2013 Fiscal Year Final Research Report
Strength-Improvement and Crack Resistance of High Volume Fly-Ash Concrete at Early Age
| Project/Area Number |
24760349
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Yamaguchi University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | フライアッシュ / ひび割れ / 温度応力 / 石灰石 / 断熱温度上昇量 / 熱膨張係数 |
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| Research Abstract |
This study discusses numerical simulation of the thermal stress as well as experimental results establishing thermal and mechanical properties of high volume fly ash (HVFA) concrete of 50% replacement of cement by fly ash. To examine the crack resistance of the HVFA concrete at early age, a uniaxial tension test was performed and tensile properties such as tensile strength and tensile Young's modulus were quantified. Adiabatic temperature rise and CTE tests were also conducted to provide more evidence of the thermal properties. The thermal and mechanical properties of HVFA concrete were adopted in a Finite Element (FE) simulation. The numerical simulation confirmed the favorable thermal properties contributing to decrease of thermal stress.
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