Open AccessMechanical Enhancement Mechanism of Recycled Concrete Pavement
Author(s) -
Xuechao Li,
Weixing Kong,
YingYing Zheng,
Meng Sun
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1578/1/012170
Subject(s) - durability , flexural strength , aggregate (composite) , cement , cementitious , materials science , ultimate tensile strength , subgrade , toughness , brittleness , slab , base course , properties of concrete , geotechnical engineering , composite material , structural engineering , engineering , asphalt
In pavement engineering, concrete is the most widely used building material, but it has its own shortcomings such as low tensile and flexural strength, brittleness and poor durability, which easily lead to pavement damage. Common cement concrete repair materials have a long construction period, which affects traffic. Therefore, it is necessary to adopt fast repair materials to meet the requirements of traffic in a short time. The addition of fibers in pavement cement concrete can significantly improve the tensile and flexural strength and durability of concrete, and play a role in strengthening toughness. Compared with the single fiber concrete, which is relatively mature at present, this paper aims at strengthening and repairing the defects of waste concrete subgrade and base cracks, void at the bottom of pavement slab, etc. The fluidity and mechanical properties of recycled aggregate grouting material are studied through experiments, and on this basis, the mechanical properties of recycled concrete grouting are further analyzed. The results reveal the relationship between the amount of recycled fine aggregate, ambient temperature and the fluidity of recycled aggregate grouting, and the influence of the amount of recycled fine aggregate and the water-cement ratio on the mechanical properties of recycled aggregate grouting and grouting recycled concrete.