低剂量水泥改性级配碎石抗剪强度分析
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摘要
为了促进低剂量水泥改性级配碎石在工程中的推广应用,通过无侧限抗压强度和劈裂强度试验,确定了低剂量水泥改性级配碎石的抗剪强度指标,对比分析了级配、龄期、水泥剂量、压实度及含水量对抗剪强度的影响。研究结果表明:级配对强度的影响显著,嵌挤骨架密实型混合料强度最高,粗集料过多不利于粘聚力,细集料过多不利于内摩阻角。粘聚力随着龄期、水泥剂量及压实度的增加而增加。随着含水量的增加,粘聚力呈现出驼峰变化规律,在最佳含水量附近达到峰值。随着龄期、水泥剂量、压实度及含水量的增加,内摩阻力呈现一种驼峰变化规律,在2%水泥剂量和最佳含水量条件下达到峰值。SAC级配设计方法可用于高强度的低剂量水泥改性级配碎石设计。
In order to promote the popularization and application of low-dose cement-modified graded crushed rock in engineering, the effects of the graduation, the age, cement dosage, the degree of compaction and water content on shear strength are compared and analyzed by using unconfined compressive strength and splitting strength test which can determine the shear strength index of the low-dose cement-modified graded crushed rock. The results show that the gradation has remarkable effect on strength and built-in skeleton-density gradation has the highest strength. However, the excessive coarse aggregate is not conducive to cohesion and the excessive fine one is not instructive to the angle of internal friction. The cohesion increases with the increase of the age, cement dosage and the degree of compaction. With the increase of water content, there appears the variation like hump, and it reaches the peak near the optimal water content. The angle of internal friction increases with the increase of the age, cement dosage, the degree of compaction, and water content, there is the regular of hump, the cement dosage is 2% and optimal water content appears at the peak. The methods of SAC gradation design can be used for the gradation design of high strength low-dose cement-modified graded crushed rock.
In order to promote the popularization and application of low-dose cement-modified graded crushed rock in engineering, the effects of the graduation, the age, cement dosage, the degree of compaction and water content on shear strength are compared and analyzed by using unconfined compressive strength and splitting strength test which can determine the shear strength index of the low-dose cement-modified graded crushed rock. The results show that the gradation has remarkable effect on strength and built-in skeleton-density gradation has the highest strength. However, the excessive coarse aggregate is not conducive to cohesion and the excessive fine one is not instructive to the angle of internal friction. The cohesion increases with the increase of the age, cement dosage and the degree of compaction. With the increase of water content, there appears the variation like hump, and it reaches the peak near the optimal water content. The angle of internal friction increases with the increase of the age, cement dosage, the degree of compaction, and water content, there is the regular of hump, the cement dosage is 2% and optimal water content appears at the peak. The methods of SAC gradation design can be used for the gradation design of high strength low-dose cement-modified graded crushed rock.
引文
[1]郑健龙,周志刚,张起森.沥青路面抗裂设计理论与方法[M].北京:人民交通出版社,2002.(ZHEN Jian-long,ZHOU Zhi-gang,ZHANG Qi-sen.The cracking resistance design theory and methods of asphalt pavement[M].Beijing:China Communications Press,2002.(in Chinese))
[2]王龙,解晓光,栾海.级配碎石混合料及其基层的抗剪性能[J].哈尔滨工业大学学报,2008,40(8):1265-1268.(WANG Long,XIE Xiao-guang,LUAN Hai.Shear characteristics of graded aggregate materials and graded aggregate base[J].Journal of Harbin Institute of Technology,2008,40(8):1265-1268.(in Chinese))
[3]何成勇.云南高海拔地区级配碎石基层材料组成及性能研究[D].重庆:重庆交通大学,2008.(HE Cheng-yong.Research on graded gravel basic material composition and performance in high-altitude region of Yunnan[D].Chongqing:Chongqing Jiaotong University,2008.(in Chinese))
[4]杨尧,罗强,陈占.客运专线级配碎石抗剪强度试验研究[J].路基工程,2010(4):75-78.(YANG Yao,LUO Qiang,CHEN Zhan.Experimental study on shear strength of graded gravel for passenger dedicated line[J].Subgrade Engineering,2010(4):75-78.(in Chinese))
[5]李.基于振动法的级配碎石设计标准与设计方法研究[D].西安:长安大学,2010.(LI Di.Research on graded broken stone design standard and design method based on vibrating compaction[D].Xi’an:Chang’an University,2010.(in Chinese))
[6]石桂梅.复合式基层沥青路面级配碎石上基层的抗剪性能[J].建筑材料学报,2011,14(4):502-506,559.(SHIGui-mei.Shear properties of the graded gravel upper base in composite asphalt pavement[J].Journal of Building Materials,2010,14(4):502-506,559.(in Chinese))
[7]马骁尧,高启聚,石鹏程,等.基于摩尔-库伦准则级配碎石强度研究[J].公路,2017,61(5):209-215.(MA Xiao-yao,GAO Qi-ju,SHI Peng-cheng,et al.Study on the strength of the graded gravel based on Mohr-Coulomb criterion[J].Highway,2017,61(5):209-215.(in Chinese))
[8]周卫峰,李彦伟,苗乾,等.纤维级配碎石性能研究[J].建筑材料学报,2015,18(6):1050-1054.(ZHOU Wei-feng,LIYan-wei,MIAO Qian,et al.Study on technical performance of fiber graded crushed rock[J].Journal of Building Materials,2015,18(6):1050-1054.(in Chinese))
[9]熊鹰.水泥掺量对碎石基层路用性能影响的研究[D].长沙:长沙理工大学,2007.(XIONG Ying.The research on the dffect of doses of cement on the pavement performance of macadam base[D].Changsha:Changsha University of Science&Technology,2007.(in Chinese))
[10]周志刚,曾勇,孙绪康.沥青路面水泥改性级配碎石力学性能研究[J].交通科学与工程,2012,28(3):8-12.(ZHOUZhi-gang,ZENG Yong,SUN Xu-kang.The mechanical performance of cement modified graded crushed rock applied in the basement of asphalt pavement[J].Journal of Transport Science and Engineering,2012,28(3):8-12.(in Chinese))
[11]孙绪康.低剂量水泥改性级配碎石力学行为研究[D].长沙:长沙理工大学,2012.(SUN Xu-kang.Research on the mechanical behavior of cement modified graded crushed rock[D].Changsha:Changsha University of Science&Technology,2012.(in Chinese))
[12]周军霞.低水泥含量级配碎石路用性能试验研究[J].硅酸盐通报,2016,35(12):4292-4296.(ZHOU Jun-xia.Experimental study on road performance of low-cement graded crushed stone[J].Bulletin of the Chinese Ceramic Society,2016,35(12):4292-4296.(in Chinese))
[13]于保阳,王宇,张丽萍.低剂量水泥稳定碎石混合料收缩性能试验[J].辽宁工程技术大学学报:自然科学版,2016,35(3):283-288.(YU Bao-yang,WANG Yu,ZHANG Liping.Low doses of cement stabilized macadam road base-shrinkage performance research[J].Journal of Liaoning Technical University:Natural Sciences,2016,35(3):283-288.(in Chinese))
[14]中交公路规划设计院.JTG D50-2006,公路沥青路面设计规范[S].北京:人民交通出版社,2006.(China Highway Planning and Design Institute of Consultants.JTG D50-2006,Specifications for design of highway asphalt pavement[S].Beijing:China Communications Press,2006.(in Chinese))
[15]沙庆林.SAC和其他粗集料断级配的矿料级配设计方法[J].公路,2005(1):143-150.(SHA Qing-lin.Design method of SAC and other coarse aggregate gap grade[J].Highway,2005(1):143-150.(in Chinese))
[16]张肖宁,王绍怀,吴旷怀,等.沥青混合料组成设计的CAVF法[J].公路,2001(12):17-21.(ZHANG Xiao-ning,WANG Shao-huai,WU Kuang-huai,et al.The design method of CAVF of the composition of the asphalt mixture[J].Highway,2001(12):17-21.(in Chinese))
[17]交通部公路科学研究所.JTG E51-2009,公路工程无机结合料稳定材料试验规程[S].北京:人民交通出版社,2009.(Research Institute of Highway Ministry of Communications.JTG E51-2009,Test methods of materials stabilized with inorganic binders for highway engineering[S].Beijing:China Communications Press,2009.(in Chinese))
[2]王龙,解晓光,栾海.级配碎石混合料及其基层的抗剪性能[J].哈尔滨工业大学学报,2008,40(8):1265-1268.(WANG Long,XIE Xiao-guang,LUAN Hai.Shear characteristics of graded aggregate materials and graded aggregate base[J].Journal of Harbin Institute of Technology,2008,40(8):1265-1268.(in Chinese))
[3]何成勇.云南高海拔地区级配碎石基层材料组成及性能研究[D].重庆:重庆交通大学,2008.(HE Cheng-yong.Research on graded gravel basic material composition and performance in high-altitude region of Yunnan[D].Chongqing:Chongqing Jiaotong University,2008.(in Chinese))
[4]杨尧,罗强,陈占.客运专线级配碎石抗剪强度试验研究[J].路基工程,2010(4):75-78.(YANG Yao,LUO Qiang,CHEN Zhan.Experimental study on shear strength of graded gravel for passenger dedicated line[J].Subgrade Engineering,2010(4):75-78.(in Chinese))
[5]李.基于振动法的级配碎石设计标准与设计方法研究[D].西安:长安大学,2010.(LI Di.Research on graded broken stone design standard and design method based on vibrating compaction[D].Xi’an:Chang’an University,2010.(in Chinese))
[6]石桂梅.复合式基层沥青路面级配碎石上基层的抗剪性能[J].建筑材料学报,2011,14(4):502-506,559.(SHIGui-mei.Shear properties of the graded gravel upper base in composite asphalt pavement[J].Journal of Building Materials,2010,14(4):502-506,559.(in Chinese))
[7]马骁尧,高启聚,石鹏程,等.基于摩尔-库伦准则级配碎石强度研究[J].公路,2017,61(5):209-215.(MA Xiao-yao,GAO Qi-ju,SHI Peng-cheng,et al.Study on the strength of the graded gravel based on Mohr-Coulomb criterion[J].Highway,2017,61(5):209-215.(in Chinese))
[8]周卫峰,李彦伟,苗乾,等.纤维级配碎石性能研究[J].建筑材料学报,2015,18(6):1050-1054.(ZHOU Wei-feng,LIYan-wei,MIAO Qian,et al.Study on technical performance of fiber graded crushed rock[J].Journal of Building Materials,2015,18(6):1050-1054.(in Chinese))
[9]熊鹰.水泥掺量对碎石基层路用性能影响的研究[D].长沙:长沙理工大学,2007.(XIONG Ying.The research on the dffect of doses of cement on the pavement performance of macadam base[D].Changsha:Changsha University of Science&Technology,2007.(in Chinese))
[10]周志刚,曾勇,孙绪康.沥青路面水泥改性级配碎石力学性能研究[J].交通科学与工程,2012,28(3):8-12.(ZHOUZhi-gang,ZENG Yong,SUN Xu-kang.The mechanical performance of cement modified graded crushed rock applied in the basement of asphalt pavement[J].Journal of Transport Science and Engineering,2012,28(3):8-12.(in Chinese))
[11]孙绪康.低剂量水泥改性级配碎石力学行为研究[D].长沙:长沙理工大学,2012.(SUN Xu-kang.Research on the mechanical behavior of cement modified graded crushed rock[D].Changsha:Changsha University of Science&Technology,2012.(in Chinese))
[12]周军霞.低水泥含量级配碎石路用性能试验研究[J].硅酸盐通报,2016,35(12):4292-4296.(ZHOU Jun-xia.Experimental study on road performance of low-cement graded crushed stone[J].Bulletin of the Chinese Ceramic Society,2016,35(12):4292-4296.(in Chinese))
[13]于保阳,王宇,张丽萍.低剂量水泥稳定碎石混合料收缩性能试验[J].辽宁工程技术大学学报:自然科学版,2016,35(3):283-288.(YU Bao-yang,WANG Yu,ZHANG Liping.Low doses of cement stabilized macadam road base-shrinkage performance research[J].Journal of Liaoning Technical University:Natural Sciences,2016,35(3):283-288.(in Chinese))
[14]中交公路规划设计院.JTG D50-2006,公路沥青路面设计规范[S].北京:人民交通出版社,2006.(China Highway Planning and Design Institute of Consultants.JTG D50-2006,Specifications for design of highway asphalt pavement[S].Beijing:China Communications Press,2006.(in Chinese))
[15]沙庆林.SAC和其他粗集料断级配的矿料级配设计方法[J].公路,2005(1):143-150.(SHA Qing-lin.Design method of SAC and other coarse aggregate gap grade[J].Highway,2005(1):143-150.(in Chinese))
[16]张肖宁,王绍怀,吴旷怀,等.沥青混合料组成设计的CAVF法[J].公路,2001(12):17-21.(ZHANG Xiao-ning,WANG Shao-huai,WU Kuang-huai,et al.The design method of CAVF of the composition of the asphalt mixture[J].Highway,2001(12):17-21.(in Chinese))
[17]交通部公路科学研究所.JTG E51-2009,公路工程无机结合料稳定材料试验规程[S].北京:人民交通出版社,2009.(Research Institute of Highway Ministry of Communications.JTG E51-2009,Test methods of materials stabilized with inorganic binders for highway engineering[S].Beijing:China Communications Press,2009.(in Chinese))