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    Age and Moisture Effects on Thermal Expansion of Concrete Pavement Slabs

    Source: Journal of Materials in Civil Engineering:;2012:;Volume ( 024 ):;issue: 001
    Author:
    Jin-Hoon Jeong
    ,
    Dan G. Zollinger
    ,
    Jin-Sun Lim
    ,
    Joo-Young Park
    DOI: 10.1061/(ASCE)MT.1943-5533.0000342
    Publisher: American Society of Civil Engineers
    Abstract: A mechanistic-empirical pavement design guide (MEPDG) for portland cement concrete pavement (PCCP) has been developed recently and, within it, the coefficient of thermal expansion (CoTE) of concrete is considered as a crucial variable. Previous research has suggested that the concrete CoTE is affected by the availability of moisture in capillary and gel pores. The capillary pores are filled with hydration products, and their volume decreases at an early age of the concrete. However, the variation of the concrete CoTE due to hydration and moisture has not been quantified completely. The results have varied mainly due to the development of measurement techniques. The age and moisture effects on the CoTE of concrete were investigated by measuring the temperature, humidity, and strain of a cylinder specimen at both the initial and later ages. Drying shrinkage and autogenous shrinkage were considered in the calculation of the CoTE, particularly at early concrete ages. This investigation was facilitated by moving a concrete test specimen periodically from a 60°C environment to a 10°C environment over a 6-month period. Dilatometer testing and composite modeling were also conducted to verify the age and moisture effects on the concrete CoTE. Results show a close resemblance between the CoTEs determined by these different approaches. According to finite-element (FE) analysis, the behavior of the pavement slab was significantly affected by the variation of the concrete CoTE.
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      Age and Moisture Effects on Thermal Expansion of Concrete Pavement Slabs

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    http://yetl.yabesh.ir/yetl1/handle/yetl/66704
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    contributor authorJin-Hoon Jeong
    contributor authorDan G. Zollinger
    contributor authorJin-Sun Lim
    contributor authorJoo-Young Park
    date accessioned2017-05-08T21:55:36Z
    date available2017-05-08T21:55:36Z
    date copyrightJanuary 2012
    date issued2012
    identifier other%28asce%29mt%2E1943-5533%2E0000376.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/66704
    description abstractA mechanistic-empirical pavement design guide (MEPDG) for portland cement concrete pavement (PCCP) has been developed recently and, within it, the coefficient of thermal expansion (CoTE) of concrete is considered as a crucial variable. Previous research has suggested that the concrete CoTE is affected by the availability of moisture in capillary and gel pores. The capillary pores are filled with hydration products, and their volume decreases at an early age of the concrete. However, the variation of the concrete CoTE due to hydration and moisture has not been quantified completely. The results have varied mainly due to the development of measurement techniques. The age and moisture effects on the CoTE of concrete were investigated by measuring the temperature, humidity, and strain of a cylinder specimen at both the initial and later ages. Drying shrinkage and autogenous shrinkage were considered in the calculation of the CoTE, particularly at early concrete ages. This investigation was facilitated by moving a concrete test specimen periodically from a 60°C environment to a 10°C environment over a 6-month period. Dilatometer testing and composite modeling were also conducted to verify the age and moisture effects on the concrete CoTE. Results show a close resemblance between the CoTEs determined by these different approaches. According to finite-element (FE) analysis, the behavior of the pavement slab was significantly affected by the variation of the concrete CoTE.
    publisherAmerican Society of Civil Engineers
    titleAge and Moisture Effects on Thermal Expansion of Concrete Pavement Slabs
    typeJournal Paper
    journal volume24
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0000342
    treeJournal of Materials in Civil Engineering:;2012:;Volume ( 024 ):;issue: 001
    contenttypeFulltext
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