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Advances in Concrete Construction Volume 3, Number 1, March 2015 , pages 001-14 DOI: https://doi.org/10.12989/acc.2015.3.1.001 |
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Technical and economical feasibility of using GGBS in long-span concrete structures |
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Kangkang Tang, Steve Millard and Greg Beattie
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| Abstract | ||
| China accounts for nearly half of the global steel production. As a waste material or a by-product in the manufacture process, a large amount of blast furnace slag is generated every year. The majority of recycled blast furnace slag is used as an additive in low-grade blended cement in China (equivalent to the UK CEM II or CEM III depending on the slag content). The cost of using ground granulated blast furnace slag (GGBS) in such low-grade applications may not be entirely reimbursed based on market research. This paper reports an on-going project at Xi\'an Jiaotong-Liverpool University (XJTLU) which investigates the feasibility of using GGBS in long-span concrete structures by avoiding/reducing the use of crack control reinforcement. Based on a case study investigation, with up to 50% of CEM I cement replaced with GGBS, a beneficiary effect of reduced thermal contraction is achieved in long-span concrete slabs with no significant detrimental effect on early-age strengths. It is believed that this finding may be transferable from China to other Asian countries with similar climates and economic/environmental concerns. | ||
| Key Words | ||
| concrete thermal contraction; finite element analysis | ||
| Address | ||
| Kangkang Tang: Department of Civil Engineering, Xi | ||
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