Study of Homogeneous Chipboard Manufacturing u sing Betung Bamboo (Dendrocalamus Asper) Mixed with Polyethylene Addictive

Bamboo is an evergreen plant native to Asia and America that grows at every altitude, even in unideal climate conditions. Betung bamboo or its scientific name Dendrocalamus Asper is one of the bamboo species that are easily found in peninsular Malaysia. This study examined the characteristics of Betung bamboo and its potential to manufacture chipboard. Several tests were conducted, namely modulus of elastic (MOE), modulus of rupture (MOR), thickness swelling (TS), and water absorption (WA) to evaluate the potential of Betung bamboo as the primary material in the manufacture of chipboard mixed with polyethylene as additive are the parameters considered. This study found that the composition of 70% bamboo and 30% polyethylene was produced optimum chipboard which met BS EN standards (British and European Standard). It was also found that the MOE and MOR values of the resulting chipboard exceeded the medium density board standards. For WA and TS values, the chipboard achieved the standard requirements. Thus, this study concludes that chipboard made of Betung bamboo with the addition of polyethylene is suitable to be applied for internal and external doors, and internal paneling for any commercial or domestic building and furniture.

Low-cost and easily replicable apparatus: an Arduino controlled device for educational activities focused on measuring Brewster’s angle

In this work, we report the development of a low-cost Arduino-controlled device for didactic activities in light polarization. The main body of the prototype was designed and produced using laser-cut medium density fibreboard parts, including gears and pulleys. As a light source and detector, a 532 nm laser pointer and a light dependent resistor were used, respectively. The moving parts (light source and detector) are controlled using a stepper motor (28BYJ-48) with the ULN2003 driver. The apparatus was tested with glass and plastic (polystyrene) slides. The results show that the prototype can distinguish between parallel and perpendicular polarization (to the plane of incidence). In addition, it is demonstrated that the prototype can be satisfactorily applied to determine the Brewster’s angle, even for solids with close refractive indexes.

Get Wavy: Introducing irregularity into modular timber housing

<p>The construction industry accounts for 23% of global CO₂ emissions each year¹. Coupled with contemporary pressures of urbanisation, there is demand for increased density construction². To improve the relationship the industry has with the environment it must reconsider its construction methods and material choices. Engineered timber is a sustainable and structural solution for these issues. Commonly when building with engineered timber, traditional construction methodologies are applied. The material is simply used as a replacement for steel and concrete and does not explore the tectonic opportunities available. This results in the same monolithic multi-story buildings. This research portfolio offers a new approach to flexible modular housing using cross-laminated timber (CLT). It is researched through an adaptable urban housing complex. It explores the tectonics of CLT and develops a diverse design language that offsets how the material has been traditionally used. The design research was conducted through a series of design-led experiments comprised of four key phases; the problem, the exploration, the parts and the test. The problem researched key issues around CLT. This highlighted current deficiencies in the design of timber medium-density housing in New Zealand. The research explores the specific tectonics of CLT as an engineered timber product. Developing a series of components that can be assembled on various urban sites. This process translated into a singular site-specific test in Te Aro, Wellington. The implications of this research are to provide an alternative approach to urban medium-density housing using engineered timber technology. The result of this process is the design of a modular system of interlocking dwellings that can be optimized to site and that optimise the visual and spatial opportunities of engineered timber. Offsetting the current design language of medium-density timber buildings and proposing visual and spatial improvements to inner-city living in New Zealand. ¹ (Huang, Krigsvoll, Johansen, Liu, & Zhang, 2018) ² (Wellington City Council, 2015.)</p>

A Life Cycle Assessment of Medium Density Houses in New Zealand

<p>This study develops an analysis method that designers can use to undertake a Life Cycle Assessment (LCA) on multiple building designs to inform design decisions and trials this on Medium Density Housing (MDH). Measuring the environmental impact of a building is a time and resource-intensive process requiring multiple analysis tools, numerous inputs and quality assurance steps. Together with a lack of knowledge from designers, this makes it an unattractive task. Therefore, a method was needed to remove these barriers so that an LCA could be integrated into a designer’s workflow to inform design decisions. To simulate issues designers would face in the early design stages when undertaking an LCA, an LCA was performed on three MDH houses using selected designers’ Building Information Modelling (BIM) models in a warm and cool climate (Auckland and Christchurch). The LCA impact of changes to the insulation levels above the New Zealand Building Code minimum was examined to test the utility of the process. Unique in the literature, this study includes multiple LCA indices: material impacts, resultant operational energy use, change in materials, multiple environmental indicators, the rationale behind the selected buildings, quality assurance of the results, presentation of model inputs and all results in sufficient detail for the methodology to be tested and replicated. The case study research methodology developed three MDH houses that were representative of a broad range of MDH houses currently for sale in New Zealand. The goal was to evaluate whether the research method can identify differences between buildings that might inform design choices. In theory, a single BIM model eliminates the need to have three building models: the designer’s construction model; the LCA analysis model; and the energy performance model saving time and complexity for the designer. This methodology identified that it was not possible to have a single BIM model in Revit and use this for both an energy simulation and LCA using LCAQuick. Each house was recreated in OpenStudio for simulation in EnergyPlus to generate the energy performance of each house. A database of inputs for the energy models was created, which was quality assured for use by designers. A visual assessment diagram was created to allow designers to interpret the output to help inform design decisions. The case study analysis determined that the design of the houses had a more significant effect on reducing environmental impact compared to increasing insulation levels above the minimum required by the building code. Changes to the buildings’ insulation levels resulted in an average change in environmental impact across the seven environmental indicators ranging from -1 to 7% in Auckland and -2 to 2% in Christchurch, whereas differences in the design resulted in a change in environmental impact of 21 to 22% in Auckland and 22 to 23% in Christchurch. The research has demonstrated that LCA can be integrated into a designer’s workflow. Designers can assess the environmental impact of multiple houses and construction changes in different climates and with multiple construction changes to each. However, the process requires further refinement. There is still a need to develop the Computer-Aided Design (CAD) modelling methods and their integration with the analytical tools.</p>

Get Wavy: Introducing irregularity into modular timber housing

<p>The construction industry accounts for 23% of global CO₂ emissions each year¹. Coupled with contemporary pressures of urbanisation, there is demand for increased density construction². To improve the relationship the industry has with the environment it must reconsider its construction methods and material choices. Engineered timber is a sustainable and structural solution for these issues. Commonly when building with engineered timber, traditional construction methodologies are applied. The material is simply used as a replacement for steel and concrete and does not explore the tectonic opportunities available. This results in the same monolithic multi-story buildings. This research portfolio offers a new approach to flexible modular housing using cross-laminated timber (CLT). It is researched through an adaptable urban housing complex. It explores the tectonics of CLT and develops a diverse design language that offsets how the material has been traditionally used. The design research was conducted through a series of design-led experiments comprised of four key phases; the problem, the exploration, the parts and the test. The problem researched key issues around CLT. This highlighted current deficiencies in the design of timber medium-density housing in New Zealand. The research explores the specific tectonics of CLT as an engineered timber product. Developing a series of components that can be assembled on various urban sites. This process translated into a singular site-specific test in Te Aro, Wellington. The implications of this research are to provide an alternative approach to urban medium-density housing using engineered timber technology. The result of this process is the design of a modular system of interlocking dwellings that can be optimized to site and that optimise the visual and spatial opportunities of engineered timber. Offsetting the current design language of medium-density timber buildings and proposing visual and spatial improvements to inner-city living in New Zealand. ¹ (Huang, Krigsvoll, Johansen, Liu, & Zhang, 2018) ² (Wellington City Council, 2015.)</p>

A Life Cycle Assessment of Medium Density Houses in New Zealand

<p>This study develops an analysis method that designers can use to undertake a Life Cycle Assessment (LCA) on multiple building designs to inform design decisions and trials this on Medium Density Housing (MDH). Measuring the environmental impact of a building is a time and resource-intensive process requiring multiple analysis tools, numerous inputs and quality assurance steps. Together with a lack of knowledge from designers, this makes it an unattractive task. Therefore, a method was needed to remove these barriers so that an LCA could be integrated into a designer’s workflow to inform design decisions. To simulate issues designers would face in the early design stages when undertaking an LCA, an LCA was performed on three MDH houses using selected designers’ Building Information Modelling (BIM) models in a warm and cool climate (Auckland and Christchurch). The LCA impact of changes to the insulation levels above the New Zealand Building Code minimum was examined to test the utility of the process. Unique in the literature, this study includes multiple LCA indices: material impacts, resultant operational energy use, change in materials, multiple environmental indicators, the rationale behind the selected buildings, quality assurance of the results, presentation of model inputs and all results in sufficient detail for the methodology to be tested and replicated. The case study research methodology developed three MDH houses that were representative of a broad range of MDH houses currently for sale in New Zealand. The goal was to evaluate whether the research method can identify differences between buildings that might inform design choices. In theory, a single BIM model eliminates the need to have three building models: the designer’s construction model; the LCA analysis model; and the energy performance model saving time and complexity for the designer. This methodology identified that it was not possible to have a single BIM model in Revit and use this for both an energy simulation and LCA using LCAQuick. Each house was recreated in OpenStudio for simulation in EnergyPlus to generate the energy performance of each house. A database of inputs for the energy models was created, which was quality assured for use by designers. A visual assessment diagram was created to allow designers to interpret the output to help inform design decisions. The case study analysis determined that the design of the houses had a more significant effect on reducing environmental impact compared to increasing insulation levels above the minimum required by the building code. Changes to the buildings’ insulation levels resulted in an average change in environmental impact across the seven environmental indicators ranging from -1 to 7% in Auckland and -2 to 2% in Christchurch, whereas differences in the design resulted in a change in environmental impact of 21 to 22% in Auckland and 22 to 23% in Christchurch. The research has demonstrated that LCA can be integrated into a designer’s workflow. Designers can assess the environmental impact of multiple houses and construction changes in different climates and with multiple construction changes to each. However, the process requires further refinement. There is still a need to develop the Computer-Aided Design (CAD) modelling methods and their integration with the analytical tools.</p>

Aesthetics of Home. Continuity and Variation in New Zealand Medium Density Housing

<p>In New Zealand, most people do not find Medium Density housing (MDH) visually appealing. In October 2017, BRANZ carried out a survey on the different attitudes New Zealanders have towards MDH. This study concluded that the visual aesthetics is one of the top issues in shifting the acceptance of MDH within New Zealand. (BRANZ, 2017. p.2) Additionally in an attempt to house many people quickly, there have been growing concerns around the quality of the aesthetic output. (Howden-Chapman, 2015. p.80) This negative attitude towards MDH has fuelled the ever growing housing crisis. This thesis proposes that improved aesthetic qualities can be achieved within a high density multiple housing project. It argues that identifying and analysing the current aesthetic issues connected with existing MDH in New Zealand, will create a starting point for further design-led research. From this critique, this thesis aims to design a viable alternative to the current New Zealand approach to MDH. This design will aim to model varied aesthetic qualities and to identify key strategies for potential application in other projects. Research will occur through an extended series of different design-led research projects. Initially a quick fire design exercise in parallel with initial background research around the field of MDH and aesthetics will form the basis to begin from. Self and peer reflection will follow to inform the iterative research, extracting the key issues emerging from the research. Both research for design (theories and precedents), and researching through a series of iterative design projects occur. These two integrated research methods will be repeated in cycles throughout the year to keep the research current throughout the process and develop its depth.</p>

Quality Assembly: Designing to offsite fabrication for medium density living in New Zealand

<p>This research portfolio looks at how consciously activating prefabrication into the design process early, and subsequently designing to the onsite assembly stage by using three key design principles, can contribute to a responsive design that embodies quality medium density living in New Zealand. Prefabrication is at the forefront of the New Zealand Government’s conversation about its residential construction industry. The potential attributes of this efficient construction method of fast on-site installation time, reduced cost, improved construction safety, and improved construction quality, have the potential to positively impact the issues that our housing industry faces. However, the intrinsic limitations that come with prefabrication being based on the ideals of efficiency, carry the risk (as seen throughout its history) of compromising the design quality. With the motivation to integrate this construction process into New Zealand’s commonplace residential construction industry based on its positive attributes, it is essential to address its relationship to the designed outcome, and consequently the design process. Ryan E. Smith of Washington State University in Prefab Architecture expresses that prefabrication is a construction process not a product so a poor design results from a poor designer. He specifies that for a prefabrication project to achieve quality construction and aesthetics the design process must be directed to “quality assembly”. This idea endorses the integration of this chosen construction process in accordance with the design intent and guide the design through various scales to the detailing of assembly. For this integration of ‘quality assembly’ into the design process three principles have been interpreted from founding literature as being key drivers: standardisation, repetition, and personalisation. Standardisation is the act of simplifications to efficiently design. Based on chosen factors measurements are controlled allowing pieces, elements, and/or units to relate to one another cleanly. Repetition is the act of reducing variances within the construction, maximising the efficiency of prefabrication. Traditionally this can improve quality. Personalisation is the principle that relates the desirability of the outcome with the necessity appropriately suiting its site and occupancy. This research is positioned within New Zealand’s residential climate, which is seeing a growing demand for medium density living. The defined programme accommodates two key demographics within this density of first-home buyers and homeowners downsizing. The focus is to design a system that assists quality living – giving an alternative archetype – for New Zealand’s evolving climate. Key findings from this research support the design intent of ‘designing to assembly’, whereby the construction process and the outcome are integral to one another. By focussing collectively on standardisation, repetition, and personalisation, a responsive design that is suitable to various sites and occupancies can be realised. The challenge lies within balancing flexibility with restriction efficiently.</p>