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Showing 1 to 20 of 36 for “"Recycled Concrete"”.
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Mitigating alkali silica reaction in recycled concrete
<p>Concrete made with recycled concrete aggregate (RCA) that had shown alkali silica reaction (ASR) distress was evaluated. It was found that ASR mitigation was needed to prevent continued expansion. Several mitigation methods were evaluated and compared to conventional concrete using the testing …
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Quality improvement of recycled concrete aggregate using polymers
<p>Crushed concrete is one of the main resources for sustainable material. As this material should not be wasted, this research aims to assess the reuse of crushed concrete material as a resource of sustainable construction material. In this thesis, two types of polymer were mixed with crushed …
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Low Cycle Fatigue Behavior of Concrete with Recycled Concrete Aggregates
<p>A comparison of concrete containing recycled concrete coarse aggregates and natural coarse aggregates subjected to high strain, low cycle compressive fatigue is presented. Using a strain based feedback control loop, concrete cylinders are compressed at 15µε/s to a specified strain then unloaded …
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Characterization of Recycled Concrete for use as Pavement Base Material
The use of recycled concrete material (RCM) as pavement base material is a promising but unproven technique for road rehabilitation and construction. A telephone survey conducted to investigate the state of the practice concerning RCM usage in Utah County revealed that RCM is infrequently used in …
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Characterisation and behaviour of recycled concrete and bricks as engineered fill.
Demolition waste materials mainly consist of concrete and bricks and arise from the demolition of existing structures and buildings. Environmental and economical reasons make their recycling necessary but up to date little research has been undertaken to what is perceived as low level reuse of …
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Investigation on the Overall Performance of Recycled Concrete Affected by Alkali-Silica Reaction
Pressure is mounting in the concrete industry to adopt eco-efficient methods to reduce CO₂ emissions. Portland cement (PC), an essential concrete ingredient, is responsible for over two-thirds of the embodied energy of the concrete, generating about 8% of global greenhouse gas emissions. Extraction …
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Study of recycled concrete aggregate as filter media for phosphorus removal in synthetic wastewater
… removing phosphorus are expensive and complex. Recycled concrete aggregate (RCA) may be an alternative solution for phosphorus removal. It can reduce pollution and landfill disposal by converting construction waste into valuable products. This study aims to investigate the physical and chemical …
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Performance of composite sand cement brick containing recycled concrete aggregate and waste polyethylene terepthalate
… aggregate supply. Construction waste can be recycled to replace naturals resource or other competitive materials. This study aims to establish the sustainable properties for composite bricks using Recycle Concrete Aggregate (RCA) and Polyethylene Terephthalate (PET) waste bottles as sand …
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Utilization of fine recycled concrete aggregate and alternative testing for controlled low-strength materials
U of I Only Restriction Lifted for Item 109794 on 2021-02-08T10:15:32Z.
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Development and Structural Performance Assessment of Low-Carbon Concrete Using Recycled Concrete Aggregates and Secondary Materials
… the structural performance of low carbon concrete (LCC) developed with various proportions of recycled concrete aggregates (RCA) and supplementary cementitious materials (SCMs) as sustainable material alternatives to conventional concrete materials. Extensive materials testing and analysis …
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Performance of self-compacting concrete manufactured with coarse and fine recycled concrete aggregate and slag-based binder
El hormigón autocompactante es un tipo de hormigón caracterizada por su elevada fluidez, lo que permite que pueda ponerse en obra sin ningún tipo de vibrado y con un menor consumo de energía. La sostenibilidad de este material de construcción puede aumentarse mediante el empleo de materiales …
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The Effects of Aggregate Moisture Conditions in Rheological Behaviors of High-Workability Mortar Prepared with Fine Recycled-Concrete Aggregate
… of high-workability mortar (Self-Consolidating Concrete - SCC mortar). A mortar slump test and a mortar funnel test were also performed to evaluate the workability of SCC mortar. Fine recycled-concrete aggregate (FRCA) was used in this study in mixtures to replace natural aggregate at different …
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The Effect on the Durability Properties of Concrete of Partial Replacement of Natural Fine Aggregates with Recycled Concrete Fine Aggregates
Rapid urbanization and advancement in concrete technology in the world has led to excessive exploitation of natural sand resources for use in the construction industry. This excessive utilization has led to the depletion of natural sand resources; for instance, in countries such as India and …
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The use of aggregate from demolition rubble in the making of ordinary and structural concretes
… to introduce the concept of recycling demolished concrete as aggregate which is then used in fresh concrete - to be known as "recycled concrete". Various aspects of concrete technology are covered and in this way recycled concrete is compared to conventional concrete. The work was performed in …
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Recycling waste concrete into road pavement aggregate
The use of recycled concrete aggregate (RCA) as a road pavement material in Australia is relatively recent and confined mainly to Victoria and New South Wales. Samples of RCA were taken at six, monthly intervals from a local producer of RCA. A range of tests was carried out to provide initial …
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New building materials in structural engineering: “Structural concretes made with Coarse and Fine recycled aggregates”
With more than three tons per head, per year, concrete is the most important and widespread material used in construction worldwide. The Italian code allows the use of waste produced by construction and demolition (C&D) operations to produce recycled aggregates. The great interest, both …
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Effects Of Fiber And Lithium On Mechanical Properties Of Concrete Made Fromrecycled Concrete Aggregate
… of natural aggregate. Discarding demolished concrete into landfills is a costly solution from an economical and environmental point of view. Many U.S. highway agencies are re-using Recycled Concrete Aggregates (RCA) as construction material. The use of fiber reinforcement in Portland Cement …
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RCA: use and future possibilities
Reuse and recycling of concrete is essential for construction purposes. There has been progressive development in construction projects but at the same time it has an inverse effect on the environment. Concrete structures are built and demolished continuously all over the world, generating tons of …
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Equivalent CO2 Emissions and Construction Costs of Buildings Designed Using Recycled Aggregate Concrete
… have resulted in increased research dedicated to concrete produced with a variety of recycled and secondary materials. Despite the environmental benefits of recycled concrete aggregate (RCA), compared with conventional aggregates, the use of these materials often results in significantly lower …
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Evaluation of lower quality recycled PCCP for Portland Cement Treated Base (PCTB)
With recycled concrete aggregates (RCA) becoming a more popular and cost effective alternative to virgin aggregate, the Kansas Department of Transportation (KDOT) looks to incorporate these aggregates into Portland cement treated base (PCTB). KDOT currently practices a freeze-thaw method that …
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