Difference Between Plasticizer And Superplasticizer in Civil

Difference Between Plasticizer And Superplasticizer in Civil

What Is Plasticizer In Civil?

Plasticizer

Plasticizer us in concrete for workability, Strength, and Durability of concrete. Plasticizer in concrete for Water-reducing admixtures usually reduces the required water content for a concrete mixture by about 5 to 12 percent.

The use of water-reducing admixtures is defining as Type A in ASTM C 494. The WRA mainly affects the fresh properties of concrete.

Which is measured by the dilution indicated in ASTM C 143-90. Water-reducing admixtures that delay the initial setting time by more than three hours. It is classified as a water-reducing admixture with a debugging effect (Type D).

Commonly used water-reducing admixtures (WRA) are lignosulfonates and hydrocarboxylic acids. The use of hydro carboxylic (HC) acids as WRA requires higher water content (w/c) compared to the lignosulfonates. Rapid bleeding is a problem for concrete treated with hydro carboxylic (HC) acids.

Plasticizer

The increase in a slump is different according to its types and dosage. The typical dosage rate is based upon the cementitious material content (millilitres per hundred kilograms). The figure below illustrates the influence of the dosage of Lignosulfonates and HC acid on a slump.

It is shown in the figure that Hydro Carboxylic (HC) acids give a higher slump compared to lignosulfonates with the same dosage.

Water-Reducing Admixtures (WRA) has been used primarily in hot weather concrete pumping, placing, and tremie.

Careful concrete placement is required, as an initial setting time of cement will take place an hour earlier.

It is also shown that the use of Water-Reducing Admixtures (WRA) will give a higher initial concrete compressive strength by 10% compared to the control mixture.

Another benefit of using Water-Reducing Admixtures (WRA) is that higher concrete density is achieved, which makes the concrete less permeable and has higher durability.

Also, read: How Cement is Made | Cement Ingredients | History of Cement 

What Is Superplasticizer In Civil?

Superplasticizer

This Superplasticizers, also known as high range water reducers, same as a plasticizer, are chemical admixtures used where well-dispersed particle suspension is required.

Polymers are used as dispersants to avoid particle segregation also to improve the flow characteristics of suspensions such as in concrete applications.

Superplasticizer

Their addition to mortar or concrete allows a reduction of the water to cement ratio (W/C), not affecting the workability of the mixture, and enables the production of high-performance concrete and self-consolidating concrete.

This effect drastically improves the performance of the fresh, hardening paste. Strength of concrete increases when water to cement (W/C) ratio decreases.

Their working mechanisms lack a full understanding, revealing, into certain cases, cement-superplasticizer incompatibilities.

The addition of superplasticizer in during transit is a fairly new development within the industry.

Superplasticizer added in transit through automated slump management systems, such as Verify, allows concrete producers to maintain slump until without reducing concrete quality.

Also, read: What is Plum Concrete | Application | Mix Design | Methodology

Difference Between Plasticizer And Superplasticizer in Civil

FAQ

Plasticizer and Superplasticizer

PlasticizerPlasticizers are used to increase the plasticity of polymer materials such as PVC and as a water reducer in concrete mixtures. SuperplasticizerSuperplasticizers are used to further increase the water requirement for concrete mixtures, increasing the strength and durability of concrete.

Can Plasticiser Be Used in Concrete?

Plasticizers or water reducers are chemical admixtures that can be added to concrete mixtures to improve workability. Unless the mix is “starved” of water, the strength of concrete is inversely proportional to the amount of water added or water-cement ratio.

What Is Plasticizer for Concrete?

Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more. These additives are employed at the level of a few weight percent. Plasticizers and superplasticizers retard the curing of concrete.

Superplasticizer in Concrete

Superplasticizers (SP’s), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.

 

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