摘要
抛填骨料工艺是一种制备骨料嵌锁型混凝土的有效方法。基于已有混凝土细观结构的定量模型,计算了抛填骨料混凝土中的砂浆层厚度,研究了抛填率和抛填骨料粒径对混凝土抗压强度以及砂浆层厚度的影响。结果表明:抛填骨料工艺提升了混凝土抗压强度,但存在最佳抛填率;抛填骨料粒径也存在最佳范围,当抛填骨料粒径稍大于基准混凝土中的骨料最大粒径时,对抗压强度的提升作用更为明显。根据抗压强度与砂浆层厚度之间的关系,在设计抛填骨料混凝土时,应以1mm的砂浆层厚度为参考,确定最佳抛填率。
The distributing-filling aggregate process is an effective method to prepare aggregate-interlocking concrete.Based on the proposed quantitative model for the mesostructure of concrete,the mortar thickness in the distributing-filling aggregate concretes is calculated with the existing model,and the effect of the distributing-filling ratio and the size of distributing-filling aggregate on the compressive strength of concrete and the mortar thickness are studied.The results show that the distributing-filling aggregate process improves the compressive strength of concrete,but the best distributing-filling ratios exist for the different reference concretes.The size of the distributing-filling aggregate also has the best range,and when the size of the distributing-filling aggregate is slightly larger than the maximum size of the aggregate in the reference concrete,the improvement on compressive strength is more obvious.According to the relationship between the compressive strength and the mortar thickness,when designing the distributing-filling aggregate concrete,the optimal distributing-filling ratio could be determined by using the mortar thickness of 1 mm as the reference.
作者
李明海
许鸽龙
张正
代晓鹏
李鹏飞
沈卫国
LI Ming-hai;XU Ge-long;ZHANG Zheng;DAI Xiao-peng;LI Peng-fei;SHEN Wei-guo(Enshi State Highway Bureau,Enshi 445003,China;Kaifeng Research Center for Engineering Repair and Material Recycle,Henan University,Kaifeng 475004,China;State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China;Poly Changda Engineering Co Ltd,Guangzhou 510630,China)
出处
《武汉理工大学学报》
CAS
北大核心
2020年第11期26-30,共5页
Journal of Wuhan University of Technology
基金
湖北省公路局科技项目(2016年交通科技项目).
关键词
骨料嵌锁型混凝土
抛填率
抛填骨料粒径
抗压强度
砂浆层厚度
coarse aggregate interlocking concrete
distributing-filling ratio
distributing-filling aggregate size
compressive strength
mortar thickness
