R17 (High compressive strength Mortar)

[방수연구소장]

R17 Mortar
2-component methacrylic resin mortar with a high compressive strength and
tensile strength in bending. It is characterized by very low linear shrinkage.
Because of its high strength, the mortar is suitable as a wear-resistant concrete coating
for coating thickness of 6 – 20 mm. The low shrinkage rate enables even larger
unevenness to be levelled out. The mortar surface resembles that of a fine exposed concrete.
The hardening time is about 1 hour at +20 °C, and hardening takes place in temperatures
ranging from -10 °C to +35 °C(approx. 1 – 3 hours).
The very low viscosity enables rapid mixability and application to be achieved.
Application
Special areas of use are on floors for traffic areas in industrial concerns which are subject
to heavy mechanical stress and as a localized repair mortar for indoors and outdoors.
Greater coat thicknesses can be achieved by adding further coarse aggregates (e. g. for
ramps, rail bedding, filler and screed mortars, casting bridge bearings). Suitable coarse
aggregates include non-absorbent mineral particles (e. g. quartz gravel) in the proportions
listed in the table below.
For large-volume applications, individual gravel stones up to 30cm in diameter
can be inserted. However, these should not touch each other, as otherwise this place
will have an increased tendency to fracture.
Advice on application
The substrate generally needs to be pre-treated.
R17 mortar consists of R17 Powder to which quartz sand of particle diameter up to 1.8 mm
has been added and the watery methacrylic-based R17 Hardener Liquid.
The consumption of basic mortar mix is 25kg/m² with 20mm of coat thickness.
The mixing ratio is 15kg (1 sack) of R17 Powder and 1.7 – 2.2 litres of R17 Hardener Liquid.
You must not use more or less than these quantities of hardener liquid,
as they already cover the range from stiff to low viscous.
Under no circumstances should other untested additives be added to the mixture.
The exact coating thickness of 6 mm must be observed.
On unevenness which runs out to zero, cuts must be made in the edge area.
Thinner coats will result in reduced strength and hardening problems.
Mixing the reactive resin mortar
To produce the mortar mix, 1.7 – 2.2 litres of R17 Hardener Liquid (depending on the desired
mortar consistency) is added to the R17 Powder. Because of its thin, viscous consistency,
the mix can be easily prepared in a short time by means of a high-speed agitator, while
smaller quantities can be prepared manually. Mixes with coarse aggregates can also
be produced using low-speed forced agitators or in the normal concrete mixer. You must
ensure that the coarse particles are not added until the R17 Powder and  R17 Hardener Liquid
have already been mixed together.
The finished mortar is spread evenly by means of a doctor blade and smoothed or applied
using an aluminium lath and screed board. The boards should normally be made from
polypropylene strips (PP), as these can be easily detached from the mortar after hardening
and then cleaned.
The pot life at normal temperatures is about 12 – 14 minutes,
the hardening time about 60 – 90 minutes.
The values indicated will vary according to the ambient temperature.
Material calculator
PROPERTY				APROX. VALUE
Density of motor in the hardened state				2.15kg/cm³
Compressiv strength				65~75N/mm²
Appilication temperature				−10℃ bis  +35℃
Tensile strength in bending				27.5N/mm²
Modulus of elasticity				7,000N/mm²