14]

Material properties

The Great Mosque of Djenné, Mali, is built in adobe. The struts projecting from the wall serve as decoration, as well as supports for scaffolding during maintenance.

Adobe walls are load bearing, i.e. they carry their own weight into the foundation rather than by another structure, hence the adobe must have sufficient compressive strength. In the United States, most building codes[15] call for a minimum compressive strength of 300 lbf/in2 (2.07 newton/mm2) for the adobe block. Adobe construction should be designed so as to avoid lateral structural loads that would cause bending loads. The building codes require the building sustain a 1 g lateral acceleration earthquake load. Such an acceleration will cause lateral loads on the walls, resulting in shear and bending and inducing tensile stresses. To withstand such loads, the codes typically call for a tensile modulus of rupture strength of at least 50 lbf/in2 (0.345 newton/mm2) for the finished block.

In addition to being an inexpensive material with a small resource cost, adobe can serve as a significant heat reservoir due to the thermal properties inherent in the massive walls typical in adobe construction. In climates typified by hot days and cool nights, the high thermal mass of adobe mediates the high and low temperatures of the day, moderating the temperature of the living space. The massive walls require a large and relatively long input of heat from the sun (radiation) and from the surrounding air (convection) before they warm through to the interior. After the sun sets and the temperature drops, the warm wall will continue to transfer heat to the interior for several hours due to the time-lag effect. Thus, a well-planned adobe wall of the appropriate thickness is very effective at controlling inside temperature through the wide daily fluctuations typical of desert climates, a factor which has contributed to its longevity as a building material.

Thermodynamic material properties are sparsely quoted. The thermal resistance of adobe is quoted as having an R-value of R0 = 0.41 h ft2 °F/(Btu in)[16] and a conductivity of 0.57 W/(m K) quoted from another source.[17] A third source provides the following properties: conductivity=0.30 Btu/(h ft °F); heat capacity=0.24 Btu/(lb °F); density=106 lb/ft3 (1700 kg/m3).[18] To determine the total R-value of a wall for example, multiply R0 by the thickness of the wall. From knowledge of the adobe density, heat capacity and a diffusivity value, the conductivity is found to be k = 0.20 Btu/(h ft °F) or 0.35 W/(m K). The heat capacity is commonly quoted as cp = 0.20 Btu/(lb F) or 840 joules/(kg K).[19] The density is 95 lb/ft3 or 1520 kg/m3. The thermal diffusivity is calculated to be 0.0105 ft2/h or 2.72x10−7 m2/s.

Uses

Poured and puddled adobe walls

Cliff dwellings of poured or puddled adobe (cob) at Cuarenta Casas in Mexico

Poured and puddled adobe (puddled clay, piled earth), today called cob, is made by placing soft adobe in layers, rather than by making individual dried bricks or using a form. "Puddle" is a general term for a clay or clay and sand-based material worked into a dense, plastic state.[20] These are the oldest methods of building with adobe in the Americas until holes in the ground were used as forms, and later wooden forms used to make individual bricks were introduced by the Spanish.[21]

Adobe bricks

Adobe bricks near a construction site in Milyanfan, Kyrgyzstan

Bricks made from adobe are usually made by pressing the mud mixture into an open timber frame. In North America, the brick is typically about 25 by 36 cm (10 by 14 in) in size. The mixture is molded into the frame, which is removed after initial setting. After drying for a few hours, the bricks are turned on edge to finish drying. Slow drying in shade reduces cracking.

The same mixture, without straw, is used to make mortar and often plaster on interior and exterior walls. Some cultures used lime-based cement for the plaster to protect against rain damage.[citation needed]

Depending on the form into which the mixture is pressed, adobe can encompass nearly any shape or size, provided drying is even and the mixture includes reinforcement for larger bricks. Reinforcement can include manure, straw, cement, rebar or wooden posts. Straw, cement, or manure added to a standard adobe mixture can produce a stronger, more crack-resistant brick.[22] A test is done on the soil content first. To do so, a sample of the soil is mixed into a clear container with some water, creating an almost completely saturated liquid. The container is shaken vigorously for one minute. It is then allowed to settle for a day until the soil has settled into layers. Heavier particles settle out first, sand above, silt above that and very fine clay and organic matter will stay in suspension for days. After the water has cleared, percentages of the various particles can be determined. Fifty to 60 percent sand and 35 to 40 percent clay will yield strong bricks. The Cooperative State Research, Education, and Extension Service at New Mexico State University recommends a mix of not more than 1/3 clay, not less than 1/2 sand, and never more than 1/3 silt.

Adobe wall construction

The earthen plaster removed, exposing the adobe bricks at Fort St. Sebastian in France

The ground supporting an adobe structure should be compressed, as the weight of adobe wall is significant and foundation settling may cause cracking of the wall. Footing depth is to below the ground frost level. The footing and stem wall are commonly 24 and 14 inches thick, respectively. Modern construction codes call for the use of reinforcing steel in the footing and stem wall. Adobe bricks are laid by course. Adobe walls usually never rise above two stories as they are load bearing and adobe has low structural strength. When creating window and door openings, a lintel is placed on top of the opening to support the bricks above. Atop the last courses of brick, bond beams made of heavy wood beams or modern reinforced concrete are laid to provide a horizontal bearing plate for the roof beams and to redistribute lateral earthquake loads to shear walls more able to carry the forces. To protect the interior and exterior adobe walls, finishes such as mud plaster, whitewash or stucco can be applied. These protect the adobe wall from water damage, but need to be reapplied periodically. Alternatively, the walls can be finished with other nontraditional plasters that provide longer protection. Bricks made with stabilized adobe generally do not need protection of plasters.

Adobe roof

The traditional adobe roof has been constructed using a mixture of soil/clay, water, sand and organic materials. The mixture was then formed and pressed into wood forms, producing rows of dried earth bricks that would then be laid across a support structure of wood and plastered into place with more adobe.

Depending on the materials available, a roof may be assembled using wood or metal beams to create a framework to begin layering adobe bricks. Depending on the thickness of the adobe bricks, the framework has been preformed using a steel framing and a layering of a metal fencing or wiring over the framework to allow an even load as masses of adobe are spread across the metal fencing like cob and allowed to air dry accordingly. This method was demonstrated with an adobe blend heavily impregnated with cement to allow even drying and prevent cracking.

The more traditional flat adobe roofs are functional only in dry climates that are not exposed to snow loads. The heaviest wooden beams, called vigas, lie atop the wall. Across the vigas lie smaller members called latillas[23] and upon those brush is then laid. Finally, the adobe layer is applied.

To construct a flat adobe roof, beams of wood were laid to span the building, the ends of which were attached to the tops of the walls. Once the vigas, latillas and brush are laid, adobe bricks are placed. An adobe roof is often laid with bricks slightly larger in width to ensure a greater expanse is covered when placing the bricks onto the roof. Following each individual brick should be a layer of adobe mortar, recommended to be at least 25 mm (1 in) thick to make certain there is ample strength between the brick's edges and also to provide a relative moisture barrier during rain.[24]

Roof design evolved around 1850 in the American Southwest. Three inches of adobe mud was applied on top of the latillas, then 18 inches of dry adobe dirt applied to the roof. The dirt was contoured into a low slope to a downspout aka a 'canal'. When moisture was applied to the roof the clay particles expanded to create a waterproof membrane. Once a year it was necessary to pull the weeds from the roof and re-slope the dirt as needed.[citation needed]

Depending on the materials, adobe roofs can be inherently fire-proof. The construction of a chimney can greatly influence the construction of the roof supports, creating an extra need for care in choosing the materials. The builders can make an adobe chimney by stacking simple adobe bricks in a similar fashion as the surrounding walls.

In 1927, the Uniform Building Code (UBC) was adopted in the United States. Local ordinances, referencing the UBC added requirements to building with adobe. These included: restriction of building height of adobe structures to 1-story, requirements for adobe mix (compressive and shear strength) and new requirements which stated that every building shall be designed to withstand seismic activity, specifically lateral forces. By the 1980s however, seismic related changes in the California Building Code effectively ended solid wall adobe construction in California; however Post-and-Beam adobe and veneers are still being used.

Adobe around the world

The largest structure ever made from adobe is the Arg-é Bam built by the Achaemenid Empire. Other large adobe structures are the Huaca del Sol in Peru, with 100 million signed bricks and the ciudellas of Chan Chan and Tambo Colorado, both in Peru.

The citadel of Bam, Iran, or Arg-é Bam, in Kerman Province, Iran: The world's largest adobe structure, dating to at least 500 BC

See also

References

  1. ^ definition of adobe from Oxford Dictionaries Online. Retrieved 25 December 2010.
  2. ^ "the definition of adobe". www.dictionary.com. Retrieved 30 September 2018.
  3. ^ Short documentary about adobe preparation and 2010 Chile earthquake Livingatlaschile.com, FICh, retrieved 5 March 2014
  4. ^ Collyns, Dan (15 August 2009). "Peru rebuilds two years on from quake". news.bbc.co.uk. Archived from the original on 15 August 2009. Retrieved 24 August 2009. the 1976 Guatemala earthquake the 2003 Bam earthquake
  5. ^ Marchand, Trevor (2009). The Masons of Djenne. Bloomington: University of Indiana Press
  6. ^ Beck, Roger B.; Linda Black; Larry S. Krieger; Phillip C. Naylor; Dahia Ibo Shabaka (1999). World History: Patterns of Interaction. Evanston, IL: McDougal Littell. ISBN 978-0-395-87274-1.
  7. ^ de Chazelles-Gazzal, Claire-Anne (1997). Les maisons en terre de la Gaule méridionale. Montagnac, France: Éditions Monique Mergoil. pp. 49–57.
  8. ^ Rose, William I.; Julian J. Bommer (2004). Natural hazards in El Salvador. Geological Society of America. p. 299. ISBN 978-0-8137-2375-4.
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  10. ^ Spanish Word Histories and Mysteries: English Words that Come from Spanish, Houghton Mifflin Co., 2007, p.5
  11. ^ "Adobe Moulding" Auroville Earth Institute
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  13. ^ Garrison, James. "Adobe-The Material, Its Deterioration, Its Coatings" (PDF). pp. 5–16. Retrieved 27 February 2013.
  14. ^ Austin, George. "Adobe as a building material" (PDF). New Mexico Geology, November 1984. New Mexico Bureau of Mines and Mineral Resources. p. 70. Archived from the original (PDF) on 2 December 2013. Retrieved 27 February 2013.
  15. ^ "14.7.4 NMAC" (PDF). Archived from the original (PDF) on 18 August 2013. Retrieved 25 June 2013.
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  17. ^ Chávez-Galán, Jesus; Almanza, Rafael; Rodríguez, Neftali (2008). "Experimental Measurments [sic?] of Thermal Properties for Mexican Building Materials to Simulate Thermal Behavior to Save Energy". Experimental Measurements of Thermal Properties for Mexican Building Materials to Simulate Thermal Behavior to Save Energy. Spriner. pp. 496–501. doi:10.1007/978-3-540-75997-3_89. ISBN 978-3-540-75996-6.
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External links

  • Building With Awareness – a detailed how-to DVD video that shows adobe wall construction and their use as thermal mass walls
  • Cal-Earth (The California Institute of Earth Art and Architecture) has developed a patented system called Superadobe, in which bags filled with stabilized earth are layered with strands of barbed wire to form a structure strong enough to withstand earthquakes, fire and flood.
  • Earth Architecture – a website whose focus is contemporary issues in earth architecture.
  • Earth Architecture and Conservation in East Anglia – British organisation that focuses on the proper maintenance and conservation of earth buildings in a region of the UK that has a long history of building with mud
  • Kerpic.org – a website on earthen architecture researches stabilized with gypsum
  • Kleiwerks – international organization recognized for their unique contribution to modern earthen and natural building techniques throughout the world. Their focus is on education through hands-on experience. Experienced experts are contactable and there are regular demonstrations in the area.
  • Valle de Sensaciones – artistic construction with adobe, experimental ground and theme park for creative living close to nature
  • World Monuments Fund – Adobe Missions of New Mexico – description of a project of the World Monuments Fund for the preservation of adobe churches in New Mexico, United States