A novel approach to recycling construction waste 25 October 2018 Aerated concrete made of brick (rear); aerated concrete made of sand-lime stones (front).
May 15, 2016· Read "Recycling of autoclaved aerated concrete in floor screeds: Sulfate leaching reduction by ettringite formation, Construction and Building Materials" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Autoclaved aerated concrete (AAC) is a lightweight cellular concrete that has been used for more than 80 years. Currently, however, no good recycling options for AAC from construction and demolition
Abstract. Xella Technology and Research, in a pilot study with the Hamburg-based Otto Dörner waste management company and the Ytong plant in Wedel, has been testing since 2013 how and in what amounts autoclaved aerated concrete (AAC) remains from demolished buildings or from waste disposal sites can be reused for new AAC production.
Aerated concrete block, also referred to as autoclaved aerated concrete or AAC, is an innovative type of concrete containing around 80 percent air. These special concrete blocks have a number of advantages: They're strong, light and provide better sound …
Reaction Behavior of Autoclaved Aerated Concrete and Sodium Aluminate at Mild Alkaline and Acid Hydrothermal Conditions: Model for AAC Recycling Andrea Hartmann ; and Josef C. Buhl Full text
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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 an alternative raw material for AAC production.
Autoclaved aerated concrete (AAC) is made with fine aggregates, cement, and an expansion agent that causes the fresh mixture to rise like bread dough. In fact, this type of concrete contains 80 percent air. In the factory where it is made, the material is molded and cut into precisely dimensioned units.
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.
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 sulphate in the form of gypsum or anhydrite. The addition of sulphate reduces shrinkage and enhances compressive strength and durability.
The invention provides a recycled aerated concrete block. Recycled concrete powder substitutes 25-50wt% of sand to make the recycled aerated concrete block, and the silicon content of the recycled aerated concrete block is controlled at 51.9-71.6wt%. Comprehensive strength, dry density and drying shrinkage tests prove that the recycled aerated concrete block accords with technological stands ...
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. Recycled AAC aggregate can replace up to 40% of the sand fraction in floor screed.
Apr 15, 2019· To recycle waste autoclaved aerated concrete (WAAC) and minimize environmental pollution induced by Portland cement (PC), carbonation curing was performed on cement pastes containing variable replacement levels (0–50%) of waste autoclaved aerated concrete powder.
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Abstract. Xella Technology and Research, in a pilot study with the Hamburg-based Otto Dörner waste management company and the Ytong plant in Wedel, has been testing since 2013 how and in what amounts autoclaved aerated concrete (AAC) remains from demolished buildings or from waste disposal sites can be reused for new AAC production.
Recycling of autoclaved aerated concrete residues. Germany recycling leader. Autoclaved aerated concrete and mineral insulation boards consist of lime, sand, cement and water. For decades, they have been a popular wall material due to the characteristics in terms of thermal insulation.
Sep 23, 2019· GMT designed a low-cost alternative for below grade aeration using concrete beams instead of a continuous concrete pad to house the aeration piping. Each beam has nozzles imbedded just below the ...
Aluminum dust is a by-product of aluminum dross recycling industry. There is some metallic aluminum in aluminum dust from composition analysis. In this paper, aluminum dust is used as aerating agent to replace metallic aluminum powder for the production of autoclaved aerated concrete …
Resources & Environment High resource efficiency, low environmental impact. Autoclaved aerated concrete's high resource efficiency gives it low environmental impact in all phases of its life cycle, from processing of raw materials to the disposal of AAC waste.
Aug 28, 2006· The AirFloor is a patented in-floor aeration system which provides air through a concrete floor to the composting material. The finished surface allows heavy equipment to drive on and scoop off the floor with no risk of damage to the aeration pipes. AirFloor is designed to be simple to install...
Key-Words: Aerated concrete, fluid fly ash, lime, silica sand, autoclaved aerated concrete, autoclaving, X-ray diffraction analysis, tobermorite, recycling. 1 Introduction . Aeratedconcrete is a directly lightened inorganic composite material. Macropores are sealed and can form up to 80% of the total volume. Aerated ...
Autoclaved Aerated Concrete (AAC) Waste statistics in Germany Recycling and deposition of AAC in Germany Drivers for change in waste management Agenda Dr. Oliver Kreft · Xella Technologie- und Forschungsgesellschaft mbH · June 22, 2016 2 Recycling of Autoclaved Aerated Concrete (AAC) Methodology Results and discussion Summary and Outlook
Recycling materials whenever possible keeps waste out of landfills and takes no more effort than disposing of the waste. Old concrete blocks, which include cinder blocks and pavers, can be crushed, and the material can be used for filler in Portland cement. Homeowners with concrete blocks have a couple of different recycling options to choose from.
Oct 25, 2018· Making aerated concrete from building rubble In the best-case scenario, four clean aggregates may be recycled and reused to produce aerated concrete, a …
Mar 11, 2015· Scientists Have Reinforced Concrete With Plastic Waste Instead of Steel . FIONA MACDONALD . 11 MAR 2015 . Researchers from James Cook University in Australia have created a type of concrete that's reinforced by plastic waste, rather than steel. The technique, which is a first in Australia, will greatly reduce the environmental impact of ...
Aerated concrete blocks are made from a combination of sand, lime, water, gypsum, and cement. It provides structure, insulation, and fire and mold resistance. Blocks, lintels, wall panels, floor, and roof panels are some of the products made with aerated concrete blocks. Aerated concrete blocks are ...
Germany recycling leader. Autoclaved aerated concrete and mineral insulation boards consist of lime, sand, cement and water. For decades, they have been a popular wall material due to the characteristics in terms of thermal insulation. About 60 % of all waste in Germany account for mineral waste with approx. 210 million tons per year.
Global warming is a vital issue addressed to every sector worldwide, including the construction industry. To achieve the concept of green technology, many attempts have been carried out to develop low-carbon footprint products. In the construction sector, Autoclaved Aerated Concrete (AAC) has become more popular and been manufactured to meet the construction demand.
Hebel autoclaved aerated concrete delivers a large number of key environmental benefits. In fact, CSR Hebel has worked with Good Environmental Choice Australia and conducted a life-cycle ...
