Superplasticizing additive HEMIX LH

Additive Description

HEMIX LH is a superplasticizer, strength gain gas pedal, water reducer, metal corrosion inhibitor.

It refers to the type of anti-freeze additives for “warm” concrete and in terms of consumer properties meets the requirements of GOST 24 211-2008 "Additives for concrete and mortars. General technical conditions".

Field of application

HEMIX LH is used as a superplasticizer and antifreeze additive for the production of ready-mixed concrete of class B7.5 and higher at subzero temperatures (down to -25 °C).

It can be used in the production of concrete for prestressed structures. Maximum strength growth is ensured when the concrete is heated from outside.

The admixture is optimal for the production of ready-mixed concrete with high slump (> 22 cm).

The use of the admixture allows:

• obtain mixtures with higher plasticizing and antifreezing properties at a lower value of water-cement ratio;
• to achieve rapid concrete strength gain;
• to ensure curing at low and negative temperatures (down to -25 °С);
• to obtain mobility without reducing concrete strength;
• to increase mobility retention;
• to increase resistance to delamination;
• to improve the quality of compaction of the mixture structure;
• to reduce corrosivity

Mechanism of action

The principle of action is based on the adsorption of polycarboxylate ester molecules with different molecular weights combined with the complex effect of accelerated strength gain.

The addition of HEMIX LH initiates the dispersion process: due to electrostatic repulsion forces, the particles cannot come closer together and form conglomerates. As a result, the amount of water required for mixing and producing concrete mixtures with the desired characteristics is reduced.

Additionally, the solubility of cement decreases, clinker minerals hydrate, and the number of new formations in the cement stone increases. As a consequence, the strength of the mix is increased.

Dosage

The additive should be introduced in the amount of 1.00-2.2% of the cement weight. The exact dosage depends on the concrete requirements and is calculated in laboratory conditions.

Application

Mix the admixture before use.
Introduce HEMIX LH into the concrete mix together with the first or the last third of the water required for mixing.
Allow sufficient mixing time after the admixture has been added.
Important: HEMIX LH must not be added to dry mix.