Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

Comparative study of three types of fine recycled aggregates from construction and demolition waste (CDW), and their use in masonry mortar fabrication

This research aims to study feasibility of incorporation of fine fraction of recycled aggregates coming from construction and demolition waste in cement-based masonry mortar fabrication. Initially, three types of recycled aggregates: concrete, mixed and ceramic recycled aggregates, were characterize...

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Bibliographic Details
Published in:Journal of cleaner production Vol. 118; pp. 162 - 169
Main Authors: Martineza, PSaiz, Cortinaa, MGonzalez, Martinezb, FFernandez, Sanchezb, ARodriguez
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-04-2016
Subjects:
Aggregates
Cements
Construction materials
Masonry
Mechanical properties
Mortar
Mortars
Physical and chemical characterization
Recycled
Recycled aggregate
Sand
Waste treatment
Wastes
Mechanical properties
Recycled aggregate
Mortar
Waste treatment
Physical and chemical characterization
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Summary:This research aims to study feasibility of incorporation of fine fraction of recycled aggregates coming from construction and demolition waste in cement-based masonry mortar fabrication. Initially, three types of recycled aggregates: concrete, mixed and ceramic recycled aggregates, were characterized in terms of physical, mechanical and chemical properties. There were used 1:3 and 1:4 cement-to-aggregate proportions and replacement percentages of 50%, 75% and 100% respectfully for three types of studied recycled aggregates. Physical characterization of recycled aggregates shows a continuous size distribution curve, lower density and higher absorption, what makes the usage of additive necessary to obtain appropriate consistency. Main crystalline phases shown in the X-ray diffraction analysis were: calcite, quartz and gypsum. According to the results of the dosages study, recycled mortars present poorer behaviour than mortars fabricated using natural stand, however, complying with the limits established by the standards and manufacturers. Therefore, the results of this study suggest the possibility to replace 100% of natural sand with analyzed recycled aggregates. •High silicate content for three types of recycled aggregates, mainly calcium and aluminium silicates.•Better properties of recycled aggregates fabricated with CEM IV/B (V) 32.5 N than those fabricated with CEM II/B-L 32.5 N.•Bonding strength, compression and shrinkage tests results comply with EN standards.•Proper behaviour of recycled mortars in the crystallization of salts and frost resistance tests.•Feasible fabrication of recycled mortars using 100% of recycled aggregates.
Bibliography:ObjectType-Article-1
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ISSN:0959-6526
1879-1786
DOI:10.1016/j.jclepro.2016.01.059