Civil Engineering Forum

Origin and Classification of Aggregates

Origin and Classification of Aggregates Most of the properties of an aggregate derive from its parental rock chemical and mineral composition which affects strength, stiffness, density, pore structure and permeability. Rocks experience geothermal and weathering

Pervious Concrete

TeamCivil Concrete, Types

Pervious Concrete Pervious concrete is a type of concrete with a system of interconnected pores allowing water to rapidly drain through. Pervious concrete itself is made up of coarse aggregate that is coated by a

Characteristics of High volume Fly Ash Concrete

TeamCivil Concrete, Types

Flyash Flyash is the by-product of the combustion of pulverized coal and is collected by mechanical and electrostatic separators from the fuel gases of power plants where coal is used as a fuel and the

Types of Chemical Admixtures

TeamCivil Concrete, Materials

Admixtures A material other than water, aggregates, or cement that is used as an ingredient of concrete or mortar to control setting and early hardening, workability, or to provide additional cementing properties. Why is admixture

Formwork Materials

TeamCivil Construction

Formwork materials can be classified as: 1. Timber 2. Metals 3. Plastics 1.Timber a. Lumber: Lumber is commonly available material and has excellent strength, weight and cost factor. Lumber is classified as: • Boards: 1

Information for Ordering Concrete

TeamCivil Concrete, Construction, Materials

Information for Ordering Concrete When ordering pre-mixed concrete, you will need to tell the supplier: Name and address for delivery The use of the concrete (i.e. driveway, housing slab, commercial) The amount you need in cubic

Carbonation and Corrosion

TeamCivil Concrete, Durability

Carbonation is the term used to describe the effect of carbon dioxide on a material. The phenomenon rarely leads to structural problems but carbonation-induced corrosion can lead to unsightly spalling on structures. The repair costs,

Concrete Aggregates: Effects and Classification

TeamCivil Concrete, Materials

Aggregates: Effects and Classification Aggregates constitute a skeleton of concrete. Approximately three-quarters of the volume of conventional concrete is occupied by aggregate. It is inevitable that a constituent occupying such a large percentage of the