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Ready-Mixed Concrete

Ready-Mixed Concrete

Types of Ready-Mixed Concrete

Concrete Type Coarse Aggregate
Maximum Size(mm)		 Slump or Slump Flow(mm) Nominal Strength MPa ( = N/㎡ )
18 21 24 27 30 35 40 45 50 55 60 Bending 4.0 Tensile 4.5
Normal Concrete 20, 25 80, 120, 150, 180 O O O O O O - - - - - - -
210 - O O O O O - - - - - - -
500, 600 (*) - - - O O O - - - - - - -
40 50, 80, 120, 150 O O O O O O - - - - - - -
Lightweight Concrete 15, 20 80, 120, 150, 180, 210 O O O O O O O - - - - - -
Paved Concrete 20, 25, 40 25, 65 - - - - - - - - - - - O O
High-Strength Concrete 15, 20, 25 120, 150 ,180, 210 - - - - - - O O O - - - -
500, 600, 700 (*) - - - - - - O O O O O - -

Specifications by Purpose

Name Specifications Scale
Foundation 25-21-120 1-15 stories building
25-24-120 25 stories or higher building
Wall and Slab 25-21-120 5 stories or lower
25-21-150 1-10 stories
25-24-150 5 stories or higher
25-27-150 1-5 stories
25-40-150 30 stories or higher
Purification Tank 25-18-80 Installation
Road Paving 25-21-80 Alley use
25-21-120 Alley use

Product Consumption

Classification 1 Square Meter Ready-Mixed Concrete Consumption Range 1 Square Meter Ready-Mixed Concrete Average Consumption Average Consumption Calculation Method
Multi-family Residence 0.40 ~ 0.60 0.65 2.14 Square Meter * 2.14 ㎥
Apartment 0.40 ~ 0.60 0.50 1.65 Square Meter * 1.65 ㎥
Office (Steel Frame) 0.56 ~ 0.62 0.59 1.94 Square Meter * 1.94 ㎥
Office (R/C) 0.45 ~ 0.55 0.62 2.04 Square Meter * 2.04 ㎥
School 0.35 ~ 0.65 0.50 1.65 Square Meter * 1.65 ㎥
Factory 0.52 ~ 0.65 0.50 1.65 Square Meter * 1.65 ㎥
Theater 0.52 ~ 0.90 0.71 2.34 Square Meter * 2.34 ㎥
Bank 0.56 ~ 0.80 0.65 2.24 Square Meter * 2.24 ㎥

Ready-Mixed Concrete (KS F 4009) - Composition of Materials

Classification Calculation Method
Water

Water is classified into potable water, non-potable water, and recycled water.

The solid content ratio of recycled water must not exceed 3%.
Portland Cement

It is a powder of minerals that react with water to harden.

1st type: Normal, 2nd type: Medium heat, 3rd type: Low heat, 4th type: Low sulfate, 5th type: Low sulfate
Fine Aggregate and
Coarse Aggregate

The aggregate must be clean, strong, durable, have the appropriate size, and not contain fine particles, coarse particles, organic impurities, chloride, etc.

Clay lumps: Fine aggregate (1.0% or less), Coarse aggregate (0.25% or less)

0.08㎜ sieve passage: Fine aggregate (3.0% or less), Crushed sand (7.0% or less), Coarse aggregate (1.0% or less)
Additive

A cement substitute used to improve concrete performance.

Expander, Fly Ash, Ground Slag Powder, Silica Fume, Anhydrite, etc.

※Additive (Additive, Additive) must be approved by the purchaser.
Additive

A cement additive that improves the properties of concrete by surface active action.

AE Additive, Superplasticizer (Standard, Retarded, Accelerated), High-Performance AE Additive (Standard, Retarded)

High-Performance AE Additive (Standard, Retarded)

Ready-Mixed Concrete (KS F 4009) - Quality

1. Strength, Slump, Air Content :
The outlet must satisfy the following conditions.
Strength

If specified by the purchaser, the specified number of days, if not specified, is 28 days.

The result of one test must be 85% or more of the specified nominal strength value by the purchaser.

The average of three test results must be equal to or greater than the specified nominal strength value by the purchaser.

Slump Allowable Tolerance
of Slump
25 ±10
50 and 65 ±15
80 or higher ±25
Slump Flow Allowable Tolerance
of Slump
500 ±75
600 ±100
700 ±100
Type of Concrete Air Content Allowable Tolerance
of Air Content
Normal Concrete 4.5 ±15
Lightweight Concrete 5.5
Paving Concrete 4.5
High-Strength
Concrete		 3.5
2. Chloride Content :
The amount of chloride ions (Cl⁻) at the discharge point shall be 0.30 kg/m³ or less.
However, with the purchaser's approval, it may be increased to 0.60 kg/m³ or less.
3. Item :
Slump Flow 700 is applicable only when the maximum size of the coarse aggregate is 15mm.

Ready-Mixed Concrete - Ordering Notes (Mix Design)

  • Maximum Size of Coarse Aggregate

    Maximum Size of
    Coarse Aggregate (mm)

  • Nominal Strength

    Nominal Strength MPa (N/㎟)
    Compressive Strength of
    Cylinder after 28 days

  • Combination
    of Slump

    Slump(㎜) Unstiffened Concrete
    Mixer (the higher the value,
    the easier the work)

Mortar - Characteristics

• Crack Reduction Performance : Manufactured with accurate design ratios

• Superior Quality : Factory production for reliable quality management

• Excellent Work Performance : Excellent pumping performance, even surface performance

• Excellent Finishing Performance : Excellent surface finish, even surface performance

• Easy Construction Management : No need for site silo installation

• Economical Cost : Material cost reduction, construction management cost reduction

Fiber Reinforced Concrete

  • Plain
    Concrete

  • Wire-Mesh
    Reinforced Concrete

  • Fiber Reinforced
    Concrete

• Dispersing fibers into the plain concrete

• Reinforced by three-dimensional reinforcement to prevent cracks

• Use of Ultra Fiber-500

• Possible to reduce cracks by replacing Wire-Mesh

Fiber Reinforced Concrete - Characteristics

  • Excellent Finishing Performance :

    Good dispersion of natural wood fiber.
    No surface exposure and Fiber-Balling phenomenon.

  • Excellent Crack Reduction Performance :

    Cost reduction by replacing Wire-Mesh,
    Excellent construction performance.

  • Economical Cost and Excellent Construction Performance :

    Three-dimensional reinforcement of shrinkage tension stress,
    Control of hydration reaction performance by wood fiber repair.

  • Wide Application Range :

    Various plain concrete
    ( Basement parking floor finish, waterproof layer collapse, etc.)
    Decoration concrete, colored concrete, etc.

Fiber Reinforced Concrete - Characteristics

Classification Wire-Mesh Reinforced Concrete Fiber Reinforced Concrete
Specification Wire-Mesh ( #8-@ 150 *150 ) Cellulose Fiber 0.30㎏/㎥
Reinforcement Type Planar reinforcement to control cracks ineffectively Three-dimensional reinforcement to reduce crack effect reliably
Material Properties Metal Hydrophilic wood fiber
Chemical Properties Resistant to corrosion Resistant to corrosion
Water Resistance Poor – Corrosion phenomenon Good
Advantages and Disadvantages

Difficult to transport, install on site

Storage space, management of corrosion is needed

Difficult to maintain uniform cover thickness

Easy to tear off the waterproof layer when installing

Ineffective crack suppression effect

Excellent construction performance (Ready-Mixed Concrete Factory Mix)

Cost reduction of construction period, construction cost

Excellent finishing performance

Excellent crack reduction performance

Exposure Concrete

Exposure Concrete (Exposure Concrete)

Exposure Concrete is a construction that involves both the construction of the frame and the finishing work,
The workability of the concrete must be good, and the separation of the aggregate, the cold joint must not be generated,
And it is necessary to maintain the natural beautiful color of the concrete, or in the case of colored concrete, it is necessary to maintain the colored color.

Fiber Reinforced Concrete - Characteristics

  • Shortening of Construction Period by Concurrent Construction :

    No need for the finishing process after the concrete is poured.

  • Various Color Selection :

    Possible to add color to the concrete,
    and to produce a fancy color.

  • Skip the Coloring Work :

    The natural color of the concrete is maintained,
    The surface is smooth and the same as the coated one,
    So the coloring is not needed.

  • Wide Application Range :

    Possible to apply to various parts.

High-Strength Concrete

High-Strength Concrete is a concrete with a compressive strength of 40MPa or higher.
It is used in many parts of the structure, such as columns, and can be used in bridges, PC Beams, etc.
It is possible to reduce the construction cost and the maintenance cost through the high durability, and it is economical.

  • 01

    Resistant to freeze-thaw, salt ion penetration, neutralization.

  • 02

    When used as a compression member in a column.

  • 03

    When used as a prestressed concrete girder.

  • 04

    Resistant to drying shrinkage, creep, etc.

  • 05

    Due to the reduction of the steel amount,
    Cost reduction,
    Due to the reduction of the column section,
    Possible to expand the living space.

  • 06

    PC Beam height, number of
    Reduction and elongation due to
    Economical construction possible
    Due to the reduction of the pier number,
    Possible to reduce the pier number.

Low Heat Concrete

Low Heat Concrete is a concrete that reduces the hydration heat of the cement itself,
Or by the mixing technique of the mineral admixture, it is a concrete that minimizes the temperature cracks and stress due to the hydration heat of the cement,
And is mainly applied to large structures such as underground structures, dams, offshore and harbor structures.

User Requested Mix

Possible to ship the product according to the mix ratio requested by the construction site.
After the acceptance of the site mix design table, apply the design to ship the product quickly.

  • Acceptance of
    Mix Design Table

  • Apply the Design

  • Ship the Product