Experimental Study Of Modified Bitumen With Crumb Rubber (CRMB) And Low Density Polythene (LDPE)
Keywords:
Crumb Rubber, Low Density Polyethylene (LDPE), Bituminous Concrete, Marshall Properties, Semi Dense Bituminous Macadam (SDBM).Abstract
The most important and widely used material in the construction of pavement is Bituminous concrete. It consists of asphalt or bitumen (used as a binder) and mineral aggregate which are mixed together & laid down in layers then compacted. This dissertation presents a research of modification of bitumen mix by use the different materials for preventing the damage of pavement and conducted to experimental study use of waste plastic, low density polyethylene (LDPE) and crumb rubber (CRMB) for the design of bituminous mixes at the different mix design characteristics and for conventional bitumen (60/70). The dry and wet process used to find the optimum % of bitumen content.
When the crumb rubber and polythene mixed with varying percentage (3, 6, 9 and 12) and (2, 4, 6 and 8) to the 60/70 grade bitumen their optimum values are 9 % (for CRMB) and 8% (for LDPE) respectively. After combination of these materials with their optimum value with bitumen the Marshall Stability value has observed. The optimum binder content reduce to 5.25% with the combination of optimum dose of CRMB i.e., 9% and optimum dose of LDPE i.e. 8% respectively compare to ordinary bituminous mix i.e., 5.5%.
