骨料形态对透水混凝土骨架特性及使用性能的影响
Effect of Aggregate Shape on Permeable Concrete Skeleton and Properties
周国涛 1张成明 1单景松 2张化强 1尉帅帅 1任凯凯3
作者信息
- 1. 山东省公路桥梁建设集团有限公司,山东济南 250061
- 2. 山东科技大学,山东青岛 266590
- 3. 中建八局科技建设有限公司,上海 201306
- 折叠
摘要
透水混凝土是一种骨架空隙结构,由粗骨料形成骨架,骨料间靠水泥浆等材料黏结,因而骨料形态对透水混凝土骨架特性及使用性能有重要影响.选取不同形态的骨料颗粒,分析骨料形态对透水混凝土骨架特性、空隙率、渗透性能和力学性能的影响.研究结果表明:加入适量棱角丰富型细骨料可降低骨料间隙率、显著增加骨料骨架嵌锁能力;细骨料使透水混凝土的有效空隙率和渗水能力均降低,而针片状9.5～13.2 mm粗骨料能明显增加试件的空隙率与透水能力;适量棱角丰富型细骨料可显著提升透水混凝土抗压强度,而针片状细集料和粗集料导致抗压强度降低.
Abstract
Permeable concrete is a kind of skeleton void structure,the interior of which is formed by coarse aggregate skeleton,and the aggregate is bonded by cement slurry and other materials,so the aggregate form has an important impact on the characteristics and performance of the skeleton of permeable concrete.In this paper,different forms of aggregate particles were selected to analyze the effects of aggregate morphology on the characteristics,porosity,permeability and mechanical properties of permeable concrete.The results show that the addition of an appropriate amount of fine aggregate with rich edges and angles can reduce the aggregate gap rate and significantly increase the locking capacity of the aggregate skeleton.The effective porosity and water permeability of permeable concrete are reduced by fine aggregate,while needle-like 9.5～13.2 mm coarse aggregate can significantly increase the porosity and water permeability of the specimen;an appropriate amount of fine aggregate with rich angularity can significantly improve the compressive strength of permeable concrete,while needle-like fine aggregate and coarse aggregate reduce the compressive strength.
关键词
透水混凝土/骨料形态/骨架嵌锁力/棱角丰富型骨料Key words
permeable concrete/aggregate shape/skeleton locking force/angular rich aggregate引用本文复制引用
基金项目
山东省自然科学基金(ZR2021ME004)
出版年
2024
NETL
NSTL
万方数据