D ECLARATION OF PERFORMANCE (DOP) AND CE MARKING OF CEMENT MORTARS MADE WITH RECYCLED STEEL WASTE
I. S ANTAMARÍA -V ICARIO , S. G UTIÉRREZ -G ONZÁLEZ , V. C ALDERÓN -C ARPINTERO AND A. R ODRÍGUEZ -S AIZ (2019). B UILDING & M ANAGEMENT , 3(2): 06-15
B UILDING & M ANAGEMENT
V OLUME 3 I SSUE 2 M AY - A UGUST 2019
Certificate of Conformity with Factory Production Control.Two
cement mortars were designed with these materials with the
technical label “dry industrial mortars” and with an identical
particle size distribution for aggregates; for which reason their
Fineness Module were also the same.
As indicated; the maximum aggregate size was 2.00 mm;
similar to the one used for conventional commercial cement
mortars. The dosage in weight used for the preparation of the
mixtures was 1 part of cement to 6 parts of aggregate.
Different admixtures are added to the mortars; so that they
are workable and can be used on building sites: a water
retention admixture [wr] and an air entrainment-plasticizer
[ap]; with the objective of reducing the exudation of water;
increasing its retention; reducing the density and increasing the
occluded air content of the mortars.
Figure 2. Particle size distribution for aggregates
The CE Marking of these aggregates; steelmaking slags; is
dependent on the Evaluation System 2+ and the harmonized
standard EN 13139:2002/AC: 2004 [20]. The manufacturer-
supplier of slag aggregate (EAFS-LFS) is expected to prepare
the Declaration of Performance of the Aggregate and its CE
Marking. A Notified Body will issue the corresponding
The siderurgic mortars [MS] are abbreviated as MSwr when
the water retention admixture is used and as MSap for the air
entrainment-plasticizer. The characterization in both the fresh
and the hardened state of the mortars is reflected in Table 3
and has been described in previous investigations [7-9].
Test method
Water/ kg dry mortar
(gr) [7]
Bulk density of fresh mortar (kg/m 3 ) [7]
Air content (%) [7]
Water retention (%) [7]
Workable life of fresh mortar
(min) [7]
MSwr
MSap
EN 1015-3 136 119
EN 1015-6 2103 2201
EN 1015-7 24 22
UNE 83-816-93 88 79
EN 1015-9 451 213
Dry bulk density of hardened mortar (kg/m 3 ) [7] EN 1015-10 1982 2080
Flexural strength at 28 days (N/mm 2 ) [7] EN 1015-11 2.8 3.6
Compressive strength at 28 days (N/mm 2 ) [7] EN 1015-11 10.6 11.5
Adhesive strength (N/mm 2 ) [7] EN 1015-12 0.62 0.64
EN 1015-18 0.15 0.16
EN 1015-19 15 9
EN-12371 (56 cycles) Without alterations Without alterations
Water absorption by capillarity
(kg/m 2 ·min 0.5 ) [9]
Water vapour permeability (µ) [9]
Durability – freeze/thaw cycles
[8]
Table 3. Mortars characterization
through a 0.125 mm sieve. Two mortar samples were
prepared of ‘MSwr’ and two of ‘MSap’.
6. E XPERIMENTAL . P ROCESS OF CE MARKING
An amount of 10gr±0.005 gr of the sample; milled at a
temperature of 20ºC±5ºC; was weighed out and poured into
a 150 ml polyethylene tube. Then; 100 ml of distilled water
was added; the tube was sealed and agitated in a magnetic
agitator with a polyethylene coated bar for 60 min. The tube
with its content was left to rest for (a minimum of 15 h and a
maximum of 24 h) one night.
In this section; the tests will be described that are required; in
accordance with the regulation; to complete the technical data
sheet of the mortars shown in Fig.1.
6.1. W ATER SOLUBLE CHLORIDE CONTENT
The procedure detailed in standard EN 1015-17 [21] was
followed to establish the water soluble chloride content.In
keeping with the requirements of a dry industrial mortar; the
sample was milled until it passed through a 10 mm sieve. Then;
the sample was reduced to 50 gr and milled until it all passed
Subsequently; the fraction of the sample that was in suspension
was separated by filtration; recovering the filtrate in a 250
ml borosilicate glass beaker. The residue remaining in the
filter was washed with 25ml±5 ml of distilled water. The
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