煤矸石是我国目前排放量最大的工业固体废弃物之一，以粉体煤矸石为填料对沥青进行改性在国内外鲜有研究涉及。采用锥入度实验、动态剪切流变实验(DSR)和弯曲梁流变实验(BBR)，研究了不同粉胶比条件下活化煤矸石改性沥青胶浆的剪切强度及高、低温流变性能变化规律，并与矿粉改性沥青胶浆进行对比；在此基础上，初探了活化煤矸石改性沥青胶浆作用机理。结果表明，采用活化煤矸石替代矿粉后，沥青胶浆的抗剪强度和高温性能大幅提高，低温性能则基本相当。研究成果为活化煤矸石替代矿粉作为沥青混合料填料的可行性提供了依据。
The coal gangue is one of the greatest industrial solid waste emissions in our country at present,but few researches concentrate on using coal gangue as the filler to enhance the properties of asphalt both at home and abroad.Cone penetration test,dynamic shear rheological test (DSR)and bending beam rheological test (BBR)were adopted to investigate the high and low temperature rheological properties of the activated coal gangue-modified asphalt mortar under the condition of different filler-bitumen ratios,compared with mineral powder modified asphalt mortar. Based on that,the modification mechanism of coal gangue upon asphalt mortar was explored.The results showed that the substitution of activated coal gangue for mineral powder could make the shear strength and high temperature per-formance of asphalt mortar increase sharply,while the low temperature performance remained almost the same.The research results can provide a basis for the feasibility of substituting activated coal gangue mineral powder for common mineral powder as filling powder in asphalt mixture.
参考文献
| [1] | 陈志国 .火山灰沥青胶浆路用性能的研究[D].哈尔滨工业大学,2010. |
| [2] | 贺建清,靳明,阳军生.掺土煤矸石的路用工程力学特性及其填筑技术研究[J].土木工程学报,2008(05):87-93. |
| [3] | 杜焕铜,师文虎,石磊,邓启蒙,李飞.高硫煤矸石综合利用探讨[J].煤炭加工与综合利用,2014(11):67-69. |
| [4] | 胡长明,刘洪亮,王丽芳.太原地区煤矸石作为建筑回填材料的试验研究[J].安全与环境学报,2012(01):98-101. |
| [5] | 李琦,孙根年,韩亚芬,陈素景.我国煤矸石资源化再生利用途径的分析[J].煤炭转化,2007(01):78-82. |
| [6] | 曹建军,刘永娟,郭广礼.煤矸石的综合利用现状[J].环境污染治理技术与设备,2004(01):19-22. |
| [7] | Huaxin Chen;Qinwu Xu .Experimental study of fibers in stabilizing and reinforcing asphalt binder[J].FUEL,2010,89:1616. |
| [8] | Shenoy A V;Saini D R.Thermoplastic meltrheology and processing[M].New York:Marcel Dekker,Inc,1996 |
| [9] | 吴建涛 .基于流变特性的沥青与集料交互作用能力的研究[D].哈尔滨工业大学,2009. |
| [10] | 孙志华,刘开平,汪敏强,王柱命,杨斐芃.自燃煤矸石活性研究[J].建筑材料学报,2013(03):497-502. |
| [11] | 宫晨琛,宋旭艳,李东旭.煅烧活化煤矸石的机理探讨[J].材料科学与工程学报,2005(01):88-91,108. |
| [12] | 张登良.沥青与沥青混合料[M].北京:人民交通出版社,1993:146. |
| [13] | 程永春;马慧莉;张鹏 等.不同填料沥青胶浆物理力学性能实验[J].吉林大学学报:工学版,2014,44(6):1629. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%