water absorption of recycled concrete aggregate

Compressive Strength and Capillary Water Absorption of

capillary water absorption, and density tests conducted on concrete containing recycled aggregate (RCA) which is obtained from structural waste generated by the construction industry in Turkey. In the experiments, 0%, 15%, 30%, 45% and 60% of the normal (

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Use of Recycled and Waste Materials in Cement Concrete with

The water absorption of recycled concrete aggregate is higher than natural aggregate which results in an increase in water cement ratio to get required workability of concrete. The resistance of recycled aggregate to mechanical actions i.e., impact and cr

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Study of recycled concrete aggregate quality and its relationship

When recycled aggregate absorption is low (under 5%), pre-soaking or adding extra water to avoid loss in workability will negatively affect concrete strength (due to the bleeding effect), whereas with high water absorption this does not occur and both of

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Water absorption variability of recycled concrete aggregates

with coarse recycled concrete aggregates (CRCA) in concrete of strength class C25/30. Recycled concrete from building demolition is a heterogeneous material, resulting in a higher standard deviation of many properties of CRCA. One of the important propert

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Recycled Concrete Aggregate from C&D Wastes

As will be elaborated later on, recycled concrete aggregate (RCA) is characterised in specifications by its density and water absorption, among other characteristics (5). Another property is alkali aggregate reactivity. Recycled concrete aggregate, which

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Prediction Adequacy of Creep of Recycled Concrete Influenced

This article investigates the influence of RCA and its water absorption content on the creep properties of concrete and develops a model to predict the creep of recycled aggregate concrete (RAC). Two types of RCA obtained from the lab and field with diffe

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Measurement of Water Absorption of Very Fine Particles Using

the water absorption of recycled aggregates named “real-time assessment of water absorption.” The new approach provides an easier way to obtain the water absorption at different time intervals and without the need of soaking and drying the recy-cled coars

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Recycled aggregate concrete - SlideShare

Nov 15, 2017 · LITERATURE SURVEY Limbachiya and Leelawat (2000) found that recycled aggregate concrete had 7 to 9% lower relative density and 2 times higher water absorption than natural aggregate. According to Bodin and Zaharieva, precautions must also

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Cement paste content and water absorption of recycled concrete

2013/7/3 · Our results suggest that water absorption of RCA at 24 h can be seen as the simple sum of the capillary absorption of both residual ... Workability and compressive strength properties of concrete containing recycled concrete aggregate. In: Dhir

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Using Fine Recycled Concrete Aggregate for Mortar Production

Using Fine Recycled Concrete Aggregate for Mortar Production situation occurred in the Silva, Bavaresco6 et al. 4 and Pedrozo8 studies. Most studies consulted found that water retentivity of fresh mortar made with recycled aggregates was lower. Since they

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(PDF) Water absorption variability of recycled concrete

Water absorption variability of recycled concrete aggregates Article (PDF Available) in Magazine of Concrete Research 67(11):592-597 · June 2015 with 1,182 Reads How we measure 'reads'

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Crushed Concrete Aggregates - Properties and Uses of Recycled

4. Water Absorption . Water absorption of recycled aggregate is greater than of natural aggregate. It is one of the most significant properties that distinguish recycled aggregate from raw aggregates. Water absorption of recycled aggregate influence both

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Influence of the incorporation of recycled coarse aggregate

It could be obviously observed that the depth of water penetration into recycled aggregate concrete at the elapsed time of 24 h is greater than that for chloride transport. This result was similar to the previous studies regarding the ordinary concrete wi

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Residue strength, water absorption and pore size distributions of

Residue strength, water absorption and pore size distributions of recycled aggregate concrete after exposure to elevated temperatures Author links open overlay panel Shi Cong Kou a b Chi Sun Poon a Miren Etxeberria c Show more ...

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Mechanical Properties of Recycled Aggregate Concrete at Low

This paper presents an experimental research on mechanical properties of recycled aggregate concrete (RAC) at low and high water/binder (W/B) ratios. Concrete at two W/B ratios (0.255 and 0.586) was broken into recycled concrete aggregates (RCA).

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Water Absorption Study in Recycled Aggregates for Use as

Stone had the higher densities than other mixes and water absorption value of 100% RCA was about 40% higher than 50% RCA + 50% RAP in 31.5 mm - 4 mm fraction. Keywords Water Absorption, Recycled Aggregate, Reclaimed Asphalt Pavement, Density, Subbase Subj

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Mix Design and Properties of Recycled Aggregate Concretes

Aug 26, 2014 · In spite of the high water absorption capacity of the used RCA, it remains within the range recommended by the design standards (McNeil and Kang 2013; Kang et al. 2014). The kinetic of water absorption of recycled aggregates GR 1 and GR 2

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Recycling of construction and demolition waste as natural

Therefore, this research developed three techniques to reduce the effect of high recycled aggregate water absorption on concrete characteristics: Pre-saturation of recycled aggregates, to lower aggregate water capture and obtain sufficient workability, by

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What are the limits of water absorption of coarse aggregate

Oct 28, 2018 · Max water absoption limit for coarse aggregates in any climatic condition should not be more than 2%. And for fine aggregates range varies from 0.3–2.5%. Max permissible limit of fine aggregates is 3%.

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Recycled Aggregates

According to a 2004 FHWA study, 38 states recycle concrete as an aggregate base; 11 recycle it into new portland cement concrete. The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to conc

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Water absorption limits on aggregates - The Concrete Society

Water absorption limits on aggregates. Limits on aggregate water absorption are rare though they may be useful to link to an undesirable concrete property, such as freeze-thaw susceptibility, as water absorption is easily determined. Historically it is no

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Strength and Durability Evaluation of Recycled Aggregate Concrete

May 14, 2015 · 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,

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Mechanical and Durability Properties of Concrete Produced

that the properties such as density, water absorption, specific gravity, and crushing value have a negative influence on recy-cled aggregate concrete quality. Grabiec et al.9 concluded that the method of bio-deposition of calcium carbonate improved the qu

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Study of recycled concrete aggregate quality and its

and the mixing procedure (pre-soaking or adding extra water) influence the recycled concrete strength of dif-ferent categories (high or low water to cement ratios). When recycled aggregate absorption is low (under 5%), pre-soaking or adding extra water to

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Use of Recycled Aggregate Concrete

aggregate as well as for the recycled aggregate. The use of recycled aggregate generally increases the drying shrinkage creep & porosity to water & decreases the compression strength of concrete compared to that of natural aggregate concrete. It is nearly

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