Table of Contents
- 1 What are the advantage of self compacting concrete?
- 2 Is self compacting concrete more expensive?
- 3 What are the characteristics of self compacting concrete?
- 4 What is a normal concrete?
- 5 What is meant by self compacting concrete?
- 6 What are the downsides to using self healing concrete?
- 7 What is the difference between high strength concrete and normal concrete?
- 8 What are the mechanical properties of self-compacting concrete?
- 9 When was the first self-compacting concrete made?
- 10 What is self consolidating concrete?
What are the advantage of self compacting concrete?
Advantages of Self-Compacting Concrete Improved constructability. Reduces permeability in concrete structures. Minimizes voids in highly-reinforced areas. Eliminates problems associated with concrete vibration.
Is self compacting concrete more expensive?
Self-compacting concrete mixes are typically more expensive, but require less labour than conventional concrete to place. Therefore material costs are lower than self-consolidating concrete.
What is the difference between normal concrete and self healing concrete?
A newly developed concrete material can heal itself when it cracks. Self-healing is possible because the material is designed to bend and crack in narrow hairlines rather than break and split in wide gaps, as traditional concrete behaves. “It’s like if you get a small cut on your hand, your body can heal itself.
What are the characteristics of self compacting concrete?
To be classified as SCC, concrete must have certain vital features: filling ability, or excellent deformability, and ability to pass through reinforcement without blocking.
What is a normal concrete?
The concrete in which common ingredients i.e. aggregate, water, cement are used is known as normal concrete. It is also called normal weight concrete or normal strength concrete. It has a setting time of 30 – 90 minutes depending upon moisture in atmosphere, fineness of cement etc.
Is self compacting concrete economical?
A benefit-cost ratio greater than 1 would suggest the use of self-compacting concrete is an economical option. The high cost of SCC when compared to conventional concrete is counteracted by the benefits it provides.
What is meant by self compacting concrete?
Self-compacting concrete (SCC) is a special type of concrete which can be placed and consolidated under its own weight without any vibration effort due to its excellent deformability, and which at the same time is cohesive enough to be handled without segregation or bleeding.
What are the downsides to using self healing concrete?
Disadvantages
- Cost of self healing concrete is double than conventional concrete.
- Growth of any bacteria is not good in any atmosphere media.
- There is no is code or other code is available.
- Investigation of calcite precipitation is costly studied.
- Skilled labour is required.
What are the admixtures used in self compacting concrete?
Types of chemical admixtures are accelerators, retarders, water-reducing agent, superplasticizer, air-entraining agent and special purpose admixtures such as shrinkage reducers, corrosion inhibitors, alkali–silica reactivity inhibitors and coloring.
What is the difference between high strength concrete and normal concrete?
The compressive strength of normal concrete is between 20 and 40 MPa. The strength of high strength concrete is above 40 MPa. The high strength concrete has compressive strength between 40 and 140 MPa which is discussed in this article. As time goes the difference between normal and high strength concrete also changes.
What are the mechanical properties of self-compacting concrete?
An experimental and numerical study on mechanical properties, such as strength, elastic modulus, creep and shrinkage, of self-compacting concrete (SCC) and the corresponding properties of normal compacting concrete (NC) is outlined in this article.
What is the difference between NCC and self-compacting concrete?
The Self-compacting concrete makes use of viscosity modifying agents (VMA) which creates problems when used in normal concrete. The VMA are pseudo polymers that helps in the reduction of aggregate segregation when compared to NCC.
When was the first self-compacting concrete made?
The usable version of self-compacting concrete was completed in 1988. It was named “High-Performance Concrete”. Later it was proposed as “Self Compacting High-Performance Concrete”. High-performance concrete is used basically for two reasons.
What is self consolidating concrete?
Self Consolidating or Self Compacting Concrete (SCC) is a highly flowable, deformable, non-segregating concrete that spreads and fills in the formwork under its own weight. Flowability is maintained by using a high range of water-reducing admixtures.