Rezistenta betonului incepe cu Penetron PENETRON PENETRON ADMIX

Limba: Engleza

64 afisari

Tip documentatie: Catalog, brosura

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® T O T A T O T A LL C O N C R E T E PP R O T E C T II O N C O N C R E T E R O T E C T O N DURABLE CONCRETE STARTS WITH PENETRON ADMIX ™ Total Concrete Protection v Water above and below: Modera Coral Gables, Miami, Florida USA A 237-unit luxury apartment mid-rise building (with street-level retail shops), the Modera Coral Gables has six residential floors above three levels of parking and a large pool on the fourth floor. With a construction site 1.6m (5’) under the water table, PENETRON ADMIX was used on all below grade concrete structures; the three-level parking garage, the matt slab on grade and perimeter walls. The 4th-floor pool was also treated with PENETRON ADMIX. Leading performance specs Easily mixed in during batching and unaffected by climatic conditions, PENETRON ADMIX™ becomes an integral part of the concrete matrix and performs consistently during the life of the concrete. Constantly tested and improved, PENETRON ADMIX is designed to protect concrete in

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the most critical environments. PENETRON ADMIX ™ performance highlights • • Provides ‘self-healing’ capabilities for cracks up to 0.4 mm • Enhances the compressive strength of concrete • Non-toxic and contains no VOCs (NSF 61-certified for potable water applications) • Resists chemical attacks (pH3–11) • Significantly reduces chloride penetration and carbonation • Effectively counters alkali silica reaction (ASR) • Prevents corrosion of reinforcement steel • Not a vapor barrier; allows concrete to breathe • 2 Resists high hydrostatic pressure Protects against sulfate attack PENETRON ADMIX: The concrete solution PENETRON ADMIX is the world’s most efficient and economic permeability-reducing concrete admixture (PRAH), as defined by tests of the American Concrete Institute (ACI). As a true PRAH, PENETRON ADMIX provides comprehensive protection against concrete deterioration caused by chemical attack, freeze-thaw cycles and

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corrosion, while withstanding high hydrostatic pressure. Added during batching, PENETRON ADMIX can significantly increase concrete durability and service life. The PENETRON ADMIX benefits 1. Increases durability and life-span of concrete by 60 years or more 6. asy to mix into the concrete E during batching 2. liminates the need for any E surface-applied protection systems 7. on-staining tracer ensures N quality and performance 3. Saves money—lifetime concrete protection 8. oluble bag packaging eliminates S measuring and simplifies mixing 4. aximizes time on the construction site M 5. oesn’t require specific W/C or cement D content to perform Packaging: 9. Green” product that contributes “ points to LEED projects 10. o incompatibility issues with workability N admixtures, such as superplasticizers, retarders, etc. PENETRON ADMIX is available in different packaging containers: ➤ 18 kg (40 lbs.) bags ➤ 25 kg (55 lbs.) pails ➤ 3 kg (6.6 lbs.)

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soluble bags ➤ Bulk sizes 3 How does PENETRON ADMIX work? The science behind PENETRON technology PENETRON ADMIX consists of Portland cement and various active, proprietary chemical formulations. The active ingredients in PENETRON ADMIX react in a catalytic reaction with moisture in fresh concrete and by-products of cement hydration. This chemical reaction generates a non-soluble crystalline formation throughout the pores and capillary tracts of the concrete that permanently seals microcracks, pores and capillaries against the penetration of water or liquids from any direction. This protects concrete from deterioration, even under harsh environmental conditions. A MICRO SOLUTION FOR A MACRO PROBLEM. Because water and waterborne contaminants penetrate concrete mainly through capillary absorption and hydrostatic pressure, countering this problem demands a “molecular level” solution. PENETRON crystalline waterproofing technology was developed and optimized over many years thro

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ugh careful micro-engineering. The results speak for our success. magnification 5000 X A comprehensive renovation and upgrade of the foundations of the famous cathedral and the adjoining bridge – a popular Russian tourist destination – was carried out using PENETRON ADMIX to ensure freeze-thaw resistance. 4 v Durability in freezing weather: Cathedral of Christ the Savior and pedestrian bridge, Moscow, Russia v Distinctive and durable design: Strauss Daly Building, Durban, South Africa A modern and dramatic design, the Strauss Daly Building features large, off-shutter concrete planes that create a visually striking profile on a prominent hill above the ocean. The concrete used in the dramatic outside structure and belowgrade basement was treated with PENETRON ADMIX to protect against saltwater breezes from the Indian Ocean. This is how PENETRON technology works: Adding to a concrete mix 1. PENETRON ADMIX is added to the concrete at the time of batching. This disperses

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the PENETRON chemicals homogenously throughout the mix. 2. The PENETRON active ingredients react with water (and with calcium hydroxide, aluminum and other metal oxides and salts contained in the concrete) to form insoluble crystals, which fill in cracks, pores and voids up to a width of 400 microns (0.4mm). PENETRON ADMIX is an integral part of the concrete matrix; crystalline growth takes place throughout the concrete structure. 3. Water molecules (and harmful chemicals) can no longer pass through the concrete. However, air can still pass, allowing the concrete to breathe. This avoids the buildup of vapor pressure. 4. In the absence of further moisture, the PENETRON components lie dormant. Should moisture reoccur at any time, the sealing process resumes automatically, providing a fully self-healing concrete. 2 1 PENETRON ADMIX is added to the concrete at the time of batching. The concrete sets and has integrated PENETRON protection. 4 3 The crystalline technology is act

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ivated in the presence of moisture. The concrete structure is protected against moisture penetration. 5 Optimizing concrete for durability. A VERSATILE MATERIAL. Concrete is the world’s most Concrete is a hard and solid matrix, but also porous and common man-made material that has transformed subject to cracking. Waterborne chemicals can seep in modern cities around the world from a horizontal through pores, micro-cracks and capillary tracts, resulting landscape into vertical societies. in a wide range of problems that damage the concrete or the underlying reinforcing steel. The main challenges Corrosion Reinforcement steel embedded in concrete enhances tensile strength. Freezing & Thawing Water inside concrete turns into ice and expands. Chemical Reactions of the Aggregate The chemical reaction occurs over time between the alkaline cement paste and reactive non-crystalline silica in the aggregate. (ASR/AAR) Chemical Attack 6 Concrete is exposed to chemicals suc

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h as chlorides, sulfates and acids. Water (containing corrosive chemicals) penetrates through cracks, voids and pores. The expansive pressure causes cracking, scaling and crumbling of the concrete. The Alkali Silica Reaction (ASR), the most common form of Alkali Aggregate Reactions (AAR) causes severe expansion and cracking of concrete. These chemicals use water as a way to enter the concrete. Steel corrodes; the rust creates expansive pressure leading to cracking, delamination and spalling. Once started, difficult to determine extent of the damage to the steel reinforcements. The ice melts, water goes deeper into the concrete, the freeze-thaw cycle is repeated. Road salts and de-icing agents accelerate the deterioration process. When the aggregate expands, it forms a gel, which increases in volume by taking up water. The expansive pressure created causes cracking of the concrete. The chemical reactions lead to cracking, loss of mass and eventually failure. The concrete lose

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s strength and subsequently fails. PENETRON ADMIX: Breakthrough for enhanced durability. Test results show vast improvement in durability. Recently, a two-year research project was completed by independent labs to test the effect of PENETRON ADMIX on the durability of concrete. The test included compressive strength, drying shrinkage, permeability, sulphate resistance, chloride diffusion resistance, freeze-thaw cycle These test results show that PENETRON ADMIX completely eliminates the need resistance, self-healing ability, microscopic examination of crystalline for silica fume, corrosion inhibitors and formation and most importantly—a calculation of the improved service- air-entrainment admixtures. life of concrete treated with PENETRON ADMIX. Despite (ASTM C1556) test parameters that apply a chloride concentration 4.7 higher than true marine environments, the PENETRON ADMIX-treated concrete added up OVERVIEW of the TEST RESULTS to 60 years or more to the service life

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of conventional concrete (before the onset of corrosion). Individual Test A second chloride migration test Beneﬁts of PENETRON ADMIX vs. untreated concrete Additional Beneﬁts done with CEM III/A, an extremely durable concrete mix design, still yielded an additional 40 years of service life with PENETRON ADMIX. Drying & shrinkage (1 year length changes mm/m) Sulfate resistance changes (ASTM C1012-12) Chloride diffusion coefﬁcient (m2/s) (ASTM C1556-04) To achieve concrete durability, especially in critical environments, properties such as low permeability, low shrinkage and self-healing—protection against chemical attack must be realized. Freeze-thaw cycle length changes (%) (NCh 2185 Of 92) <24% Reduced shrinkage and cracking No internal expansion No cracking under sulfate attack <45% <10.53% of control sample Reduction of permeability (crack width) Compressive strength (Mpa) Extension in service life (years) Eliminates need for air-entrainment admixtures A

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ctivation of crystals reduces permeability (DIN 1048) Self-healing capacity Low chloride diffusion coefﬁcient prolongs service life of the structure ≤0.4mm 13% Up to 60 years (compared to control samples) Concrete self-heals new cracks Increases compressive strength Eliminates need for corrosion inhibitors 7 PENETRON ADMIX: The leading crystalline technology for durability. The only 3rd generation crystalline admixture. When PENETRON ADMIX is added to the concrete, it reduces permeability by permanently sealing microcracks, pores and capillaries, effectively protecting the concrete against water penetration and the effects of deterioration, even under high hydrostatic pressure. Now in its third generation, PENETRON ADMIX is continually optimized to ensure industry-leading performance. The strength, slump or setting time of the concrete are never affected. Getting durable concrete. The prime concern for concrete designers has traditionally been resistance to mechanical st

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ress, i.e. strength. In recent years, durability has become an equally important factor. Tests and experience have shown that durability cannot be achieved just with optimal W/C ratio, high compressive strength mixes or added cement / air integration. Adding up to 60 + years to the concrete lifespan. Concrete durability in critical environments is a result of low permeability, low shrinkage, selfhealing capabilities and resistance to chemical attack. PENETRON ADMIX delivers the technology to provide these properties. Recent test results show that PENETRON ADMIX can add up to 60 years to a variety of concrete, including CEM II/B-P, CEM II/B–S and CEM III/A, in critical environments before the onset of corrosion. Shelf-life in years before onset of corrosion Projected concrete service life (according to Fick’s Law) 8 100 90 80 70 60 50 40 30 20 10 0 94.8 years of service life 95.3 years of service life 38.8 years of service life Mix 1: Tested without PENETRON ADMIX

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Mix 2 & 3: Tested with PENETRON ADMIX v Extended Service Life: Recent breakthrough tests show that PENETRON ADMIX (as a ‘Permeability Reducing Admixture for Hydrostatic Conditions’) can extend the service life of concrete structures in severe environments by 60 years or more. v Elegant and durable: Arena Fonte Nova, Salvador, Brazil A FIFA World Cup venue adjacent to the Atlantic Ocean, the Arena Fonte Nova stadium is a multi-purpose complex for sports and cultural events with a 55,000-seat capacity, a 2,000-car parking garage, food courts and 12 elevators. The basement slabs and lower reservoirs were sealed with PENETRON ADMIX, ensuring a durable structure. v Durability: Central Train Station, Samara, Russia The new train station, built to replace the original 1876 building, features one of Europe’s highest railway buildings (93m / 307 feet) and a hotel. PENETRON ADMIX was used to waterproof all the below-grade structures (including the underground pedestrian tunnel, found

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ations and basements). 9 PENETRON ADMIX makes good concrete better. Increasing concrete performance A key characteristic influencing concrete durability is permeability by water, carbon dioxide, chloride, sulfates and other potentially harmful substances. Increasing durability by reducing the ingress of harmful substances, as shown by the examples below, underline how PENETRON ADMIX enhances durability by improving many aspects of concrete performance. While an optimal W/C ratio is crucial in achieving the desired overall concrete performance, permeability is crucial for concrete durability: decreased permeability means increased durability. PENETRON ADMIX reduces shrinkage cracking and seals micro-cracks. It provides self-healing of cracks (up to 0.4mm) over the service life of the structure. Finally, our admixture provides a 70% or more permeability reduction as per ACI guidelines for PRAH (permeability-reducing admixtures for hydrostatic conditions). Corrosion of steel Corrosi

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on is an electrochemical process that occurs with a difference in electrical potential of steel and the surrounding cement matrix. Chloride-induced corrosion of steel is one of the most important aspects of concrete durability. Concrete dosed with PENETRON ADMIX ensures huge reductions in rapid chloride permeability test (RCPT) values (as per ASTM C-1202 and AASHTO T-277 tests) by reducing chloride ion permeability. 10 Self-healing properties PENETRON ADMIX is hydrophilic product that reacts with moisture and concrete minerals to form crystals in cracks and voids. This gives concrete a permanent selfhealing capability. Whenever new moisture enters, PENETRON ADMIX develops new crystal formations that seal newly formed micro-cracks. Freeze / thaw resistance In cold climates, freeze-thaw cycles are a major factor in the deterioration of exposed concrete structures (bridges, roads, etc.). Water inside the concrete expands when it freezes, causing internal pressure; this leads to crackin

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g and the following thaw allows water to penetrate deeper into the newly formed cracks, then expanding again and causing further damage—as the cycle repeats itself. Tests of PENETRON ADMIX-treated concrete show a 90% reduction in length changes due to freezethaw cycles. Strength of concrete Depending on the design strength of the concrete, PENETRON ADMIX can increase compressive strength of concrete. Acid resistance When under acid attack, some projects face potential dissolution of the concrete matrix and a subsequent loss of structural integrity. PENETRON ADMIX offers protection against chemical attack (pH 3-11) and is the preferred and widely-used solution for wastewater treatment plants. Watertight development: Brickell CitiCentre, Miami, Florida USA In a huge project ( acres / 3.7 hectares) in Miami’s 9 financial district, PENETRON ADMIX treated belowground structures (and garage) at the saturated site. v Permeability Alkali silica reaction (ASR) v Susceptible t