Fine dredged marine sand on mortars

Title: Fine dredged marine sand on mortars
Author(s): J. Limeira, L. Agulló and M. Etxeberria
Paper category : conference
Book title: 2nd International RILEM Conference on Progress of Recycling in the Built Environment
Editor(s): V.M. John, E. Vazquez, S.C. Angulo, C. Ulsen
e-ISBN: 978-2-35158-122-3
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 91 - 101
Total Pages: 12
Nb references: 19
Language: English

Abstract: Dredged aggregates are commonly used in several coastal applications as erosive process control, coastal stabilization or beach replenishment. It can be also used in construction works (foundation fill, dikes) as construction materials (clay, bricks).

This work describes a study about the use of dredged marine sand (DMS) as construction material with pastes and mortars production. Samples were extracted from Sant Carles de la Rapita Port (Spain) with negligible contaminant level. Sieve analysis characterized it as fine material (90% passes through #250 μm) but negligible fine content was found (1% passes through #63 μm). DMS was subjected to no treatment, washing or drying process.

Pastes and mortars were made using CEM II/A-M 42,5R cement, different percentages of DMS on replacement of cement and raw sands NS1 0/2mm and NS2 0/5mm and plasticizer additive (in some cases). Experimental tests were carried out in order to evaluate DMS’influence on mixes behaviour with respect to cohesion, fluidity and strength resistance. The objective was assessing its behaviour as addition or as fine granular corrector. Results revealed strength resistance improvement in mortars compared to control mix. A percentage of 25% of DMS in substitution of raw sand revealed successful behaviour as fine granular corrector.

Online publication: 2012-02-08
Publication type : full_text
Public price (Euros): 0.00