POLYCARBOXYLIC ACID COPOLYMER (CONCRETE ADMIXTURE)

POLYCARBOXYLIC ACID COPOLYMER

CONCRETE ADMIXTURE

PROPERTY

Chemical admixtures are water soluble ingredients (other than cement, water, and aggregate) added to concrete in small quantities before or during mixing to obtain some desired performance in the fresh and hardened state. They should improve workability of the fresh mixture and strength or durability of the hardened concrete. Chemical admixtures can be classified into five major categories depending on the effectiveness; superplasticizers, air-entraining, water-reducers, retarders, and accelerators. There are also other admixtures that have functions such as corrosion inhibition, shrinkage reduction, alkali-silica reaction inhibition, workability enhancement, damp proofing, and coloring. Mineral admixtures are hydraulic or pozzolanic supplementary fine powder materials to increase additional strength and durability of hardened concrete.

Superplasticizers

Sulphonated naphthalene formaldehyde polymer
Sulphonated melamine formaldehyde polymer
Lignosulfonates, modified
Polycarboxylates

Mineral admixtures

Blast-furnace slag
Fly ash
Condensed silica fume

Polycarboxylic copolymer, a water-soluble polymers made of olefin monomer, is a concrete admixtures to reduce the cost of construction and to improve the quality of concrete. They have a water reducing effect with non-setting retardation and low entraining in manufacturing of high strength concrete. They are used to increase slump, to reduce water content and to lower cement content.

WR GRADE

PROPERTY	UNIT	VALUE
APPEARANCE		Brownish oily liquid
ACTIVE CONTENT	%	40±1
WATER	%	Balance
pH		7 ± 1
Viscocity	cps	250 ± 50
SPECIFIC GRAVITY		1.13 ± 0.02 at 20 C

SR GRADE

PROPERTY	UNIT	VALUE
APPEARANCE		Brownish oily liquid
ACTIVE CONTENT	%	40±1
WATER	%	Balance
pH		7 ± 1
Viscocity	cps	200 ± 50
SPECIFIC GRAVITY		1.12 ± 0.02 at 20 C

SUPPLIERS
Korea	LG Chem Ltd www.lgchem.com