郑晓冬1,管志涛1,李 超1,黄 兴1,李北星2
郑晓冬,管志涛,李超,等.钢结构住宅用预制夹心保温外挂墙板的设计与应用研究[J].混凝土与水泥制品,2020(12):40-44,49.
ZHENG X D,GUAN Z T,LI C,et al. Research on Application of Tunnel Granite Cave Slag Aggregate in C50 Concrete Precast T-Beam[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):40-44,49.
隧道花岗岩洞渣骨料在C50混凝土预制 T梁中的应用研究
郑晓冬1,管志涛1,李 超1,黄 兴1,李北星2
郑晓冬,管志涛,李超,等.钢结构住宅用预制夹心保温外挂墙板的设计与应用研究[J].混凝土与水泥制品,2020(12):40-44,49.
ZHENG X D,GUAN Z T,LI C,et al. Research on Application of Tunnel Granite Cave Slag Aggregate in C50 Concrete Precast T-Beam[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):40-44,49.
摘 要:依托三峡翻坝江北高速公路项目,将隧道花岗岩洞渣加工成机制砂石骨料,并制备了C50混凝土预制T梁,通过T梁静载试验和T梁混凝土专用回弹测强曲线试验,研究了花岗岩洞渣机制骨料在C50混凝土预制T梁中的应用技术。结果表明:利用花岗岩洞渣生产的机制砂石骨料可以配制出工作性、力学性能与耐久性优良的T梁用C50混凝土,且混凝土T梁的刚度、强度及抗裂性均满足设计要求;通过试验建立的T梁用C50混凝土专用回弹测强曲线较国家通用测强曲线更精确。
Abstract: Relying on the Three Gorges Fanba Jiangbei Highway Project, the tunnel granite cave slag was processed into machine-made sand and gravel aggregate, and the C50 concrete precast T-beams were prepared. Through T-beam static load test and T-beam concrete rebound strength test curve test, the application technology of granite cave slag machine-made aggregate in C50 concrete precast T-beam was studied. The results show that the machine-made sand and gravel aggregate produced from granite cave slag can be used to formulate C50 concrete for T-beams with excellent workability, mechanical properties and durability, and the stiffness, strength and crack resistance of the precast T-beams meet the design requirements. The special rebound strength test curve for C50 concrete for T-beams established through experiments is more accurate than the national general strength test curve.
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