Concept of Segregation of Concrete Segregation of concrete means separation of ingredients from design fresh concrete resulting in the non-uniform mix. More specifically this implies the separation of coarse aggregates from the mortar because of differences in size, density, shape and other properties of ingredients in which they are composed. Because of segregation honeycomb is … Read more
Concept of Bleeding of Concrete. concrete mix design is a very precise science to achieve design concrete strength. If concrete ingredients are not mixed properly many concrete related problems can result and affect the strength and durability of concrete. Bleeding is one of the concrete related problems. It is mostly observed in a highly wet mix … Read more
Concept of High Performance Concrete (HPC) A concrete mixture which has high workability, high strength, high modulus of physical property, high density, high dimensional stability, low permeability and resistance to chemical attack is generally said to be high performance concrete. The American Concrete Committee on High Performance Concrete includes the following six criteria: Ease of … Read more
Introduction to Lightweight Concrete Lightweight concrete is a special type of concrete which weighs lighter than conventional or normal concrete. Density of light weight concrete is conventionally low. Generally 300 kg/m³ to 2200 kg/m³ and thus normal concrete has density between 2200 kg/m³ to 2600 kg/m³. Principle of Lightweight Concrete The basic principle behind the … Read more
What is Meant by Stone Dressing ? The stone dressing is a process of surfacing and shaping of rocks available naturally. The place where the rocks are abundantly available is called as a quarry. The process of taking stones from the natural bed is known as ‘Quarrying’. The operation of stone dressing is generally carried … Read more
What is the Concept of Prestressed Concrete ? In case of big concrete construction projects like bridges, steel reinforcement bars alone won’t be sufficient to provide the necessary tensile strength. Pre-stressed concrete is used in all kinds of structures from bridges to buildings, silos and tanks. It’s a great way to minimize cracking and take fuller … Read more
What is Grades of Concrete ? As an Civil Engineer you could have come across the mentions of grades of concrete such as : M25 concrete for the RCC work in a foundation. M20 concrete for the roof slab. M15 concrete for PCC works etc. Have you ever wondered what do these grades of concrete … Read more
What is Bituminous Road Bituminous road consist of their surface with bituminous materials which is also called as Asphalt. It is sticky dark viscous liquid obtained from natural deposits like crude petroleum. Different Types of Bituminous Surfaces. 1. Prime Coat : This is a single coat of low viscosity bituminous binder. This coat is applied … Read more
What is Earth Road ? When the foundation and wearing surface of the road consists of one or two compacted layers of an ordinary soil or stabilized soil then such road is called as “Earth Road’ Types of Earth Roads : There are mainly two types of earth roads : Ordinary Earth Road. Stabilized Earth … Read more
WBM Road (Water Bound Macadam Road). WBM road means water bound macadam road. The wearing surface of WBM road consist of clean and crushed aggregates which are mechanically interlocked by rolling operation. The material is bound with filler material (which are also called as screenings) and water, laid on prepared base course. WBM road is … Read more