Sunday, 19/11/2017 | 1:51 UTC+8
  • compressive
    Measurement of concrete strength

    Traditionally, this is done by preparing concrete cubes or prisms, then curing them for specified times. Common curing times are 2, 7, 28 and 90 days.  After reaching the required age for testing, the cubes/prisms are crushed in a large press. The SI unit for concrete strength measurement is the Mega Pascal, although ‘Newtons per

    Read more
  • Concrete
    What is Setting & Hardening in concrete?

    The processes of ‘setting’ and ‘hardening’ are often confused: Setting is the stiffening of the concrete after it has been placed. A concrete can be ‘set’ in that it is no longer fluid, but it may still be very weak; you may not be able to walk on it, for example. Setting is due to

    Read more
  • Functions of chemical admixtures

    Chemical admixtures are the ingredients in concrete other than portland cement, water, and aggregate that are added to the mix immediately before or during mixing. Producers use admixtures primarily to reduce the cost of concrete construction; to modify the properties of hardened concrete; to ensure the quality of concrete during mixing, transporting, placing, and curing;

    Read more
  • Introduction of Admixtures in concrete

    Many important characteristics of concrete are influenced by the ratio (by weight) of water to cementitious materials (w/cm) used in the mixture. By reducing the amount of water, the cement paste will have higher density, which results in higher paste quality. An increase in paste quality will yield higher compressive and flexural strength, lower permeability,

    Read more
  • What Is Super Strength Pile (SS Pile)?

    Super Strength Pile or SS pile is another type of piling which has higher strength and able to carry more loads from any structure with fewer number of points. Most probably SS piles are made of prestressed or spun concrete. SS piles are constructed in round and hollow in cross section and have the lengths

    Read more
  • Function of Pile Foundation

    As other types of foundations, the purpose of pile foundations is: – To transmit the buildings loads to the foundations and the ground soil layers whether these loads vertical or inclined – To install loose cohesion less soil through displacement and vibration. – To control the settlements; which can be accompanied by surface foundations. –

    Read more
  • Pile foundation – need and functions

    Pile foundation is required when the soil bearing capacity is not sufficient for the structure to withstand. This is due to the soil condition or the order of bottom layers, type of loads on foundations, conditions at site and operational conditions. Many factors prevent the selection of surface foundation as a suitable foundation such as

    Read more
  • Grouting work construction

    Grouting work is one technique used intensively for soil improvement. The main function is to achieve a stronger, denser and less permeable soil or rock, reduce settlement of stratum and fill the void around lower ground structures. This technique is to insert some kind of stabilizing agent into the ground by pressure grouting machine, the

    Read more
  • What is Bore Piles?

    Bored pile is another type of reinforced concrete pile which is used to support high building which has heavy vertical load. Bored pile is a cast-in-place concrete pile where the bored piles have to be cast on construction site, while other concrete piles like Spun Pile and Reinforced Concrete Square Pile are precast concrete pile

    Read more
  • What is low heat cement?

    Hydration of cement is an exothermic process that produces large quantity of heat. In mass concrete structures such as dams, retaining walls, bridge abutment, raft and etc. the rate of dissipation of heat of hydration from the surface is much lower than that generated. It causes rise in temperature inside the concrete mass and may

    Read more
F