Some studies con- cluded that water absorption of recycled coarse aggregate can vary in the range of 3-12%, which is compatible with the present study reporting an increase of 9% in water ...

Natural and recycled aggregates were used as the coarse aggregate in the concrete mixtures. Crushed natural granite was used as the natural aggregate and recycled aggregate (with >90% recycled concrete aggregate, approximately 8% of natural stone, 1% of c

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

Abstract. In this paper, we first show that the amount of residual cement paste in recycled concrete aggregates (RCA) depends on the initial paste content, on the mechanical properties of the initial cement paste and on the mechanical quality of the trans

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

During one day of carrying, the water absorption by RCA increased by 2.56% , which is important for the permeability parameters of this material. Recycled aggregates used in earth constructions are usually cheaper than the natural aggregates. Re-use of co

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'

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

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

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 (

For natural aggregates this is usually not a problem because they are not particularly porous and so have low water absorption potential. But recycled aggregates absorb far more water and it is imperative to compensate for this during concrete production.

Experimental Study of Compressive Strength of Recycled Aggregate Concrete - written by Yati R. Tank, Jigar P. Parmar, Darpan H. Gadhiya published on 2014/04/25 download full article with reference data and citations

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

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

Jun 30, 2011 · The project will use 10,000 cubic yards of 50% CCA and 50% virgin aggregate concrete. The mix also will include supplementary cementitious materials (SCM) and recycled water. Even though the aggregate has a 5% absorption rate, the 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,

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

Water absorption properties of recycled materials play an important role in pavement performance. The performance of aggregates changes after absorbing water, then it affects highways layers such as base, subbase, capping.

Recycled Aggregates Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% br

Moreover, in terms of RCA use will influence high water absorption of recycled aggregate, of concrete (Fumoto and Yamada, 2006). This is due to the migration of water absorbed by the aggregate to the paste around particles of aggregates, then, the water a

2018/7/19 · Capillary water absorption of concrete is closely related to its pore structure, permeability, and durability. This paper intensively investigates the effects of imposed damage, including freeze-thaw damage and loading damage, on the capillary

Recycled aggregate posses relatively lower bulk density, crushing and impact values and higher water absorption as compared to natural aggregate. The compressive strength of recycled aggregate concrete is relatively lower up to 15% than natural aggregate

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

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

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