Thursday, 21/11/2019 | 2:52 UTC+8
  • Standard strength of a cement

    The standard strength of a cement is the compressive strength determined in accordance with EN 196-1 at 28 days and shall conform to the requirements in table below. Three classes of standard strength are included: class 32,5, class 42,5 and class 52,5 The strength classes are determined based on controlled testing with standard sand to

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  • Lime
    Limestone Powder in Malaysia

    Introduction Limestone is a sedimentary rock, formed by inorganic remains, such as shells or skeletons, that have compressed for a very long time. The main element found in limestone is calcium carbonate but it may contain magnesium, iron or manganese as well, which affect the whiteness and hardness. In Peninsular Malaysia, limestone major occurrences are

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  • In term of low temperature, GGBS or Fly Ash better?

    In Malaysia, for temperature control, both partial substitution of Portland Cement (OPC) with Ground Granulated Blastfurnace Slag (GGBS) and Fly Ash reduces heat generation. However, the level of GGBS substitution can be higher, thus the reduction of temperature is higher then Fly Ash. For example, for a 2m thick section, a 30% Fly Ash replacement

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  • Temperature rise in concrete

    In Malaysia, generally for 1m3 size concrete ~ the rule of thumb is about 13.5°C/100kg Portand Cement (OPC), for 380kg cement content, the temperature rise will be 51.3°C + 30°C or equal to 81.3°C.   If blended cement is used, the temperature rise will be proportionately lower. As the specification always allows the use of

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  • Type of cement used in Marine

    For type of cement to be used in marine conditions, there is the latest BS 8500-1:2006 + A1:2012. In Malaysia, this British Standard is also adopted into MS 523-2:2011 Concrete Specification. Please refer to the extract of BS 8500-1:2006 + A1:2012, marine conditions is under Exposure Classes XS1- XS3 (Table A.1) . Hence, considering the

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  • GGBS and Fly Ash in Malaysia

    In MS EN 197-1 on cement specifications stipulates 27 common cement, where both Ground Granulated Blastfurnace Slag (GGBS) and Fly Ash are two commonly ‘recycled’ materials used to partially replace Portland Cement (OPC) in cement production. These materials are also pozzolanic in nature i.e. they consume the lime from OPC hydration to form additional cementitious

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  • GGBS or Fly Ash in Concrete Batching Plant

    In Malaysia, cement manufactured will propose the use of pre-blended cement instead of supplying Portland Cement (OPC) mix with Ground Granulated Blastfurnace Slag (GGBS) or Fly Ash to concrete batching plant. The main reasons are less hassle and less problems in site batching. However, in most of the main concrete batching plant, they are having

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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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