Recycled aggregates and particularly, recycled concrete aggregate substantially affect the properties and mix design of concrete both at fresh and hardened states since it is known by high ...
Pervious concrete is a tailored-property concrete with high water permeability which allow the passage of water to flow through easily through the existing interconnected large pore structure. This paper reports the results of an experimental investigation into the development of pervious concrete with reduced cement content …
Hot mix asphalt (HMA) is a mixture of approximately 95% aggregates and 5% asphalt cement that is produced by mixing and heating the aggregates, recycled products, and asphalt binder according to precise engineering formulas. Once produced, HMA is transported by truck to the jobsite for use in a broad range of surfacing applications.
This study investigated the mix proportion design of recycled aggregate concrete (RAC) containing multi-source recycled aggregate (RA) based on machine …
Recycled concrete has grown its importance in the last few decades. This paper deals with building a Zero Emission Cycle by making use of recycled aggregate as a replacement of conventional ...
This paper explores the feasibility of using recycled fine aggregate in concrete to meet strength requirements for various applications in sustainable construction. The physical and mechanical characteristics including: aggregate strength, gradation, absorption, specific gravity, shape and texture, play crucial roles in determining …
The control concrete mix design with natural aggregates based on ACI method, was produced with the selected slump of 30–60 mm, maximum aggregate size …
AbstractRecycled aggregates extracted from the construction and demolition waste of brick and concrete building are mixed recycled aggregates (MRA), which comprise concrete recycled aggregate (CRA) and brick recycled aggregate (BRA). The components of ...
Keywords: concrete waste, completely recycled fine aggregate, concrete mix design, modified packing density method. 1. Introduction. With plenty of urbanization happening over the world, the construction industry gradually becomes the major consumer of the natural resources in the world. Thus, many developing countries face a shortage …
In this study, to investigate the usability of second RCA, five typical concrete mix-design methods were selected to prepare RAC with a service life of 50 years for freeze-thaw (F–T) environments in cold regions: the ordinary concrete design method, high-performance method, saturated surface-dry aggregate design method, equal …
10.1 Introduction. Recycled aggregate concrete (RAC) is an alternative to using natural aggregate (NA) in concrete. Recycled concrete aggregate (RCA) are aggregates …
The concrete mixtures were prepared using Ordinary Portland Cement (OPC) of 53 Grade conforming to Bureau of Indian Standard Specifications (BIS) (IS: 12269–2013) [93], Natural Coarse Aggregate (NCA), Recycled Coarse Aggregate (RCA), clean river sand conforming to grading Zone II (IS: 383–1970) [94] and potable water. …
This paper investigates the feasibility of using recycled concrete aggregate (RCA) as a replacement to the natural aggregates (NAs) in hot mix asphalt (HMA). RCA was collected from two different sources (new concrete cubes used for quality control testing during construction, and old demolished building) to investigate the impact of …
So, concrete mix design can be stated as Concrete Mix = Cement:Sand:Aggregates. The concrete mix design involves various steps, calculations and laboratory testing to find right mix proportions. This process is usually adopted for structures which requires higher grades of concrete such as M25 and above and large construction projects where ...
The mechanical properties of recycled brick aggregate concrete (RBAC) are significantly affected by design parameters such as recycled brick aggregate (RBA) replacement ratio and water-cement ratio, which not only increases the difficulty of designing RBAC by experimental or theoretical methods, but also makes the mechanical …
Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and mechanical characteristics must be investigated before use (Mills-Beale and You, 2010). As previously discussed, it is important to note that these properties would differ from the …
This study proposed a new mix design method for C30 recycled concrete with coarse recycled concrete aggregate (CRCA) from two mixed SC with different …
1. Introduction. Construction consumes large amounts of concrete, which gradually depletes natural sand and gravel resources [1].Globally, concrete production has reached 25 billion tonnes annually [2].At the same time, construction and demolition waste (CDW) is produced in massive quantities [3].For example, America and China generate …
Recycled concrete will have a higher absorption and lower specific gravity than conventional aggregates. To produce good quality, durable concrete containing a portion of recycled concrete aggregate often requires trial concrete mixes and close monitoring of the properties of the old recycled concrete, with mix adjustments made, as needed.
In this study, the performance of recycled materials crumb rubber as valuable substitute for fine aggregates ranging from 0% to in replacement of crushed sand in concrete mixes is investigated. An acceptable compressive strength was obtained with up to 25% by volume replacement of fine aggregates with crumb rubber.
For the past 20 years, recycled concrete aggregate from demolition and construction waste has been considered as an alternative to pure concrete in structural concrete to minimize the...
Results indicate a nuanced relationship between RCA replacement levels and concrete strength, with the optimal mixture at 25% RCA replacement (RCA 25) …
The main objective of this research is to investigate experimentally the effect of crushed and uncrushed coarse aggregate on the properties of hardened concrete (compressive strength) by adopting the American Concrete Institute (ACI) and the British Department of Environment (DoE) methods. Concrete mixes were designed, concrete …
High-quality recycled aggregates, when used in combination with SCMs, can lead to more substantial improvements in compressive strength than lower-quality aggregates (D. Wang et al., 2023). Recycled aggregate (RA) used in concrete presents a sustainable and environmentally responsible approach to construction material usage.
Recycled Concrete Aggregates (RCAs) are more porous because of Attached Mortar (AM). ... Mix design procedure for recycled aggregate concrete. Constr. Build. Mater., 4 (4) (1990), pp. 188-193. View PDF View article View in Scopus Google Scholar [18] I. González-Taboada, B. González-Fonteboa, F. Martínez-Abella, J.L. …
Use of recycled aggregate concrete (RAC) is one such attempt and is an answer to some of the problems in constructional engineering. The concept of using RAC is now gaining popularity and research in this direction has gained momentum. ... Concrete mix design for high strength self-compacting concrete using metakaolin. Materials & …
2.2 Mixing Method. Particle Packing Density (PPD) is a critical tool in concrete mix design, enabling engineers and researchers to develop sustainable and high-performance concrete mixes tailored for specific applications and project specifications (Panghal and Kumar 2023a, b, 2024a).This process involves the careful …
Recycled concrete aggregates (RCA) are used in existing green building composites to promote the environmental preservation of natural coarse aggregates (NCA). Besides, the use of RCA leads to potential solutions to the social and economic problems caused by concrete waste. It is found that insufficient information on the …
The volume of coarse aggregates. This part of the concrete mix design calculator informs the user about the bulk volume of the coarse aggregate per cubic yard of concrete. In addition, it shows the modification due to the placement conditions. ... This concrete mix design calculator has limits for the targeted compressive strength of 6000 PSI ...
This study investigates the potential of incorporating recycled fine aggregates (RFA) into sustainable concrete. In this research, a conventional compaction technique is utilized to establish the order of compressive strength and, consequently, to assess particle packing density in terms of weight within a specific cylindrical volume …
The materials utilized in the recycled aggregate geopolymer concrete (RAGPC) mix design exhibit variations compared to those employed in conventional concrete mix designs. These distinctions encompass details regarding the types and ratios of recycled aggregates, binders, and activators (e.g., sodium hydroxide, sodium …
Request PDF | Influence of recycled concrete aggregates from different sources in hot mix asphalt design | h i g h l i g h t s HMA containing several contents of RCA from different sources were ...
One such solution is the development of geopolymer binder with recycled aggregate concrete, which can reduce the consumption of ordinary Portland cement and natural aggregates. ... Mix design development of fly ash and ground granulated blast furnace slag based geopolymer concrete. J. Build. Eng., 20 (2018), pp. 712-722, …
DOI: 10.1016/j.jclepro.2024.141756 Corpus ID: 268470230; Mix design optimization of waste-based aggregate concrete for natural resource utilization and global warming potential