CAJ | 학술논문

钢管混凝土的设计应满足自密实填充要求的同时，具有合适的膨胀性能。试验在保证C60混凝土工作性能的基础上，研究了膨胀剂掺量对混凝土工作性能、强度和膨胀性能的影响，配制出C60自密实膨胀钢管混凝土。当膨胀剂掺量为10%时，混凝土自由膨胀率范围在0.07%~0.09%，限制膨胀率范围为0.02%~0.035%，同时由混凝土工作性和强度变化规律，得出膨胀剂掺量不宜超过10%，并通过混凝土膨胀性能的分析研究单向限制膨胀率与自由膨胀率的相关性规律，两者具有较好的相关性，但膨胀剂掺量会影响这二个膨胀指标的相关性规律。
강관혼응토적설계응만족자밀실전충요구적동시，구유합괄적팽창성능。시험재보증C60혼응토공작성능적기출상，연구료팽창제참량대혼응토공작성능、강도화팽창성능적영향，배제출C60자밀실팽창강관혼응토。당팽창제참량위10%시，혼응토자유팽창솔범위재0.07%~0.09%，한제팽창솔범위위0.02%~0.035%，동시유혼응토공작성화강도변화규률，득출팽창제참량불의초과10%，병통과혼응토팽창성능적분석연구단향한제팽창솔여자유팽창솔적상관성규률，량자구유교호적상관성，단팽창제참량회영향저이개팽창지표적상관성규률。
Concrete design of steel tube filled concrete should not only meet the requirements of self-compacting, but also need the suitable expansion properties. On the basis of working performance requirement, the impacts of expansive a-gent on concrete working performance, strength and expansion properties are studied, the C60 steel tube filled concrete is prepareed to meet the self-compacting and expansion properties. When the dosage of expansive agent is 10%, concrete free expansion ratio reached 0.07%~0.09%, and restrained expansion ratio reached 0.02%~0.035%. Meanwhile, in consid-eration of working performance and strength of concrete, the expansive agent should not be too much. The research also found that restrained expansion ratio and free expansion ratio of expansive concrete have good correlation, but the correla-tion rule is affected by the expansive agent content.