Instructions for use of water reducing agent

Polycarboxylic acid-based high-performance water-reducing agent

1. The dosage is 0.4% to 2.0% of the total weight of the cementitious material, and the commonly used dosage is 0.4% to 1.2%; A concrete trial mix test should be carried out before use in order to obtain the best dosage;

2. It cannot be used in combination with naphthalene series high-efficiency water reducing agent. When used in combination with other admixtures, the concrete should also be prepared in advance. Compatibility test;

3. Slump is highly sensitive to water consumption, and water consumption must be strictly controlled during use;

4. Pay attention to concrete surface maintenance.

Naphthalene series high-efficiency water reducing agent

1. Dosage range: powder: 0.75-1.5%; liquid: 1.5-2.5%.

2. When using porous aggregate, it is advisable to add water and stir first, then add water-reducing agent.

3. When the slump is large, attention should be paid to the vibrating time not to be too long to prevent bleeding and delamination.

HSB aliphatic high-efficiency water-reducing agent

1. Find the optimal dosage through experiments, the recommended dosage is 1.5-2%;

2. HSB is added to the concrete together with the mixing water, or it can be added later. When adding HSB concrete, the stirring should be extended for 30 seconds;

3. Due to the large water reduction rate of HSB, the surface of the concrete will leak out before it initially sets. A layer of yellow pulp appears, which is normal. The color will disappear after the concrete is pounded and grouted, or the color will disappear naturally after the concrete is strengthened. The color will disappear faster through watering and curing without affecting the internal and surface properties of the concrete.