This study investigates the enhancement of recycled concrete aggregate (RCA) surfaces with nano-TiO2 for an improved degradation of low-concentration sulfur dioxide (SO2). Nano-TiO2 particles, known for their photocatalytic properties, were uniformly deposited on RCA surfaces. Upon exposure to SO2 under light irradiation, the functionalized RCA …
Concrete masonry units (CMU) have been adopted by the construction industry owing to their excellent aesthetics and durability properties (Petrillo et al., 2016, Kishan and Radhakrishna, 2013).However, the production of its primary constituent, cement, is associated with the emission of nearly one ton of carbon dioxide per ton …
10.1. Introduction. Construction and demolition (C&D) wastes comprise waste generated from construction, renovation, and demolition of buildings, roads, and other infrastructures, and excavation of land associated with construction activities (QDERM, 2011).C&D wastes include a wide range of different waste materials such as …
The impacts of water, cement, fly ash, slag, sand, natural coarse aggregate, recycled coarse aggregate, superplasticizer, air-entraining agent, and the number freeze-thaw cycles on the freeze-thaw resistance of concrete are systematically analyzed using feature importance analysis, global interpretation and partial dependence analysis.
Recycled C&D materials, such as recycled concrete, recycled rock, recycled brick, reclaimed asphalt, and recycled glass, are increasingly being assessed for their suitability in various civil engineering applications, such as roads, pavements, footpaths and concretes [9], [10], [11].Incorporating these reclaimed materials into civil …
Table 1 below is from the Concrete Recycling Practitioner's Reference Guide (Snyder et al. 2018) and addresses many of the environmental concerns with simple planning and …
Quality and availability of recycled aggregate are the main factors towards stable use and introduction of recycled aggregate concrete to the construction industry. The crushed stone aggregate used in the study was obtained from a recycling plant which was established and directed towards reducing waste produced from the construction …
This study looked into recycling agro-industrial wastes into cement, such as sugarcane bagasse ash (SCBA), coal bottom ash (CBA), and others, to create sustainable and environmentally friendly ...
1. Introduction. Concrete is the second most used material by volume on Earth. Portland cement is the main binder of concrete, and its production (estimated at …
Introduction. Its versatility, ... Recycled concrete is characterised by replacing different percentages of natural coarse aggregate with recycled coarse aggregate (0, 20, 50 and ) and two ...
concrete aggregate and the specication of precast concrete made with recycled aggregate, which can be used in freezing and thawing circumstance with deicing salt are described. Keywords Recycle concrete aggregate · Recycle aggregate concrete · Demolished concrete · Freezing and thawing · Precast concrete
Relationships between recycled concrete aggregates characteristics and recycled aggregates concrete properties. Constr. Build. Mater., 108 (2016), pp. 163-174. ... Introduction to the use of recycled plastics in eco-efficient concrete. Use of Recycled Plastics in Eco-Efficient Concrete, Woodhead Publishing (2019), pp. 1-8.
Introduction Its versatility, favourable material properties and economic benefits makes concrete one of the most commonly used construction materials. Among the different …
For example, during highway construction, the demolished concrete from the concrete pavement can be crushed, and the recovered aggregate materials can be reused for constructing the same pavement (either concrete or asphalt) or recycled into new pavement construction (Albayati et al., 2018, Zhang et al., 2016). Such aggregates are …
Advanced Crushing Technologies: The introduction of more sophisticated crushing technologies has improved the efficiency and effectiveness of concrete recycling. These technologies are capable of processing a wide range of concrete types and sizes, producing high-quality recycled aggregates suitable for various construction applications.
In this paper, the durability of cement mortar prepared with a recycled-concrete fine powder (RFP) was examined; including the analysis of a variety of aspects, such as the carbonization, sulfate attack and chloride ion erosion resistance. ... In the following paragraph, a brief introduction to the research progress on the durability of ...
Recycled concrete can be used in various construction applications. It can be a base or subbase material in road construction projects. It provides a stable foundation, enhances load-bearing capacity, and contributes to …
For example, during highway construction, the demolished concrete from the concrete pavement can be crushed, and the recovered aggregate materials can be …
Specifically, the regulation 'only specific types of (non-hazardous) waste can be landfilled' could decrease dependence on landfilling, increase recycling and trigger supply of recycled concrete. Introduction of standards for recycled products from C&D waste could increase the acceptability level of recycled concrete in market and …
The application of recycled concrete in construction projects can make rational use of industrial waste and realize the renewable and effective recycling of natural resources [].The use of recycled concrete for construction can to a large extent improve the quality of concrete through new technology and equipment and reduce the waste …
Introduction. Use of recycled concrete aggregates - especially inert wastes - received particular attention by the scientific community, since it was shown that such materials may conveniently replace natural resources products in a variety of engineering applications. Of particular significance, enhancement of recycled materials …
An Overview of Existing Application of Recycled Concrete in. Introduction of standards for recycled products from CD waste could increase the acceptability level of recycled concrete in market and therefore stimulate demand and supply of this product. Some local governments have developed CD waste management in their administrative areas and ...
Introduction. Concrete is the most widely used material in construction projects. However, due to the acceleration of urbanization and the rapid development of construction projects, a substantial amount of abandoned concrete has resulted in severe environmental issues. ... Recycled concrete aggregates are obtained through …
For concrete with the recycled aggregates prepared by Method B, the compressive strength and splitting tensile strength of RA11B are significantly higher than those of RA32B. ... Kim et al. [53] improved the interconnectivity of steel or aluminum fibers through the introduction of easily fusible metals, which resulted in respective increases …
The compressive strength prediction of basalt fiber reinforced concrete filled with nano-silica and recycled aggregates can be done using a hybrid deep learning model suggesting the use of the combination of Convolutional Neural Networks and Long Short-Term Memory networks. The CNN captures microstructural features from SEM images, while the ...
Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, …
Snežana Marinković, Vedran Carević, in New Trends in Eco-efficient and Recycled Concrete, 2019. 10.1 Introduction. Recycled aggregate concrete (RAC) is an alternative to using natural aggregate (NA) in concrete. Recycled concrete aggregate (RCA) are …
The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for …
1. Introduction. Concrete has become the most widely used civil engineering material in the world because it is cheap, durable, very malleable and has excellent mechanical properties [1], [2], [3].Aggregates occupy about 70% of the volume of concrete [4], [5].High demand for concrete has also led to a high demand for …
Introduction Nomenclature RA Recycled Aggregate RAC Recycled Aggregate Concrete NA Natural Aggregate NAC Natural Aggregate Concrete C&D Construction and Demolition The need to become sustainable in construction has become apparent with the construction industry being a large consumer of natural resources. ...
3. Introduction Recycled aggregate are comprised of crushed, graded inorganic particles processed from the materials that have been used in the construction and demolition debris. These materials …
Recycled concrete means that you crush or pulverize the demolished concrete structure or structural elements and reuse the crushed concrete for future concrete construction works. Now, this process requires a serious of procedural steps and cannot be casually taken for granted. The aim of recycling concrete is not just to …
