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The blending of GGBS & Fly Ash in cement
July 8, 2015@10:48 amIt is common that incorporating Ground Granulated Blastfurnace Slag (GGBS) and / or Fly Ash in the Portland Cement (OPC). It will be advantages in lowering Rapid Chloride Permeability Test (RCPT) and minimising Alkali Silica Reaction (ASR) risk. In fact, triple blends (OPC / GGBS / Fly Ash) performs better than either the OPC/Fly Ash
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Blended Cement in Malaysia
July 6, 2015@10:24 amIn Malaysia, regarding the cement specifications on use of blended cement with 25% Fly-Ash, cement supplier sometimes will propose on use of Ground Granulated Blastfurnace Slag (GGBS) as an alternative to Fly-Ash based on the logistic reasons, location of factory, stock available & etc. 25% Fly-Ash specified in the project will fall under CEM IIB-V
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In term of low temperature, GGBS or Fly Ash better?
July 5, 2015@1:07 pmIn 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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Type of cement used in Marine
July 5, 2015@12:30 pmFor 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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Blastfurnace Cement as an alternative to Sulphate Resisting Portland Cement (SRPC)
July 4, 2015@9:55 amIn practice, cement supplier will counter propose to the contractor the use of an equivalent product for Sulphate Resisting Portland Cement (SRPC) which is Blastfurnace Cement complying to MS EN 197-1, CEMIII/B. One of the advantage is due to the pricing issues (Blastfurnace Cement is much cheaper). Blastfurnace Cement usually is manufactured with the combination of
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Production of Blastfurnace Cement
July 4, 2015@9:40 amBlastfurnace Cement is a special blend of two components; ground granulated blastfurnace slag (GGBS) and portland cement (OPC). GGBS is a by-product of the iron-making process in a blastfurnace. It is produced by the rapid water-quenching of the molten slag under controlled conditions. This granulation process yields sand-sized particles of highly glassy material of high
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What is low heat cement?
June 25, 2015@6:29 pmHydration 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
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5 benefits of GGBS & Fly Ash in the concrete
June 9, 2015@10:49 amThere 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?
June 8, 2015@2:17 pmFly 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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How many types of cement available in Malaysia?
June 8, 2015@2:00 pmCement not only one type, Portland Cement. In the past, we called Ordinary Portland Cement (OPC). There are total 5 types of cement complying Share us on:
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