Journal
JOURNAL OF CLEANER PRODUCTION
Volume 79, Issue -, Pages 124-133Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2014.05.053
Keywords
Concrete; Compressive strength; Mechanical properties; Durability; Recycled aggregates; Cement
Categories
Funding
- ENRESA (Empresa Nacional de Residuos Radiactivos S.A)
- Grupo Cementos Porland Valderrivas
Ask authors/readers for more resources
Recycled aggregates from construction and demolition waste have previously been used to manufacture recycled concrete. Generally, these aggregates weaken the physical properties of concrete, such as the density, durability, compressive strength, flexural strength, water penetration, and chloride penetration. This is predominately attributed to the porosity of particles with adhered mortar or to ceramic particles. In other studies, cements with additions (fly ash, slag, silica fume...) were used to compensate for the effect of incorporation of recycled aggregates. In another, plasticizers were used to improve workability or mechanical properties of recycled concrete. However, the innovation of this research is the use of different amounts of cement according to replacement ratios of natural aggregates for recycled concrete aggregates to achieved structural concretes. Also, two different water/cement ratios were used to analyse if these reached compressive strength similar to control concrete manufactured with natural aggregates. The results revealed that a small increase in the volume of cement (12%) maintained the mechanical properties and reduced the loss of concrete durability. Therefore, increasing the amount of cement in recycled concretes is a feasible technique in works with low exposure to aggressive agents. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available