concrete superplasticizer

concrete superplasticizer

Naphthalene series superplasticizer was synthesized by chemical non-air entraining superplasticizer.

Chemical Name naphthalene sulfonate formaldehyde condensates, the cement particles which have a

strong dispersion. The crowd on the preparation of concrete states, there are early strength, high

strength requirements situ concrete and pre-fabricated components, there is a good use of effects,

fully enhance and improve various properties of concrete, widely used in roads, bridges, dams, ports,

tunnels, power, water conservancy and civil engineering works, steam curing and the Nature Conservancy

to the system components and so on.

Currently on the market for sodium sulfate content is divided into high consistency, and low concentration.

The following is a low concentration of indicators:

First, the main technical indicators:

1, Appearance: powder, brown powder, liquid brown viscous liquid.

2, solid content: powder ≥ 94%, ≥ 40% of liquid

3, paste fluidity ≥ 230mm.

4, the sodium content of ≤ 10.

5, the chloride ion content of ≤ 0.5%.

Second, the performance characteristics:

1, in the concrete strength and slump substantially the same, the amount of cement can be reduced 10-25%.

2, in the water-cement ratio is constant, the initial slump of the concrete increased more than 10cm water

reduction of up to 15-25%.

3, a significant concrete early strength, enhance the effect, the strength of 20 to 60% increase rate.

4, to improve the workability of concrete, and comprehensively improve the physical and mechanical properties

of concrete.

5, good adaptability to various cement, and other various types of concrete admixtures good compatibility.

6, especially for use in the following concrete works: flowing concrete, plastic concrete, steam curing concrete,

permeability of concrete, waterproof concrete, nature conservation precast concrete, reinforced and prestressed

concrete, high strength ultra high strength concrete .

7, concrete slump loss is large, half-hour slump loss of nearly 40%.

Third, the dosage range:

Powder 0.75-1.5%; liquid 1.5 - 2.5%.

Fourth, note:

1 , the use of porous aggregates advised when mixing with water , plus plasticizer.

2, when the slump is larger, should pay attention to vibration time not too long , to prevent bleeding and layered .

Naphthalene superplasticizer content according to their level of Na2SO4 products can be divided into high-concentration products (Na2SO4 content < 3% ) , medium thick products (Na2SO4 content of 3% to 10% ) and

low enriched products (Na2SO4 content> 10% ) . Most naphthalene superplasticizer synthesis plant all have the

Na2SO4 content is controlled below 3% of capacity , and some can even be advanced enterprises controlled

below 0.4% .

Naphthalene superplasticizer is currently China's largest production volume , most widely used superplasticizer

( accounting for over 70% of the amount of water reducer ) , which is characterized by high water reduction

( 15% to 25% ) , not cited gas, little effect on the setting time , and adaptability of cement is relatively good,

with a variety of other additive compound used , the price is relatively cheap. Naphthalene superplasticizer is

often used in the preparation of high fluidity , high strength , high performance concrete . Pure naphthalene

superplasticizer admixture for concrete slump loss quickly. In addition, naphthalene superplasticizer with

cement adaptability needed some improvement.

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