Search Results (16)

The challenges highlighted at the 29th Conference of the Parties (COP29) emphasize the importance of using renewable resources in the architecture, engineering, and construction (AEC) industry. The building and construction sector is a major contributor to environmental pollution, with most emissions stemming from the extraction, transportation, production, and disposal of construction materials. As a result, developing renewable building materials is essential. In the past decade, bamboo has gained significant attention from researchers due to its strength, sustainability, high yield, and rapid growth. Bamboo in its original form has been used in construction for centuries, and recent innovations have led to the creation of engineered bamboo materials designed for more versatile applications. Researchers have been focused on understanding the physical and mechanical properties of engineered bamboo to assess its potential as a sustainable alternative to traditional building materials. However, modern practitioners are still unfamiliar with engineered bamboo materials, their types, and where they can be used. This article highlights the most widely researched engineered bamboo materials that have been used in the construction of small architectural forms and bigger structures. It provides an overview of common engineered bamboo building materials, namely laminated bamboo lumber, laminated bamboo sheets, parallel strand bamboo, bamboo mat boards, and bamboo particleboards, and their manufacturing processes and applications, offering valuable information for current practitioners and future research. Full article

The synergistic application of ultra-high-performance concrete (UHPC) and bamboo scrimber provides innovative solutions for sustainable structural engineering. In this study, the structural response mechanism of the combined beams under the steel plate–screw composite connection system was systematically investigated by designing three shear connection gradient specimens (TS200/300/400) to address the key scientific issues of the mechanical behavior of the bamboo–UHPC interface. Based on the unidirectional compression tests of bamboo–UHPC composite shear connections and four-point bending tests of composite beams, the damage modes, load-mid-span deflection relationship, bending stiffness, bamboo–UHPC slip and normal lift were evaluated for all the composite beams with the shear connection gradient as a parameter. The results showed that the flexural performance of the composite beams went through three stages: elastic behavior, damage development and final damage. The interfacial slip and interfacial lift-off have more obvious asymmetric spatial distribution characteristics, and increasing the shear joint degree can delay the separation between the UHPC and the bamboo layer, thus enhancing the structural integrity. Typical features of the final damage are the bending damage of ultra-high-performance concrete and bamboo fiber damage. This study highlights the potential of UHPC–bamboo composite beams for sustainable construction and emphasizes the importance of optimizing shear connection for improved performance. Full article

This study evaluates the carbon footprint of three bio-concrete families—wood (WBC), bamboo (BBC), and rice husk (RHBC)—and their application in wall components (as blocks and as boards). A cradle-to-grave, carbon-focused Life Cycle Assessment (LCA) was used to compare these bio-concretes to conventional masonry and industrialized light-framing solutions. Each bio-concrete family incorporated biomass volumetric fractions of 40%, 45%, and 50%, using a ternary cementitious matrix of cement, rice husk ash, and fly ash (0.45:0.25:0.30). Sensitivity analyses examined the impacts of transport distances and the parameters affecting biogenic carbon storage, such as carbon retention periods in the built environment. The carbon footprint results demonstrated a significantly low or negative balance of emissions: WBC ranged from −109 to 31 kgCO₂-eq./m³, BBC from −113 to 28 kgCO₂-eq./m³, and RHBC from 57 to 165 kgCO₂-eq./m³. The findings emphasized the importance of ensuring bio-concrete durability to maximize biogenic carbon storage and highlighted the environmental advantages of bio-concrete wall systems compared to conventional solutions. For instance, BBC boards replacing fiber cement boards in light-framing systems achieved a 62 kgCO₂-eq./m² reduction, primarily due to the production (A1–A3) and replacement (B4) stages. This research outlines the emission profiles of innovative materials with the potential to mitigate global warming through circular construction, offering a sustainable portfolio for designers, builders, and AECO professionals seeking non-conventional solutions aligned with circular economy principles. Full article

The growing global energy demand, particularly in India, calls for innovative strategies to improve building energy efficiency. With buildings contributing significantly to energy consumption, especially in cooling-dominated climates, sustainable insulation materials are essential in minimizing energy usage. This study explores the potential of bamboo biochar, fly ash, and lime as sustainable insulation materials for building envelopes. This study also addresses the critical issue of energy efficiency in building construction, specifically focusing on the comparative analysis of three materials for their thermal performance, environmental impact, and economic viability. This research aims to identify the most sustainable material choice by assessing each material’s life cycle energy consumption, thermal resistance, and associated costs. The research methodology involves an extensive review of 125 relevant studies to assess the thermal performance of these materials. U-values were computed from the reported thermal conductivity data and systematically arranged in chronological order to evaluate and compare their insulation effectiveness over time. Additionally, these materials were analyzed under sustainability criteria, incorporating life cycle analysis and a carbon footprint assessment. This study identifies existing research gaps and offers recommendations for future research, creating structure for the development of sustainable insulation system. Full article

Fiber-reinforced mycelium (FRM) composites offer an innovative and sustainable approach to construction materials for architectural structures. Mycelium, the root structure of fungi, can be combined with various natural fibers (NF) to create a strong and lightweight material with environmental benefits. Incorporating NF like hemp, jute, or bamboo into the mycelium matrix enhances mechanical properties. This combination results in a composite that boasts enhanced strength, flexibility, and durability. Natural FRM composites offer sustainability through the utilization of agricultural waste, reducing the carbon footprint compared to conventional construction materials. Additionally, the lightweight yet strong nature of the resulting material makes it versatile for various construction applications, while its inherent insulation properties contribute to improved energy efficiency in buildings. Developing and adopting natural FRM composites showcases a promising step towards sustainable and eco-friendly construction materials. Ongoing research and collaboration between scientists, engineers, and the construction industry will likely lead to further improvements and expanded applications. This article provides a comprehensive analysis of the current research and applications of natural FRM composites for innovative and sustainable construction materials. Additionally, the paper reviews the mechanical properties and potential impacts of these natural FRM composites in the context of sustainable architectural construction practices. Recently, the applicability of mycelium-based materials has extended beyond their original domains of biology and mycology to architecture. Full article

Bamboo is commonly used as a construction material in low-cost housing projects located in tropical and subtropical countries. This practice is especially prevalent in rural areas where bamboo grows naturally and families have experience working with it. Bamboo can be a sustainable building material for homes, even in cases where houses need to be resistant to earthquakes or storms. The traditional bahareque technology was enhanced in Costa Rica and Colombia to make it earthquake resistant. After the year 2000, this technology was transferred to several other countries in Latin America and Asia, gaining recognition as an innovative building technique. Many successful examples of bamboo housing constructions can be found in various countries, where modern architectural solutions are combined with innovative bamboo methods. Local communities can play a crucial role in bamboo processing, allowing residents to actively participate in the construction of their homes under technical supervision. This emphasizes the social sustainability aspect associated with bamboo. Ensuring the durability of bamboo housing constructions is paramount for the longevity of the houses, highlighting the need for technical assistance for self-builders and resident groups. With proper organization, bamboo housing has the potential to become part of the social production of housing. Full article

Mycelium-based bio-composites (MBCs) represent a sustainable and innovative material with high potential for contemporary applications, particularly in the field of modern interior design. This research investigates the fabrication of MBCs for modern interior materials using agro-industrial wastes (bamboo sawdust and corn pericarp) and different fungal species. The study focuses on determining physical properties, including moisture content, shrinkage, density, water absorption, volumetric swelling, thermal degradation, and mechanical properties (bending, compression, impact, and tensile strength). The results indicate variations in moisture content and shrinkage based on fungal species and substrate types, with bamboo sawdust exhibiting lower shrinkage. The obtained density values range from 212.31 to 282.09 kg/m³, comparable to traditional materials, suggesting MBCs potential in diverse fields, especially as modern interior elements. Water absorption and volumetric swelling demonstrate the influence of substrate and fungal species, although they do not significantly impact the characteristics of interior decoration materials. Thermal degradation analysis aligns with established patterns, showcasing the suitability of MBCs for various applications. Scanning electron microscope observations reveal the morphological features of MBCs, emphasizing the role of fungal mycelia in binding substrate particles. Mechanical properties exhibit variations in bending, compression, impact, and tensile strength, with MBCs demonstrating compatibility with traditional materials used in interior elements. Those produced from L. sajor-caju and G. fornicatum show especially promising characteristics in this context. Particularly noteworthy are their superior compression and impact strength, surpassing values observed in certain synthetic foams multiple times. Moreover, this study reveals the biodegradability of MBCs, reaching standards for environmentally friendly materials. A comprehensive comparison with traditional materials further supports the potential of MBCs in sustainable material. Challenges in standardization, production scalability, and market adoption are identified, emphasizing the need for ongoing research, material engineering advancements, and biotechnological innovations. These efforts aim to enhance MBC properties, promoting sustainability in modern interior applications, while also facilitating their expansion into mass production within the innovative construction materials market. Full article

Whilst upcoming innovations on digital technology and renewable energy can have a significant impact on the reduction of operational carbon emissions in the construction industry, readily available fast-growing building materials like bamboo are already proving reductions in the embodied carbon of dwellings above 60% when compared to traditional brickwork in Colombia. This paper presents a like-by-like comparison of the environmental impact of a conventional clay brick house (CBH) and a bamboo house for social housing in Colombia, which was built using adapted vernacular technologies. The bamboo house uses bamboo species Guadua angustifolia Kunth as the main structural support for the light cement bamboo frame (LCBF) system, a.k.a. ‘cemented bahareque’, whilst the CBH combines clay bricks and steel for the load-bearing walls. Traditionally built Guadua angustifolia Kunth bahareque (GaKB) houses are a key part of the vernacular architecture in the ‘coffee cultural landscape of Colombia’ (CCLC) recognised by UNESCO. A life cycle assessment (LCA) was performed to calculate the carbon footprint of the houses following four phases: (1) definition of objective and scope; (2) inventory analysis; (3) impact assessment; and (4) interpretation of results. The results show that the carbon footprint of the GaKB house accounts for about 40% of the CBH, i.e., the GaKB generates a carbon footprint of 107.17 CO₂-eq/m² whilst the CBH results in a carbon footprint of 298.44 kg CO₂-eq/m². Furthermore, from a carbon balance calculation, the carbon footprint of the GaKB house is further reduced to about 36% of the CSB house. LCA results for the built GaKB house demonstrate that vernacular housing projects that preserve cultural heritage can also be resilient and climate-neutral. This paper sets a precedent for the establishment of targeted government policies and industry practices that preserve the cultural heritage and vernacular technologies in the CCLC region and in other emergent economies worldwide whilst promoting future-proof and net-zero carbon construction. Full article

Bamboo is a natural biodegradable material used as a strength-bearing material that operates for system works, formwork supporting stands, structural members in low-rise houses, props, framing, bridges, laminated flooring, facades, walls, roofs, and trusses. Over recent years, there has been an increased demand for bamboo, considering sustainable construction practices. Exploring bamboo’s physical and mechanical behaviour is essential to develop innovative construction methods and design guidelines. Therefore, this paper aims to review the studies on bamboo culms’ material properties and physical behaviour, considering the load-bearing capacity and structural adequacy. This study summarises the physical and mechanical properties of a wide array of bamboo species grown worldwide. Mechanical properties such as compressive, tensile, flexural, shear, and bucking strengths are explored, highlighting the key findings in previous experimental works. Results have indicated a significant variability in bamboo’s material and mechanical properties considering the growth conditions, location along a culm, geometric imperfections and environmental conditions. In addition to material and mechanical properties, structural bamboo connections, engineered bamboo products, and preservative treatment of bamboo are also investigated. The construction industry can utilise the summary of the findings of this study to develop design guidelines for sustainable bamboo construction. Overall, this paper presents an overview of structural capability and drawbacks for future research and development using bamboo in modern construction. Full article

In Zambia, Western materials, techniques, and technologies, a symbol of emancipation, are replacing the local building culture, which is relegated to the poor sections of society, with a negative impact from an environmental, social, and economic point of view. Designing and building sustainable architecture in developing countries is a particularly complex task mainly because of the absence of scientifically codified information about vernacular architecture and available resources. The starting point for designing and building sustainable architecture is to know the territory and its resources. The research outlines the harvest map of sustainable resources in Lusaka’s geographic surroundings, created through site surveys and analysis of international databases. The method for creating a harvest map follows well-defined steps involving knowledge of climate, intangible resources, and material resources as described below. Knowledge of the climate is intended to enable a critical reading of the area’s resources; it is functional to understand the logic of traditional architecture and consequently to identify fields of innovation in it. Intangible resources are related to the building culture and techniques and technologies of vernacular architecture of the territory; material resources, on the other hand, are related to traditionally used materials, raw materials not yet exploited, but potentially usable and waste materials. The vernacular architecture of the Lusaka territory is based on low-tech systems and natural materials (mainly raw earth, plant fibers, wood, and bamboo). There are also tree species in the territory that, for their quantity and performance, could be used in the construction field, as well as waste materials from common use or from the agricultural supply chain. Starting from this harvest map, every designer has the knowledge of the area from which to use already known building systems related to the resources of the area or innovate them while respecting local culture and resources. Full article

Building with natural materials has proven to be a sustainable approach in addressing the needs of affordable and healthy housing and improving living conditions in informal settlements in an era of ecological transition. In view of this, the use of bamboo as a building material is considered a promising practice. However, although many traditional building techniques incorporate the use of bamboo, its application in contemporary informal settlements is disputed. This interdisciplinary study critically explores the social and cultural factors limiting the use of bamboo in a contemporary context by investigating housing perceptions and practices in an informal settlement in Colombia. Results show how the combined effect of cultural globalization, modernization, and the standardization of construction practices have marginalized and are now devaluing traditional knowledge on natural local building materials. Structured observations and in-depth interviews reveal that inhabitants’ refusal of the local bamboo building tradition, their representation of bamboo as an unsafe and temporary material, and their choices of less sustainable contemporary building materials, are better understood by situating these preferences within the complex system of the community’s imaginary. These social representations validate housing behaviors for their symbolic implications rather than for their actual consequences on livability, comfort, and overall dwelling quality. The study also discusses the limits of policies promoting natural building materials in housing when exclusively focusing on technical performance, while neglecting the prevailing impact of the cultural domain on housing preferences and behaviors. Full article

This study investigates the use of bamboo in different industrial sectors, including construction and energy, to highlight its mechanical properties, resources, and innovative use through information gathered from Ethiopia, Guinea, and Georgia (Caucasus) as study cases. Research shows that bamboo is a common plant and an easily accessible material possessing remarkable characteristics for different applications in different countries. The main goal of this study is to highlight the properties of bamboo that make it an interesting material with applications in several economic branches as a green material positively influencing the environment. The results of this study show a utilitarian use of bamboo in industries where production is based on bamboo or bamboo-related materials and wide possibilities for using bamboo in innovative and creative ways. Bamboo’s mechanical and physicochemical properties are discussed as well as its potential as a raw material for use in composites or for the production and processing of semi-finished products and parts of end devices, all with a view to its positive environmental impact. Full article

Various brands of bamboo crafts created by youths have emerged in Zhushan Township, Taiwan. With the special bamboo materials available in Zhushan Township as their core, these brands have created different types of social innovations through their management, design, and mechanical knowledge. The results indicate the following: (1) The youths advocate for causes such as the preservation of culture, mutually beneficial situations, sustainable local development, and environmentally friendly lifestyles. The youths proposed innovative solutions for these causes, such as establishing a guesthouse, revitalizing unused space, creating opportunities for dialogues, developing bamboo-based environmentally friendly products, and holding local activities; (2) the youths constructed a model for internal cooperation and enhancement, revitalization, and marketing Zhushan Township; (3) the youths advocated for various social values, utilized social capital, and proposed innovative solutions through diversified participation and the creation of new relationships, allowing different communities to generate a group dynamic to resolve social problems and achieve sustainability together. This study aids in the facilitation of sustainable management of township micro-enterprises by innovating products and service modes through social capital and social value. At the same time, local and common social innovation modes are connected to provide a reference for the social innovation of micro-enterprises. Full article

Polymer foams are an important class of engineering material that are finding diverse applications, including as structural parts in automotive industry, insulation in construction, core materials for sandwich composites, and cushioning in mattresses. The vast majority of these manufactured foams are homogeneous with respect to porosity and structural properties. In contrast, while cellular materials are also ubiquitous in nature, nature mostly fabricates heterogeneous foams, e.g., cellulosic plant stems like bamboo, or a human femur bone. Foams with such engineered porosity distribution (graded density structure) have useful property gradients and are referred to as functionally graded foams. Functionally graded polymer foams are one of the key emerging innovations in polymer foam technology. They allow enhancement in properties such as energy absorption, more efficient use of material, and better design for specific applications, such as helmets and tissue restorative scaffolds. Here, following an overview of key processing parameters for polymer foams, we explore recent developments in processing functionally graded polymer foams and their emerging structures and properties. Processes can be as simple as utilizing different surface materials from which the foam forms, to as complex as using microfluidics. We also highlight principal challenges that need addressing in future research, the key one being development of viable generic processes that allow (complete) control and tailoring of porosity distribution on an application-by-application basis. Full article

This paper experimentally investigates the properties of unprecedented new advanced composite structural members in compressions made of bamboo culms formed with different bio-based and synthetic matrices. Due to extensive CO₂ emissions corresponded to the production of construction materials, it is essential to produce high-performance environmental-friendly construction materials from bio-based renewable resources such as bamboo. However, the use of bamboo culms in construction has been hindered by their inherent specific geometric hollow shape. To address this issue, small-diameter bamboo species were used in this study to form solid structural composite cross-sections to desired shapes. An experimental study was conducted on the compressive properties of six composite structural members made of commonly available bamboo species (Phyllostachys edulis or Moso) with different matrices including a bio-based furan resin, a cementitious grout, and epoxy. In order to prevent premature buckling of bamboo components within the engineered columns, and in an attempt to propose a bio-based structural column, three layers of hemp wrap where applied to provide confinement for bamboo culms. The results of the tests confirm that the bamboo-furan and bamboo-grout composite columns both have the potential to reach a remarkable compressive strength of 30 MPa. However, the bamboo-epoxy composite specimen, considering the excellent mechanical properties of the epoxy matrix, delivered a benchmark to demonstrate the potentials of bamboo-based structural sections by reaching 76 MPa compressive strength before crushing. The bamboo-epoxy composite provided new prospects for future work on the 100% bio-based versions of the bamboo-based sections with improved bio-matrices (by using bio-epoxy and improved furan resins with compatible mixes) and innovative confinement types. With the promising results of this study, there is a real opportunity of creating contemporary engineered bamboo-based structures as a sustainable replacement to the existing steel, concrete and timber structures. Full article