水泥稳定凝灰岩机制砂级配碎石路用性能
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摘要
为推广凝灰岩在道路工程中的应用,采用凝灰岩机制砂替代细集料,设计混合料级配,通过击实实验确定水泥稳定碎石最佳含水量和最大干密度,并制备试件,测试混合料无侧限抗压强度、劈裂强度、水稳性及抗冻性等路用性能。结果表明:3%和5%水泥用量的水泥稳定凝灰岩机制砂级配碎石可分别满足底基层和基层的强度要求;在较短龄期内,水泥稳定凝灰岩机制砂级配碎石无侧限抗压强度比水泥稳定天然集料的略高,劈裂强度相差不大,水稳系数接近;水泥用量对无侧限抗压强度影响显著。由此说明水泥稳定凝灰岩机制砂级配碎石总体性能满足道路基层使用要求。
In order to promote the application of tuff mines in road engineering,the performance of cement-stabilized mixture of tuff sands by mechanical extraction and graded macadam was investigated. The unconfined compressive strength( UCS),cleavage strength,water stability and frost resistance of the mixture were tested and compared with those of fine aggregates. The optimum water content and maximum dry density of cement-stabilized macadam with tuff sands were determined by compaction experiments. Results showed that the 3% and 5 % cement stabilized tuff sands mixed with graded macadam could meet the strength requirements of the sub-base and the base course,respectively. The UCS of tuff sands mixture was slightly higher than that of the cement-stabilized natural aggregate in a short period. The cleavage strength had insignificant difference between those of tuff sands mixture and fine aggregates mixture,while the cement usage had significant effects on it. The coefficient of water stability of cement-stabilized tuff sands mixture was very close to that of the cement-stabilized natural aggregates. Therefore,the tuff sands mixture was feasible for application in road base engineering basically.
In order to promote the application of tuff mines in road engineering,the performance of cement-stabilized mixture of tuff sands by mechanical extraction and graded macadam was investigated. The unconfined compressive strength( UCS),cleavage strength,water stability and frost resistance of the mixture were tested and compared with those of fine aggregates. The optimum water content and maximum dry density of cement-stabilized macadam with tuff sands were determined by compaction experiments. Results showed that the 3% and 5 % cement stabilized tuff sands mixed with graded macadam could meet the strength requirements of the sub-base and the base course,respectively. The UCS of tuff sands mixture was slightly higher than that of the cement-stabilized natural aggregate in a short period. The cleavage strength had insignificant difference between those of tuff sands mixture and fine aggregates mixture,while the cement usage had significant effects on it. The coefficient of water stability of cement-stabilized tuff sands mixture was very close to that of the cement-stabilized natural aggregates. Therefore,the tuff sands mixture was feasible for application in road base engineering basically.
引文
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[13]王雪莲,黄晓明,卞国剑. LSPM对防治半刚性基层沥青路面反射裂缝机理分析[J].公路交通科技,2016,33(7):12-18.WANG X L,HUANG X M,BIAN G J. Analysis on mechanism ofusing LSPM for preventing reflective cracks in asphalt prevent withsemi-rigid base[J]. 2016,33(7):12-18.
[14] LI Z L,GONG N F,LUAN X B. Development mechanism analy-sis of temperature shrinkage type reflective crack in asphalt pave-ment on semi-rigid base[J]. Journal of Highway and Transporta-tion Research and Development,2008,1(25):142.
[15]吴瑞麟,张良陈,韩卓,等.水泥稳定碎石基层长期浸水及冻融试验研究[J].华中科技大学学报:自然科学版,2011,39(10):113-115.WU R L,ZHANG L C,HAN Z,et al. Long-term water immer-sion and freeze-thaw cycles experiment of cement-stabilizedmacadam bases[J]. Journal of Huazhong University(Natural Sci-ence Edition),2011,39(10):113-115.
[16]宋云连,刘雁军,林敏.路用早强水泥稳定碎石材料抗冻性能试验研究[J].公路,2015,34(6):193-198.SONG Y L,LIU Y J,LIN M. Experiment study of early strengthcement stabilized macadam material for improving frost resistance[J]. Highway,2015,34(6):193-198.
[17] JTG/T F20-2015,公路路面基层施工技术规范[S].北京:人民交通出版社,2015.JTG/T F20-2015. Technical specifications for construction ofhighway road-bases[S]. Beijing:China Communications Press,2015.
[18] 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.JTG E51-2009. Material test methods of materials stabilized withinorganic highway engineering[S]. Beijing:China Communica-tions Press.
[2] ANTIOHOS S K,PAPAGEORGIOU A,TSIMAS S. Activation offly ash cementitious systems in the presence of quicklime. part II:nature of hydration products,porosity and microstructure develop-ment[J]. Cement and Concrete Research,2006,36(12):2123-2131.
[3] CHERRAK M,BALI A,SILHADI K. Concrete mix design contai-ning calcareous tuffs as a partial sand substitution[J]. Constructionand Building Materials,2013,47(5):318-323.
[4] LIGUORI B,IUCOLANO F,GENNARO B D,et al. Zeolitized tuffin environmental friendly production of cementitious material:chemical and mechanical characterization[J]. Construction andBuilding Materials,2015,99(1):272-278.
[5]李响,石妍,李家正,等.含凝灰岩粉复合胶凝材料抗压强度发展规律[J].建筑材料学报,2017,20(3):435-438.LI X,SHI Y,LI J Z,et al. Compressive strength development ofcomplex binder containing tuff powder[J]. Journal of Building Ma-terials,2017,20(3):435-438.
[6]何仕碧,陈太红,安辛友,等.凝灰岩制备水泥混合材的试验研究[J].硅酸盐通报,2018(5):1572-1577.HE S B,CHEN T H,AN X Y,et al. Experimental study on pre-paring cement admixture from volcanic tuff[J]. Bulletin of the Chi-nese Ceramic Society,2018(5):1572-1577.
[7]温小栋,蔡煜梁,赵莉,等.凝灰岩机制砂混凝土抗低温硫酸盐侵蚀性[J].浙江大学学报:工学版,2017,51(3):532-537.WEN X D,CAI Y L,ZHAO L,et al. Sulfate resistance of concreteby machine-made tuff sand at low temperature[J]. Journal ofZhejiang University(Engineering Science),2017,51(3):532-537.
[8]沙爱民,胡力群.半刚性基层材料的结构特征[J].中国公路学报,2008,21(4):1-5.SHA A M,HU L Q. Material characteristics of semi-rigid base[J]. China Journal of Highway and Transport,2008,21(4):1-5.
[9]沙爱民,贾侃,李小刚.半刚性基层材料的疲劳特性[J].交通运输工程学报,2009,9(3):29-33.SHA A M,JIA K,LI X G. Study on the fatigue performance ofsemi-rigid base course materials[J]. Journal of Transportation En-gineering,2009,9(3):29-33.
[10]周卫峰,赵可,王德群,等.水泥稳定碎石混合料配合比的优化[J].长安大学学报(自然科学版),2006,26(1):24-28.ZHOU W F,ZHAO K,WANG D Q,et al. Mix ratio optimizationdesign of cement stabilized macadam based on static pressuremethod and vibration method[J]. Journal of Chang’an University(Natural Science Edition),2006,26(1):24-28.
[11]闫亚鹏.寒冷地区水泥稳定碎石基层抗裂性改善技术研究[D].西安:长安大学,2012.YAN Y P. Study on the technology in improving crack resistanceof cement-stabilized crushed-stone base in cold region[D].Xi’an:Chang’an University,2012.
[12] HU L Q,SHA A M. Research on performance of cement stabilizedskeleton-dense structure aggregate base course material[J]. Ad-vanced Materials Research,2011,194-196:1089-1094.
[13]王雪莲,黄晓明,卞国剑. LSPM对防治半刚性基层沥青路面反射裂缝机理分析[J].公路交通科技,2016,33(7):12-18.WANG X L,HUANG X M,BIAN G J. Analysis on mechanism ofusing LSPM for preventing reflective cracks in asphalt prevent withsemi-rigid base[J]. 2016,33(7):12-18.
[14] LI Z L,GONG N F,LUAN X B. Development mechanism analy-sis of temperature shrinkage type reflective crack in asphalt pave-ment on semi-rigid base[J]. Journal of Highway and Transporta-tion Research and Development,2008,1(25):142.
[15]吴瑞麟,张良陈,韩卓,等.水泥稳定碎石基层长期浸水及冻融试验研究[J].华中科技大学学报:自然科学版,2011,39(10):113-115.WU R L,ZHANG L C,HAN Z,et al. Long-term water immer-sion and freeze-thaw cycles experiment of cement-stabilizedmacadam bases[J]. Journal of Huazhong University(Natural Sci-ence Edition),2011,39(10):113-115.
[16]宋云连,刘雁军,林敏.路用早强水泥稳定碎石材料抗冻性能试验研究[J].公路,2015,34(6):193-198.SONG Y L,LIU Y J,LIN M. Experiment study of early strengthcement stabilized macadam material for improving frost resistance[J]. Highway,2015,34(6):193-198.
[17] JTG/T F20-2015,公路路面基层施工技术规范[S].北京:人民交通出版社,2015.JTG/T F20-2015. Technical specifications for construction ofhighway road-bases[S]. Beijing:China Communications Press,2015.
[18] 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.JTG E51-2009. Material test methods of materials stabilized withinorganic highway engineering[S]. Beijing:China Communica-tions Press.
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