Innovative Recycled Aggregate and Fly Ash …
The rest of the mix consists of fly ash, slag, crushed recycled concrete for both coarse aggregate and sand, recycled concrete water, and admixtures. The air-entrained mix, with a water-cement (w/c) ratio of 0.45, attained an ultimate compressive strength exceeding 4000 psi and reasonable early strength.
Effect of Fly Ash on Recycled Aggregate Concrete
Finally, the drying shrinkage and creep of recycled aggregate concrete was found to be higher than those of natural aggregate concrete (Tavakoli and Soroushian 1996; Gomez-Soberon 2003) [11, 12]. Fly ash is known to be a good pozzolanic material and has been used to increase the ultimate compressive strength and workability of fresh concrete (Mehta 1985) [13].
Shear performance of reinforced concrete beams ...
The study reported in this stone investigates the shear capacity of full-scale reinforced concrete beams fabricated with high volume fly ash and coarse recycled concrete aggregate (RCA). The study involved testing 24 full-scale beams. The beams were fabricated with three different longitudinal reinforcement ratios of 1.27%, 2.03%, and 2.71%.
Permeability of recycled aggregate concrete …
Moreover, fly ash is economical, and there are numerous fly ash resources. In this paper, recycled concretes made with fly ash were studied. Clay stone waste was treated and used as a recycled aggregate. The permeability of RAC under different permeation medium was also investigated and compared with the permeability of natural concrete. 2.
Combined effects of recycled aggregate and fly ash …
Recycled aggregate concrete with fly ash presented slightly lower yield stress, but much lower stone viscosity. • Fly ash caused only a minor reduction in the strength of recycled aggregate concrete. • Recycled aggregate concrete with fly ash showed much higher chloride resistance than that without fly ash.
Combined Influence of Fly Ash and Recycled …
Recycled coarse aggregates (RCA) and fly ash (FA) are materials with least to very low global warming potential. Considering long term strength and durability, various studies have suggested to use RCA in concrete with FA.
Fatigue Durability of Stabilized Recycled Aggregate Base ...
Fatigue Durability of Stabilized Recycled Aggregate Base Course Containing Fly Ash and Waste- stone Strip Reinforcement Final Report Submitted to the Recycled Materials Resource Center University of New Hampshire Submitted by Dr. Khaled Sobhan and Mehedy Mashnad Department of Civil and Geological Engineering New Mexico State University ...
Green Concrete: Recycled Aggregate and Partial …
After comparing the strength parameter of recycled aggregate concrete mix proportion of different variation of fly ash i.e. 0%, 5%, 10%, 15%, 20%, it is found that concrete mix with 15% replacement of fly ash i.e. RAC15 has the maximum strength in recycled aggregates concrete shown in …
Use of Recycled Aggregate and Fly Ash in Concrete Pavement
Use of Recycled Aggregate and Fly Ash in Concrete Pavement DivyaVishnoi, Rajan Choudhary, Mukul Sharma, YogeshKumar Sharma, Vinod Meena Department of Civil Engineering Poornima Group of Institutions, Jaipur, Rajasthan Abstract: - Use of recycled coarse aggregate in concrete can be useful for environmental protection and economical terms.
Use of Recycled Aggregates in Construction
2 Use of Recycled Aggregates in Construction Contents EXECUTIVE SUMMARY 3 1 INTRODUCTION 6 1.1 General 6 1.2 Classification of Aggregates 6 2 MANUFACTURED AGGREGATES 7 2.1 Foamed Blast Furnace Slag (FBS) 7 2.2 Fly Ash Aggregates 8 2.3 Manufactured Sand 8 2.4 Polystyrene Aggregate 9 2.5 Expanded Clays, Shales and Slates 10 3 RECYCLED AGGREGATES 10
Use of recycled concrete aggregate in fly-ash …
Use of recycled concrete aggregate in fly-ash concrete Article in Construction and Building Materials 27(1):439–449 · February 2012 with 564 Reads How we measure reads
(PDF) Use of recycled aggregate and fly ash in …
PDF | On Jan 1, 2011, M.N. James and others published Use of recycled aggregate and fly ash in concrete pavement | Find, read and cite all the research you need on ResearchGate
Vol. 4, Issue 6, June 2015 Influence of Fly Ash as Cement ...
recycled coarse aggregate. In addition, fly ash was used as 10% by weight replacements of cement. The concrete mixtures were prepared with w/c ratio 0.43. This method in making recycled aggregate concrete can improve the strength of fly ash concrete made from 30% recycled aggregate concrete up to 6.23% by partial replacing 10% of
Shear Behavior of Fly-Ash-Incorporated Recycled …
Shear behavior of a reinforced concrete (RC) beam designed without transverse reinforcement is significantly influenced by the properties of concrete. This stone investigates the effect of fly ash incorporation as 20 and 30% of the total binder content in 100% recycled aggregate concrete (RAC) beams designed without stirrups.
Use of recycled concrete aggregate in fly-ash …
Highlights This research investigates the use of RCA as substitute of NA in fly-ash concrete. RCA is shown to be an efficient alternative material to natural aggregates. 30% replacement of NA by the RCA has found to be the optimum replacement level. FA-concrete with 30% RCA has exhibited a quite similar performance to NA concrete. Using RCA in blended cement concrete is more efficient than in ...
Recycled Concrete Sand | Sustainable Concrete …
Recycled Concrete Sand (PTY) Ltd is a dynamic innovative company based in Cape Town South Africa. The reduction in the sources of natural sand and the requirement for reduction in the cost of concrete production has resulted in the increased need to identify substitute material to sand as fine aggregates in the production of concretes especially in Concrete.
Compressive strength, pore size distribution and …
The effects of fly ash on the compressive strength, pore size distribution and chloride-ion penetration of recycled aggregate concrete were investigated. Two series of concrete mixtures were prepared. The concrete mixtures in series I had a water-to-binder ratio and a …
Influence of Fly Ash as Cement Replacement on the ...
The results showed that one of the practical ways to utilize a high percentage of recycled aggregate in structural concrete is by incorporating 25–35% of fly ash as some of the drawbacks induced by the use of recycled aggregates in concrete could be minimized.
Fly Ash Based Geopolymer Concrete with Recycled Concrete ...
Fly Ash Based Geopolymer Concrete with Recycled Concrete Aggregate Benjamin Galvin1 and Natalie Lloyd2 1Undergraduate and 2Senior Lecturer, Curtin University Synopsis: Concrete is one of the most consumed resources in the world.With an increased global focus on environmental concerns such as global warming, sustainable development and recycling; alternatives
Use of High Fineness of Fly Ash to Improve …
This study used high fineness of fly ash as a cement replacement to improve recycled aggregate concrete properties. The mixture proportions of recycled aggregate concretes were first prepared using 100% recycled coarse aggregate, and then river sand was replaced with recycled fine aggregate at 0, 50, and 100% by weight of the fine aggregate (river sand plus recycled fine aggregate).