Reuse of fly ash and bottom ash in mortars with improved thermal conductivity performance for buildings

Ghosh, Avijit; Ghosh, Arup; Neogi, Subhasis

doi:10.1016/j.heliyon.2018.e00934

Cited by 50 publications

(10 citation statements)

References 17 publications

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“…Environmental sustainability includes advanced innovations to monitor and minimize CO 2 emissions and energy usage and replace cement with supplementary cementitious materials, namely Pozzolans [1]. Diatomaceous earth [2], silica fume [3], volcanic ash [4], bottom ash, and husk/fly ash [5][6][7] are used in traditional pozzolans. Furthermore, several nanoparticles (NPs), for instance, carbon nanotubes [8], nano metakaolin [7,[9][10][11], nanosilica (NS) [7,[11][12][13][14][15][16], nano-Al 2 O 3 [17,18], nano-TiO 2 [19,20], nano-CuO [21], and nano-Fe 2 O 3 [22,23], have also recently been investigated with rapid improvements in nanomaterial technology.…”

Section: Introductionmentioning

confidence: 99%

Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages

2022

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Sustainable construction requires high-strength cement materials that additives with silica content could provide the requirements as well. In this study, the effect of the micro and nano-size of silica on the compressive strength of cement paste using different mathematical approaches is investigated. This study compares the strength of preferentially replaced cement pastes with microsilica (MS) and nanosilica (NS) incorporation by proposing several mathematical models. In this study, 205 data were extracted from the literature and analyzed. The modeling processes considered the most significant variables as input variables that influence the compression strength, such as curing time, which ranged between 3 and 90 days, the water-cement ratio, which varied between 0.4 and 0.85, and NS ranged between 0 and 15%. MS ranged between 0 and 40% based on the weight of cement. In this process, the compressive strength of cement paste modified with NS and MS was modeled using four different models, including the Linear Regression Model (LR), Nonlinear Model (NLR), Multi-Logistic Regression Model (MLR), and artificial neural network (ANN). The efficiency of the suggested models was evaluated using different statistical assessments, such as the Root Mean Squared Error (RMES), the Mean Absolute Error (MAE), Scatter Index (SI), Objective value (OBJ), and coefficient of determination (R2). The findings revealed that the ANN model conducted better performance for predicting compressive strength for cement paste than the other models based on the statistical assessment. In addition, based on the statistical assessment of the sensitivity of parameters, NS had more of an effect on the compressive strength of cement paste, with 6.3% more than MS.

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Section: Introductionmentioning

confidence: 99%

Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages

2022

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“…Increased construction activity is exacerbating raw materials scarcity and emissions associated with the transportation and manufacturing of building materials [37]. Industrial by-products and waste materials like waste foundry sand [38,39], ground granulated blast furnace slag [40,41], steel slag [42,43], imperial smelting furnace slag [44], copper slag [45,46], bottom ash [47,48], class F type fly ash [48,49], silica fumes [50], palm oil clinker [51], rice husk ash [52,53], bagasse [54,55] and composites [56] have been found to improve buildings' structural and environmental performance when used instead of fine aggregates. Apart from generating industrial by-products, the recycling of C&D waste can also help reduce environmental impact and costs attributable to building materials [57]:…”

Section: Building Materialsmentioning

confidence: 99%

A Review of Residential Buildings’ Sustainability Performance Using a Life Cycle Assessment Approach

2019

J Sustain Res

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Achieving sustainable buildings is a challenging task. Building sustainability involves "green building" design and construction, taking account of both environmental elements and economic benefits, along with social obligations to the society we live in. This article aims to critically review and analyse studies of the building and construction industry that deal with aspects of sustainability, including environmental life cycle assessment, life cycle costing, social life cycle assessment and cleaner production strategies, and to examine the research gaps in order to generate recommendations for further research. About 807 refereed research articles on residential buildings published over the last 10 years (2009-2019), were downloaded, having been searched from online databases (including Scopus, Web of Science, ScienceDirect and Compendex) using keywords. Building materials, embodied energy and operating energy were found to contribute chiefly to the environmental and socioeconomic objectives of the construction industry. Many studies covered only the life cycle tools (such as environmental life cycle assessment, life cycle costing, and social lifecycle assessment) used in the sustainability assessment process. The "carbon footprint" concept is the most commonly used indicator in building sustainability assessments, underlining the urgent need to deploy more diverse environmental impact categories in order to avoid trade-offs among environmental, social and economic objectives. The social life cycle assessment tool needs a methodological breakthrough to improve its application in the building industry. In most of the studies, only an approximate evaluation of buildings' service life is the main consideration in life cycle assessments, while the important factor of the quality of the materials used in buildings is often neglected. However, a methodological approach to estimate the service life of structures that considers the durability of different building components would provide a more realistic life cycle assessment. Hence it would be judicious to address the thematic and methodological gaps identified in this paper, thereby optimising the understanding and communication of life cycle outcomes in building sustainability.

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“…Besides, the extreme weather such as increasing in heat frequency is the most important issue of energy required in the building. Reference [9] have mentioned that the energy efficiency in the building is not only minimised the electrical energy demand but also focussed on the performance of building especially operational energy and material used in building. Energy efficiency in the also discussed on natural ventilation, carbon dioxide (CO 2 ) emission and daylighting, and thermal insulation is very costly therefore choose the appropriate material is more significant [9].…”

Section: Problem Statementmentioning

confidence: 99%

Mechanical Behaviour of Mortar Made with Washed Bottom Ash as Sand Replacement

Muda¹

2019

IJETER

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Bottom ash (BA) is a waste material which found from the electrical power plant whether collect from a boiler or landfill area. While, mortar is a construction material which incorporated between sand, cement and water. There are a lot of problems such as environmental impact and limited sources of raw material which able to solve by using waste material as a sand replacement in mortar. Thus, BA is selected and treated with fully submerging in the water to recognise as washed BA. The process is used for minimised the carbon content of the BA. Washed BA is utilised in a mortar with 5%, 10%, 15%, 20% and 25% of sand replacement and compared the result with control mix (0%) of sand replacement. The mortar design mix proportion is depended on cement to sand ratio of 1:3 with 0.55 of water-cement ratio. There are two testings, workability for fresh condition and compressive strength for hardening condition of the mortar is done. As a result, the height of the slump is reduced with increasing of the sand replacement in mortar. Additionally, the maximum load and compressive strength of the mortar is also decreased when the washed BA as a sand replacement added. Lastly, the specimen with 15% of sand replacement of washed BA is the best mortar mix which provided reasonable compressive strength and workability for further study.

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Reuse of fly ash and bottom ash in mortars with improved thermal conductivity performance for buildings

Cited by 50 publications

References 17 publications

Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages

Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages

A Review of Residential Buildings’ Sustainability Performance Using a Life Cycle Assessment Approach

Mechanical Behaviour of Mortar Made with Washed Bottom Ash as Sand Replacement

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