Concrete accelerator

Concrete accelerator

Amorphous calcium aluminate is for Shotcrete Accelerator
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Concrete accelerator
Introduction

Concrete Mix Accelerator Amorphous C12A7 Rapid Setting For Shotcrete Accelerator

Amorphous calcium aluminate is the basic raw material of a new Accelerator, its principal constituent is the non-crystalline calcium aluminate. Appearance of light gray-green powder.

    higher reactivity than the crystalline product,

    used in conjunction with silicate cement, can achieve a higher degree of responsiveness and efficiency. Non-crystalline calcium aluminate reacts unexpectedly fast with plaster and water to produce ettringite;

   adds its appropriate to ordinary silicate cement, the initial setting in less than a minute to complete. Addition of ettringite structural stability, good strength. While ettringite volume expansion, formation of prestressed concrete and shrinkage resistance.

 non-crystalline calcium aluminate:

 

Specification

Chemical composition(%)

CaO

Al2O3

SiO2

Fe2O3

TiO2

MgO

High-calcium products

50-55%

38-44%

≤5.0

≤2.0

≤2.0

≤2.0

High-alumina products

≤48

≥42

≤5.0

≤2.0

≤2.0

≤2.0

Non-crystallization rate

  Over 95%

Specific surface area

 5000-6000  m2/g

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