FDN materials

FDN materials ,content:beta-naphthalene sulphonate formaldehyde,high range water-reduction .
FDN materials
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 & CHARACTERISTICS
1.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
FDN-A
FDN-B
FDN-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
-3
N/M
70±1×10
-3
N/M
70±1×10
-3
N/M
Parameters
Standard Index
SNF-A
SNF-B
SNF-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%).