正时皮带回收纤维对高性能混凝土性能的影响
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摘要
讨论了在高性能混凝土中添加废旧纤维以改良其性能的可能性。所用的废旧纤维来自于汽车发动机的正时皮带。运用破坏性和非破坏性试验方法对混凝土样本的不同性质如:抗压强度,抗折强度,内部声波传输速度和电阻率进行测试。另外,进行了新拌混凝土坍落度测试。试验结果表明,废旧纤维的添加量在低百分比(推荐不超过0.5%)时,混凝土样本的抗压强度和抗折强度得以改善。超声声波速度传输和电导率测试表明随着纤维掺入量增多,纤维强化混凝土内部的孔隙体积和它的电阻率都增大。
The applicability of improving the performance of high performance concrete(HPC)by adding recycled fiber is discussed.The fiber is coming from the timing belt of the car engine.The properties of the sample concrete,such as compressive strength,flexural strength,interior velocity of ultrasonic,and electrical resistance,are tested by destructive and non-destructive methods.Slump flow test is conducted as well.Results show compressive and flexural strength are improved when the volume percentage of the fiber at low level(not exceeding 0.5%).The ultrasonic and electrical conduct tests show an increase of fiber increases the pore volume and the electrical resistance of the fiber reinforced concrete.
The applicability of improving the performance of high performance concrete(HPC)by adding recycled fiber is discussed.The fiber is coming from the timing belt of the car engine.The properties of the sample concrete,such as compressive strength,flexural strength,interior velocity of ultrasonic,and electrical resistance,are tested by destructive and non-destructive methods.Slump flow test is conducted as well.Results show compressive and flexural strength are improved when the volume percentage of the fiber at low level(not exceeding 0.5%).The ultrasonic and electrical conduct tests show an increase of fiber increases the pore volume and the electrical resistance of the fiber reinforced concrete.
引文
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[6]陈万祥,郭志昆,杨亮.钢纤维RPC力学性能的试验研究[J].工业建筑,2005,35(6):61-63.
[7]鞠彦忠,于泳,王德弘.不同养护条件下钢纤维掺量对RPC强度的影响[J].混凝土与水泥制品,2015(4):42-44.
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[11]HASSAN A M T,JONES S W.Non-destructive testing of ultra-high performancefiber reinforced concrete(UHPFRC):a feasibility study for using ultrasonic andresonant frequency testing techniques[J].Constr Build Mater,2012(35):361-367.
[2]MEDDAH M S,BENCHEIKH M.Properties of concrete reinforced with differentkinds of industrial waste fibre materials[J].Constr Build Mater,2009,23(10):3196-205.
[3]沈涛,董崇海,汪晖.玄武岩纤维对RPC电通量和力学性能影响[J].低温建筑技术,2014(3):1-3.
[4]王海良,李国兴,杨新磊.掺玄武岩活性粉末砂浆的试验研究[J].建筑结构,2012,42(增刊):454-455.
[5]任韦波,徐金余,张宗刚.高温后玄武岩纤维增强混凝土的冲击变形特性[J].建筑材料学报,2014,17(5):768-773.
[6]陈万祥,郭志昆,杨亮.钢纤维RPC力学性能的试验研究[J].工业建筑,2005,35(6):61-63.
[7]鞠彦忠,于泳,王德弘.不同养护条件下钢纤维掺量对RPC强度的影响[J].混凝土与水泥制品,2015(4):42-44.
[8]CARRASQUILLO R L,NILSON A H,SLATE F O.Properties of highstrength concretesubjected to short-term loads[J].ACI J,1981,78(3):171-178.
[9]NILSON A H.Design implications of current research on highstrength concrete[J].ACI Spec Public,1985(87):85-118.
[10]KHALOO A R,KIM N.Mechanical properties of normal to highstrength steel fiberreinforced concrete[J].Cement,concrete,and aggregates.ASTM J,1996,18(2):92-97.
[11]HASSAN A M T,JONES S W.Non-destructive testing of ultra-high performancefiber reinforced concrete(UHPFRC):a feasibility study for using ultrasonic andresonant frequency testing techniques[J].Constr Build Mater,2012(35):361-367.