UHPC Combat Betone für Bunker und Sicherheitsräume

Vor über 25 Jahren haben wir uns sehr viel mit der Sicherheitsindustrie und dem Militär beschäftigt.
Vieles erfolgreich versucht und einige interessante Projekte in der NATO durchgeführt. Dann war es für viele Jahre sehr ruhig und wir haben uns erfolgreich auf andere Projekte und Märkte konzentriert.

Seit mehr zwei Jahren werden wir wieder aus "nichtzivilen" Bereichen angefragt. Nun entwickeln wir unsere UHPC Sicherheitsbetone weiter in allen Bereichen, besonders für den Sicherungs- oder Bunkerbau, sowohl überirdisch, unter Wasser als auch unterirdisch. 

Bei der UHPC Materialentwicklung müssen wir die modernen Waffensysteme berücksichtigen. Es wurden einige hundert Tonnen von speziellen UHPC Binder von uns jetzt zum Testen und den schlimmsten Bedingungen versand.

Auch gibt es wieder Interesse an UHPC Material für zivile Schutzräume unterschiedlicher Belastungsart.

Besonders für das Verstärken von Standardbetonkonstruktionen eignen sich unsere UHPC Sicherheitsbeton sehr gut. Zur Zeit gehen wir mit den Festigkeitswerten für unsere Sicherheits-betonsystem am obersten Rand des möglichen.

Wir hoffen das die zuständige Zivilschutzbehörde schnellstmöglich ihre neuen Pläne vorstellen wird. Hier werden wir auf jedenfall neue Vorschriften und Materialtests erfüllen müssen.

 

UHPC HT and Refractory - The difference

UHPC HT Products

UHPC, Ultra High Performance Concrete, is a combination of a cement, micro particles and wear resistant (very hard) particles. Due to the 

micro particles it is possible to create a perfect physical packing ensuring improved chemical reactions. These chemical reactions secures the formation of minerals with superior properties at room temperature. Hence around 60% of the full strength will be obtained after 48 hours. Final strength of a UHPC is 100-250 MPa / 14500-36250 psi.

Water added to UHPC to secure a proper 

rheology is limited, and shortly after setting there will be no more free water in the system, as all water will be bond in the structure of the chemical reactions.

When heating UHPC HT the risk of cracking due to evaporation of water is limited. However too fast heating of a virgin installation could lead to this. Hence it is recommended to firstly heat up the installation at a rate of 50°C/hr. The heating does not contribute to the strength of the system however it will increase the rate of strength building.

Refractories

Unshaped refractories typically contains an alumina cement as the bonding material and other metallic minerals depending on the 

temperature and environment it is installed. Water is mixed in to create the right rheology for installation. As such this product at ambient 

temperature can be viewed as an ordinary mortar. As such the product is relative porous and strength at ambient temperature is not likely 

to exceed 45 MPa. This system will also reach around 60% of final strength after 48 hours of hydration.

This system will contain free water after installation, hence there is a risk of cracking when heated. Hence it is necessary to heat it at specific heating rate in order to avoid such cracks. In order for refractories to work they need to be heated so that the metallic minerals is calcinated 

and sintered into the wanted minerals with the needed properties.

Comparison

The strength and density of UHPC HT is a lot higher than that of refractories. Hence these products will be better at withstanding inner pressure from internal water evaporation, reducing the risk of cracks and ultimate process destruction of the product.

UHPC HT does not need heat to form the minerals needed in the mix in order to obtain the properties. 

Heat will however increase the rate of property formation.

 

Béton de combat en UHPC pour les installations militaires et anti-terroristes

Les dispositifs de protection, qu'il s'agisse d'objets civils ou militaires, contre les bombardements, les
attaques terroristes ou militaires sont toujours d'actualité.

Nous distinguons les protections fixes telles que les aérodromes, les messages, les centres de données, les quartiers généraux, les centres d'approvisionnement, etc., et les systèmes mobiles pour la protection des personnes, des équipements militaires, par exemple les propriétés, les postes d'observation, etc. en usage international.

Grâce à leurs propriétés uniques, les bétons à ultra-hautes performances (UHPC) peuvent assumer une grande partie de ces tâches. Le béton de combat UHPC peut être combiné avec pratiquement tous les matériaux. À partir de ces combinaisons, nous pouvons créer des propriétés uniques sur le plan technique.

Avantages

Résistance à la compression extrêmement élevée 200 - 300 MPa
En combinaison avec un renforcement intelligent, la résistance peut être multipliée.
Les constructions en béton de combat en UHPC sont capables d'absorber de lourdes explosions.
Les structures en béton de combat UHPC, avec la même épaisseur de mur que le béton standard, peuvent offrir 4 fois plus de sécurité.
Le béton de combat en UHPC a une résistance initiale extrêmement élevée par rapport au béton standard.
Le béton de combat en UHPC résiste à des températures élevées, jusqu'à 1200°C.
Résistance absolue à l'eau de mer
Constructions préfabriquées avec une très grande précision dimensionnelle
Amélioration significative de la résistance à la pénétration d'éclats à grande vitesse.
Protection élevée contre l'usure et la corrosion
     
Les systèmes de protection en UHPC sont utilisés comme

Protection des armes à feu
Armes à feu de différents calibres*.
Pistolets de différents calibres*.
   *Munitions : balles à enveloppe métallique pleine, balles creuses, balles à expansion, balles à haute  vélocité.

Construction de murs anti-éclats
Protection contre les voitures piégées à courte distance, les grenades à main, les explosions de petite et moyenne envergure.

Systèmes de sol
Systèmes de sols et de chaussées en UHPC présentant une résistance extrême à l'usure mécanique des véhicules lourds à chaîne en mouvement.

Système de bunker et d'abri militaire
Le UHPC spécial, combiné à des agrégats et des armatures spéciaux, offre une résistance extrême aux chocs contre toute attaque de bombe.

Domaines d'utilisation
AIRFORCE

Abri pour avion
Bunker de munitions
Pistes d'atterrissage
Réparation du terrain d'aviation
Abri anti-souffle
Bunker
Protection des bâtiments du terrain d'aviation
Installation spéciale de terrain d'aviation pour les jets à décollage vertical

NAVY
Protection des installations portuaires
Bunker de munitions
Bunker pour sous-marins
Cale sèche

Abri anti-souffle
Réparation de champs d'aviation
Installation spéciale de champs d'aviation pour les porte-avions
Bunker

ARMY
Planchers pour poids lourds extrêmes
Aires de stationnement
Plancher d'atelier
Revêtement de route
Bunker de munitions
Abri anti-souffle
Bunker

UHPC Compressive strength over 300 MPa / 43500 psi

"I need a UHPC building product with a minimum compressive strength of 310 MPa / 44960 psi, it should be easy, mouldable and flexible to process without special machinery". 

That was the requirement of a very special customer. We had already received and developed a similar requirement over 20 years ago. Special requirements are placed on us every day, but such extreme requirements and a corresponding demand of several hundred tonnes were already exceptional.

 

Here is a comparison with other standard building products:

Low Carbon Steel (e.g., A36): Low carbon steels, such as ASTM A36, typically have a compressive strength in the range of 250 MPa to 400 MPa. These steels are commonly used in construction and structural applications.

Austenitic Stainless Steel (e.g., 304, 316): These alloys are generally not very strong in terms of compressive strength and typically have compressive strengths in the range of about 200 MPa to 500 MPa.

Fiber-Reinforced Composites Composites reinforced with fibers such as carbon fibers, glass fibers, or aramid fibers can have very high compressive strengths. The compressive strength of these composites can range from 100 MPa to over 1,000 MPa, depending on the type and orientation of the fibers, the resin matrix, and the manufacturing process.

Particulate-Reinforced Composites Composites that use particles or powders as reinforcements, such as metal matrix composites (MMCs) or ceramic matrix composites (CMCs), can have compressive strengths ranging from 100 MPa to 600 MPa or more, depending on the type and volume fraction of the particles and the matrix material.

Natural Fiber Composites Composites made from natural fibers like hemp or flax combined with a resin matrix typically have lower compressive strengths, usually in the range of 20 MPa to 200 MPa.

Normal Strength Concrete (NSC) Typically, ordinary or normal strength concrete used in most construction applications has a compressive strength in the range of 20 MPa (about 2,900 psi) to 40 MPa (about 5,800 psi). This is suitable for most residential and commercial structures.

WPE-DK UHPC Dia 300 is a fibre reinforced castable UHPC concrete with a compressive strength of more than 300 MPa (about 43,500 psi) after 28 days. It is mixed in a pan mixer.

WPE-DK UHPC BlackBox Concentrate

The new WPE-DK UHPC BlackBox Concentrate System was developed by us to give our customers the flexibility
to manage material logistics with suitable local raw materials and drastically reduce costs.

By reducing lengthy material deliveries, CO₂ is significantly reduced.

What is the UHPC BlackBox Concentrate?

UHPC BlackBox Concentrate System uses a new technology of UHPC binders to which suitable locally produced cement and aggregates can be added as additives.

What are the advantages of the UHPC BlackBox Concentrate?

UHPC BlackBox Concentrate uses suitable, locally produced cement as an additive, which leads to a reduction in material costs and makes material procurement flexible and short term.

It also significantly reduces freight/logistics costs. Our customer can plan more flexibly and has lower storage costs.

For which customers / projects is our UHPC BlackBox Concentrate an advantage?

For all customers/projects that have a regular UHPC concrete material requirement. Such as companies from the offshore, industrial flooring, prefabricated construction, architecture, civil engineering, security, corrosion protection, wear protection, military, road construction, etc.

For architects and planners, the UHPC BlackBox Concentrate offers an extremely wide range of possible combinations through the use of grey cement or white cement in combination with mineral and metallic materials as well as wood, plastic, glass, etc.

How sustainable is the UHPC BlackBox Concentrate?

Concrete made with a UHPC BlackBox Concentrate has a much longer life expectancy than standard concrete. Concrete made with our UHPC BlackBox Concentrate is 100% recyclable. Our UHPC BlackBox Concentrate can use recycled material as aggregate.

With UHPC BlackBox Concentrate we can produce concretes that require much less cement than standard concrete, which significantly reduces the CO₂ content. In every suitability test of local customer cements, we check a minimisation of the cement content.

Which concretes can be produced with the BlackBox Concentrate?

There are three Black Systems, one for UHPC mortar, UHPC castable and UHPC shotcrete.

How can quality be ensured?

We have a team of experienced supervisors and representatives to assist our customers and / or their local contractors with the production, quality assurance and installation of UHPC BlackBox Concentrate.

We offer free training to our customers.

For special installations, such as offshore installations, we can also use complete mobile production and mixing plants. The entire system is installed modularly in containers and is extremely mobile

In which packaging units is UHPC BlackBox Concentrate delivered?

As standard packaging, we deliver UHPC BlackBox Concentrate in 25 kg paper bags or in 1 ton BigBags.

A difference between standard cement and HPC/UHPC binder

We were asked by a customer what the difference is between cement and UHPC binder, because in his opinion there is an extreme price difference between these two products. As far as the price difference is concerned, we have to agree with the customer, we are more expensive than a standard cement, but this does not cause us any headaches.

The difference between standard cement and UHPC binder is as follows:

In order to do anything useful with the single norm cement, you have to add gravel, sand and water to the norm cement. If you mix only cement and water, you will get something very brittle. This something is actually useless.

HPC or UHPC is a special mixture of extremely fine and very special products. These special products are sometimes very expensive and because we produce a high quality HPC or UHPC we only use the best raw materials.

Now the important difference to a standard cement. You can mix any HPC and UHPC binder with water and get a high strength product. In addition, this HPC or UHPC water mix is of extreme fineness. You can achieve extremely fine surface structures and a haptic in the nano range.

 

 

The attached photos show a copy of a long-playing record copy made with an HPC binder. The plate is playable.

Furthermore, individual elements for a large wall design project and another photo shows clock elements that we have copied with an HPC binder. The individual clock elements are now being processed and used in a clockwork by our customer. It will then be a combination of metallic and HPC elements.

 

 

New requirement and application of our high temperature resistant UHPC HT binder.

Following our article on the possible use of our high temperature resistant UHPC HT binder as a
construction material to make blocks that stop molten lava, our ManufactureStudio received an enquiry
from a client who described an object that we were to make from UHPC HT with a cracked surface and then have the cracks filled with precious metal.
Similar to the Japanese method Kintsugi, except that in this case the item does not need to be damaged and repaired.

It is a novel application from our Manufacture Studio. 

For this reason, we have made plates with a similar crack design from UHPC HT for testing purposes. A precious metal smelter friend of ours will be pouring liquid aluminium (melting point 660°C/733°F),
liquid silver (melting point 960°C/1234°F), liquid gold (melting point 1064°C/1337°F) and liquid copper (melting point 1084°C/1257°F) into the cracks in these panels over the next few weeks. Among other things, the test should give us information about the adhesion metal-UHPC. We also want to know how high the degree of filling is, even with very fine cracks.

WPE-DK HT UHPC extreme heat resistant concrete and lava

Lava is molten rock that rises from the earth's interior during a volcanic eruption. The temperature of lava
can vary depending on the type of magma, the depth from which it originates, and other factors. In general, the temperature of lava ranges from 700 to 1,200 degrees Celsius (1,300 to 2,200 degrees Fahrenheit). Some particularly hot lavas can reach temperatures above 1,200 degrees Celsius. The exact temperature depends on the chemical composition of the magma and the geological conditions.

WPE-DK UHPC HT concrete is an extremely strong wear resistant and highly corrosion resistant concrete with a compressive strength of over 200 MPa and a continuous temperature resistance of over 1200°C / 2192°F. The technical properties are achieved without reinforcement. WPE-DK UHPC HT concrete is produced as castable or as mortar mix for about 27 years and mainly used in steel industry worldwide. WPE-DK UHPC HT concrete can be mixed by any local concrete mixing plant.

We believe that WPE-DK HT concrete in pre-cast concrete walls can influence or even stop lava flows in their direction of flow.
To protect infrastructures and people would be worth a try, we would be willing to do so.

UHPC Werkstoff für neuartiges, nachhaltiges Fassadendesign

Seit mehr als 25 Jahren beschäftigen wir uns mit der Entwicklung, Produktion und Anwendung von UHPC - Ultra High Performance Concrete Werkstoffen. Wir bieten mit unseren neuen UHPC Ultra High Performance Concrete Fassadenwerkstoffe der nächsten Generation, neue innovative Materiallösungen für den Fassadenbau an.

UHPC Fassadenwerkstoffe erlauben durch die neuartige und sich immer kontinuierlich weiterentwickelnde Werkstofftechnik neu innovative Antworten auf die zukünftige Fassadenarchitektur zu geben.
In den Standardanwendungen kann UHPC Naturstein und Metall im Fassadendesign ersetzen. UHPC Fassaden sind wesentlich resistenter gegen alle Arten von Umwelteinflüsse als Natursteine und Metalle. Dieser Werkstoff bietet neben vielen technischen Vorteilen auch eine wesentlich höhere Lebensdauer und nahezu keinen Instandhaltungsaufwand. Unsere UHPC Werkstoffe sind vollständig recyclebar und können als Aggregat für neue UHPC Konstruktionen eingesetzt werden.

UHPC Fassadenpaneelen können ab einer Paneelenstärke von 15 mm gefertigt werden.

Geringe Paneelenstärke = geringes Stückgewicht = höhere Stückmenge bei Transport = geringere
Krankapaziäten = einfachere und schnellere Montage = Kostenreduzierung

UHPC Betonwerkstoffe können problemlos in allen Formen, Geometrien und Größen gegossen werden. Dabei sind die Möglichkeiten der Oberflächen-gestaltung nur durch die Gießformqualität begrenzt. UHPC Werkstoffe sind extremfließfähig und selbstkompaktierend. Ca. 70% seiner maximalen Nennfestigkeit erreichen unsere UHPC Werkstoffe nach weniger als 48 Stunden.

Es gibt völlig neue Möglichkeiten der Tragwerks-, Rahmen- und Attikagestaltung durch UHPC. Auch die Entwicklung von Infraleichten UHPC Werkstoffen wird in Kürze abgeschlossen sein. Bei dieser neuen Materialentwicklung wird Festigkeit, Tragfähigkeit mit thermischen Isolierfähigkeit kombiniert.
Auch in der Media-Architektur bietet UHPC neue interessante Lösungen für den Architekten, Designer und Lichtgestalter an. In Verbindung mit Glasfasern zum Beispiel, können vollkommen
Instandhaltungsfreie Licht-/Fassadenelemente von geringer Elementstärke produziert werden.
Schon jetzt können mit faser- und textilbewehrten UHPC Rahmenkonstruktionen für Solarpaneelen,
Glas oder anderen Werkstoffen produziert werden. Ebenso können feine, filigrane und sehr dünne
Fassadenstrukturen mit faser- und textilbewehrten UHPC produziert werden.
UHPC führt auf Grund seiner Materialeigenschaften im Sichtbeton absolut neue Oberflächengestaltungs-möglichkeiten ein.
Ein weiterer Vorteil von UHPC ist das Brandverhalten. UHPC HT (Hochtemperatur) Werkstoffe können Dauertemperaturen von über 1000°C widerstehen.

WPE DK International

Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com

 

هل يمكن استخدام UHPCs الخاصة لحفظ الأسمنت في الخلطات الخرسانية دون فقدان الجودة؟

 نعم ، يمكنك التوفير في استخدام الأسمنت عند استخدام الخرسانة فائقة الأداء (UHPC) مقارنةً بالخرسانة القياسية. إليكم السبب:


1. قوة أعلى:
يحقق UHPC عادةً مقاومة ضغط أعلى بكثير من الخرسانة القياسية. تسمح هذه القوة المتزايدة بتقليل محتوى الأسمنت مع الحفاظ على الأداء المطلوب. باستخدام كمية أقل من الأسمنت ، يمكنك توفير تكاليف المواد وتقليل التأثير البيئي المرتبط بإنتاج الأسمنت.

2. تعزيز التعبئة الجسيمات:
يشتمل UHPC على حجم كبير من الجسيمات الدقيقة ، مثل دخان السيليكا ، مما يحسن من تعبئة الجسيمات داخل الخليط. تقلل هذه التعبئة المُحسَّنة من كمية معجون الأسمنت المطلوب لملء الفراغات ، مما يؤدي إلى استخدام أكثر كفاءة للمواد الأسمنتية.

3. انخفاض نسبة الماء إلى الأسمنت:
يتطلب UHPC عمومًا نسبة ماء إلى أسمنت أقل مقارنة بالخرسانة القياسية. يعزز المحتوى المائي المنخفض قوة الخليط وكثافته مع تقليل الانكماش وتحسين المتانة. من خلال تقليل محتوى الماء ، يمكن تقليل كمية الأسمنت اللازمة ، مما يؤدي إلى توفير التكاليف.

4. المواد الأسمنتية التكميلية (SCMs):

غالبًا ما تشتمل تركيبات UHPC على مواد اسمنتية تكميلية مثل دخان السيليكا. تساهم هذه المواد في المحتوى الأسمنتي الكلي للخليط مع تقليل كمية الأسمنت البورتلاندي المطلوبة. يمكن أن يؤدي استخدام SCM إلى توفير التكاليف مع تحسين خصائص أداء الخرسانة.

5. تخفيض الأسمنت
باستخدام واحد من مواد الربط UHPC الخاصة ، يمكن توفير ما يصل إلى 50٪ من الأسمنت البورتلاندي. أكدت اختباراتنا المعملية والعملية التوفير بوضوح دون تغيير خصائص المعالجة والفنية مقارنة بالأسمنت البورتلاندي.
يمكن معالجة الخرسانة التي تحتوي على نسبة منخفضة من الأسمنت في أي مصنع خلط خرسانة في جميع أنحاء العالم دون أي مشاكل.

6. عناصر أرق:
تتيح خصائص القوة والمتانة الفائقة لـ UHPC تصميم عناصر أرق سابقة الصب مقارنة بالخرسانة القياسية. تتطلب العناصر الرقيقة حجمًا أقل من الخرسانة ، وبالتالي ، كمية أقل من الأسمنت. يؤدي هذا الانخفاض في استخدام المواد إلى توفير التكاليف.

من المهم ملاحظة أنه في حين أن UHPC

لديها إمكانات عالية لتقليل استهلاك الأسمنت في الخرسانة القياسية ، يمكن أن تؤثر العوامل الأخرى مثل تصميم المزيج المحدد ومعايير الأداء المطلوبة ومتطلبات المشروع على توفير الأسمنت الفعلي الذي تم تحقيقه. يعد تحسين تصميم المزيج المناسب ، والمراعاة الدقيقة لخصائص المواد ، والتعاون مع مورد أو مهندس خرسانة ذو دراية أمرًا بالغ الأهمية لتحقيق النتائج المرجوة وزيادة توفير التكاليف إلى أقصى حد.

¿Es posible ahorrar cemento con mezclas especiales de hormigón UHPC?

 Sí, puede ahorrar potencialmente en el uso de cemento cuando utilice hormigón de ultra altas prestaciones (UHPC) en comparación con el hormigón estándar. He aquí por qué:

1. Mayor resistencia
El UHPC normalmente alcanza una resistencia a la compresión significativamente mayor que el hormigón estándar. Esta mayor resistencia permite reducir el contenido de cemento manteniendo el rendimiento deseado. Al utilizar menos cemento, puede ahorrar en costes de material y reducir el impacto medioambiental asociado a la producción de cemento.

2. Empaquetamiento de partículas mejorado
El UHPC incorpora un alto volumen de partículas finas, como el humo de sílice, que mejora el empaquetamiento de partículas dentro de la mezcla. Este empaquetamiento optimizado reduce la cantidad de pasta de cemento necesaria para rellenar los huecos, lo que se traduce en un uso más eficiente de los materiales cementosos.

3. Menor relación agua-cemento
El UHPC generalmente requiere una menor relación agua-cemento en comparación con el hormigón estándar. La reducción del contenido de agua aumenta la resistencia y la densidad de la mezcla al tiempo que minimiza la contracción y mejora la durabilidad. Al disminuir el contenido de agua, se puede reducir la cantidad de cemento necesaria, lo que se traduce en un ahorro de costes.

4. Materiales cementantes suplementarios (SCM)

Las fórmulas de UHPC incorporan a menudo materiales cementantes suplementarios como el humo de sílice. Estos materiales contribuyen al contenido total de cemento de la mezcla y reducen la cantidad de cemento Portland necesaria. El uso de SCMs puede resultar en un ahorro de costes al tiempo que mejora las características de rendimiento del hormigón.

5. Reducción de cemento
Con el uso de uno de nuestros ligantes especiales UHPC, puede ahorrarse hasta un 50% de cemento Portland. Nuestras pruebas prácticas y de laboratorio han confirmado claramente el ahorro sin cambiar las propiedades técnicas y de procesamiento en comparación con el cemento Portland.
El hormigón con una baja proporción de cemento puede ser procesado por cualquier planta mezcladora de hormigón en todo el mundo sin ningún problema.

6. Elementos más finos
Las propiedades superiores de resistencia y durabilidad del UHPC permiten el diseño de elementos prefabricados más delgados en comparación con el hormigón estándar. Los elementos más delgados requieren menos volumen de hormigón y, en consecuencia, menos cemento. Esta reducción en el uso de materiales supone un ahorro de costes.

Es importante señalar que, aunque el UHPC tiene un gran potencial para reducir el consumo de cemento

en hormigones estándar, otros factores como el diseño específico de la mezcla, los criterios de rendimiento deseados y los requisitos del proyecto pueden influir en el ahorro real de cemento que se consiga. La optimización adecuada del diseño de la mezcla, la consideración cuidadosa de las propiedades del material y la colaboración con un proveedor o ingeniero de hormigón experto son cruciales para lograr los resultados deseados y maximizar el ahorro de costes.

특수 UHPC로 콘크리트 믹스에 시멘트를 절약할 수 있나요?

 예, 초고성능 콘크리트(UHPC)를 사용하면 표준 콘크리트에 비해 시멘트 사용량을 잠재적으로 절
약할 수 있습니다. 그 이유는 다음과 같습니다:

1. 더 높은 강도
UHPC는 일반적으로 표준 콘크리트보다 훨씬 높은 압축 강도를 달성합니다. 이렇게 강도가 높아지면 시멘트 함량을 줄이면서도 원하는 성능을 유지할 수 있습니다. 시멘트를 적게 사용함으로써 재료비를 절감하고 시멘트 생산과 관련된 환경 영향을 줄일 수 있습니다.

2. 향상된 입자 포장
UHPC는 실리카 흄과 같은 미세 입자를 다량 함유하여 혼합물 내의 입자 패킹을 개선합니다. 이렇게 최적화된 패킹은 공극을 채우는 데 필요한 시멘트 페이스트의 양을 줄여 시멘트질 재료를 보다 효율적으로 사용할 수 있게 해줍니다.

3. 낮은 물 대 시멘트 비율
UHPC는 일반적으로 표준 콘크리트에 비해 물 대 시멘트 비율이 더 낮아야 합니다. 수분 함량이 감
소하면 혼합물의 강도와 밀도가 향상되는 동시에 수축을 최소화하고 내구성이 향상됩니다. 수분 함량을 줄이면 필요한 시멘트의 양을 줄일 수 있어 비용 절감으로 이어질 수 있습니다.

4. 보충 시멘트질 재료(SCM)
UHPC 배합에는 실리카 흄과 같은 보조 시멘트질 재료가 포함되는 경우가 많습니다. 이러한 재료는 필요한 포틀랜드 시멘트의 양을 줄이면서 혼합물의 전체 시멘트질 함량을 높이는 데 기여합니다. SCM을 사용하면 콘크리트의 성능 특성을 향상시키면서 비용을 절감할 수 있습니다.

5. 시멘트 감소
특수 UHPC 바인더 중 하나를 사용하면 포틀랜드 시멘트를 최대 50%까지 절약할 수 있습니다. 실험실 및 실제 테스트를 통해 포틀랜드 시멘트와 비교하여 가공 및 기술적 특성을 변경하지 않고도 절감 효과를 명확하게 확인했습니다.
시멘트 함량이 낮은 콘크리트는 전 세계 모든 콘크리트 믹싱 플랜트에서 문제없이 처리할 수 있습니다.

6. 더 얇은 요소

UHPC의 우수한 강도와 내구성 특성 덕분에 표준 콘크리트에 비해 더 얇은 프리캐스트 부재를 설계할 수 있습니다. 부재가 얇을수록 콘크리트 부피가 줄어들고 결과적으로 시멘트 사용량도 줄어듭니다. 이러한 재료 사용량 감소는 비용 절감으로 이어집니다.

UHPC는 표준 콘크리트의 시멘트 소비량을 줄일 수 있는 잠재력이 높지만, 특정 배합 설계, 원하는 성능 기준, 프로젝트 요건 등 다른 요인이 실제 시멘트 절감량에 영향을 미칠 수 있다는 점에 유의하는 것이 중요합니다. 적절한 배합 설계 최적화, 재료 특성에 대한 신중한 고려, 지식이 풍부한 콘크리트 공급업체 또는 엔지니어와의 협업은 원하는 결과를 달성하고 비용 절감을 극대화하는 데 매우 중요합니다.

È possibile risparmiare cemento nelle miscele di calcestruzzo con UHPC speciali?

 Sì, è possibile risparmiare sull'uso del cemento quando si utilizza il calcestruzzo ad altissime prestazioni (UHPC) rispetto al calcestruzzo standard. Ecco perché:

1. Maggiore resistenza

L'UHPC raggiunge in genere una resistenza alla compressione significativamente più elevata rispetto al calcestruzzo standard. Questa maggiore resistenza consente di ridurre il contenuto di cemento, pur mantenendo le prestazioni desiderate. Utilizzando meno cemento, è possibile risparmiare sui costi dei materiali e ridurre l'impatto ambientale associato alla produzione di cemento.

2. Miglioramento dell'impacchettamento delle particelle

L'UHPC incorpora un elevato volume di particelle fini, come il fumo di silice, che migliora l'impaccamento delle particelle all'interno della miscela. Questo imballaggio ottimizzato riduce la quantità di pasta di cemento necessaria per riempire i vuoti, con un conseguente uso più efficiente dei materiali cementizi.

3. Rapporto acqua/cemento più basso

L'UHPC richiede generalmente un rapporto acqua/cemento inferiore rispetto al calcestruzzo standard. Il ridotto contenuto d'acqua aumenta la resistenza e la densità della miscela, riducendo al minimo il ritiro e migliorando la durabilità. Diminuendo il contenuto d'acqua, è possibile ridurre la quantità di cemento necessaria, con conseguente risparmio sui costi.

4. Materiali cementizi integrativi (SCM)

Le formulazioni UHPC spesso incorporano materiali cementizi supplementari, come il fumo di silice. Questi materiali contribuiscono al contenuto cementizio complessivo della miscela, riducendo al contempo la quantità di cemento Portland necessaria. L'uso di SCM può consentire di risparmiare sui costi, migliorando al contempo le caratteristiche prestazionali del calcestruzzo.

5. Riduzione del cemento

Con l'uso di uno dei nostri speciali leganti UHPC, è possibile risparmiare fino al 50% di cemento Portland.
I nostri test di laboratorio e pratici hanno confermato chiaramente il risparmio senza modificare le proprietà tecniche e di lavorazione rispetto al cemento Portland.

Il calcestruzzo con una bassa percentuale di cemento può essere lavorato senza problemi in qualsiasi impianto di betonaggio del mondo.

6. Elementi più sottili

Le superiori proprietà di resistenza e durabilità dell'UHPC consentono di progettare elementi prefabbricati più sottili rispetto al calcestruzzo standard. Gli elementi più sottili richiedono meno volume di calcestruzzo e, di conseguenza, meno cemento. Questa riduzione nell'uso dei materiali porta a un risparmio sui costi.

È importante notare che, sebbene l'UHPC abbia un elevato potenziale di riduzione del consumo di cemento nei calcestruzzi standard, altri fattori come la specifica progettazione della miscela, i criteri di prestazione desiderati e i requisiti del progetto possono influenzare l'effettivo risparmio di cemento ottenuto. Un'adeguata ottimizzazione del mix design, un'attenta considerazione delle proprietà del materiale e la collaborazione con un fornitore di calcestruzzo o un ingegnere esperto sono fondamentali per ottenere i risultati desiderati e massimizzare i risparmi.