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Showing 1 to 20 of 20 for “"recycled concrete aggregate"”.
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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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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
… adequate sources due to the shortage of natural 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 …
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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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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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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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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
… concerns and lack of a sustained source of aggregate resources, 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 …
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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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HYDRAULIC COMPATIBILITY OF GEOTEXTILES FILTERING RECYCLED MATERIALS
Large amounts of natural aggregate and manufactured materials are needed every year to support highway construction and rehabilitation in the United States. It is important that new construction materials be developed to improve the performance of highway systems, while at the same time providing …
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Comparison of Biofilm Media in Reciprocating Biofilters Treating Dairy Flushwater
… substrate used to attach biomass was rock aggregate; this media may be hard to obtain for some agricultural projects, so alternate substrates are tested and compared with the rock aggregate. The purpose of the study was twofold: first, different biofilm media were tested and compared in …
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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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Performance evaluation of unconventional aggregates from primary and recycled sources for construction platform and low volume road applications
Unbound aggregate layers are frequently used as remedial alternatives for weak subgrade soils. With the recent focus on sustainable construction practices, ever-increasing transportation cost, and scarcity of natural resources, nontraditional and locally available recycled materials have become …
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Sustainable Material Solution for Flexible Pavements; Performance Evaluation and Impact Assessment of Utilizing Multiple Recycled Materials in HMA
… of natural resources. Beneficial utilization of recycled materials can result in an important opportunity to save the mining and use of virgin materials, to preserve energy, and to save landfill space. Two main research questions addressed in this study are: (1) How much pollution, energy, …
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Recycling Concrete for Sustainable Construction
The demolition of concrete structures has made concrete debris the largest portion of the waste stream in the U.S. With landfills becoming scarcer, the need to recycle demolition debris is becoming increasingly relevant. An effective way to recycle this material is to produce recycled concrete …
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Effects Of Fiber And Lithium On Mechanical Properties Of Concrete Made Fromrecycled Concrete Aggregate
The growing demand of construction aggregates has raised concern about the availability of natural aggregates. Over two billion tons of natural aggregate are produced each year in the United States and that number is expected to increase to 2.5 billion tons by 2020. This has raised concern about …
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Predictive Modeling and Durability Analysis of Low Carbon Concrete Incorporating Recycled Materials
Increasing environmental demand for low carbon concrete materials has developed significant interest in the use of industrial by-products and recycled materials towards minimizing the environmental impact of concrete production processes. This dissertation investigates the use of recycled concrete …
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Interfacial transition zone composition and bonding in cementitious materials with asphalt-coated particles
… (RAP) as a partial replacement of coarse aggregate in concrete paving mixtures has seen recent interest as a result of significant availability of stockpiles of RAP materials. While previous research has primarily focused on the mechanical and durability properties of concrete with RAP …