摘要
依托合肥—徐州高速公路路面工程,现场检测集料级配指标,研究了集料级配检测数据的变异性水平及规律性,发现沥青面层用集料单级配及合成级配数据呈正态分布,可以采用平均值与均方差2个指标来判断集料级配指标,平均值与目标配合比的设计值比较,均方差利用正态分布判别变异性的符合性。结果表明:对于集料级配质量控制,筛孔通过率指标除变化值的偏差要求外,还应该控制其变异性;集料级配关键筛孔4.75 mm和2.36 mm的均方差应分别小于1.0和0.7。
This paper studied variability level and statistical law of aggregate gradation data, based on the detection of on-site aggregate gradation index of Hefei-Xuzhou expressway pavement project. It is indicated that the aggregate gradation data show the normal distribution. The determining of the quality of aggregate gradation can use two indices, the average and standard deviation. The average value is compared with the designed value of target mixture rate, the standard deviation uses normal distribution to determine the variability level. The results show that： to the quality control of aggregate gradation, it is necessary to control the variability of sieve mutative value through rate; the standard deviation of aggregate gradation on key sieves with 4.75 mm and 2.36 mm should be less than 1.0 and 0.7 respectively. 9 tabs, 2 figs, 11 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第5期12-16,40,共6页
Journal of Chang’an University(Natural Science Edition)
基金
国家西部交通建设科技项目(200331822334)
关键词
道路工程
沥青面层
集料
级配
统计分布
技术指标
质量控制
road engineering
asphalt pavement
aggregate
gradation
statistical distribution
technology index
quality control
作者简介
扈惠敏（1971-），女，河北枣强人，高级工程师，工学博士，E-mail：hhm1971@126．com。
