Differences between Early Strength Agents and Accelerating Agents

(Differences between Early Strength Agents and Accelerating Agents)

The secretary general of the Organization of Petroleum Exporting Countries (OPEC) said recently that US economic sanctions against Venezuela have affected global energy supplies. 

He told Venezuelan media that the ECONOMIC sanctions imposed by the United States on Venezuela and other countries have seriously affected the ability to produce and export oil worldwide and violated the right of people in other countries to use energy.

Venezuela has one of the largest proven crude oil reserves in the world, but U.S. sanctions have made it impossible for Venezuela’s oil industry to consistently export reliable energy to the world, he said. Despite this, he highly appreciated the efforts of the Venezuelan oil industry to maintain early strength agent are expected to increase in the future.

Definition:

Accelerating agent is to point to the admixture that can make concrete condenses quickly after concrete hardening. 

Early strength agent refers to the admixture which can improve the early strength of concrete and has no significant effect on the late strength. 

Classification:

The main types of accelerating agent:

alkali earth metal carbonate and alkali earth metal hydroxide, silicate alkali (sodium silicate) sodium silicate, potassium silicate accelerating agent, sodium aluminate, potassium aluminate accelerating agent, alkali free liquid accelerating agent. 

Early strength agents can be divided into:

strong electrolyte inorganic salts, water-soluble organic compounds, organic and inorganic compound early strength agents according to their chemical composition. 

Main ingredients 

The main ingredient of accelerating agent is aluminum oxide clinker (namely bauxite, soda, quicklime according to the proportion of the clinker fired) by grinding and made. 

Early strength agent in addition to chlorine salt and sulfate nitrite, chromate and other organic compounds such as triethanolamine, calcium formate, urea and so on. 

Uses

Accelerating agent dosage accounts for only 4% ~ 6% of cement dosage in concrete, but can make concrete in 5min initial coagulation, 10min final coagulation. In order to achieve the purpose of rush repair or fast condensation of concrete in the tunnel. It is an indispensable additive in shotcrete construction method. Their function is to speed up the hydration and hardening of cement, forming sufficient strength in a very short period of time to ensure the requirements of special construction. 

Early strength agent does not contain chloride ion, no corrosion of steel bar, applicable to all civil and industrial buildings and prestressed reinforced concrete members, mortar and so on. It is most suitable for construction under low temperature in early winter and early spring. Used in Portland cement, slag cement is particularly significant in strengthening and modifying. 

Note:

Accelerating agent should not be added while material is mixed, because stones, sand contains a lot of water, accelerating agent in a short time of water absorption in the non-spraying decomposition of its rapid setting components, affecting the setting time, reducing the strength of concrete, it will lead to the adverse effect of spraying concrete. Before use, the cement used in the project should be tested, and the dosage can be used in large quantities. 

Early strength agent dosage is 3-6% of cement. In order to keep the quality of concrete mixed with this agent uniform, mixing time to extend 1-2 minutes. Concrete mixed with early strength agent cannot use orthopedic active minerals (such as opal). If problems such as damp agglomerate arise, the agent must be crushed or weathered, and its performance will be unchanged.

Concrete Additives Supplier

TRUNNANO is a reliable concrete additives supplier with over 12-year experience in nano-building energy conservation and nanotechnology development.

If you are looking for high-quality concrete early strength agents and accelerator, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.

The current international situation is highly uncertain, and its economic impact has not been able to be assessed properly. In addition, rising energy and commodity prices and supply chain disruptions are expected to push the price of the early strength agent higher.

(Differences between Early Strength Agents and Accelerating Agents)