Which is self-curing concrete admixture?

Self-curing concrete is one type of modern concrete, which cure itself by retaining water (moisture content) in it. The use of POLYETHYLENE GLYCOL in conventional concrete as an admixture helps better hydration and hence the strength of concrete.

What are different types of admixtures?

There are five distinct classes of chemical admixtures: air-entraining, water-reducing, retarding, accelerating, and plasticizers (superplasticizers).

What are self-curing materials?

Self-curing technology is the process which hydrate the cement internally in concrete, no external source needed for curing such as water curing. Mostly concrete goes under extensive self-desiccation, autogenous shrinkage and other properties of concrete can be affected due to improper curing.

How many major types of concrete admixtures are there?

Concrete admixtures are used to improve the behavior of concrete under a variety of conditions and are of two main types: Chemical and Mineral.

Where is self curing concrete used?

Abstract: Self-cured concrete is a type of concrete with a special ability to reduce autogenous shrinkage responsible for early-stage cracking. It is useful generally for the construction of high rise buildings and bridges.

What are the different methods of concrete mix design?

Methods of Concrete Mix Design: 5 Methods | Concrete Technology

• American Method of Mix Design:
• Graphic Method of Mix Design:
• Mix Design by Indian Standard Method:
• American Concrete Institute Method of Mix Design:
• Rapid Method of Mix Design:

What is concrete curing?

Curing of concrete is defined as providing adequate moisture, temperature, and time to allow the concrete to achieve the desired properties for its intended use. When these recommendations are properly specified and performed in the field, the final properties of the concrete mixture will be achieved.

What are the admixtures used in concrete?

15 Types of Admixtures Used in Concrete

• Water Reducing Admixtures.
• Retarding Admixtures.
• Accelerating Admixtures.
• Air Entraining Concrete Admixture.
• Pozzolanic Admixtures.
• Damp-proofing Admixtures.
• Gas forming Admixtures.
• Air detraining Admixtures.

What are the different types of concrete?

The Types of Concrete

• Normal Strength Concrete. This concrete combines all the basic ingredients — concrete, sand and aggregate — using the 1:2:4 ratio.
• Plain or Ordinary Concrete.
• Reinforced Concrete.
• Prestressed Concrete.
• Precast Concrete.
• Lightweight Concrete.
• High-Density Concrete.
• Air-Entrained Concrete.

What is the use of admixtures in concrete?

Admixtures are used in concrete to alter its properties in various ways. Some common uses include improving workability, increasing or decreasing cure time, and increasing concrete strength. Admixtures can also be used for aesthetic reasons, such as to change the color of the cement.

What are the three main methods used to design concrete mixes?

Rapid Method of Mix Design.

• American Method of Mix Design:
• Graphic Method of Mix Design:
• Mix Design by Indian Standard Method:
• American Concrete Institute Method of Mix Design:
• Rapid Method of Mix Design:

What is curing of concrete explain the various methods of curing?

There are three basic ways of curing concrete. The first involves keeping the surface of the concrete moist by the use ponding, spraying/sprinkling, damp sand or damp hessian. The second prevents the loss of moisture from the concrete by covering it with polythene sheeting or leaving the formwork in place.

What are the types of admixtures in concrete?

Concrete admixture is defined as the material other than the aggregate, water and cement added to the concrete. 1. Water Reducing Admixtures 2. Retarding Admixtures 3. Accelerating Admixtures 4. Air Entraining Concrete Admixture 5. Pozzolanic Admixtures 6. Damp-proofing Admixtures 7. Gas forming Admixtures 8. Air detraining Admixtures 9.

How to use self-curing agent in concrete?

Now, a self-curing agent such as polyethylene-glycol or saturated lightweight aggregate is added gradually during the mixture of concrete. The mixing is done for at least two minutes and keeps in mind that no segregation occurs. The workability of concrete should be proper according to the design mix.

What is the best liquid admixture for concreting?

Liquid admixtures, from left to right: antiwashout admixture, shrinkage reducer, water reducer, foaming agent, corrosion inhibitor, and air-entraining admixture. (69795) Despite these considerations, it should be borne in mind that no admixture of any type or amount can be considered a substitute for good concreting practice.

What are the advantages of using a concreting admixture?

Concrete admixtures can improve concrete quality, manageability, accelerate or delay setting time and other properties, and can achieve specific effects by changing these properties.