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Natural Fibers: Modifications and Enhancements in Applications
Published in Andreea Irina Barzic, Neha Kanwar Rawat, A. K. Haghi, Imidic Polymers and Green Polymer Chemistry, 2021
Ananthu Prasad, Sabu Thomas, Athira John
Biobased structural composites in construction industry are of significant importance for fencing, decking, siding, doors, windows, bridges, fiber cement, and so on. Advantages associated with the use of natural fibers to reinforce cement, known as fiber cement, include the availability of raw material from renewable sources, high-fiber-tensile strength, high modulus of elasticity, relatively low cost, and well-developed technology for fiber processing.35 Fiber cement presents improved toughness, ductility, flexural capacity, and crack resistance compared to nonfiber-reinforced, cement-based materials.25
Exterior Enclosure Components
Published in Kathleen Hess-Kosa, Building Materials, 2017
Fiber cement siding, also referred to as concrete siding, is a composite material made of sand, cement, and cellulose (i.e., wood) fibers. Although the sand component can pose a crystalline silica occupational exposure hazard, emissions are irritant/toxic but emissions are highly unlikely—unless old cement siding (comprised of asbestos fibers instead of cellulose fibers) is damaged. Cement siding is not combustible.
Energy conservation assessment of traditional and modern houses in Sydney
Published in Building Research & Information, 2021
Haider Albayyaa, Dharmappa Hagare, Swapan Saha
A number of studies have used energy simulation programs to analyse the energy performance of different buildings while considering parameters such as walls, orientation and HVAC (heating, ventilation, and air conditioning) systems in a single-zone house built with a single floor (Bambrook et al., 2011; Hasan et al., 2008). The flooring system used in most previous studies has been a concrete slab directly on the ground. However, older houses were built with raised timber floors, which might significantly increase the energy required for heating and cooling. Fibro houses were commonly built in Australia after World War I. Population increase promoted a housing boom; and there became a need for a new building system that was easy and quick to build and user-friendly. At that time, fibro was a revolutionary product, being durable and easy and cheap to build. Fibro is an abbreviation of fibre-cement sheeting and is a building product with low cost and quick construction characteristics. This resulted in a boom for fibro houses in Australia. In the 1960s, fibro was so popular it was used in almost 20% of the houses constructed in Australia at that time (AARCO, 2018). Recently, Albayyaa et al. (2019) analysed fibro and brick veneer houses. However, this study was limited in scope and did not consider other constructions such as, double brick and reverse brick veneer constructions.
Design for construction waste minimization: guidelines and practice
Published in Architectural Engineering and Design Management, 2020
Vikrom Laovisutthichai, Weisheng Lu, Zhikang Bao
Prepared information was manipulated to form an architectural design concept. Owing to site conditions and occupant requirements, a façade was presented to improve comfort in the hot and humid environment and increase privacy. The architect applied some DfCWM techniques at this level. Deviating from standard working procedure, façade materials selection and mock-up model were happened in this stage to avoid redesign and misunderstanding in subsequent stages. Three façade styles and three types of materials (fibre cement wood, concrete block, and aluminium sheet) were proposed. After the discussion and consideration of long-run waste minimization, the client chose 1.22 × 2.44 meter aluminium sheets and a curved-style façade (see Figure 4) due to its durability, flexibility, and preference.The design team also pondered the characteristics of off-site construction, as reviewed in Stage 1, generally involving unit manufacture remotel from the site and unit installation on-site. To support this method, unit size and joints were carefully considered, while improving the façade scheme. Several design features including panel variations and excessively complicated form were withdrawn, and the concept design based on the combination of the standardized curved panel was proposed.
Influence of binder on the multiscale properties of hemp concretes
Published in European Journal of Environmental and Civil Engineering, 2019
Guillaume Delannoy, Sandrine Marceau, Philippe Glé, Etienne Gourlay, Marielle Guéguen-Minerbe, Dinarzed Diafi, Issam Nour, Sofiane Amziane, Fabienne Farcas
Indeed, some of the shiv components are solubilised in the water used during the manufacturing. Some of them can delay or even inhibit the hydraulic reactions as observed by Magniont (2010), Diquelou et al. (2015) and Nozahic (2012). Inhibition mechanisms have been studied in wood aggregate–concrete and in vegetal fibre–cement composites. For example, pectin can trap calcium ions which reduce the concentration of calcium available for hydration reactions (Sedan et al., 2008). Shiv saccharides (sugars) extracted in the water can also be adsorbed at the surface of cement grains and either form water diffusion barrier or poisoning precipitation sites of hydrates (Frybort, Mauritz, Teischinger, & Müller, 2008). The shiv may randomly inhibit the hydraulic reactions, which could explain the low compressive strength observed for NC-HC as well as its high variability.