Introduction: Based on organic retarding composites and β-naphthalene sulfonate formaldehyde condensate, Point-400 is a compound with performance of high water reduction, high slump retaining, reducing hydration heat peak, delaying peak occurring time, controlling temperature cracking and enhancing concrete compressive strength, and able to significantly improve the workability of concrete mixture.

Features:

High dispersion: Based on the result measured according to national standard GB 8076-2008 “Concrete Admixture”, with dosage of 1.8%, it can have a water reduction rate of 22% and excellent filling-ability if applied in preparation of high strength and ultrahigh strength concrete. The fluidity of cement paste at different dosage is as shown in Fig. 1.

High slump retaining: Fluid concrete prepared with Point-400 set retarding type has slump loss of less than 20% within one hour. It is particularly suitable for commercial concrete construction required high slump retaining.

Excellent workability: It can effectively enhance the flowability of concrete and reduce bleeding and separation to improve concrete compatibility, and thus make concrete convenient for pumping and easy to compact.

Excellent reinforcing: At the same dosage of unit cementitious material, with water dosage of 1.5%, the 3d and 28d compressive strength of the concrete with Point-400 superplasticizer (set retarding type) is generally 50~70% and 20~40% respectively higher than those of reference concrete of corresponding period.

Low early hydration heat: Concrete prepared Point-400 set retarding type has low early hydration heat. It can effectively prevent and control temperature cracking in large-volume concrete if used with mixtures such as fly ash and grinded slag.

Adjustable set time: Point-400 set retarding type can effectively adjust the set time of fresh concrete depend of different construction requirements.

Excellent durability: Point-400 set retarding type can effectively improve the pore structure of concrete and significantly enhance the durability indexes such as anti-permeability, anti-carbonation, wetting-drying cycle resistance, and freezing and thawing resistance.

High adaptability: The product is well adapted to various types of cement, expanding agent fly ash and grinded slag.

Safety properties: Non-toxic, non-irritant, non-radioactive, nonflammable, non-explosive, non-dangerous, and no corrosive to steel bar.