自密实混凝土道面性能

马国靖; 蔡良才; 吴永根; 王硕太; 黄灿华; 苏敬斌; 戴年文; 于丰武

自密实混凝土道面性能

1.
空军工程大学工程学院, 陕西西安 710038
2.
中国航空港建设第十工程总队, 河北保定 071052

基金项目:

军队科研项目 KH0302014

详细信息

作者简介:
马国靖(1936-), 男, 江苏泰州人, 空军工程大学教授, 从事机场建筑工程研究

中图分类号: U416.216
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- 被引次数: 0
出版历程
- 收稿日期: 2007-04-18
- 刊出日期: 2007-10-25

Property of self-compacting concrete pavement

1.
School of Engineering, Air Force Engineering University, Xi'an 710038, Shaanxi, China
2.
The Tenth Engineering Group of Airport Construction of China, Baoding 071052, Hebei, China

More Information

Author Bio:
Ma Guo-jing(1936-), male, professor, + 86-29-84787705, dyunyu04@yahoocom.cn

摘要

摘要: 为了提高采用自密实混凝土铺筑的机场道面性能, 增加自密实混凝土粗骨料的用量, 使其体积百分比达到75%, 最大粒径为40mm, 以控制混凝土收缩小于400με; 用掺入最优掺量粉煤灰与高效减水剂的方法以及推导的自密实道面混凝土抗折强度公式获得所需的大流动性、高粘聚性、高抗折强度与高抗渗性的混凝土, 并进行了足尺板道面结构弯曲疲劳检验。检验结果表明: 混凝土28d抗折强度室内达到7.0~8.0MPa, 现场达到6.5MPa, Cl^-渗透试验电测法通过电量小于1000C;自密实混凝土道面的坍落度大于160mm, 疲劳寿命超过机场设计要求一倍; 并且使路面铺筑速度提高了1.5倍。可见此混凝土路面性能优越。
- 机场道面 /
- 自密实混凝土 /
- 粉煤灰 /
- 抗折强度 /
- 耐久性 /
- 疲劳寿命
Abstract: In order to improve the performance of self-compacting concrete pavement, the volume percentage of coarse aggregate in self-compacting concrete was increased to 75%, its largest granule diameter was 40 mm, so that the concrete shrinkage was less than 400με; the optimum amount of fly ash and super water reducing agent were added, and the flexural strength formula of sel-compacting pavement concrete was established to make its fluidity, cohesion, flexural strength and impermeability optimum, then, a full-scale slab flexural fatigue test was carried out. Test result shows that the flexural strength test value of self-compacting concrete is 7.0~8.0 MPa, its measure value is 6.5 MPa, and its charge passage is less than 1 000 C in the Cl^- penetrability test; the slump of self-compacting concrete pavement exceeds 160 mm, its fatigue service life increases by 1 time relative to design demand life, and its construction speed increases by 1.5 time. It is obvious that the property of self-compacting concrete pavement is ascendant. 5 tabs, 6 figs, 10 refs.
- airport pavement /
- self-compacting concrete /
- fly ash /
- flexural strength /
- durability /
- fatigue service life

HTML全文

图 1 普通混凝土SEM照片(× 1 000)

Figure 1. SEM micrograph of ordinary concrete(× 1 000)

下载: 全尺寸图片幻灯片

图 2 普通混凝土能谱分析

Figure 2. Energy spectrum analysis of ordinary concrete

下载: 全尺寸图片幻灯片

图 3 自密实混凝土SEM照片(× 3 000)

Figure 3. SEM micrograph of self-compacting concrete(× 3000)

下载: 全尺寸图片幻灯片

图 4 自密实混凝土能谱分析

Figure 4. Energy spectrum analysis of self-compacting concrete

下载: 全尺寸图片幻灯片

图 5 普通混凝土累计孔径分布

Figure 5. Cumulative pore-size distribution of ordinary concrete

下载: 全尺寸图片幻灯片

图 6 自密实混凝土累计孔径分布

Figure 6. Cumulative pore-size distribution of self-compacting concrete

下载: 全尺寸图片幻灯片

表 1 自密实混凝土配合比、流动性及强度

Table 1. Mixture ratio, fluidity and strength of self-compacting concrete

表 2 抗折强度与水灰比关系试验数据

Table 2. Test data of flexural strength-W/C

表 3 弯曲疲劳试验结果

Table 3. Bending fatigue test result

表 4 自密实混凝土小梁疲劳试验结果

Table 4. Beam fatigue test result of self-compacting concrete

表 5 干硬性混凝土小梁疲劳试验结果

Table 5. Beam fatigue test result of hard drying concrete

参考文献(10)

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