T-e Concrete®/セメント・ゼロ型，Carbon-Recycleを用いたプレキャストカーテンウォールの熱変形性及び耐久性試験
プレキャストカーテンウォールに対するT-e Concrete®/セメント・ゼロ型，Carbon-Recycleの適用を目的に開発を進めている。本論文では，様々な要求性能のうち，日射熱による熱変形性・耐久性，および，風や地震への抵抗性に係る曲げ性能について実験を実施して検証した。熱変形性・耐久性は，セメント・ゼロ型およびCarbon-Recycleと普通コンクリートを比較した4体の試験体について（一財）建材試験センター「実大外壁等の日射熱による熱変形性及び耐久性試験」に準じた試験を実施した。さらに，曲げ性能は，耐久性試験実施の有無も要因とする試験体8体について2点載荷の曲げ試験を実施した。試験の結果，T-e Concreteでは熱変形および曲げ変形によりややひび割れやすい特性があるが，その他の特性は本試験の範囲では普通コンクリートと大きな差異が見られないことを示した。実施適用に向けてさらに性能検証を進めていく。
キーワード：環境配慮コンクリート，プレキャストコンクリート，外壁，曲げ，ひび割れ
＊１ 技術センター 都市基盤技術研究部 構造研究室
＊２ 技術センター T-e Concrete実装プロジェクトチーム
Tests on Thermal Deformation and Durability of Precast Curtain Walls Using T-e Concrete®/"Zero-Cement Type" and T-e Concrete®/"Carbon-Recycling"
Development has been undertaken to apply T-e Concrete/"Zero-Cement Type" and T-e Concrete/"Carbon-Recycling" to precast curtain walls. Among various required performances, this paper examines the thermal deformation and durability of precast curtain walls using T-e Concrete due to solar radiation heat, as well as its bending performance related to resistance to wind and earthquake loads. The tests on the thermal deformation and durability of T-e Concrete/Zero-cement Type and T-e Concrete/Carbon-Recycling were conducted using four specimens by comparing their performance with that of ordinary concrete in accordance with the method of deformation and durability by solar radiation for exterior members with actual size established by the Japan Testing Center for Construction Materials. In addition, two-point bending tests were conducted on eight specimens to determine whether undergoing the durability test could affect their bending performance. The test results showed that the T-e Concrete specimens were somewhat prone to cracking due to thermal or bending deformation, but other properties were similar to those of ordinary concrete within the scope of the test. Further performance verification will be conducted in preparation for practical application.
Keywords: environmentally friendly concrete, precast concrete, exterior wall, bending, crack
*1 Structure Research Section, Urban Engineering Research Department, Taisei Advanced Center of Technology
*2 T-e Concrete Implementation Project Team, Taisei Advanced Center of Technology