Category : Concrete Technology Guide For CIvil Engineer

Concrete technology guide provides information on materials, properties, mix design. types, strength and durability of concrete.

DEPOLLUTANT PHOTO-CATALYTIC CONCRETE (DPCC)

The word photocataysis is a compound word made up of (1) photo or light and (2) catalysis or acceleration of a chemical reaction rate by addition of a catalyst. A catalyst is a substance which although combines with the reactants ...

SPALL REPAIR PROCEDURES

The repair process begins after the final cleaning of the area. The area must be dry and free of dust, oil, dirt, etc. A good repair begins with a clean surface. Since the volume of most spall repairs is usually ...

SUBSEALING JOINTED CONCRETE PAVEMENTS

Purpose of Subsealing The purpose of subsealing is to stabilize the pavement slab by the pressurized injection of a cement grout through holes drilled in the slab. The cement grout will, without raising the slab, fill the voids under it, displace ...

GREEN CEMENT

Concrete; a primary building material is extremely energy intensive to make and transport, and produces a significant amount of the world’s greenhouse gas emissions. Concrete’s impact on the environment starts when limestone is blasted in quarries to make cement – ...

GREEN CONCRETE

WHAT IS GREEN CONCRETE? Today the word green is not just limited to colour, it represents the environment, which is surrounding us. Concrete which is made from concrete wastes that are eco-friendly are called as “Green concrete”. The other name for green concrete ...

Types of Concrete Admixture and their Uses

Concrete admixture is defined as the material other than the aggregate, water and cement added to the concrete. The use of suitable admixture can result in the enhancement the performance of concrete. Types of Concrete Admixture and their Uses Following are the ...

NEW EUROPEAN STANDARDS FOR CONCRETE

European Standards are being introduced gradually to replace the current British Standards used in the construction industry. The standards are being implemented across Europe to create harmonization between all member states and remove trade barriers between members. This harmonisation will ...

PERVIOUS CONCRETE: FUTURISTIC SOLUTION TO URBAN RUNOFF?

Pervious concrete is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge. ...

HOT WEATHER CONCRETING

Placing Concrete in Hot Weather Caution needs to be applied when placing concrete in hot weather. Without the proper care, concrete may have reduced strength and will be very prone to cracking due to rapid drying. It also may stiffen quickly ...

COLD WEATHER / WINTER CONCRETING

Placing Concrete During Cold Weather If the temperature of fresh concrete is 55ºF., or greater — and if the concrete is maintained at a temperature of 55ºF. or higher — then winter concreting should be trouble-free. Approximate set time for concrete ...