某高速公路预制T梁混凝土配合比优化设计  

Optimization Design of Concrete Mix Proportion of Precast T-beam of an Expressway

作　　者：沙鸥 赵宝生[2] 赵勇[2] 李文和 李英男 李朝康 李敏 邱成奇 朱黑沙 Sha Ou;Zhao Baosheng;Zhao Yong;Li Wenhe;Li Yingnan;Li Chaokang;Li Min;Qiu Chengqi;Zhu Heisha(Yunnan Jiantou No.2 Water Conservancy and Hydropower Construction Co.,Ltd.,Kunming 650221,China;Yunnan Academy of Architectural Sciences Co.,Ltd.,Kunming 650223,China)

机构地区：[1]云南建投第二水利水电建设有限公司,云南昆明650221 [2]云南省建筑科学研究院有限公司,云南昆明650223

出　　处：《科学技术创新》2022年第13期125-128,共4页Scientific and Technological Innovation

基　　金：云南省科技厅青年基金项目-干热河谷地区公路工程预制T梁混凝土施工浇筑质量关键技术研究;负责人:沙鸥;项目编号:2019FD022。

摘　　要：预制T梁是当前在高速公路建设中广泛应用的结构形式,目前混凝土配合比设计主要从混凝土强度、坍落度、骨料最大粒径出发,而忽略了对骨料级配等影响因素,计算得到的混凝土配合比,由于水胶比相对较大,胶凝材料用量相对偏小,混凝土工作性能相对较差,混凝土强度及弹性模量增长较慢,以某高速公路预制混凝土T梁为例,以全计算法[1]为基础,考虑骨料级配及矿粉,探讨了配合比优化设计[2]。Precast T-beam is a structural form widely used in expressway construction. At present, the concrete mix proportion design mainly starts from the concrete strength, slump and maximum particle size of aggregate, while ignoring the influencing factors such as aggregate gradation. The calculated concrete mix proportion is relatively poor due to the relatively large water binder ratio, relatively small amount of cementitious materials and relatively poor working performance of concrete, The growth of concrete strength and elastic modulus is slow. Taking a precast concrete T-beam of an expressway as an example, based on the full calculation method aggregate gradation and mineral powder, the mix proportion optimization design is discussed[2].

关 键 词：高速公路 预制T梁混凝土配合比 优化设计 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]