NF Retarding high-efficient water reducing admixture

1.water reducing, high early strength, and high permeability enhancement 2..slow down the speed of hardening cement .

         this product is compounded by high-efficient water reducing admixture and various retarders. It not only keeps the high-efficient water reducing admixture’s early strength and high strength sex, but also plays the role of slowing down the speed of hardening cement.

This product meets GB8076-1997 quality standard.

Homogeneity index

Test items	index
Appearance	Light brown powder
Solid content  %	>90
Chloride ion content %	<1
Fluidity of cement paste mm	>180  mm
Fineness(0.315 mm screen residue)	<15

Main performance:

the dosage is 0.6%~1% of the cement content ,water reducing ratio is up to 14%~22%No effect on early strength.Quan condense time can be extended by2-4 hours. Extending or shorting is available for special requirements.Heat time can be delayed; peak heat should be reduced in case of crack.

Quan performance index

Test item	First-rate  product		Qualified product
Water reducing ratio( %)	>12		>10
Breeding rate (%)	<100		<100
Air content (%)	<4.5		<4.5
Difference of gel time	start	>+90	----
	end	-----
Compressive strenght   ratio%	1day	-----	-----
	3 days	.>125	>120
	7 days	>125	>115
	28 days	>120	>110
Shrinkage ratio %		<135
Corrosion for rebar		no	no

NF Retarding high-efficient water reducing admixture