RAKNOR Ready Mix Concrete is a state-of-the-art production facility.
RAKNOR Ready Mix Concrete can supply a full range of concrete mixes to customer requirements. Our Ready Mix Concrete division is also permanently developing innovative solutions to improve the sustainability of structures made with concrete. Furthermore, we are continuously working with our customers to design more sustainable solutions for a wide range of applications.
The Core activities of the RAKNOR Ready Mix division are:
6. Research and Development
1. Normal Strength Concrete
The concrete that is obtained by mixing the basic ingredients cement, water and aggregate together produce a normal strength concrete. The strength of these types of concrete can be defined from 10 MPa to 40MPa. Normal strength concrete has an initial setting time of approximately 90 minutes depending on the cement properties and the weather conditions of the construction site.
2. Water Tight Concrete
The term 'watertight concrete' covers a range of specialized ready-mixed concretes which are designed to be impermeable to water to protect a structure from water ingress or to retain water within a structure.
Watertight concrete uses a high-performance integral waterproofing system for wet-cast concrete, which employs super plasticizing and waterproofing admixtures. Simply explained, the admixtures assist in decreasing the number of capillaries within the concrete – microscopic holes that allow the passage of water and water vapor – while still providing workability to enable placement. The use of watertight concrete reduces water permeability, water penetration and absorption, as well as reducing air permeability.
Concrete that isn’t watertight will permit some water to penetrate. If the cover is inadequate, once that water reaches the steel reinforcement within the concrete, the rebar will rust and expand, forming hollow voids that will weaken the strength of that area. These voids will then fill with water, feeding a cycle of deterioration and the effects of which may not become clear until major remedial work is required. This scenario can be avoided by ensuring adequate cover to the reinforcement, specifying the right waterproofing solution from the outset, and ensuring that the properly specified concrete is correctly mixed, placed, compacted and cured.
Application: For various underground concrete structures (basements, tunnels), which are exposed to the groundwater or water containing structures.
3. High Durability Concrete
Durability is the ability to last a long time without any significant deterioration. A durable material helps the environment by conserving resources and reducing wastage by avoiding the impacts associated with repair and replacement because it lasts much longer.
High durability concrete resists weathering action, chemical attack and abrasion whilst retaining the required engineering properties. Different concretes require different degrees of durability depending on the exposure environment and the properties desired. Concrete ingredients, their proportioning and interactions between them, placing and curing practices, along with the service environment all determine the ultimate durability and life of the concrete.
4. Precast Concrete
Various structural elements can be made by casting in the factory as per the specifications and bought to the site at the time of assembly. Such concrete units are called Precast Concrete.
Typical examples of precast concrete units are concrete blocks, the staircase units, precast walls and poles, concrete lintels and many other elements. Precast provides tight factory-style production quality control combined with the ability to reduce the amount of activities on the job site, leading to a more efficient and safer construction project.
Applications: Repetitive high-tolerance units – For example wall units, quay wall blocks, road barriers, manholes and pipes.
5. Air Entrained Concrete
These are concrete types into which air is intentionally entrained for an amount of 3 to 6% of the concrete. The air entrainment in the concrete is achieved by the addition of air-entraining agents. Some examples of air-entraining agents are resins, alcohols, and fatty acids.
Air-entrained concrete contains billions of microscopic air cells per cubic meter of concrete. These air pockets relieve internal pressure on the concrete by providing tiny chambers for the interstitial water within the concrete to expand into when it freezes.
Applications: Anywhere prone to freezing or freeze/thaw activity – industrial refrigeration floors, ice plants.
6. High-Strength Concrete
Concretes that have strength greater than 40MPa can be termed as high strength concrete. This increase in strength is achieved by decreasing the water-cement ratio to around 0.35 and optimizing the packing.
The incorporation of silica fume or micro silica is used to reduce pore space and increase matrix and paste density.
Applications: Cores of buildings, particularly high rise.
7. High-Performance Concrete
These concretes conforms to a particular standard but are not purely limited to strength. It has to be noted that all the high strength concrete can be a high-performance type. But not all high-performance concrete (HPC) are high strength concrete.
Requirements that determine high-performance concrete are listed below:
o Strength gain – Early age strength development (Early stripping of framework or Post Tensioned floor slabs)
o Delayed or very slow strength development (secant piles)
o Accelerated strength and set (Shotcrete)
o Easy placement of the concrete (congested reinforcement steel)
o Permeability and density factors – High density for radiation shielding or ballasting.
o Heat of hydration – Low heat for large pours
o Long life and durability
o Toughness and life term mechanical properties
o Environmental concerns
8. Self – Compacting Concrete
The concrete mix when placed will compact under its own weight. No external vibration is required. This mix has high workability. The slump flow value will be between 650 and 750 mm.
This concrete due to its higher workability flow is also a flowing concrete. The areas where there is thick reinforcement, self – compacting concrete works best.
Applications: Dense reinforcement areas, areas where traditional vibration is not possible, high-quality surface finish.
9. Roller Compacted Concrete
This is concrete that is placed and compacted with the help of earthmoving equipment like heavy rollers. This concrete is mainly employed in excavation and instatement applications.
These concretes typically have a lower cement content and are laid over the required area as necessary in layers and rolled and compacted. After compaction, these concretes provide a dense and strong monolithic block. However, they are not resistant to exposure or wear and so a capping layer of a suitable grade of concrete or other material must be used.
Application: dams, sub-bases to high load-bearing pavements, work yards.
10. Fiber Reinforced Concrete
Fiber-reinforced concrete is a designed concrete that contains fibers, which can be steel or plastic or combination of, to increase structural integrity and residual load-bearing capacity. It contains short discrete fibers that are uniformly distributed and randomly oriented which can be a replacement to conventional reinforcement or in addition.
Applications: Floors both composite or warehouse, tunnel linings, areas needing to resist spall.
11. Foam Concrete
Foam concrete is a type of lightweight concrete that is manufactured from cement, sand or fly ash, water and foam. Foam concrete can be defined as a cementitious material that consists of minimum 20 percent of foam that is mechanically entrained into the plastic mortar. Various densities and strengths are available.
Applications: Infilling of redundant ducts under roads, insulated concrete products
Quality Control and Technical Support section
We at RAKNOR believe in service and support during and after-sales. Our Qualified technical team is always available for both routine and special support site visits.
Our technical team, QAQC procedures together with our Laboratory are permanently engaged in the testing of both raw materials and finished products to ensure the highest quality.
1. SAQR PORT EXPANSION –Phase 1 and 2 – Ras Al Khaimah
RAKNOR Ready Mix Concrete supplied concrete for the construction of the precast blocks of different sizes to construct 720 m long Quay wall.
Also, RAKNOR Ready-mix supplied concrete to cast the Capping beam along with concrete for the rest of the project specified works.
2. ARCHIRODON PROJECT:
RAKNOR Ready mix concrete supplied the C45 grade concrete for the production of coastal defence Acropods.
3. STEVIN ROCK PROJECT
RAKNOR Ready mix concrete supplied structural grade concrete to cast foundations and all other structures for the erection of Crusher 22 located at Khor Khwair Q2 Quarry.
4. RAKNOR VAP PROJECT
RAKNOR ready mix supplied all the different grades of concrete for the complete project erection of RAKNOR VAP Project, which is a Production facility of value-added Products for modern landscaping located at Khor Khwair. This included fibre reinforced, low heat and self-compacting concrete products.
5. AREX PROJECT
Precast wall panels using high durability C60 and high strength concretes. Also, RAKnor Readymix is supplying the same concrete to the site for storage buildings.