市政技术2026，Vol.44Issue(5)：66-73,8.DOI:10.19922/j.1009-7767.2026.05.066
高性能潮喷混凝土基准配合比试验研究
Experimental Study on Baseline Mix Ratio of High-performance Wet Shotcreting
摘要
Abstract
In order to explore the influence of different components on concrete strength,a full-scale model test of the TBM water diversion tunnel lattice high-performance wet shotcreting support structure was conducted based on a water diversion tunnel project in Xinjiang.Based on the benchmark mix ratio of high-performance wet shotcreting,the influence of key factors such as cementitious material dosage,water cement ratio,silica fume content,sand ra-tio and fiber content on the strength of high-performance wet shotcreting were studied under a single variable.The research results indicate that:1)The dosage of cementitious material needs to be coordinated with parameters such as water cement ratio and admixture,the high-performance wet shotcrete exhibits the best compressive strength at all ages with the optimal dosage of cementitious material of 480 kg/m3.2)When the content of silica fume is 7％to 10％,the compressive strength of high-performance wet shotcreting is better.The compressive strength reaches its peak with 7％content of silica fume.3)By coarse aggregates with a particle size of 5～10 mm,a sand ratio of 0.41 can achieve the highest compressive strength for high-performance wet shotcreting.4)When the fiber content is 3～9 kg/m3,the compressive strength and splitting tensile strength of high-performance wet shotcreting show a single peak variation characteristic of first increasing and then decreasing.Among them,the strength reaches its peak at all ages when the optimal fiber content is 6 kg/m3.5)The final benchmark mix ratio for high-performance wet shotcret-ing is determined as follows:the dosage of cementitious material is 480 kg/m3,the water cement ratio is 0.38,the dosage of silica fume is 7％,the sand ratio is 0.41,the fiber dosage is 6 kg/m3,the dosage of water reducer is 1.2％,and the dosage of accelerator is 7％.Under the mix ratio,both the mechanical and construction properties of the concrete are excellent.关键词
高性能/潮喷混凝土/配合比/水胶比/力学性能Key words
high-performance/wet shotcreting/mix ratio/water-binder ratio/mechanical property分类
建筑与水利引用本文复制引用
白国岗..高性能潮喷混凝土基准配合比试验研究[J].市政技术,2026,44(5):66-73,8.基金项目
中铁十八局集团有限公司科技开发项目:引水隧洞格构式高性能混凝土支护结构足尺(模型)试验(CR18GK-25-22) （模型）
