AREXAL® - Liquid X®

Product information "AREXAL® - Liquid X®"

Inorganic copolymer, the only liquid additive with more than 60 years of expertise for concrete/screed In concrete according to DIN EN 206-1/DIN 1045-2, only concrete admixtures according to DIN EN 934-2 or with general building inspection approval may be used.
Our product meets the DIN EN 934-2:2012 standard and is radon gas tight.

Product Description

Main uses: AREXAL®-liquid X is used to equip concrete for applications in structural and civil engineering with greater durability in structures historically prone to accelerated damage, to provide increased protection against corrosion of concrete steel, and to replace additional external waterproofing.
The entire concrete is WD (waterproof) and not just WU (water-impermeable) (WU=DIN= Penetration depth allowed up to 5.0 cm).
WU concrete is the abbreviation for water-impermeable concrete. This material and component, as long as there are no cracks or holes, secures the seal against water. It is important to know that in WU concrete, the water penetration depth to be demonstrated can be up to 5.0 cm.

With AREXAL®-liquid X, the penetration depth under permanent water pressure of 7 bar is at most 1.8 cm!

Typical applications include: heritage conservation, floor slabs, basement construction, highways, airport runways, parking garages, foundations, external walls and floor slabs in the ground, sewage treatment plants, underground vaults, tanks and pits, swimming pools, pressure mats, water storage tanks, tunnels, bridge structures (prefabricated and cast-in-place), curbs and gutters, sidewalks, manholes, catch basins, water parks, dams.

Hardened Concrete:

  • higher compressive strength (with the same spread and air pore content)
  • meets the requirements of ASTM C 494, chemical additives for concrete, Type A
  • positive effect on all physical properties
  • waterproof under hydrostatic pressure up to 7 bar, more than 100 psi (0.7 MPa).
  • results in a completely waterproof mass.
  • hard durable surfaces are resistant to sanding or chipping off
  • surfaces are also very resistant to breaking and wear
  • eliminates the formation of condensation in the pore matrix, resulting in excellent frost/thaw resistance

Composition and Chemical Components

AREXAL®-liquid X is an inorganic, copolymer, liquid additive for concrete, capable of chemically reacting with Portland cement, thereby improving the properties of concrete in all phases of its production, in the fresh state, during curing, and as finished concrete.

Sealing Effects

The most water-soluble components, calcium hydroxide and calcium-aluminum hydroxide (also referred to as free lime), are converted into the insoluble minerals, tricalcium silicate and tricalcium aluminum silicate. These insoluble minerals grow into the capillaries as very fine micro-crystals. Combined with the micro-pore structure, this results in a concrete mass that can withstand the penetration of water even under the highest pressures.

Long-term Durability

A large amount of macro-pores (found in normal concrete) are reduced in size to micro-pores in AREXAL®-liquid X concrete. About 3.8% of the mass of AREXAL®-liquid X concrete is occupied by these micro-pores. The micro-pores are hydrophobic and, although the system "breathes," condensation cannot form. This fact, combined with other physical properties of AREXAL®-liquid X concrete, results in a concrete matrix that is extremely durable even under the most adverse conditions.

Advantages of AREXAL®-liquid X Fresh Concrete:
  • contains no calcium chloride (or other chloride ions)
  • abrasion resistant (no sanding or wear of the concrete even after more than 40 years)
  • concrete with a lower spread is easier to mix, pump, and compact
  • lower water/cement ratio
  • very cohesive, therefore no voids and shrinkage cavities
  • less water separation (bleeding) and therefore faster finish
  • excellent workability due to better flow and smoothing properties
  • easy to pump
  • AREXAL®-liquid X reduces efflorescence
  • and shows increased resistance to chloride ion penetration - it does not wear out like a coating (AASHTO T259-78)
  • minimal separation during curing
  • significantly reduces shrinkage behavior
  • lower controlled development of hydration heat

Corrosion Resistance Independent on-site investigations and laboratory tests show that AREXAL®-liquid X concrete protects reinforcing steel from corrosion and thus permanently prevents concrete spalling!

Technical Data

Packaging: 10l canister, 25 l canister, 200 l drum, 1000-l one-way container
Shelf life: 3 years: protect from frost
Dosage: 1 wt-% based on cement weight = 0.9 l/100 kg cement

Macrocell Corrosion Test

Macrocell corrosion test after 48 weeks of alternating cycles of 4 days immersed in 15% NaCI solution and 3 days dried at 38°C, showed the corrosion current of AREXAL®-liquid X concrete, according to half-cell potential, values of chloride ion content, all of which were below recognized corrosion threshold values. After forty-eight weeks the slabs were destroyed, and no corrosion on the reinforcing steel was discernible.
Highway bridge study by Wiss, Janney, Elstner Associates, AG, February 1991, 1998.

Installation

AREXAL®-liquid X additive is added to the concrete on the construction site, in the ready-mix concrete plant, or in the precast concrete plant. Shake the canister very strongly so that settled crystalline in the container are completely mixed.

Procedure

Compare the delivery mix with the specification
Stir or shake AREXAL®-liquid X in the canister. Continue mixing until a uniformly white consistency is achieved.
Add AREXAL®-liquid X to the concrete mixer in the correct dosage (0.9 l / 100 KG cement)
Mix AREXAL®-liquid X in the concrete mixer truck at the highest speed for 5 minutes
Ensure that no additional mixing water is added. The concrete consistency must be set beforehand.
Addition of water at this point will negate the beneficial effects of AREXAL®-liquid X and may void the warranty.

AREXAL®-liquid X Specification

AREXAL®-liquid X is added to the concrete at a dosage of 0.9 l per 100 kg cement. After adding AREXAL®-liquid X to the mixer of a ready-mix concrete truck, the concrete must be mixed for five minutes at maximum speed. The concrete mix is planned, processed, and cured in accordance with the valid DIN regulations of the respective country.

Note: Normal procedures for processing concrete, as described in the ACI Manual of Concrete Practice, are to be followed when handling, placing, processing, and finishing AREXAL®-liquid X concrete. To achieve optimal mechanical properties, full compaction is necessary. Curing procedures, as described in the ACI Manual of Concrete Practice (latest edition), must also be followed.

Warranty

25-year warranty on all concrete parts treated with AREXAL®-liquid X. The prerequisite for the warranty is proper application!

Maintenance

Normal maintenance required for concrete structures also applies to AREXAL®-liquid X concrete.

Technical Support

You will receive support at any time from one of our many PAN-TECH technical consultants on-site, including training and instruction. Or telephone consultation, please call us for this.

Below is a summary of some of the tests conducted with AREXAL®-liquid X concrete.
Permeability of liquid X concrete compared to normal concrete, F(c)= 4000 psi (28 N/mm2) modified CRD-C 48-55 testing procedure. Reduction in penetration depth by 84%; reduction in volume of penetrated water by 98%.
Compressive strength, psi, ASTM C 39-Minimum 110% compared to reference concrete at 3-, 7-, 28-day samples
Flexural tensile strength, psi, ASTM C 78 3, 7, 28-day samples all determined values greater than comparison samples (same air content and spread)
Length change, ASTM C157 AREXAL®-liquid X approximately 25% less shrinkage
Adhesion to reinforcing steel, psi, ASTM C 234 Minimum 105% at 28-day comparison tests
Hydration heat, cal. /g., ASTM C186 AREXAL®-liquid X shows 13% less hydration heat
Capillary water absorption, % AREXAL®-liquid X has 48% compared to control concrete at 12 mm immersion and 44% compared to control concrete at 140 mm immersion
Frost-thaw resistance, AASHTO T161, 300 cycles 101.2% of control sample
Resistance of concrete to chloride ion penetration, AASHTO T259-78/T260-78 75% greater than control sample
Reduction in alkali-silica expansion reaction, %, ASTM C 441 47% less expansion than control sample
Content: 10 Liters
25 Liters
GHS: GHS 03 OxidizingGHS 05 CorrosiveGHS 08 Health hazard
Hazard Statements: H301 - Fatal if swallowed or in contact with skin
H302 + H312 - Harmful if swallowed or in contact with skin
H302 - Harmful if swallowed
Precautionary Statements: P260: Do not breathe dust/fume/gas/mist/vapours/spray.
P264: Wash ... thoroughly after handling.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P301+P330+P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water [or shower].
P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305+P351+P338: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
P310: Immediately call a POISON CENTER or doctor/physician.
Recommended Tools: work gloves
protective mask - FFP2
safety glasses
industrial mixing device with spiral stirrer
AREXAL® - Liquid X quantity-calculator

We would like to point out that the results of the quantity calculation only serve as a recommendation for ordering. It is important to note that actual order quantities may vary depending on demand and other factors.

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Dry mortar for plastering salt-laden, moist interior and exterior walls Binds the salts in the wall, no efflorescence anymore, no sacrificial plaster! AREXAL® restoration plaster white is a ready-to-use, white dry mortar according to DIN 18557, mortar group PII according to DIN 18550, for the preparation of a pore-hydrophobic, particularly diffusion-capable plaster for the renovation of old buildings. Application areas AREXAL® restoration plaster white is used for the permanent plastering of moist, mostly salt-laden masonry, and is therefore ideally used for the restoration of damp cellars, vaults, and historic building fabric. It achieves dry surfaces and prevents efflorescence and plaster spalling. AREXAL® restoration plaster white, with its lime content, is suitable for plaster restoration in the area of monument conservation. It is preferably used as an interior restoration plaster in rooms heavily burdened by moisture, and is also optimally suitable in both old and new construction. It balances the room climate and prevents condensation on the plaster surface. It transforms cellar mustiness into living room quality and keeps your walls dry. AREXAL® restoration plaster white is an essential accompanying measure to any type of horizontal barrier. Mode of action/Properties: AREXAL® restoration plaster white is a lime-cement plaster (mortar group PII) with low susceptibility to cracking and a favorable strength ratio is a hydrophobic pore plaster with particularly high water vapor diffusion is almost capillary inactive, thus does not transport water or salts thereby creates a salt-free and dry surface (dew point relocation) inward, prevents condensation) permanently prevents salt efflorescence, color and plaster spalling, is absolutely frost and salt resistant, promotes the drying of moist, salt-laden structures is not a dehumidifying plaster is very suitable for machine processing (plaster machine). Certificates Test report No. 958/94 Dr. Böttcher/ Hamburg, Laboratory for Building Materials Requirements Fresh Mortar Consistency 15.3 17.0+0.5cm Bulk Density 1.36 kg/l none Air Void Content 25.5 Vol% >25 Vol% Water Retention Capacity 97.75% 85% Workability 1.7 cm < 3 cm Hardened Mortar Bulk Density 1.33 kg/l 1.40 kg/l Water Vapor Diffusion 9.5 < 12 Compressive Strength 4.9N/mm2 1.5-5N/mm2 Ratio: Compressive/Bending Strength 2.3 < 3.0 Capillary Water Absorption W24 0.8kg/m2 0.3 kg/m2 Water Penetration Depth after 24 Hours 2 mm < 5 mm Porosity 49.8 Vol% > 40Vol% Salt Resistance passed passed Storage dry, on pallets or wooden racks Shelf Life max. 6 months Delivery Form 30 kg bag Quality Monitoring External monitoring possible; self-monitoring by IPA laboratory Technical Data Material Base mineral binders, quartz sands Appearance white Processing Time 25-40 minutes Processing Temperature not below 5 degrees (material temperature) Consumption approx 13 kg/m2 per cm of plaster thickness Minimum Plaster Thickness 20 mm Thickness cm Lambda W/mK Water Vapor Diffusion 2.0 0.350 8.8 3.0 0.350 8.8 4.0 0.350 8.8 Processing Preliminary Treatment Remove the existing plaster or bond-disrupting substances down to the raw masonry (up to twice the wall thickness, at least 50 cm beyond the visible moisture limit). 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If the surface is dry, it should again be pre-moistened. Restoration Plaster Mixing instructions: Pre-place 5 l of clean, cold water in a mixing bucket, sprinkle in the contents of the bag (30 kg), mix intensively and homogeneously in a suitable mixer. Water consumption with a suitable plaster machine (e.g., G4) is about 220 l/hr. Mixing Time Forced-action mixer about 5 minutes. Free-fall mixers are poorly suited and require significantly longer mixing times. To avoid mixing errors, prepare at least one full bag content. AREXAL® restoration plaster white is usually applied 2–4 days later. For base plaster thicknesses over 2 cm, an additional waiting time of 1 day should be considered (WTA). The restoration plaster mortar is vigorously hand-thrown or processed mechanically. A minimum layer thickness of 2 cm is mandatory. 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