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Properties Of Concrete

Eco-efficient cements: Potential economically viable solutions for a low-CO2 cement-based materials industry

Recycled aggregate from C&D waste & its use in concrete – A breakthrough towards sustainability in construction sector: A review

A review of recycled aggregate in concrete applications (2000–2017)

Review of LCA studies of solid waste management systems--part I: lessons learned and perspectives.

Recycling of waste concrete is one of the sustainable solutions for the growing waste disposal crisis and depletion of natural aggregate sources. As a result, recycled concrete aggregate (RCA) is produced, and so far it has mostly been used in low-value applications such as for the pavement base. But, from the standpoint of promoting resource and energy savings and environmental preservation, it is essential to study whether a concrete made of recycled aggregates—recycled aggregate concrete (RAC) can be effectively used as a structural material. The experimental research presented in this paper is performed in order to investigate the flexural behavior of RAC beams when compared to the behavior of natural aggregate concrete (NAC) beams under short-term loading and consequently the possibility of using RAC in structural concrete elements. Three different percentages of coarse RCA in total mass of coarse aggregate in concrete mixtures (0 %—NAC, 50 %—RAC50, and 100 %—RAC100), and three different reinforcement ratios (0.28, 1.46, and 2.54 %) were the governing parameters in this investigation. Full-scale tests were performed on nine simply supported beams until the failure load had been reached. Comparison of load-deflection behavior, crack patterns, service deflections, failure modes and ultimate flexural capacity of NAC and RAC beams was made based on our own and other researchers’ test results. The results of conducted analysis showed that the flexural behavior of RAC beams is satisfactory comparing to the behavior of NAC beams, for both the service and ultimate loading. It is concluded that, within the limits of this research, the use of RAC in reinforced concrete beams is technically feasible.

Flexural behavior of reinforced recycled aggregate concrete beams under short-term loading

Shear behaviour of recycled aggregate concrete beams with and without shear reinforcement

A database on flexural and shear strength of reinforced recycled aggregate concrete beams and comparison to Eurocode 2 predictions

Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete

This chapter is devoted to comparative environmental assessment of structural concrete made with recycled concrete aggregates and structural concrete made with natural aggregates. The results of life cycle assessment of concretes with three different types of aggregate: natural gravel, natural crushed and recycled concrete aggregate are presented. The influence of the transport phase and CO2 uptake during the life cycle of concrete structures are analyzed. Conclusions on eco-efficiency of recycled aggregate concrete compared to natural aggregate concrete and recommendations for future research are given.

Snežana Marinković

Papers

Flexural behavior of reinforced recycled aggregate concrete beams under short-term loading

Shear behaviour of recycled aggregate concrete beams with and without shear reinforcement

A database on flexural and shear strength of reinforced recycled aggregate concrete beams and comparison to Eurocode 2 predictions

Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete

Life cycle assessment (LCA) of concrete made using recycled concrete or natural aggregates