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Ready-Mixed Concrete

Ready-Mixed Concrete

The ready-mixed concrete is mixed at a facility equipped with specialized concrete production systems, using a mix of cement, sand, pebbles, water, and admixture, following the manufacturing method and quality inspection specified in KS F4009. Once completed, it’s shipped on a ready-mixed concrete truck and delivered to the site.

    Advantages of Ready-Mixed Concrete

  • Eliminates the need for a place to mix concrete on site
  • Ensures accuracy in construction
  • Ensures consistent and high quality
  • Reduce construction costs
Product Archive

Types of Ready-Mixed Concrete and Testing Criteria

■ Types of Ready-Mixed Concrete

PHC Pile Specification Table
Types of Concrete Max. dimensions of
coarse aggregate (mm)
Slump or
Slump flow (mm)
Nominal strength: MPa(=N/㎟)(1)
18 21 24 27 30 35 40 45 50 55 60 Wheel4.0(2) Wheel4.5(2)
Regular Concrete 20, 25 80, 120, 150, 180 0 0 0 0 0 0 - - - - - - -
210 - 0 0 0 0 0 - - - - - - -
500*, 600* - - - 0 0 0 - - - - - - -
40 60050, 60, 120, 150 0 0 0 0 0 0 - - - - - - -
Lightweight Concrete 15, 20 80, 120, 150, 180, 210 0 0 0 0 0 0 0 - - - - - -
Pavement Concrete 20, 25, 40 25, 65 - - - - - - - - - - - 0 0
High-Performance Concrete 15, 25, 25 120, 150, 180, 210 - - - - - - 0 0 0 - - - -
500*, 600*, 700* - - - - - - 0 0 0 0 0 - -

※ * (*) represents slump flow.

Quality Requirements

■ Slump and Slump Flow

Slump and Slump Flow
Slump Slump flower
Slump Slump tolerance (mm) Slump flower Slump flow tolerance (mm)
25 ±10 500 ±75
50 and 65 ±15 600 ±100
80 and greater ±25 700 ±100

■ Air Content

Air Content
Types of Concrete Air content Tolerance for air (mm)
Regular Concrete 4.5 ±15
Lightweight Concrete 5.5
Pavement Concrete 4.5
High-Performance Concrete 3.5

■ Chloride Content

Air Content
The chloride content in ready-mixed concrete should be 0.30kg/㎡ or below in its ionic state (CL-) at the point of release. However, it can be used up to 0.60kg/㎡ or below with the buyer's approval.

■ Transportation and Delivery Instructions

공기량
A truck mixer or truck agitator should be used to transport concrete. A dump truck can be used when concrete with a slump of 25mm or below is transported.

Ready-mixed concrete has the broadest range of applications in the construction industry: from large-scale civil engineering (dams, bridges) to high-rises and small-scale works, such as faucets backyard.
It is not an understatement to say South Korea's economic development was led by the concrete industry (ready-mixed concrete and products made using it).
It is the very foundation and the most critical component used to build a structure that suits a customer's needs after going through a design process and delivery to the construction site.