Category : Concrete Technology Guide For CIvil Engineer

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

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 ...

TYPES OF SULPHATE ATTACK IN CONCRETE

Sulfate attack can be ‘external’ or ‘internal’. External: due to penetration of sulfates in solution, in groundwater for example, into the concrete from outside. Internal: due to a soluble source being incorporated into the concrete at the time of mixing, gypsum in ...

COMPOUNDS FORMED DURING HYDRATION OF CEMENT

Following are the compounds formed during the setting action of cement: Tricalcium silicate (C3S) – 3CaO.SiO2 Dicalcium silicate (C2S) – 2CaO.SiO2 Tricalcium aluminate (C3A) – 3CaO.Al2O3 Tetracalcium alumino ferrite (C4AF) – 4CaO.Al2O3Fe2O3   ...

Factors Affecting Modulus of Elasticity of Concrete

Factors Affecting Modulus of Elasticity of Concrete Modulus of elasticity of concrete is the ratio of stress to strain of the concrete under the application of loads. Considering the stress-strain curve of the first cycle, the modulus could be defined as ...

TYPES OF VIBRATORS FOR CONCRETE COMPACTION

Different types of vibrators are used in concrete compaction for different types of construction and structural requirements. Since concrete contains particles of different sizes, the most effective compaction of concrete can be achieved by using vibrators with different speeds of vibration. Poly-frequency concrete ...

PROPERTIES OF POLYMER MATERIALS

PROPERTIES OF POLYMER MATERIALS The civil engineer is chiefly concerned with mechanical properties and with the physiochemical which determine durability. The thermal properties and permeability are also briefly discussed here. Density of Polymer Materials Polymers are materials composed of mainly light elements, relatively ...