
2018NO.4
试验与应用
粉煤灰综合利用
FLYASHCOMPREHENSIVEUTILIZATION
不同配合比的心墙沥青混凝土物理力学性能分析 Analysis of Physical and Mechanical Properties of Core Wall Asphalt Concrete with Different Mix Proportion
白传贞,何建新2
(1.南水北调东线江苏水源有限责任公司,江苏南京210029; 2.新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052)
摘要:为适应坝高不断突破造成的坝体各部位受力和变形能力区别变大的趋势,分别研究了两种优选出的配合比各项物理力学性能,在材料相同的条件下,对配制的沥青混凝土试件进行了马歇尔、势裂抗拉、渗透、压缩、拉伸、静力三轴试验。结果表明:5号配合比抗压强度、抗拉强度、抗剪强度和水稳定系数较8号配合比分别高9.6%、8.9%、10%、 0.01%,适用于坝基等应力较大,变形较小的部位,8号配合比压应变、拉应变、弯应变较5号配合比分别高7.2%、21%、 10%,变形能力更强,力学性能略低,适用于坝体变形较大区域,表明在坝体不同区域选择不同的配合比是可行的。
关键词:沥青混凝土;物理力学性能;不同配合比
中图分类号:TV431*.5
文献标识码:A
文章编号:10058249(2018)04-0014-05
Bai Chuanzhen, He Jianxin
(1. Eastem Route for SouthtoNorth Water Transfer Projects Jiangsu Water Source Limited Liability Company, Nanjing, 210029 China;
2. School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University Urumqi 830052, China)
Abstract: To adapt to the trend that the difference between the stress and defomation capacity of the various parts of the dam body eaused by the continuous breakthrough of the dam height, the physical and mechanical properties of the two optimized mixture ratios were studied respectively. Under the same material conditions, Marshall, splitting tensile, osmosis, compression, tension, static triaxias test were carried out on the prepared bituminous concrete specimens. The results show that the mixture ratio of No, 5 is higher than the compressive strength, tensile strength, shear strength and water stability coefficient of 9.6 %, 8.9 %, 10% and 0.01%, respectively. It is suitable for the larger stress of the dam foundation and the smaller deformation area, and 8 is more than 7.2 %, 21 % and 10 %, respectively, with the compression strain, tensile strain and flexural strain of 5, respectively, 7.2%, 21% and 10%, It is suitable for the large deformation area of the dam, indicating that it is feasible to select different proportioning in different areas of the dam.
Keywords: Asphalt concrete; physical and mechanical properties; dfferent mixture ratio
随着新疆地区水资源开发的不断深入和坝工技术的发展,水利工程建设的难度也在不断增大[1-2]。沥青混凝土心墙坝因其具有适应复杂地质条件能力
*基金项目:新疆维吾尔自治区自然科学基金资助项目(2017D01A42)
作者简介:白传贞(1972~),男,学士,高级工程师,研究方向为水利水电工程设计与施工
通讯作者:何建新(1973~),男,硕士、副教授、硕导,研究方向为水利水电工程,Email:604690896@qq.com
收稿日期:2018-05-14· 14 ·
万方数据
强的特性被广泛应用于我国西北、东北等自然条件恶劣的地区【3]。沥青混凝土作为一种抗渗性能优良的胶凝材料,是由粗骨料、细骨料、填料和沥青胶浆按照一定比例配制而成的组成的空间网状结构体系(4],不仅具有优良的适应变形能力,还具有较强的自愈合能力和耐久性(5]。因此,这种复合材料被大量应用于水利工程防渗体的构建。在沥青混凝土心墙坝中,坝体会因为受到多种荷载而在水平和垂直方向形成应变,进而传递给沥青混凝土心墙(6),但随着沥青混凝土心墙坝在坝高方面的突破,心墙坝项和坝基之