Circular economy potential for autoclaved aerated …
Since 2010, Xella has been investigating how and in what quantities residual AAC from demolished buildings or landfills can be recycled for producing new AAC. Around 10%–and even up to 15%, depending upon its quality–of …
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Comparison of different post-demolition autoclaved aerated concrete
Autoclaved aerated concrete (AAC) is used as masonry blocks and prefabricated reinforced elements preferably in residential buildings. Due to its porous structure and mineral composition, it combines low thermal conductivity and fire resistance properties. ... especially when substituting primary cement in closed-loop recycling. In economic ...
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Comparison of different post-demolition autoclaved aerated …
Current research approaches propose different open-loop recycling routes for post-demolition AAC, e.g. lightweight aggregate concrete, lightweight mortar, no-fines concrete, …
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Recycling of waste autoclaved aerated concrete powder in …
Autoclaved aerated concrete is a lightweight porous building material, it has low thermal insulating capacities (0.1–0.2 W/m∙K) and a low density (400–800 kg/m 3) (Bergmans et al., 2016).It has been widely applied to roof insulation, floor, trench fill and masonry unit of buildings for many years (Liu et al., 2017).
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Feasibility study of utilizing Autoclaved Aerated Concrete (AAC) …
Recycling of waste autoclaved aerated concrete powder in Portland cement by accelerated carbonation Waste Manag, 89 ( 2019 ), pp. 254 - 264, 10.1016/j.wasman.2019.04.018 View PDF View article View in Scopus Google Scholar
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An Innovative Autoclaved Aerated Concrete (AAC) with …
Recycling of materials, in particularly concrete was not frequently practiced in construction and moreover no study has been carried out yet. Furthermore, the environmental ... autoclaved aerated concrete, which exhibited a dry density of 0.61 g/cm3 and compressive strength of 4.0 N/mm2. Furthermore, Jitchaiyaphum et al. [7] found that by ...
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Feasibility of recycling autoclaved aerated concrete waste for …
DOI: 10.1016/j.jobe.2022.104481 Corpus ID: 248093891; Feasibility of recycling autoclaved aerated concrete waste for partial sand replacement in mortar @article{Zou2022FeasibilityOR, title={Feasibility of recycling autoclaved aerated concrete waste for partial sand replacement in mortar}, author={Dujian Zou and Zichao Que and Wei Cui and Xi Wang and Yuhang Guo and …
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Feasibility of recycling autoclaved aerated concrete waste for …
The study aims to examine the feasibility of recycling autoclaved aerated concrete waste (AACW) on a vast scale to prepare sustainable mortars without large mechanical …
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POST-DEMOLITION AUTOCLAVED AERATED …
Autoclaved aerated concrete (AAC) is an increasingly used building material due to its exceptional thermal properties. Post-demolition AAC is mainly disposed in landfills because of lacking …
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Designing a new recycling network for post-demolition autoclaved
Designing a new recycling network for post-demolition autoclaved aerated concrete (AAC) in Europe. Justus J Steins 1, Rebekka Volk 1, Christoph Stallkamp 1 and Frank Schultmann 1. Published under licence by IOP Publishing Ltd
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Optimal design of a post-demolition autoclaved aerated concrete …
This study develops a new capacitated, multi-period, and multi-stage network model for optimising a Germany autoclaved aerated concrete recycling network. The multi-period character of the model enables the precise consideration of increasing post-demolition volumes by constantly allowing the move of recycling plants or opening new ones ...
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The Physical and Mechanical Properties of Autoclaved Aerated Concrete
The humidity of the autoclaved aerated concrete showed an inconsistent trend, ranging between 20.3% and 32.7% when the recycling powder concentration was between 0% and 50% by weight. The humidity values of all the samples were within the acceptable range, which is less than 50%, as outlined by the ASTM C642-97 [ 6 ].
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A Review on the Utilization ofWaste Material for …
Based on the review, an increase of AAC application causes much waste at construction sites and recycling concrete waste powder into wall concrete; particularly, an AAC was not frequently ...
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Recycling aerated concrete waste as aggregate to produce …
This study uses aerated concrete waste (ACW) as a case study to investigate the effect of recycled concrete aggregate on the performance of eco-friendly foamed mortar (EFM). The results show that while incorporating ACW reduces fluidity and mechanical properties due …
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Recycling aerated concrete waste as aggregate to produce …
Non-structural components are difficult to recycle into fresh concrete due to their high porosity, high water absorption, and low strength. This study uses aerated concrete waste (ACW) as a case study to investigate the effect of recycled concrete aggregate on the performance of eco-friendly foamed mortar (EFM).
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Sustainable applications for utilization the construction waste of
Recycling aerated concrete blocks (ACB) and sintered clay bricks (SCB) is difficult due to their high porosity and low strength for concrete production. The workability and mechanical properties of cementitious composites will be severely deteriorated when ACB and SCB are used as recycled coarse aggregate. However, using them as recycled sand ...
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Recycling belite cement clinker from post-demolition autoclave...
Increasing post-demolition autoclaved aerated concrete (pd-AAC) waste is mainly landfilled due to its physical properties and lacking recycling processes. A promising technology is the production of recycled belite cement clinker, which can partially substitute Portland cement clinker. This paper presents experimental data of recycled belite cement clinker production …
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Recycling belite cement clinker from post-demolition autoclaved aerated
Increasing post-demolition autoclaved aerated concrete (pd-AAC) waste is mainly landfilled due to its physical properties and lacking recycling processes.
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Autoclaved aerated concrete
Autoclaved aerated concrete (AAC) is concrete that has been manufactured to contain closed air pockets. AAC is one-fifth the weight of concrete. ... Offcuts from construction can be returned to the manufacturer for recycling, or be sent out as concrete waste for reuse in aggregates; alternatively, the odd pieces can be used directly for making ...
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Recycling of desulfurization slag for the production of autoclaved
The purpose of this study was to reuse desulfurization (De-S) slag in the production of autoclaved aerated concrete (AAC). The non-magnetic fraction of De-S slag is rich in calcium and silicon compounds, and therefore suitable to be …
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Autoclaved aerated concrete with sulphate content: an …
Autoclaved aerated concrete (AAC) contains a small quantity of sulphate. For example, a modern quality class PP2-0,35 AAC (λ = 0.09 W/(mK)) from Xella contains about five per cent by mass of ...
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Comparison of different post-demolition autoclaved aerated concrete
Autoclaved aerated concrete (AAC) is used as masonry blocks and prefabricated reinforced elements preferably in residential buildings. Due to its porous structure and mineral composition, it combines low thermal conductivity and fire resistance properties. Consequently, the popularity of AAC increases. However, due to significant AAC production volumes in many European …
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Comparison of different post-demolition autoclaved aerated concrete
[20] Bergmans J, Nielsen P, Snellings R and Broos K 2016 Recycling of autoclaved aerated concrete . in floor scre eds: Sulfate leaching reduction by ettringite formation Construction and Building .
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Modelling and predicting the generation of post-demolition autoclaved
Increasing post-demolition autoclaved aerated concrete (pd-AAC) waste is mainly landfilled due to its physical properties and lacking recycling processes. A promising technology is the production of recycled belite cement clinker, which …
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Feasibility of incorporating autoclaved aerated concrete waste for
The disposal of autoclaved aerated concrete waste in present work is to realize its recycling utilization in building construction. The autoclaved aerated concrete waste disposal procedure is illustrated in Fig. 1. The collected AACW from the building demolition site was firstly crushed into small particles as a raw material (AACW1, with light ...
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Recycling of autoclaved aerated concrete in floor screeds: Sulfate
DOI: 10.1016/J.CONBUILDMAT.2016.02.075 Corpus ID: 137845662; Recycling of autoclaved aerated concrete in floor screeds: Sulfate leaching reduction by ettringite formation @article{Bergmans2016RecyclingOA, title={Recycling of autoclaved aerated concrete in floor screeds: Sulfate leaching reduction by ettringite formation}, author={Jef Bergmans and Peter …
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Recycling of waste autoclaved aerated concrete powder in …
To recycle waste autoclaved aerated concrete (WAAC) and minimize environmental pollution induced by Portland cement (PC), carbonation curing was performed …
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Reinforced autoclaved aerated concrete (RAAC)
Owners or managers of these buildings should identify reinforced autoclaved aerated concrete (RAAC) in their buildings and seek specialist advice to assess it and develop a management plan. The Institution of Structural Engineers information on Reinforced Autoclaved Aerated Concrete (RAAC) provides authoritative guidance on RAAC.
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Life cycle assessment of post-demolition autoclaved aerated …
Despite data uncertainties, recycling of pd-AAC is advantageous for several recycling options, including the production of AAC, light mortar, lightweight aggregate …
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Recycling of autoclaved aerated concrete in floor screeds: Sulfate
Autoclaved aerated concrete (AAC) is a lightweight cellular concrete. Recycling AAC in concrete or unbound applications may cause problems because of high amounts of leachable sulfate. This study evaluates the recycling of AAC demolition waste as a replacement of sand in floor screed.
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