机制砂在高扬程、长距离泵送混凝土中的应用研究  

The Application of Manufactured Sand in High-performance Concrete

作　　者：王延超 Wang Yanchao(China Railway 17th Bureau Group Second Engineering Co.,Ltd.,Xi'an,Shaanxi 710024)

机构地区：[1]中铁十七局集团第二工程有限公司,陕西西安710024

出　　处：《现代工程科技》2025年第2期65-68,共4页Modern Engineering Technology

摘　　要：传统的砂石主要依靠河道开采,其对生态环境、河床堤防、防洪安全等造成危害,甚至影响河势稳定,引发河岸崩塌灾害,给生态系统造成永久性损害。随着建筑行业的快速发展,机制砂作为混凝土的主要骨料之一,其应用日益广泛,尤其是在高扬程、长距离泵送混凝土工程中,机制砂的性能对泵送混凝土的性能和耐久性能有着很大程度的影响。通过对比天然中砂、机制砂与混合砂,系统地研究了泵送混凝土中机制砂的颗粒级配、石粉含量、粒形及砂率对高性能泵送混凝土性能的影响,旨在为机制砂在高扬程、长距离泵送混凝土中的合理应用提供理论与工程技术参考。With the rapid development of the construction industry,machine-made sand,as one of the main aggregates for concrete,is increasingly widely used.Especially in high lift and long-distance pumping concrete projects,the performance of machine-made sand has a significant impact on the pumping performance,workability,and durability of concrete.This article systematically studies the effects of particle size distribution,particle shape,sand ratio,and stone powder content of mechanism sand on the performance of C55 high-strength pumped concrete by comparing natural medium sand,mechanism sand,and mixed sand.The aim is to provide theoretical and engineering technical references for the rational application of mechanism sand in high head and long-distance pumped concrete.

关 键 词：机制砂 高扬程、长距离泵送混凝土 配合比设计 

分 类 号：TU755[建筑科学—建筑技术科学]