Friday, 21/9/2018 | 1:00 UTC+8
  • Corrosion
    Why is Sulphate-Resisting Cement not used in Marine Concrete?

    The main components of Portland Cement are tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite. In Sulphate-Resisting Cement, it contains a low amount of tricalcium aluminate in order to avoid sulphate attack. Otherwise, tricalcium aluminate would react with sulphates to form calcium sulphoaluminate and gypsum that cause expansion and crack the concrete structure. However,

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  • What is High Alumina Cement?

    High Alumina Cement (HAC), sometimes called calcium aluminate cement or aluminous cement, is very different in its composition and in some properties from Portland Cement (OPC), but concreting techniques are similar. It has a very high rate of strength development with as much as 90 percent of its ultimate strength being achieved at the age

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  • How Concrete is made?

    Contrary to popular belief, concrete and cement are not the same thing; cement is actually just a component of concrete. Concrete is made up of three basic components: water, aggregate (rock, sand, or gravel) and Portland cement. Cement, usually in powder form, acts as a binding agent when mixed with water and aggregates. This combination,

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  • 5 benefits of GGBS & Fly Ash in the concrete

    There are many benefits to use GGBS or Fly Ash, the more significant are: IMPROVED & RETAINED WORKABILITY – for placing, ease of compaction & finishing – for coping with transport and site delays LOWER HEAT OF HYDRATION – for reduced risk of thermal cracking and long-term strength development LONG-TERM STRENGTH GAIN – for long-term

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  • What is Fly Ash?

    Fly Ash is the fine residue produced when hard or bituminous coal is burnt in power station furnace. The minerals in the coal fuse to form fine and glassy particles which contains constituents that can be used as Share us on:

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  • What is GGBS?

    Ground Granulated Blastfurnace Slag (GGBS) is a by-product from the blast-furnaces used to make iron. These operate at a temperature of about 1,500 degrees centigrade and are fed with a carefully controlled mixture of iron-ore, coke and limestone. The iron ore is reduced to iron and the remaining materials form a slag that floats Share

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