Journal ArticleDOI
Mechanical behaviour of concrete made with fine recycled concrete aggregates
Luís Evangelista,J. de Brito +1 more
TLDR
In this paper, the use of fine recycled concrete aggregates to partially or globally replace natural fine aggregates (sand) in the production of structural concrete is discussed, and the results of the following tests are reported: compressive strength, split tensile strength, modulus of elasticity and abrasion resistance.Abstract:
This paper concerns the use of fine recycled concrete aggregates to partially or globally replace natural fine aggregates (sand) in the production of structural concrete. To evaluate the viability of this process, an experimental campaign was implemented in order to monitor the mechanical behaviour of such concrete. The results of the following tests are reported: compressive strength, split tensile strength, modulus of elasticity and abrasion resistance. From these results, it is reasonable to assume that the use of fine recycled concrete aggregates does not jeopardize the mechanical properties of concrete, for replacement ratios up to 30%.read more
Citations
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Journal ArticleDOI
Recycled aggregate from C&D waste & its use in concrete – A breakthrough towards sustainability in construction sector: A review
TL;DR: A brief status of recycled aggregate concrete made from recycled aggregate, summarizes and critically analyses some of the most important research findings over the past few years regarding the material aspects is given in this article.
Journal ArticleDOI
Properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production
TL;DR: In this article, the authors examined the factors affecting the physical, chemical, mechanical, permeation and compositional properties of recycled aggregates sourced from construction and demolition waste, intended for concrete production.
Journal ArticleDOI
Comparative environmental assessment of natural and recycled aggregate concrete.
TL;DR: It is concluded that utilization of RAC for low-to-middle strength structural concrete and non-aggressive exposure conditions is technically feasible and the environmental impacts are slightly larger for RAC than for NAC but the total environmental impacts depend on the natural and recycled aggregates transport distances and on transport types.
Journal ArticleDOI
Durability performance of concrete made with fine recycled concrete aggregates
Luís Evangelista,J. de Brito +1 more
TL;DR: In this paper, different concrete mixes with increasing rates of substitution of fine natural aggregates with fine recycled aggregates from crushed concrete were prepared and tested, and the results were then compared with those for a reference concrete with exactly the same composition and grading curve, but with no recycled aggregate, drawing some conclusions on the feasibility of using this type of aggregate in structural concrete.
Journal ArticleDOI
Durability of recycled aggregate concrete
TL;DR: In this paper, the physical, mechanical and durability properties of concrete incorporating recycled aggregate are analyzed, and recommendable mixtures for recycled aggregates in aggressive environments are suggested based on the results obtained.
References
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Book
Properties of concrete
TL;DR: In this article, the authors present the following properties of concrete: Elasticity, Shrinkage and Creep, Durabilty of Concrete, Freezing and Thawing, and Chlorides.
Journal ArticleDOI
Properties of concrete incorporating fine recycled aggregate
TL;DR: In this paper, the properties of concrete containing fine recycled aggregate are investigated, and the results show that fine aggregate in concrete was replaced with 0, 25, 50% and 100% crushed concrete (CC) or crushed brick (CB).
Journal ArticleDOI
Influence of moisture states of natural and recycled aggregates on the slump and compressive strength of concrete
TL;DR: In this article, the influence of moisture states of natural and recycled aggregates on the properties of fresh and hardened concretes was investigated, and the results suggested that an AD aggregate that contains not more than 50% recycled aggregate is optimum for producing normal strength recycled aggregate concrete.
Journal ArticleDOI
Properties of concrete made with recycled aggregate from partially hydrated old concrete
TL;DR: In this article, a 28-day compressive strength of 28 MPa concrete was used as a source of aggregate for new concretes, simulating the situation prevailing in precast concrete plants.
Journal ArticleDOI
Influence of recycled aggregates on mechanical properties of HS/HPC
TL;DR: In this paper, the results of research on structural recycled high performance concrete (RHPC) are presented, where the aggregate obtained from crushing of such structures retained some binding abilities as may be activated by means of silica fume or fly ash admixtures.