This investigation aims to explore the feasibility of using Recycled Concrete Aggregate (RCA) as a partial replacement for Natural Aggregates (NAs) in the production of Hot Mix Asphalt (HMA) and Warm Mix Asphalt (WMA). As WMA technology, Iterlow T (a chemical additive) was selected.
RAP aggregates come from crushed and sifted pavement materials containing asphalt and aggregates, RAP aggregates are known to have some weaknesses, such as the dubious interrelationship of and recycled materials, so, with high RAP content, it is necessary to consider the proportion of mixture generated …
1.1. Tile aggregate concrete. Powder is used in place of the coarse aggregate, and crushed tiles are used in place of the fine aggregate [2].These crushed tiles and tile powder were used to replace the fine and coarse aggregates separately, as well as in combinations, such as the replacement of coarse and fine aggregates at the …
Aggregates constitute about 60-80% of a typical concrete mix. Now, research shows that it is possible to replace natural aggregates with RCA, as long as a relatively small amount of graphene is added. Long term, the viability of RCA concrete may also lead to more recycling of concrete.
The concrete mix design was conducted using the absolute volume method. Table 1, Table 2 show the obtained mixed design proportions for all concrete mixes. In addition, Table 3 shows the physical properties of the utilized recycled and normal aggregates. It should be noted that OPC mix refers to the control mix with …
Great Britain In Great Britain the normative distinguishes two types of recycled aggregates, RCA and RA, the former coming just from concrete-based material, characterized by a limitation of about 5 % in masonry content (in weight), and the second from a mixed waste. The complementary UK Standard to EN 206-1, BS 8500-2 2015 [], …
Currently, rubberized concrete is considered one of the most important green concrete materials produced by replacing natural aggregates with rubber particles from old tires in a concrete mixture.
Properties of recycled aggregate concrete designed with equivalent mortar volume method. Jeonghyun Kim, Łukasz Sadowski, in The Structural Integrity of Recycled Aggregate Concrete Produced with Fillers and Pozzolans, 2022. 16.3.1.2 Density and air content. Commonly, as the RA replacement ratio increases, the air content in the …
At present, recycled crushed concrete accounts for about 5% of all aggregate. About two-thirds of RCA becomes road base. Another 9% goes into asphalt, …
Coarse stone aggregate as a partial aggregate component was replaced by flake HDPE type plastic in 0, 25 and 50% replacement to coarse stone ratios. The compressive strength - unit weight of the ...
AbstractThe strength reduction associated with the replacement of the coarse aggregate in concrete with recycled asphalt pavement (RAP) limits the use of the RAP concrete to nonstructural applications. Recent research has suggested that RAP ...
The cement stabilized recycled aggregate mixture with recycled aggregate had lower mechanical sensitivity than that of the mixture without recycled aggregate, while the mechanical sensitivity ...
Abstract. 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 …
Recycled aggregates (RAs) for asphalt materials. Abbaas I. Kareem, Hamid Nikraz, in Advances in Construction and Demolition Waste Recycling, 2020 Abstract. Inclusion of recycled aggregates (RAs) in asphalt mixtures can reduce the depletion of natural aggregates (NAs) by providing an alternative material for hot-mix asphalt (HMA). Given …
The properties of recycled aggregate at different ratios—0, 15, 30, 45 and 60%—revealed that RCA is suitable for use as coarse aggregate. The optimum replacement percentage of recycled ...
From Fig. 9, it is seen that after incorporating the PP aggregate into the concrete mixture, the MoE decreases, and this reduction increases with increasing the percentage of PP aggregate. For the water-cement ratio of 0.35, the MoE of PP concrete is decreased by 21.6% and 25.6% for 10% and 20% PP aggregate compared to 0% PP …
Researchers started utilizing recycled plastic waste as green, light-weight aggregates to replace, in part or in full, the natural aggregates of concrete. Using PET in concrete structures has led to savings in concrete and steel quantities of up to 7.23% and 7.18%, respectively, depending on the structural configuration of the building [ 126 ].
After 28 days the concrete compressive strength improved to reach 109.2%, 107.99%, 105.73% and 103.65% for 25%, 50%, 75% and replacement of coarse aggregates by recycled aggregates; respectively. the compressive strength after age of 90 days, reached an increase by 9% at the full replacement of the natural aggregates …
The proportion of RHA replacing cement is 0%, 20%, 40%, 60%, 80% of cement quality, and construction waste recycled aggregate was used to replace 40% of natural aggregate. The main conclusions are as follows: the unconfined compressive strength and splitting strength with recycled aggregate decrease with the increase of …
Utilization of recycled concrete aggregates (RCA) as a replacement for natural aggregates in innovative concrete has gained fame around the world as a way to decrease natural aggregate use. ... FRCA and combination of both into the concrete mix with the replacement ratio 0%, 50%, and , respectively. He observed that the …
DOI: 10.1016/J.CONBUILDMAT.2021.123596 Corpus ID: 236242891; Performance evaluation of cement stabilized recycled mixture with recycled concrete aggregate and crushed brick @article{Zhang2021PerformanceEO, title={Performance evaluation of cement stabilized recycled mixture with recycled concrete aggregate …
Abstract. The main objective of this study is to implement ecological and sustainable principles in the design of concrete mixes by partially replacing normal …
There are numerous studies referred to the effective utilization of recycled coarse aggregates (RCA) in concrete (Khatib, 2005; Solyman, 2005; Fan et al., 2015). Nowadays, utilization of RFA as a replacement to fine aggregates in concrete is being popularised. Major sources for RFA are concrete, bricks, glass, bitumen from the …
Because of the replacement of natural aggregates with RA, shear resistance to high-temperature rutting of recycled aggregate asphalt mixture (RAAM) exhibits a considerable gap with that of natural aggregate asphalt mixture. ... Using RA in recycled aggregate asphalt mixture affects interfacial zone failure obviously during …
Abstract. This work is devoted to the study of fresh and hardened properties of concrete containing recycled gravel. Four formulations were studied, the concrete of …
FRCA was used directly in concrete, but CRCA was ground further in an abrasion machine. 30%, 60% and FRCA (as a replacement of fine natural aggregates (FNA) by volume) were utilised either with CNA or CRCA to study their effect on fresh properties (workability and density), mechanical properties …
Mix proportioning for recycled aggregate concrete the same volumetric ratios of the control mix was adopted for the recycled aggregate, however, since different grades of the recycled aggregate with different particle sizes were available, the following approach was considered in the current study: (i) in case of mixes contain grades 1 and …
Crumb rubber is used in concrete to generate rubbercr ete as a partial replacement for fine aggregate s. Compared to the f ine aggre gate it has a lower specific gr avity of 0.51 to 1,2 kg/m3 ...
Concrete made with different percentages of recycled aggregate (0%–, with increments of 10%) is investigated using mechanical and nondestructive testing of …
The samples were exposed to sea water with 3% chloride concentration and tested after 2 and 4 weeks of exposure. The results indicate that the density and air content of new concrete decreased with an increase in recycled aggregates content. Compressive strength decreased with the increase in the recycled aggregate content, and a concrete …
Although glass is a material that can be recycled, just 34% of waste glass has been recycled. The main reason why collected mix-color waste glass isn't recycled is due to its chemical composition. Typically, glass containers consist of sand, soda ash, limestone and cullet. ... Even if you don't replace all the mineral aggregates with glass ...
Using. cullet a s partial replacement aggregate in concrete has resulted in minor increases in c oncrete. consistence (workability) and minor reductions in compressive strength. W hen ground glass ...
The recycled mixture is comprised of 50% RAP in this study. The study simulated short-term ageing and long-term ageing as per the standard AASTHO R30 ageing protocols on the recycled mix. ... (RAP) in asphalt mixture to replace natural aggregate [1, 2]. The RAP content ranging between 10 and 30% is prevalent in road …
Tests and research done on this type of sustainable concrete proved the applicability of usage of recycled concrete aggregates as a full replacement of coarse …
For around 70 years, research has showed that using recycled aggregates (RAs) from CDW to replace natural aggregates (NAs) in new concrete application as …
This report examines the current status of and barriers to using Recycled Aggregates (RA) in concrete to replace Natural Aggregates (NA). RA are produced from CDW, while NA are extracted from natural resources.
At the 50% replacement level, the mechanical properties of recycled aggregate concrete (RAC) demonstrated a 20.0% increase in splitting tensile strength, …
A total of 18 concrete mixes were produced with different cement contents (350, 400 and 450 kg/m3) at W/C ratio of 0.4. Recycled glass was used to replace fine aggregate in proportions of 0%, 10% ...
Additionally, the proposed procedure for the concrete mixture design could recycle all concrete waste into the new concrete and replace all the natural fine …