Sustainable Panels Made with Industrial and Agricultural Waste: Thermal and Environmental Critical Analysis of the Experimental Results

Recycled waste materials obtained from industrial and agricultural processes are becoming promising thermal and acoustic insulating solutions in building applications; their use can play an important role in the environmental impact reduction. The aim of the present paper is the evaluation of the thermal performance of recycled waste panels consisting of cork scraps, rice husk, coffee chaff, and end-life granulated tires, glued in different weight ratios and pressed. Six panels obtained from the mixing of these waste materials were fabricated and analyzed. In particular, the scope is the selection of the best compromise solutions from the thermal and environmental points of view. To this aim, thermal resistances were measured in laboratory and a Life Cycle Assessment (LCA) analysis was carried out for each panel; a cross-comparative examination was performed in order to optimize their properties and find the best panels solutions to be assembled in the future. Life Cycle Analysis was carried out in terms of primary Embodied Energy and Greenhouse Gas Emissions, considering a ‘‘cradle-to-gate” approach. The obtained thermal conductivities varied in the 0.055 to 0.135 W/mK range, in the same order of magnitude of many traditional systems. The best thermal results were obtained for the panels made of granulated cork, rice husk, and coffee chaff in this order. The rubber granulate showed higher values of the thermal conductivity (about 0.15 W/mK); a very interesting combined solution was the panel composed of cork (60%), rice husk (20%), and coffee chaff (20%), with a thermal conductivity of 0.08 W/mK and a Global Warming Potential of only 2.6 kg CO2eq/m2. Considering the Embodied Energy (CED), the best solution is a panel composed of 56% of cork and 44% of coffee chaff (minimum CED and thermal conductivity).

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Thermal performance of Rice Husk Ash mixed mortar in concrete and masonry buildings

Budownictwo i Architektura ◽

10.35784/bud-arch.2121 ◽

2020 ◽

Vol 19 (4) ◽

pp. 043-052

Author(s):

Kajanan Selvaranjan ◽

J.C.P.H. Gamage ◽

G.I.P. De Silva ◽

Vajira Attanayaka

Keyword(s):

Thermal Conductivity ◽

Rice Husk ◽

Thermal Performance ◽

Amorphous Silica ◽

Rice Husk Ash ◽

Agricultural Waste ◽

Milling Process ◽

Masonry Buildings ◽

Wide Range ◽

Mixed Mortar

Rice Husk (RH) is an agricultural waste which is produced in huge amounts from the milling process of paddy rice. Rice Husk Ash (RHA) is a by-product material obtained from the combustion of rice husk. The amorphous silica-rich RHA (84-90 wt%) has a wide range of applications. This research focused on the possibility of utilizing RHA in the process of developing a mortar with low thermal conductivity to enhance the thermal comfort in concrete and masonry buildings. The thermal conductivity of mortar was determined by Lee’s Disc method, and the results were compared to the data for conventional mortar as well as commercial thermal insulation materials. The results indicate a significant reduction in thermal conductivity in the mortar developed with RHA

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Rice husk panels for building applications: Thermal, acoustic and environmental characterization and comparison with other innovative recycled waste materials

Construction and Building Materials ◽

10.1016/j.conbuildmat.2018.03.089 ◽

2018 ◽

Vol 171 ◽

pp. 338-349 ◽

Cited By ~ 31

Author(s):

C. Buratti ◽

E. Belloni ◽

E. Lascaro ◽

F. Merli ◽

P. Ricciardi

Keyword(s):

Rice Husk ◽

Waste Materials ◽

Environmental Characterization ◽

Recycled Waste

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Life cycle assessment, mechanical properties, and durability of roller compacted concrete pavement containing recycled waste materials

International Journal of Pavement Research and Technology ◽

10.1007/s42947-020-0217-7 ◽

2020 ◽

Author(s):

Iman Aghayan ◽

Ramin Khafajeh ◽

Mohsen Shamsaei

Keyword(s):

Mechanical Properties ◽

Life Cycle Assessment ◽

Life Cycle ◽

Concrete Pavement ◽

Waste Materials ◽

Roller Compacted Concrete ◽

Recycled Waste

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Rice husk derived waste materials as partial cement replacement in lightweight concrete

Ciência e Agrotecnologia ◽

10.1590/s1413-70542012000500010 ◽

2012 ◽

Vol 36 (5) ◽

pp. 567-578 ◽

Cited By ~ 5

Author(s):

Celso Yoji Kawabata ◽

Holmer Savastano Junior ◽

Joana Sousa-Coutinho

Keyword(s):

Rice Husk ◽

Lightweight Concrete ◽

Agricultural Waste ◽

Chloride Ion ◽

Sustainable Construction ◽

Waste Materials ◽

Cement Replacement ◽

Chloride Ion Penetration ◽

Partial Cement Replacement ◽

Physical And Chemical

In this study rice husk ash (RHA) and broiler bed ash from rice husk (BBA), two agricultural waste materials, have been assessed for use as partial cement replacement materials for application in lightweight concrete. Physical and chemical characteristics of RHA and BBA were first analyzed. Three similar types of lightweight concrete were produced, a control type in which the binder was just CEMI cement (CTL) and two other types with 10% cement replacement with, respectively, RHA and BBA. All types of similar lightweight concrete were prepared to present the same workability by adjusting the amount of superplasticizer. Properties of concrete investigated were compressive and flexural strength at different ages, absorption by capillarity, resistivity and resistance to chloride ion penetration (CTH method) and accelerated carbonation. Test results obtained for 10% cement replacement level in lightweight concrete indicate that although the addition of BBA conducted to lower performance in terms of the degradation indicative tests, RHA led to the enhancement of mechanical properties, especially early strength and also fast ageing related results, further contributing to sustainable construction with energy saver lightweight concrete.

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Influence of Recycled Wastes on Slag Foaming during EAF Steelmaking

Materials Science Forum ◽

10.4028/www.scientific.net/msf.819.381 ◽

2015 ◽

Vol 819 ◽

pp. 381-386 ◽

Cited By ~ 1

Author(s):

Anis Nadhirah Ismail ◽

Nur Farhana Diyana Mohd Yunos ◽

Shamsul Baharin Jamaludin ◽

Muhammad Asri Idris

Keyword(s):

Sessile Drop ◽

Agricultural Waste ◽

Waste Materials ◽

Partial Replacement ◽

Metallurgical Coke ◽

Slag Foaming ◽

Temperature Application ◽

Conventional Material ◽

Slag Droplet ◽

Recycled Waste

The potential converting the end-life product into a renewable source and replaced the conventional material found in iron and steelmaking production next tackled the world’s most problematic waste stream. Generally, integrating the waste material becomes wealth only available to certain wastes industries due to high temperature application. Recycling waste materials were introduced in order to control slag foaming in EAF steelmaking. The present paper reviews about slag foaming behaviour focused on slag droplet volume (Vt/V0 ratio), their transformation and morphology during carbon/slag interaction using sessile-drop technique at 1550°C on polymeric (HDPE), agricultural waste (palm shell), rubber tyres and metallurgical coke as the potential carbonaceous materials in EAF steelmaking. These results indicate that partial replacement of conventional materials with recycled waste materials is efficient due to improved interactions with EAF slag.

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The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

Matériaux & Techniques ◽

10.1051/mattech/2020023 ◽

2020 ◽

Vol 108 (2) ◽

pp. 203

Author(s):

Samia Djadouf ◽

Nasser Chelouah ◽

Abdelkader Tahakourt

Keyword(s):

Thermal Conductivity ◽

Compressive Strength ◽

Mechanical Behavior ◽

Agricultural Waste ◽

Hydraulic Press ◽

Dry Density ◽

Olive Stone ◽

Compressed Earth Blocks ◽

Clay Matrix ◽

Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

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A Comprehensive Framework for Standardising System Boundary Definition in Life Cycle Energy Assessments

Buildings ◽

10.3390/buildings11060230 ◽

2021 ◽

Vol 11 (6) ◽

pp. 230

Author(s):

Hossein Omrany ◽

Veronica Soebarto ◽

Jian Zuo ◽

Ruidong Chang

Keyword(s):

Life Cycle ◽

Energy Use ◽

Embodied Energy ◽

Building Energy Efficiency ◽

System Boundary ◽

Policy Makers ◽

Energy Assessment ◽

Boundary Definition ◽

Comprehensive Framework

This paper aims to propose a comprehensive framework for a clear description of system boundary conditions in life cycle energy assessment (LCEA) analysis in order to promote the incorporation of embodied energy impacts into building energy-efficiency regulations (BEERs). The proposed framework was developed based on an extensive review of 66 studies representing 243 case studies in over 15 countries. The framework consists of six distinctive dimensions, i.e., temporal, physical, methodological, hypothetical, spatial, and functional. These dimensions encapsulate 15 components collectively. The proposed framework possesses two key characteristics; first, its application facilitates defining the conditions of a system boundary within a transparent context. This consequently leads to increasing reliability of obtained LCEA results for decision-making purposes since any particular conditions (e.g., truncation or assumption) considered in establishing the boundaries of a system under study can be revealed. Second, the use of a framework can also provide a meaningful basis for cross comparing cases within a global context. This characteristic can further result in identifying best practices for the design of buildings with low life cycle energy use performance. Furthermore, this paper applies the proposed framework to analyse the LCEA performance of a case study in Adelaide, Australia. Thereafter, the framework is utilised to cross compare the achieved LCEA results with a case study retrieved from literature in order to demonstrate the framework’s capacity for cross comparison. The results indicate the capability of the framework for maintaining transparency in establishing a system boundary in an LCEA analysis, as well as a standardised basis for cross comparing cases. This study also offers recommendations for policy makers in the building sector to incorporate embodied energy into BEERs.

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Study and Use of Rice Husk Ash as a Source of Aluminosilicate in Refractory Coating

Materials ◽

10.3390/ma14133440 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3440

Author(s):

Mohd Na’im Abdullah ◽

Mazli Mustapha ◽

Nabihah Sallih ◽

Azlan Ahmad ◽

Faizal Mustapha ◽

...

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Agricultural Waste ◽

Fire Retardant ◽

Sem Analysis ◽

Refractory Coating ◽

Alkyd Paint ◽

Passive Fire Protection ◽

In Fire ◽

Geopolymer Binder

The utilisation of rice husk ash (RHA) as an aluminosilicate source in fire-resistant coating could reduce environmental pollution and can turn agricultural waste into industrial wealth. The overall objective of this research is to develop a rice-husk-ash-based geopolymer binder (GB) fire-retardant additive (FR) for alkyd paint. Response surface methodology (RSM) was used to design the experiments work, on the ratio of RHA-based GB to alkyd paint. The microstructure behaviour and material characterisation of the coating samples were studied through SEM analysis. The optimal RHA-based GB FR additive was formulated at 50% wt. FR and 82.628% wt. paint. This formulation showed the result of 270 s to reach 200 °C and 276 °C temperature at equilibrium for thermal properties. Furthermore, it was observed that the increased contents of RHA showed an increment in terms of the total and open porosities and rough surfaces, in which the number of pores on the coating surface plays an important role in the formation of the intumescent char layer. By developing the optimum RHA-based GB to paint formulation, the coating may potentially improve building fire safety through passive fire protection.

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