摘要
针对传统护岸固脚结构物——四面六边透水框架的端部钢筋易腐蚀问题,采用自密实钢纤维混凝土取代现有普通混凝土,并取消框架内部钢筋,进行了透水框架自密实钢纤维混凝土制备试验研究。采用工程现场原材料,通过基体自密实混凝土配合比设计与试验,确定了水胶比计算公式中系数的取值,得到了预测早龄期不同混凝土强度水胶比的计算公式;然后采用配合比直接计算方法,确定了钢纤维体积率分别为0.4%,0.8%和1.2%的C25自密实钢纤维混凝土的配合比,试验测定了拌和物工作性能和养护龄期为7,28 d的抗压强度。采用整体成型技术进行了四面六边自密实钢纤维混凝土透水框架试制生产,验证了该技术的实用性和可靠性。
Monolithic six-side permeable frame is a traditional revetment structure,but its end steel bar is susceptible to corrosion.To solve this problem,the self-compacting steel fiber reinforced concrete was used to replace the traditional concrete,and the internal steel bar of the frame was canceled,and the preparation test of self-compacting steel fiber reinforced concrete for the permeable frame was carried out.The raw materials of the project site was used,the coefficient value in the formula of water-binder ratio was determined by the mix design and test of matrix self-compacting concrete,and the formula for predicting the strength of concrete with different water-binder ratio at early age was obtained.Then,the mixture ratios of C25 self-compacting steel fiber reinforced concrete with fiber volume ratios of 0.4%,0.8% and 1.2%were determined by the direct calculation method of mixture ratio,and the working performance and the compressive strength of the mixture at 7 d and 28 d curing ages were measured by experiments.At last,the trial production of self-compacting steel fiber reinforced concrete for monolithic six-side permeable frame was carried out by using the integral forming technology,which verified the practicability and reliability of this technology.
作者
耿海彬
廖一鸣
冯蒙
李晓克
GENG Haibin;LIAO Yiming;FENG Meng;LI Xiaoke(Henan Provincial Collaborative Innovation Center of High-efficient Utilization and Support Engineering of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Changjiang Yichang Waterway Bureau,Yichang 443003,China)
出处
《人民长江》
北大核心
2021年第9期198-202,共5页
Yangtze River
基金
河南省高等学校重点科研项目(19A560001)。
关键词
四面六边透水框架
自密实钢纤维混凝土
制备技术
配合比
抗压强度
工作性能
monolithic six-side permeable frame
self-compacting steel fiber reinforced concrete
preparation technique
mix proportion
compressive strength
workability
