Effect of recycled fine aggregates on performance of Reactive Powder Concrete

Salahuddin, Hammad; Qureshi, Liaqat Ali; Nawaz, Adnan; Raza, Syed Safdar

doi:10.1016/j.conbuildmat.2020.118223

Cited by 66 publications

(26 citation statements)

References 47 publications

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“…Other uses of the RCA include: roads substructures, earth dam construction [35][36][37], paving blocks and structural blocks and bricks manufacture [37,38], bituminous-aggregate mixes [39][40][41][42], road pavements [43], self-compacting concrete [44][45][46], polymer concrete [47], shotcrete [48,49], concrete exposed to elevated temperatures [50], soil stabilization [51], pervious concrete [52], reactive powder concrete [53], artificial reef formation [37].…”

Section: Introductionmentioning

confidence: 99%

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

et al. 2020

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Sand has been considered to be something of an immeasurable quantity. There are many indications that this view is no longer valid and that the limiting of natural aggregates usage is doubly justified. Firstly, the extraction of natural aggregates is expensive and has a huge impact on the environment. The main issues in sand and gravel mining are the large areas that are affected, ground water level changes, illegal mining, unsuitability of desert and marine sand, and costs of transport. Secondly, metallurgical waste can be used as a substitute for natural aggregates. This is doubly beneficial—the waste is recycled and the use of natural aggregates is reduced. Waste is stored in landfills that take up large areas and there is also the possibility of ground and groundwater pollution by hazardous compounds. The research presented in this article focuses on the technological conditions of using metallurgical waste in its original form and as a component of recycled concrete aggregate (RCA). The use of metallurgical sludge waste or crushed or round RCA to produce concrete deteriorates the consistency and does not significantly affect the air content and density of the concrete mix. RCA lowers the density of hardened concrete. Metallurgical sludge waste or RCA usage adversely affect the absorbability and permeability of concrete. Concrete containing metallurgical sludge waste is of higher compressive strength after 7 and 28 days, with up to 60% of waste as a sand replacement. RCA concrete achieved higher compressive strength also.

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Section: Introductionmentioning

confidence: 99%

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

et al. 2020

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“…Adequately dispersed steel fibers serves as rigid constituents in the cementitious matrix for improving the mechanical behavior of reactive powder concrete, primarily elastic modulus, tensile strength, and ductility. Enhancing the microstructure by accelerating the hydration of cement as result of subjecting pressure at fresh stage and special curing regime [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Modified Reactive Powder Concrete with Waste Materials Powder Replacement

Radhi

Rasoul

Alsaad

2021

Period. Polytech. Civil Eng.

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Across the world, a huge amount of waste materials is deposited from different industrial or construction activities. Out of this massive waste quantity, a petite is recycled and remaining is dumped in vulnerable lands. This paper deals with the potential utilization of solid waste in reactive powder concrete, practically powdered glass originating from waste glass bottles and powdered ceramics tile from waste of construction process. First, the optimum ratio of waste pozzolanic material (ceramics to glass ratio) was obtained by pozzolinic activity test. Then, the optimal waste pozzolanic material was incorporated in reactive powder concrete at several substitution levels. The waste pozzolanic material in 5 %, 10 %, 15 %, 20 %, and 25 % were added in the reactive powder concrete mixes as fractional supplement of silica fume. Strength and water absorption of the modified reactive powder concrete were evaluated. A significant enhancement was observed in mechanical behavior of modified reactive powder concrete containing 15 % waste pozzolanic material. Results directed irrelevant raise in water absorption as increasing the waste replacement material.

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“…Salahuddin et al, [20] investigated the effect of two types of recycled fine aggregates on the mechanical and durability properties including: compressive strength, tensile strength, flexural strength, water absorption and sorptivity of RPC. The recycled aggregates were obtained from demolished normal strength concrete RNSC and reactive powder concrete RRPC and were replaced by (25%, 50% and 75%) from natural sand.…”

Section: Introductionmentioning

confidence: 99%

Effect of Steel Fibers on Properties of Modified Reactive Powder Concrete

Rasheed¹,

Aziz²

2021

ENGMATH

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This paper provides the result of an investigation to use of crushed brick as aggregates which was collected from the demolition waste of buildings from different sites then crushed with (maximum size 10 mm) in producing modified reactive concrete MRPC, which was presented by replacement the cementation binder (cement +silica fume) of original reactive powder concrete by 25% of crushed brick aggregates. The objective of this work is to study the effect of different type of steel fibers added in ratio 1% on the flowability and mechanical properties of reactive powder concrete and modified reactive powder concrete, which was micro steel fiber and hooked end steel fiber. The mechanical properties are examined by the tests of compressive strength, split tensile strength and flexural strength. The results showed that the compressive strength at 28 days of ORPC was 126.46 MPa, 120 MPa for the two types of steel fibers micro, hooked respectively. For the mix MRPC with micro, hooked the compressive strength at 28 days decreased by 1.53% and 1.15%, compared with those of the RPC made with micro, hooked steel fibers. And observed from the experimental results that two mixtures (RPC and MRPC) with micro steel fiber gave higher mechanical properties compared with the hook end.

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Effect of recycled fine aggregates on performance of Reactive Powder Concrete

Cited by 66 publications

References 47 publications

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

Mechanical Behavior of Modified Reactive Powder Concrete with Waste Materials Powder Replacement

Effect of Steel Fibers on Properties of Modified Reactive Powder Concrete

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