http://www.acksol.com The laboratory of engineering and environment IMASA, has produced a report of the results of  the test carried out on two samples: a cylinder of reinforced concrete from a structure of 50  years old with carbonation.  The untreated sample essay gives a pH 8.8, so, below the critical pH 

1.
ALKALINITY
RECOVERY TEST

2. ALKALINITY RECOVERY TEST
AC‐KSOL INGENIERIA Y APLICACIÓN S.L.
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1
ALKALINITY RECOVERY
One of the most serious and common pathologies in concrete is carbonation. With the passage
of time external agents, and in particular the ambient humidity, penetrate through the capillary
network of structures, accessing the inside of the concrete, by capillary action: coating concrete
loses alkalinity that keeps the reinforcement protected.
Therefore, this loss of alkalinity (pH of concrete down) below a critical value located around 9.5
cannot guarantee the reinforcement protection, and then, start the pathologies: corrosion of
reinforcement, reinforcement section loss, which decreases the resistance of the concrete and
durability, so the remaining useful life of the structure is significantly shortened
Structure of concrete with pathologies
Carbonation is a process linked to the concentrations of CO2 present in the air, the presence of
humidity and ambient temperature. If there is a direct access to the inside of the concrete,
would not occur the carbonation process, which would avoid the oxidation, appearance of
pathologies, etc. The ideal thing would be to completely seal the porous concrete network
access: This what we get with the CATALYZED NANO‐CRISTALLIZATION.
PASSING OF TIME,
EXTERNAL AGENTS
(AMBIENTAL
HUMIDITY...)
CARBONATION ↓ ALKALINITY
REINFORCEMENT
CORROSION
PATHOLOGIES:
• SECTION LOSS
•↓ RESISTANCE
• ETC
↓ DURABILITY

3. ALKALINITY RECOVERY TEST
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NANOCRISTALLIZATION PROCESS
The products that we use are nanosilicates. They penetrate through the pores and react with
the calcium‐free concrete and water into quartz, crystal sand, which filled all of the capillary
network. It creates a crystallized barrier that will prevent the entry of water, air,...
Our products are completely innocuous, mineral, and are based on the crystallization of silicate
of sodium (our product base) and free calcium Ca+ existing in most building materials, to become
small crystals internally that will prevent the passage of fluids through the interior of the same.
The performance of our products is based on several very basic concepts:
 They are nanofiltered until a product whose components have a molecular size  This
allows them to penetrate any micro‐pore or capillar of any material, by polishing or
vibrated it is.
 Your insight is based on capillarity and surface tension  It applies with low pressure
spray and a powerful mineral catalyst makes contact with the material into a gel that
will penetrate by capillary suction of the material up to 20 cm during the first 3‐4 days
to crystallize completely in 15 days more.
This will generate a network internal nanocrystalline should bring to concrete durability,
increased resistance and protection against any type of environment.
Internal representation of the nanocristallization CONTROLL®INNERSEAL, sodium nanosilicates
Also is achieved recover the alkalinity of the concrete, as shows the essay that is describes
below.
TEST OF RECOVERY OF pH IN CARBONATED CONCRETE IN A
STRUCTURE OF 50 YEARS OF LIFE.
The laboratory of engineering and environment IMASA, has produced a report of the results of
the test carried out on two samples: a cylinder of reinforced concrete from a structure of 50
years old with carbonation.
The untreated sample essay gives a pH 8.8, so, below the critical pH

4. ALKALINITY RECOVERY TEST
AC‐KSOL INGENIERIA Y APLICACIÓN S.L.
www.acksol.com
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After application of the nanocristalizacion with silicates of sodium, and within 21 days, with an
essay by dilutions have seen increasing the alkalinity of the concrete (pH 10.1) and therefore the
recovery of inhibiting's function own concrete on the reinforcement, to overcome the critical
barrier of 9.5.
(TEST OF COMPLETE REPORT IN ANNEX 1)

5. ALKALINITY RECOVERY TEST
AC‐KSOL INGENIERIA Y APLICACIÓN S.L.
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CONTROLL®INNERSEAL: Due to the high power of penetration of our solution (approx. 20 cm),
the product has sealed, permanently the pores and fissures up to 2 mm from the concrete,
preventing any filtration. All the pores of the concrete are filled in CONTROLL® INNERSEAL,
silicates of sodium, which reacts with the water and the concrete‐free calcios, and become a gel
of silicates of calcium, in 15 days, have solidified and have become a few glasses insoluble and
unchangeable.
With this test we can demonstrate the properties of the nanocristallization in our sector. With
test and the results obtained are summarized in the following graphic:
PASSING OF TIME, EXTERNAL
AGENTS (AMBIENT
HUMIDITY...)
APPLICATION OF
CONTROLL® INNERSEAL
STOPS THE CARBONATION
PROCESS
ALKALINITY RECOVERY
↑ RESISTENCE
↑ DURABILITY
"RENEWED" CONCRETE
ANNEX 1. REPORT OF TEST RESULTS: