Influence of moisture on the development of Delayed Ettringite Formation
ICAAR 2020-2022, 16th International Conference on Alkali-Aggregate Reaction in Concrete, Lisbonne, PORTUGAL, 31-/05/2022 - 02/06/2022
Characterization of Demolished Concretes with Three Different Strengths for Recycling as Coarse Aggregate
This paper presents a physical characterization for the recycling into new concretes of three comminuted concretes: C16/20 (“ordinary concrete”), C50/60 (“high strength concrete”), and C70/85 (“very high strength concrete”). The top size of the crushed concretes was 19.1 mm and the size range was 4.75 to 19.1 mm. The characterization was carried ou...
Improvement of Recycled Aggregates Properties by Means of CO2 Uptake
Concrete from deconstruction can have a second life in the form of recycled concrete aggregates (RCAs). They unfortunately have poor properties (high porosity and water absorption coefficient (WAC)) with respect to natural aggregates. Accelerated carbonation was implemented to improve the RCA properties and to increase their use by storing carbon d...
Compatibility of plants with a mineral binder
4th International Conference on Bio-Based Building Materials, Barcelone, ESPAGNE, 16-/06/2021 - 18/06/2021
Simulation of the Attrition of Recycled Concrete Aggregates during Concrete Mixing
Concrete mixing can lead to mechanical degradation of aggregates, particularly when dealing with recycled concrete aggregates. In this work, the attrition of such materials during mixing is studied by means of experiments and simulations. The effect of the presence of fines, water addition, flow configuration of the mixer (co- or counter-current) a...
Current Applications of Recycled Aggregates from Construction and Demolition: A Review
A literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) as well as its main uses as raw materials for the construction engineering sector. This review pays attention to the use of CD...
Joint inversion of electromagnetic measurements for the determination of water saturation profiles in concrete structure...
Water saturation profiles in concrete are essential to assess its durability and can be determined using non-destructive techniques, especially the electric and the capacitive methods. In this paper, we propose a new inversion scheme where both resistivity and permittivity measurements are inverted jointly to retrieve the saturation profile. The fi...
Compatibility of plants with a mineral binder
Hemp concretes are the most widely used biobased concretes in France. However, their growth is still limited by the lack of knowledge and high variability of the performances of biobased concretes, especially for their mechanical properties. These results are related to interactions between the mineral binder and plant compounds that modify the hyd...
Improvement of Recycled Aggregates Properties by Means of CO2 Uptake
Concrete from deconstruction can have a second life in the form of recycled concrete aggregates (RCAs). They unfortunately have poor properties (high porosity and water absorption coefficient (WAC)) with respect to natural aggregates. Accelerated carbonation was implemented to improve the RCA properties and to increase their use by storing carbon d...
Accelerated Expansion Test: France, IFSTTAR, in:chapter 8 Diagnosis and Prognosis of AAR Affected Structures : State-of-...
This test method covers the laboratory determination of the swelling potential and the residual free expansion of concrete extracted from structures affected by alkali silica reactions.
