超高强泵送管桩混凝土配合比优化研究  

Research on Optimization of Concrete Mix Proportion for Ultra-high Strength Pumping Pipe Pile

作　　者：胡俊华 HU Junhua(KZJ New Materials Group Fujian Co.,Ltd.)

机构地区：[1]科之杰新材料集团福建有限公司

出　　处：《广东建材》2024年第12期34-37,共4页Guangdong Building Materials

摘　　要：本文系统的研究了粉煤灰、微硅粉、超细矿粉、粘度改性掺合料对C120超高强度管桩混凝土泵送性能和蒸养、蒸压强度的影响。研究结果表明:粉煤灰和粘度改性掺合料能明显降低管桩混凝土的粘度,提升混凝土的泵送性能,但对蒸养、蒸压强度有劣化作用;超细矿粉随着掺量的提高,管桩蒸养、蒸压强度均呈上升的趋势,尤其是蒸养强度,提升程度较大,但混凝土黏性增大,泵送性能降低;微硅粉在适当掺量下,混凝土泵送性能和强度均有提升,用量过高,会降低混凝土蒸养和蒸压强度。通过科学的实验设计和严谨的数据分析,得到一种理想的混凝土配比,不仅能满足强度要求,还能有效降低混凝土的黏度,优化其泵送性能。This article systematically studies the effects of fly ash,microsilica powder,ultrafine mineral powder,and viscosity modified admixtures on the pumping performance,steam curing,and steam compression strength of C120 ultra-high strength pipe pile concrete.The research results indicate that fly ash and viscosity modified admixtures can significantly reduce the viscosity of pipe pile concrete and improve its pumping performance,but they have a deteriorating effect on steam curing and steam compression strength;With the increase of the dosage of ultrafine mineral powder,the steam curing and steam compression strength of the pipe pile show an upward trend,especially the steam curing strength,which has a greater degree of improvement,but the concrete viscosity increases and the pumping performance decreases;Under appropriate dosage of microsilica powder,the pumping performance and strength of concrete were improved.However,excessive dosage can reduce the steam curing and compression strength of concrete.Through scientific experimental design and rigorous data analysis,an ideal concrete mix ratio has been obtained,which not only meets the strength requirements,but also effectively reduces the viscosity of concrete and optimizes its pumping performance.

关 键 词：管桩 C120 掺合料 强度影响 

分 类 号：TU528[建筑科学—建筑技术科学]