PNS-A superplasticizer

Concrete admixture,superplasticizer,naphthalene sulphonate formaldehyde

UNF INTRODUCTION

I.           APPLICATION

1.             Used for and widely for self-cured, vapor-cured concrete and its formulations. At the early stage of application, extremely prominent effects are shown. As the result, the modulus and site utilization can be drastically, the procedure of vapor cure is omitted in peak-heat summer days. Statistically 40-60 metric tons of coal will be preserved when a metric ton of the material is consumed.

2.             Suitable for preparation of early-strength, high-strength, high-anti-filtration and self-sealing& pumpable concrete.

3.             Widely used in pre-cast & ready-mixed concrete, armored concrete and pre-stressed reinforced concrete in key construction projects such as dam and port construction, road building & town planning projects and dwelling erections etc.

4.             Compatible with Portland cement, normal Portland cement, Portland slag cement, fly-ash cement and Portland pozzolanic cement etc. 

II.         PROPERTIES, FEATURES & CHARACTERISTICS1.Appearance: Light brown powder& dark brown liquid. Non-poisonous, odorless, non-flammable and non-corrosive to steel bars.2. Remarkable Plasticity: As a condition of blending where amount of cement and collapsibility are fixed aforehand, mixing water can be decreased by 18-28% when it is admixed with reinforced concrete at 0.5-1.0%. Statistically, compression strength on the lst day, the 3 rd day and the 28 th day after single application is increased by 60-90% and 25-60% respectively when it is added at standard blend dosage. As the result, compression strength, tensile strength, buckling strength and modulus of elasticity will be improved to some extent.3.Improve miscibility of concrete amalgamator with water and collapsibility as well. As a condition of equivalent blending, collapsibility can be increased 5-8 times when it is added at 0.7% blend dosage.4.15-20% of cement can be reserved when the agent is blended at 0.7% blend dosage, which is preconditioned by same collapsibility and strength.

III.        PARAMETERS & ACCEPTANCE CRITERIA

INDEX ITEM	PNS-A	PNS-B	PNS-C
Appearance	Light brown powder	Light brown powder	Light brown powder
Solid Content	≥92	≥92	≥92
Sodium sulphate Content	5%	10%	20%
Chloride Content	0.3%	0.4%	0.5%
PH  Value	79	79	79
Net Starch Fluidity	≥250 mm	≥240 mm	≥230 mm
Surface Tension	70±1×10-3N/M	70±1×10-3N/M	70±1×10-3N/M

Parameters		Standard Index		UNF-A	UNF-B	UNF-C
		First Class	Regular
Water ReductionMin		20	18	22	20.1	20
Water PenetrationMax		90	95	15	80	85
Air ContentMax		3.0	4.0	2.0	2.0	2.0
Temporal distribution for setting(min)	Initial Setting Time	90120		+22	+22	+22
	Terminal Setting Time			+16	+16	+16
Compression Strength	1d	140	130	156	156	156
	3d	130	120	152	152	152
	7d	125	115	146	146	146
	28d	120	110	138	138	138
Shrinkage	90d	135		82	82	82
Corrosion to Steel Bars		None		None	None	None

IV.     USAGE:

1.       Blending dosage at 0.5%-1.0%, 0.6% mixing dosage advised.

2.       Prepare solutions as required.

3.        Direct use of powder agent is allowed. Alternatively the addition of the agent is followed by water moisturization (water-cement ratio:60%).

PNS-A superplasticizer