摘要
大型混凝土渡槽易发生收缩开裂，严重影响渡槽的耐久性。掺新型膨胀材料可补偿混凝土收缩，降低和抑制混凝土渡槽开裂。采用平板法和圆环法对混凝土渡槽早期抗裂性能进行研究，探讨新型膨胀材料对混凝土渡槽早期塑性开裂性能的影响。研究结果表明：掺4％-8％的膨胀材料可有效补偿和降低混凝土收缩，降低和抑制裂缝的产生和扩展，掺8％的抗裂性能最佳。
Cracks occur easily in large concrete aqueducts, which affect the durability of the aqueducts. A novel expansive agent was used to compensate the autogenous deformation, and to reduce the aqueduct cracks caused by concrete shrinkage.To study the influence of the new expansive materials on the early - age cracking behaviors of concrete aqueduct, the cracking behaviors of concrete aqueduct was analyzed using the modified flat - type specimen and ring test. The results show that the optimal content of expansive materials is 4% to 8%of cementing material.Under the conditions of the optimal content,the early age cracking resistance of concrete is higher than other content,the crack resistance performance is best when the content is 8%.
出处
《混凝土》
CAS
北大核心
2015年第1期83-85,89,共4页
Concrete
基金
南水北调
江苏省六大人才(JZ-010)
博士后基金(1301057B
2014M551588)
江苏省建设厅项目(2013ZD12)
南航大学生基金
关键词
渡槽
膨胀材料
混凝土
抗裂
早期
aqueduct
expansive material
concrete
enti - cracking
early
