Standard Concrete

KCRC’s range of standard concretes are designed for residential applications, low-rise buildings, paving, driveways and other less demanding applications where the method of placement is via conventional means such as chute, pump or kibble. The quality and quantity required vary according to the project.
The “ASTM C 94 – Standard Specification for Ready Mixed Concrete” defines the quality formats:

Performance — wherein the client specifies the aggregate size, slump, air content, and strength. In this case, KCRC is responsible for the design of the mixture.

Prescription — wherein the client specifies the aggregate size, slump, air content, cement content or weight of cement per unit volume of concrete. Here, the purchaser / client accepts responsibility for concrete strength and performance.

Colored Concrete

When comparing the overall appeal between natural gray concrete and color-conditioned concrete, the choice is clear. Today’s projects, whether residential, commercial or public works, demand more aesthetic appeal as well as improved function. Color-conditioned concrete provides permanent, non-fading, uniform color in a durable and long-lasting surface.  These benefits, combined with concrete’s natural appeal, can also add value to your property.

Self Consolidating Concrete

Self Consolidating Concrete (SCC) is concrete that is measured by flow, not by slump. SCC reduces placement costs and improves finished formed surfaces without the need for external energy such as vibration, or movement of the discharge stream. This is done by maximizing the gradation of aggregates and by using specifically designed chemical admixtures to maintain mix cohesiveness and fluidity, without segregation. SCC meets the demands of the most difficult concrete placements. Examples include congested steel reinforcement, reveals, block-outs, plumbing, and other architectural elements. SCC also reduces the appearance of “bug holes” when compared to conventional concrete systems.

High Strength Concrete

The use of high strength concrete is becoming routine practice for high rise buildings, especially for columns, shear walls and transfer beams. The criteria governing the mix design of concrete are obviously implied by the required performance of hardened concrete and fresh concrete. At KCRC, we know how to meet that requirement and surpass it. KCRC has concrete mix designs formulated to meet strengths of up to K1000. What’s more, we know what needs to be done at every stage. The success of high strength concrete requires close collaboration between the contractor and the ready-mix supplier.

Rapid Setting Concrete

Is capable of attaining its specified strength at an earlier age than normal concrete through the use of high-early strength cements and/or chemical admixtures. KCRC has formulated concrete mixes to meet K250 from 4 to 24 hours, depending on your particular project needs. This can add up to substantial cost savings when compared to conventional concrete mixtures for opening up concrete pavements to traffic earlier and minimizing lane closures. Rapid setting concrete can provide other cost benefits by “fast-tracking” the backfilling, post-tensioning and shoring removal operations on your project.

Low Shrinkage Concrete

Shrinkage occurs in all concrete and is relative to the amount of water loss in the hydration process and quality of cement and raw materials. Shrinkage can be reduced by using the maximum amount of course aggregate permitted in a mix and keeping the concrete moist (curing) as long as possible during setting. As the binder in concrete hydrates (or reacts with water), the material undergoes a volume change with time.  This volume instability is commonly measured as concrete shrinkage. The materials selected must be controlled – by materials selection, site procedures and design, the level of shrinkage – in concrete structural elements.

Marine Concrete

Marine Concretes are a range of High Performance Concretes designed to reduce corrosion of steel reinforcement in marine (high chloride) conditions. Marine concretes have a design life of approximately 50 years with a 50mm cover for reinforcement, meeting or exceeding the requirements of AS 3600 exposure classification C. Concretes typically achieve 60MPa compressive strengths (28 days) with reduced creep and shrinkage with final slumps in the order of 120 + 30mm. Marine concrete designs are continuously optimized to provide the best concrete using locally available materials.

Sulphate Resistant Concrete

Sulphate Resistant cement provides additional protection where the concrete is subject to an aggressive environment such as salt water or chemically active soils. Environmental conditions such as those met in sulphate-rich soils and some natural waters require concrete to be designed to resist deterioration due to sulphate attack. High sulphate concentrations in water are normally naturally occurring or a result of industrial effluents.  High sulphate concentrations are also found in sea water.  With proper consideration at the design stage, concrete systems having sulphate resisting characteristics are available for use.

Fiber Reinforced Concrete

Fiber mesh concrete is the one-step micro-reinforcement system, Place your secondary reinforcement while you place your concrete – “automatically” Fiber mesh fibers are engineered for concrete in compliance with building codes to provide top-to bottom, side-to-side uniform reinforcement as a cost-effective and superior alternate system of secondary reinforcement.

Ready Mix Concrete in bags

Standard concrete in bags depending on the customers request of strength and mix design.

Precast Concrete

• Custom Precast
• Columns
• Walls
• Manholes
• Sand Bunkers
• D.F.P.
• Texas Barriers
• Jersey Barriers
• Alaskan Barriers
• T-Walls

Advanced Concrete Technologies

• This makes the concrete more water tight (impermeable) thus preventing initiation of corrosion in steel embedded with concrete.
• Compressive Strength and rate of gain of strength remains unchanged and concrete becomes more economical.
• Very good for concreting of foundations more than 1.2m depth due to reduced heat of hydration.

• This makes the concrete more resistant to sulphates and chlorides.
• Useful for concrete in coastal areas.
• Not as economical as using fly ash (PFA) but equally durable.

• To back fill trenches and narrow gaps around foundation.
• Costlier than soil but needs no compaction and it is self leveling.
• Can be excavated later.