粉煤灰基超高性能混凝土配合比优化研究
Study on the Optimum Mix Ratio of Fly Ash based Ultra-high Performance Concrete
刘超群 1朱泽文 2代力 2陈磊伟 3吴福全 1李亮华3
作者信息
- 1. 江西省交通投资集团有限责任公司项目建设管理公司,江西 南昌 330013
- 2. 江西省交通科学研究院有限公司,江西 南昌 330013;长大桥梁建设技术及装备交通运输行业研发中心,江西 南昌 330013
- 3. 华东交通大学,江西 南昌 330013
- 折叠
摘要
粉煤灰部分取代水泥制备UHPC,研究粉煤灰基矿物外加剂FA-ad、减水剂种类及掺量、灰砂比、胶凝材料配比、水胶比和钢纤维掺量对UHPC流动性和力学性能的影响,并结合上述因素对UHPC的配合比进行优化.结果表明:粉煤灰基矿物外加剂FA-ad对UHPC流动性影响最大;SD～600P～02 减水剂效果最好;灰砂比为1∶1 时较合适,矿物掺合料最优掺量为25%,最优水胶比为0.18,钢纤维最优掺量为2%.
Abstract
The fly ash partially replaces cement to prepare UHPC.The effects of fly ash-based mineral admixture FA-ad,the type and content of superplasticizer,sand,the ratio of fly ash to sand,the ratio of cementitious materials,the water-binder ratio and the content of steel fiber on the fluidity and mechanical properties of UHPC are studied,and the mix proportion of UHPC is optimized by combining the above factors.The results show that FA-ad,a mineral admixture based on fly ash,has the greatest influence on the fluidity of UHPC.SD～600P～02 water reducing agent has the best effect;The sand-cement ratio of 1:1 is more suitable,the optimum content of mineral admixture is 25％,the optimum water-binder ratio is 0.18,the optimum dosage of steel fiber is 2％.
关键词
超高性能混凝土/粉煤灰/流动性/力学性能/配合比Key words
ultra-high performance concrete/fly ash/fluidity/mechanical properties/mix rat引用本文复制引用
基金项目
江西省自然科学基金资助项目(20202BABL214043)
江西省交通运输厅重大工程科技项目(2021C0008)
江西省交通运输厅科技项目(2022H0014)
出版年
2024
NETL
NSTL
万方数据