Mix proportion design method with multiple indexes for continuously reinforced concrete
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摘要: 采用MEPDG软件分析了连续配筋混凝土路面路用性能对于混凝土抗压强度、干缩应变、温缩系数等参数的敏感性。通过室内试验研究了水泥用量、水灰比等混凝土配合比组成参数对路面设计参数的影响。根据均衡设计的理论, 建立了连续配筋混凝土多指标配合比设计方法, 推荐了各配合比组成参数的范围, 并建立了水灰比与混凝土干缩应变、温缩系数间的回归方程及弯拉强度与抗压强度间的关系式。分析结果表明:连续配筋混凝土配合比设计的控制指标宜包括抗压强度、干缩应变和温缩系数, 水泥浆含量宜小于22%, 最大公称粒径宜为19.0~26.5mm。根据多指标的配合比设计方法得到的混凝土能更好地满足连续配筋混凝土路面的性能要求。Abstract: The sensibilities of continuously reinforced concrete pavement (CRCP) performances on concrete parameters such as compressive strength, drying shrinkage strain and temperature shrinkage coefficient were analyzed by using MEPDG software. The influences of mix proportion parameters of cement content, water-cement ratio etc on pavement design parameters were studied through laboratory tests. According to balanced design theory, the mix proportion design method with multiple indexes for continuously reinforced concrete was set up. The appropriate scopes of mix proportion parameters were recommended, the regression formulae of water-cement ratio with drying shrinkage strain and temperature shrinkage coefficient were established, and the formula of flexural-tensile strength and compressive strength was also established. Analysis result indicates that compressive strength, drying shrinkage strain and temperature shrinkage coefficient are fitted to be control indices of mix proportion design method for continuously reinforced concrete. The mass content of cement slurry should be less than 22%. Nominal maximum aggregate size should be 19.0-26.5 mm. It is shown that the concrete designed according to the mix proportion design method with multiple indexes can better satisfy the performance requirement of CRCP.
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表 2 水泥用量、水灰比对混凝土路用性能的影响
Table 2. Influences of cement content and water-cement ratio on concrete performance
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表 3 用水量、水灰比对混凝土路用性能的影响
Table 3. Influences of water content and water-cement ratio on concrete performance
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表 4 水泥用量、用水量、水灰比推荐范围
Table 4. Recommended scopes of cement content, water content and water-cement ratio
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表 9 粗集料最大粒径对混凝土路用性能的影响
Table 9. Influence of maximum diameter of coarse aggregate on concrete performance
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[1] ZOLLINGER D G, BUCH N, XIN D P, et al. Performance of continuously reinforced concrete pavements, volume VI—CRC pavement design, construction, and performance[R]. McLean: Federal Highway Administration, 1999. [2] SELEZNEVA O I, DARTER M I, ZOLLINGER D G, et al. Characterization of transverse cracking spatial variability using LTPP data for CRCP design[J]. Transportation Research Record, 2003 (1849): 147-155. [3] Transportation Research Board. Guide for mechanistic-empirical design of new and rehabilitated pavement structures[R]. Washington DC: Transportation Research Board, 2004. [4] SUH Y C, HANKINS K, MCCULLOUGH B F. Early-age behavior of continuously reinforced concrete pavement and calibration of the failure prediction model in the CRCP-7Program[R]. Austin: University of Texas at Austin, 1992. [5] JIMENEZ M A, MCCULLOUGH B F, HANKINS K. Monitoring of siliceous river gravel and limestone continuously reinforced concrete pavement test sections in Houston 2years after placement, and development of a crack width model for the CRCP-7program[R]. Austin: University of Texas at Austin, 1992. [6] CHO Y H, DOSSEY T, MCCULLOUGH B F. Early age performance of continuously reinforced concrete pavement with different types of aggregate[J]. Transportation Research Record, 1997 (1568): 35-43. [7] JOHNSTON D P, SURDAHL R W. Influence of mixture design and environmental factors on continuously reinforced concrete pavement cracking[J]. Transportation Research Record, 2007 (2020): 83-88. [8] JOHNSTON D P, SURDAHL R W. Effects of base type on modeling long-term pavement performance of continuously reinforced concrete sections[J]. Transportation Research Record, 2006 (1979): 93-101. [9] Federal Highway Administration. Evaluating the use of fiberreinforced polymer bars in continuously reinforced concrete pavement[R]. McLean: Federal Highway Administration, 2009. [10] 王衍辉. 连续配筋混凝土路面横向裂缝分布预估研究[D]. 西安: 长安大学 , 2010.WANG Yan-hui. Study on predicting transverse cracks distribution of continuously reinforced concrete pavement[D]. Xi'an: Chang'an University, 2010. (in Chinese). [11] 左志武, 张洪亮, 陈江. 连续配筋混凝土路面性能参数影响的试验[J]. 长安大学学报: 自然科学版, 2010, 30 (1): 23-29. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201001007.htmZUO Zhi-wu, ZHANG Hong-liang, CHEN Jiang. Test of effects of parameters on continuously reinforced concrete pavement (CRCP) performance[J]. Journal of Chang'an University: Natural Science Edition, 2010, 30 (1): 23-29. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL201001007.htm [12] 查旭东. 连续配筋混凝土路面横向开裂发展规律[J]. 交通运输工程学报, 2008, 8 (2): 65-68. http://transport.chd.edu.cn/article/id/200802014ZHA Xu-dong. Development laws of transverse cracking for continuously reinforced concrete pavement[J]. Journal of Traffic and Transportation Engineering, 2008, 8 (2): 65-68. (in Chinese). http://transport.chd.edu.cn/article/id/200802014 [13] 查旭东. 连续配筋混凝土路面横向开裂的敏感性分析[J]. 铁道科学与工程学报, 2008, 5 (2): 64-70. https://www.cnki.com.cn/Article/CJFDTOTAL-CSTD200802014.htmZHA Xu-dong. Sensitivity analysis of transverse cracking for continuously reinforced concrete pavement[J]. Journal of Railway Science and Engineering, 2008, 5 (2): 64-70. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CSTD200802014.htm [14] 王衍辉, 徐士翠. 连续配筋混凝土路面收缩应力及参数敏感性分析[J]. 中外公路, 2012, 32 (3): 90-95. https://www.cnki.com.cn/Article/CJFDTOTAL-GWGL201203021.htmWANG Yan-hui, XU Shi-cui. Analysis of shrinkage stress and parameter sensitivity for continuously reinforced concrete pavement[J]. Journal of China and Foreign Highway, 2012, 32 (3): 90-95. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GWGL201203021.htm [15] 陈江. 连续配筋混凝土配合比设计方法及施工技术研究[D]. 西安: 长安大学, 2010.CHEN Jiang. Research on construction technique and mix design method of continuously reinforced concrete[D]. Xi'an: Chang'an University, 2010. (in Chinese). [16] JTG F30—2003, 公路水泥混凝土路面施工技术规范[S].JTG F30—2003, technical specification for construction of highway cement concrete pavements[S]. (in Chinese). [17] 赵亚兰, 陈拴发. 连续配筋混凝土基层沥青路面层间剪应力分析[J]. 筑路机械与施工机械化, 2010, 27 (4): 45-48. https://www.cnki.com.cn/Article/CJFDTOTAL-ZLJX201004035.htmZHAO Ya-lan, CHEN Shuan-fa. Analysis of interlayer shear stress for continuously reinforced concrete base asphalt pavement[J]. Road Machinery and Construction Mechanization, 2010, 27 (4): 45-48. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZLJX201004035.htm [18] 高莉春, 谭利华. 高性能混凝土拌和用水温度控制[J]. 筑路机械与施工机械化, 2012, 29 (9): 47-49. https://www.cnki.com.cn/Article/CJFDTOTAL-ZLJX201209029.htmGAO Li-chun, TAN Li-hua. Temperature control of mixing water for high performance concrete[J]. Road Machinery and Construction Mechanization, 2012, 29 (9): 47-49. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZLJX201209029.htm -
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