Showing 18 results for Fadaei
Hamid Fadaei, Azita Mirzaye,
Volume 1, Issue 2 (Spesial Issue 1.2 2017)
Abstract
This study investigates and evaluates emergency conservation methods at the Chogha Zanbil archaeological site, focusing on the conservation of excavated features including shafts, shallow grids, and architectural remains. The primary objective of these interventions was to Conservation of Excavated Remains against environmental factors such as moisture, erosion, and gradual decay, either temporarily or over extended periods. The research methodology involved field observations, assessment of available materials, and reference to previous conservation practices at the site. The use of crushed gravel and sand with a variable grain size between 2 and 20 millimeters was recommended for backfilling trenches and shafts. Care was taken to avoid impurities such as gypsum, anhydrite, and various sulfates, which could contribute to the formation of soluble salts and damage the archaeological features. The protective coverage of shafts, networks, and the exposed brick platform was implemented in a phased manner, based on their depth and archaeological significance. For deeper shafts, stratified layers of gravel and soft soil with appropriate compaction were employed, while shallow grids were covered with a thin layer of gravel followed by backfilling with excavated soil. Special attention was given to the conservation of the inscribed brick platform, which was protected using a base layer of fine sand. The findings indicate that the use of natural materials combined with scientifically informed and experience-based approaches can be effective in the temporary or long-term conservation of excavated features in archaeological sites.
Parastoo Erfanmanesh, Hamid Fadaei,
Volume 1, Issue 3 (Spesial Issue 1.3 2019)
Abstract
One of the most widely used terms in the conservation and restoration of cultural and historical artifacts, particularly in the field of ancient metal objects, is patina. Although, this term is also applied to other historical materials, such as paintings and stones, its frequent used in the context of ancient bronzes makes it essential to develop a clear and accurate understanding of its meaning and implications. From the perspective of the studying deterioration of the artifacts, patina-as corrosion products in bronze artifacts-can significantly impact both the tangible and intangible aspects of the objects. on the one hand, it contributes certain values, such as age and aesthetics. On the other hand, it serves as an important criterion in conservation and restoration practices. However, the lack of comprehensive and precise definition of this term leads to complexity in conservation decision-making. In this paper, based on a literature review, the differing and similarity viewpoints on patina have been investigated. Following this, the term is reviewed in relation to different corrosion morphologies, and issue related to its current definitions are discussed. The different values of the patina are debated, and its role in the principles of conservation is reevaluated. In this field, confusion arising from the application of the term patina in the conservation of archaeological bronzes have been highlighted. Finally, considering the unique properties of corrosion phenomena in archaeological bronzes, the concept of the “original surface” is discussed as an approach to addressing this issue.
Hamid Fadaei, Majid Ayasi , Parisa Babar Shams Mogouei, Masoud Bater, Kazem Borhani-Ahang, Elahe Khakbaz Alvandian, Mohammad-Saeid Saedi , Roozbeh Shamseh, Reza Sheykh-Al-Eslami, Majid Oloumi , Mahdi Koliaei, Nahid Harati-Ardestani , Reza Hormehr , Soheila Zakavi ,
Volume 1, Issue 4 (Spesial Issue 1.4 2019)
Abstract
Archaeological excavations at the ancient site of Haft-Tepe commenced in the winter of 1965 under the direction of Dr. Negahban and continued for fourteen seasons until 1978. These excavations led to the discovery of a significant assemblage of architectural remains and diverse historical artefacts. Among the finds were various ceramic vessels and objects, a collection of clay tablets, seals and seal impressions, a range of bronze artefacts, numerous fragments of painted mud plaster, coffins, stone objects, clay busts, as well as decorative items such as necklaces, plaques, glass vessels, and bone tools. A considerable portion of these artefacts is today preserved in the Haft-Tepe Museum. In response to the quantity and importance of the discoveries, the idea of establishing a museum adjacent to the archaeological site was raised during the second season of excavations. Construction began in 1970 and, upon completion, the museum was inaugurated in the spring of 1973. With the outbreak of the Iran–Iraq War in 1980, the museum was closed; part of its prominent collection was transferred to Tehran, while other objects remained in situ. In the spring of 2001, research and conservation activities were resumed under the auspices of the Chogha Zanbil - Haft Tepe Cultural Heritage Base. One of the first major undertakings during this period was the reorganisation of the museum’s collection, carried out in collaboration with graduate students of conservation from the University of Art, Esfahan. In this process, artefacts that had previously been kept in unsuitable and scattered conditions were collected, classified, recorded, documented, and systematically arranged. This initiative laid a crucial foundation for the long-term preservation and safeguarding of the invaluable heritage of Haft-Tepe.
Hamid Fadaei, Amirhossein Karimi, Anahita Oliaei,
Volume 2, Issue 4 (ویژه نامه 2020)
Abstract
A portion of the historical documents related to the history of Haft-Tepe Museum and the general state of cultural heritage in the region is preserved within the museum building. Following the establishment of the Chogha Zanbil Cultural Heritage Research Office in the museum—which had been closed during the eight-year imposed war—the organization of the remaining research objects, as well as the old documents, became a priority. This collection primarily includes administrative letters (in Persian and English), visitor statistics, letters of introduction, old object inventories, personnel files of former staff, and registers of correspondence and attendance. The existing documents, dating from 1970 to 1981, were kept under inadequate conditions. The collection was reviewed and systematically organized in two stages during 2001 and 2003, which is the focus of the present article. These documents are significant as they reflect aspects of the museum’s history and events. Due to the fragility and deterioration of many items, they were categorized, catalogued, and initially examined before being placed in transparent plastic covers and archived in corresponding binders. Additionally, digital scanning and the recording of important correspondence were undertaken as part of the organization process. These measures have facilitated a deeper study of the museum’s past, its collections, and the status of regional cultural heritage in the years preceding the revolution and the onset of the imposed war.
Parsa Pahlavan, Hamid Fadaei, Stefania Manzi, Maria Chiara Bignozzi,
Volume 3, Issue 1 (6-2020)
Abstract
In this study, considerations for design, characterization, and in-situ application of sustainable materials for restorative use in the Pasargadae world heritage site are discussed. Based on some prior studies on sustainable waste-based restorative mortars, air lime mortars were made from lime putty, mixture of stones from the site, and additive sesame oils. The mortar samples were characterized in terms of microstructure, carbonation rate, hydric properties, and durability. The characterization aimed at compatibility assessment of mortars with a real situation. Considering the variety of natural conditions parameters compared to the laboratory, the mortar samples were also characterized in the site conditions. The results suggested the laboratory characterization, if done properly, can provide a promising degree of representation for the field conditions.
Reza Vahidzadeh, Hamid Fadaei,
Volume 3, Issue 2 (9-2020)
Abstract
The erosion of adobe heritage under the influence of natural factors, especially rainfall and humidity, is one of the most important challenges in the conservation of this heritage today. Alongside traditional options for the protection of adobe heritage, such as the use of straw plaster, in recent years, various chemical products have been marketed for the protection of building materials and components, especially against the threat of moisture, and consequently, serious tendencies have been expressed in the field of evaluating these materials in the field of conservation and restoration. Therefore, the scientific evaluation of the properties of these materials seems necessary for their judicious use. Since many of the chemical materials available in the market are mainly designed for the protection of stone and brick, it seemed necessary to conduct this study in order to protect adobe materials and optimize the penetration of these materials into the adobe texture. In this research, considering the need to increase the resistance of adobes against moisture, the hydrophobic properties of four different commercial products with the names of Stain Repellent AKEMI, SRP130, PTS+ and Long Life, were evaluated and compared with each other on the structure
of adobes. The results of the research showed that although all the commercial materials studied provide the possibility of significantly increasing the resistance of adobe against moisture, the Long-Life material has a higher ability to penetrate and hydrophobize adobes compared to other chemical products. This issue can significantly increase the surface resistance of the adobe against both long-term contact with moisture and against mechanical erosion factors. The results of this research can be used as a basis for future studies in the direction of localizing chemical materials for the protection of adobe works and optimizing their application in the conservation and restoration of adobe historical buildings.
Hamid Fadaei, Azita Mirzaye ,
Volume 3, Issue 3 (12-2020)
Abstract
The Southern Mound of Konar Sandal, situated in the Halil River basin, is one of the most significant prehistoric sites in the Jiroft plain. Among the notable discoveries at this site is a life-sized clay relief positioned within a recessed, doorway-like feature in a large room. This relief, recognized as the oldest known example of a monumental clay relief integrated with architecture in the Middle East, dates back to the third millennium BCE. Since its discovery in 2006, its conservation has posed significant challenges for experts. The history of illegal excavations in the region and the lack of adequate infrastructure for permanent protection and maintenance of the site have exacerbated these challenges, leading to occasional proposals to transfer the artifact to a museum. The primary research question focuses on identifying an appropriate approach for the on-site conservation of the clay relief. Using both library-based research and fieldwork, this study gathered information related to the site and the relief, documented environmental factors contributing to its deterioration, and analyzed the data. The findings indicate that the current protective cover is inadequate. Environmental conditions, particularly moisture rising from the soil containing soluble salts, significantly accelerate the relief's erosion and the deterioration of its surface paint layers. Based on these findings, the study provides recommendations for optimizing the conservation of the relief.
Amir Ershad Langroudi, Hamid Fadaei, Kamran Ahmadi, Monir Beheshti Far,
Volume 3, Issue 4 (3-2021)
Abstract
The reinforcement and hydrophobicity enhancement of historical construction materials, particularly the surfaces of historical stones, are among the most sensitive and challenging interventions in cultural heritage conservation. These interventions require precise analysis and comprehensive research to minimize potential side effects. Such actions are especially essential when stone artifacts exposed to open environments suffer from severe degradation and erosion or exhibit significant surface changes, potentially leading to loss of aesthetic and structural integrity. Without timely intervention, erosive factors may penetrate deeper layers of the artifact, posing a risk of complete collapse. In this study, the performance of three industrial silane/siloxane-based coatings Wacker 290, Wacker 3003, and Long Life was evaluated in the coating process of stone materials. The physical, mechanical, and especially hydrophobic properties of these materials on stone surfaces were analyzed and compared. Results indicated that all three materials exhibited moisture-repellent properties. However, Long Life and Wacker 290 demonstrated superior performance due to their better bonding with stone surfaces. These findings provide effective guidance for selecting suitable materials in conservation projects of historical artifacts, preventing the premature deterioration of these invaluable heritages.
Naser Eslami , Hamid Fadaei, Javad Abbasi ,
Volume 4, Issue 1 (10-2021)
Abstract
Soluble salts are known as serious threat for monuments and historical porous materials. The alteration mechanism related by soluble salts such as rocks is essentially a physical process based on the stress level generated by the crystallization of the salts in the pores. In recent years many ways have been developed to extract or deactivate these salts. The efficiency of every desalination system is being evaluated by the amount of extracted soluble salts and the depth of treatment in material. In fact, ionic transport is result of a consortium of energies: kinetic energy, electric energy and chemical energy. These three energies are united together to move and extraction of soluble salts in an optimum desalination system. The electro kinetic technique is a non-destructive method to extract soluble salts based on electric migration of ions inside the material. This method is even applicable for matrixes with very fine porosity and very low hydraulic permeability. In recent years this method
has been specially considered in European countries. High amount of extracted salts and deep effect on materials have been caused to happen many researches on this topic on historical heritage and considerable results have been gained. This article is a review of background, principles and generals of this method in conservation and desalination of historical porous materials which are threatened by soluble salts alteration. Results from traditional desalination ways are compared with this method as a pioneer technique show an improvement of the quality of desalination, saving time and high efficiency of this method.
Hamid Fadaei, Mohsen Charesaz,
Volume 4, Issue 2 (11-2021)
Abstract
Kahgel plaster has been a common method for protecting architectural structures at the Takht-e Soleyman World Heritage Site. Primarily applied to stone and brick structures, this plaster has proven inadequate in the site's mountainous, high-rainfall climate with sub-zero temperatures, leading to significant erosion. This study investigates the potential of replacing Kahgel plaster with traditional half-baked, half-crushed gypsum plaster as a protective coating for walls and architectural remains. The aim is to prevent moisture penetration while minimizing the new coating's own deterioration. Field research, including observation and documentation, was employed to gather data. Results indicate that the use of traditional gypsum mortar as a restoration material at the site has been successful. Derived from pounded and crushed kiln-fired gypsum stone, this mortar exhibits similar characteristics to the original mortars and offers adequate strength in the region's harsh climate. Consequently, it presents a viable sacrificial coating alternative to Kahgel plaster.
Hamid Fadaei, Ali Eghra,
Volume 4, Issue 3 (12-2021)
Abstract
The vast expanse of the Persepolis World Heritage site and its three buffer zones, along with the numerous historical remains within these boundaries—including hills, sites, and various historical mines—have presented significant challenges for the registration, documentation, monitoring, and ongoing care of these cultural assets, despite enhancing the region’s historical and cultural capacities. Although the registration and documentation of the artifacts in this area have long been a focus of the Persepolis World Heritage Site, the sheer number of artifacts has highlighted the need for more advanced documentation tools and methods. Drone-based documentation was one of the selected approaches to expand documentation activities in this area, and a three-day conference and workshop were held to discuss related topics. The most important topics discussed at the conference included: the necessity of documentation, the role of documentation in global registration processes, flight regulations and legal aspects of drone-based documentation, and case studies of using drones for studying and documenting cultural heritage. These topics were presented by 20 speakers during the scientific program of the conference. At the conclusion of the conference and workshop, a six-point declaration was prepared, with the text drafted and signed by representatives of the institutions present. This declaration emphasized the need to pay greater attention to documentation as a tool for research, understanding cultural and natural heritage, optimal presentation, and preservation.
Hamid Fadaei, Fardin Naseri,
Volume 5, Issue 1 (3-2022)
Abstract
Persepolis is one of the most prominent remaining stone sites in Iran and the world, showcasing the traditions, culture, and customs of ancient Iranians, and is notable for its structural architecture and visual beauty. The Hundred-Column Hall is the largest columned hall in Persepolis after Apadana and was magnificently adorned with a hundred tall columns. Today, mainly the bases of these columns remain in their original place in this palace. Various stone pieces belonging to other column components, such as column shafts, capitals, and floral motifs, are scattered in the open space of the main hall of the palace, exposed to natural damaging elements and thus urgently requiring conservation efforts. This study focuses on one of the column bases (Base 4D) and, through library, field, and analytical studies and the implementation of an emergency conservation plan, aims to slow the degradation pattern of this limestone base. Previously, most restorations at Persepolis were conducted using sand-cement materials, but with changing perspectives and theoretical foundations in stone conservation, cement use has been discontinued due to its different water absorption and evaporation rates, expansion and contraction coefficients, and irreversibility. XRD analyses indicate that calcium oxide is the predominant component in the samples, with traces of silicate, aluminum, and iron also present in the stone composition. Other oxides are found in minimal amounts, and the stones used are high-purity limestone with low silica content. One of the outcomes of this research is the use of hydraulic lime-based materials known as "Ledan," combined with additives and fillers, applied to deficient and actively fractured sections. This protective mortar, highly compatible with limestone, has strengthened the resistance of cracks and fractures against moisture infiltration and significantly reduced erosion rates.
Hamid Fadaei ,
Volume 5, Issue 2 (9-2022)
Abstract
The Chogha Zanbil world heritage site in Khuzestan is one of the most important Elamite sites, constructed using materials such as mud bricks and baked bricks. Today, the use of petrographic methods holds a special place in archaeometric studies of historical materials like bricks and stones. This cost-effective method allows for the extraction of valuable technical information from historical materials. The main objective of this article is to identify the mineralogical characteristics of historical brick samples from Chogha Zanbil through the microscopic examination of their thin sections. The details examined in the bricks include the types of minerals that make up the bricks, texture (including grain size and shape), porosity, types of impurities, and their distribution, all presented in detail along with relevant images. The results of the studies indicate that the apparent color of the bricks from Chogha Zanbil ranges widely from yellow, brown, and red to green. Microscopic examinations not only introduce some physical characteristics of the bricks from Chogha Zanbil but also identify the main minerals present in their structure, which include iron oxide grains, calcite, quartz, chert, gypsum, fine mica grains, and feldspar. Additionally, the conducted studies provide a clear picture of the weathering processes affecting the bricks, particularly under the influence of soluble salts.
Mostafa Rakhshandehkhoo, Hamid Fadaei, Masoud Ansari, Leila Razavi,
Volume 6, Issue 1 (6-2023)
Abstract
The Sassanian bas-reliefs are among the most significant historical artifacts of ancient Iran, primarily found in the province of Fars. Approximately 30 Sassanian bas-reliefs exist in Fars, depicting scenes related to power demonstrations, court proceedings, and battles or hunting scenes. Unfortunately, many of these bas-reliefs have suffered damage over the years due to their outdoor exposure and the impact of climatic conditions. Depending on the type of stone and their geographical location, they have been gradually eroded. Given their historical importance for Iran's cultural heritage, a comprehensive program involving study, documentation, conservation planning, and restoration is crucial. The Naqsh-e Rostam Relief Complex houses more than 11 bas-reliefs and numerous inscriptions, all situated in open-air environments and vulnerable to environmental factors such as rain, wind, and temperature fluctuations. These elements have contributed to the gradual deterioration of these ancient artworks. The central question addressed by this article pertains to the process of studying, assessing damage, documenting, and planning the conservation of a rock relief. To answer this, a combination of field and laboratory methods has been employed, including petrography, X-ray diffraction (XRD), and X-ray fluorescence (XRF). The results indicate both physical and chemical weathering in the limestone structure, leading to various forms of damage such as erosion, flaking, cracking, and breakage. Therefore, protective and conservation measures for these prominent bas-reliefs should focus on strengthening and preserving their surfaces against deteriorating agents.
Anisa Shiri , Hamid Fadaei, Leila Razavi, Mostafa Rakhshandehkhoo, Mohammad Reza Alikhah, Zeinab Mohtasham,
Volume 6, Issue 4 (3-2024)
Abstract
Stone structures are susceptible to weathering and erosion over time, necessitating the identification and elimination of damaging factors to ensure their preservation. This research focused on diagnosing the damage to the tomb of Xerxes located at the historical site of Naqsh-e Rostam through a multidisciplinary approach encompassing library research, field observations, laboratory analyses, and geological studies. Petrographic studies revealed that the rocks comprising the tomb belong to the Seruk Formation. The sedimentary sequence within this formation exhibited thick and light-colored limestone layers. Utilizing the geophysical technique of Ground Penetrating Radar (GPR), two major fractures were identified along the boundaries of the tomb. These fractures predominantly followed north-south and east-west orientations. The intersection of these fracture sets, combined with the layering surfaces, resulted in the development of dissolution phenomena, leading to the formation of dissolution holes and cavernous porosity on the structure. Additionally, field studies investigated the presence of plants and cyanobacterial lichens on the tomb.
Hamid Fadaei,
Volume 7, Issue 2 (9-2024)
Abstract
Although documentation in the field of cultural heritage plays a pivotal role in the preservation, management, and transmission of knowledge related to tangible and intangible assets, such processes, as a key tool for identifying, evaluating, and recording various cultural and historical features and values, have received limited attention in various international instruments (such as charters, conventions, regulations, and recommendations). The lack of systematic documentation and recording of cultural heritage and the loss of data not only lead to irreparable damage to cultural heritage knowledge but also create challenges for conservation, restoration, and education processes. Therefore, this article seeks to clarify the position of cultural heritage documentation in the aforementioned instruments and to examine its tools and methods. However, the utilization of these frameworks at the national and local levels often faces challenges, including the absence of localized execution standards, a shortage of expertise in employing advanced technologies, and insufficient financial and educational resources. Methodologically, this article is based on a systematic analysis of international instruments related to cultural heritage. By employing a qualitative content analysis approach, it examines the position and emphasis of documentation within these instruments, along with its methods and tools. For greater accuracy, a correlation between key concepts and theoretical frameworks associated with cultural heritage conservation was established. The research findings indicate that, in general, international instruments emphasize the importance and necessity of documentation as a fundamental pillar for the proper preservation and management of cultural heritage. Such efforts enhance transparency in conservation activities and facilitate international cooperation, particularly in cases where cultural properties are threatened by natural or human factors. Some of these instruments highlight documentation as an integral part of education and research in the field of cultural heritage, considering it a means to transfer knowledge and experiences to future generations. This process, by providing comprehensive and accurate information, plays a vital role in preserving the authenticity, values, and sustainability of cultural properties at a global level and contributes to decision-making and policymaking related to cultural heritage.
Mohammad Reza Rokni, Hamid Fadaei , Marjan Keyfargir ,
Volume 7, Issue 2 (9-2024)
Abstract
Persepolis, as one of Iran's most prominent archaeological sites, symbolizes the grandeur of the Achaemenid Empire's culture and art. The stone carving art and architectural ornaments of this era, drawing from the experiences and knowledge of various cultures, created a novel and artistic style that is evident in the stone reliefs of Persepolis. Due to the delicacy and precision of these reliefs, they have attracted the attention of many researchers, raising questions about their artistic values and execution methods. This study aims to analyze the execution techniques of Persepolis' reliefs by documenting examples of these reliefs on the eastern staircase of Apadana Palace and the northern staircase of the Treasury Palace. To document and create 3D models of the reliefs, advanced photogrammetry methods, with a particular emphasis on photo-scanning technology, were employed. Images were processed using specialized software such as Agisoft, 3D Zephyr, and Reality Capture. The results of this study reveal a part of the creation process of these artworks that has been less explored until now. Furthermore, the effectiveness of the photogrammetry-based documentation method in extracting precise technical and artistic data is confirmed. This method not only enables a more detailed analysis of the reliefs' intricacies and geometric proportions but also contributes to a deeper understanding of their artistic values and their place in the history of art. This approach can serve as a valuable model for future research in the field of documenting and extracting technical and artistic data from historical stone reliefs.
Hamid Fadaei,
Volume 7, Issue 4 (2-2025)
Abstract
Air pollution is one of the major challenges of modern life, exacerbating environmental crises, particularly in developing countries, and posing a serious threat to cultural heritage. Marvdasht, due to its ongoing development, is among the regions facing this issue. The presence of numerous historical sites registered on national and world heritage lists has made the impact of air pollution—especially considering the region's industrial expansion—a significant concern for cultural heritage specialists. This concern is further amplified by the presence of limestone-based stone heritage sites, such as the UNESCO-listed Persepolis and the Naqsh-e Rostam historical complex. These monuments, composed primarily of calcite, are highly susceptible to direct and indirect erosion and degradation caused by acid rain. This research aims to identify the sources of air pollutants in the region and assess their impact on the erosion of cultural heritage and stone monuments. Through a review of theoretical sources, field investigations, and laboratory analyses, the major sources of air pollution in the Marvdasht plain were identified and evaluated. The collected data were analyzed using qualitative and quantitative methods. To measure the impact of air pollution, air samples were collected from Persepolis and Naqsh-e Rostam as key stone heritage sites, as well as from the Marvdasht Petrochemical Complex, the primary pollution source in the area. The concentrations of NO₂, SO₂, O₃, and NH₃ in the air samples were measured using ion chromatography and stoichiometric calculations. The findings of this study indicate a high potential for pollutant-induced damage in the region.
