1

(Admixtures)

5210110468 3

(Concrete Admixture) --- - - - - - - 4 1.(Air-Entraining Agent) 2.(Chemical Admixture)

3.(Mineral Admixture) 4. 3 -(Waterproofing)-(Pumping Aids)-(Grouting Material)-(Alkali Aggregate Reducing)-(Corrosion Inhibitor)--(Gas Formers)

90% 80% 80% 60% 10 1. . 733-2530 - - - -PH2.113. 4.

(Organic Surfactant) 0.25-1 .

1. - - - 300-600 - 2.- - 3. -

ASTM C494 7 1. Type A Water Reducing Admixtures

172.Type B Retarding Admixtures Hydration - - -

3.Type C Accelerating Admixtures Hydration - - - Hydration

4.Type D Water-Reducing and Retarding Admixtures Hydration LSN HCA 5.Type E Water Reducing and Accelerating Admixtures Hydration

6.Type F High Range Water Reducing Admixtures (Superplasticizer) ~ 15% - 30% ~ 20% - 40% (30 - 60 ) 7.Type G High Range Water Reducing and Retarding Admixtures (Superplasticizer) Type F Hydration naphthalene sulphonate

(plasticizer) 3 1. Lignosulphonate 2. Hydroxycarboxylic Acid 3.Polymer - -

(Retarders)

4 1.2.3.Hydroxycaboxylic Acid 4.Lignosulphoic Acid

(Accelerators)

Calcium ChlorideCalcium FormateCalcium Nitrate 2 (Mineral admixture) 1. 2. Pozzolana Pozzolana Calcium Silicate-Hydrate Pozzolana 28

- -

- Calcium Sulpho-Aluminate - - Polymer Latex - - Stabilize Bonding