In road construction, different kinds of filler materials are used. Among them the veryrncommon are stone dust, cement, lime, crushed concrete, flay ash and crushed glass fines.rnThese materials have their own drawbacks such as high cost and availability rnTherefore, the theme of this thesis is to assess the rheological property of recycled hollowrnblock to use it as mastic asphalt(blends of binder and recycled hollow block), as it is easilyrnavailable from the wastes of building construction and also from hollow blockrnmanufacturing companies. rnThe objective of this research is hence to identify the availability of Hollow Block wasternmaterial from construction sites and manufacturing companies, to study the basicrnengineering properties of recycled Hollow Block before blending (as filler material) and torncharacterize the rheological property of mastic. i.e. Linear Visco Elastic (LVE) range,rnmaster curve and Multiple stress creep recovery(MSCR) of mastics. rnTo meet the objectives, to know the availability of waste Hollow Blocks questionnairesrnwere distributed to different real estate companies, construction companies and HollowrnBlock manufacturing companies. A chemical composition test was performed to checkrnon the chemical properties .For the Hollow block as a filler material specific gravity test,rnsieve analysis and plasticity index test were done. After having performed the filler tests,rnrecycled hollow block was blended with the bitumen at 15%, 25% and 35% of thernbinder. After doing so, different tests for the binder and the mastic were performed torncheck on penetration, ductility, softening point, loss on heating. rnThe rheological properties of both the binder and mastic were checked by different tests such rnas amplitude sweep test, Frequency sweep test, Performance grade determination and MSCRrnwere performed by Dynamic Shear Rheometer (DSR). rnPrior to performing Frequency Sweeps Test (FST), Amplitude Sweep Tests (AST)wasrnperformed to establish the linear viscoelastic range of the mastics performed at differentrntemperatures at 10 rad/s. After completing the AST based on LVE range, frequencyrnsweeps for a range of temperatures and frequencies were performed on all the samples.rnFrequency sweeps are used to measure the complex shear modulus (G*) and the phase angle Î´ at different temperatures by applying a defined strain and a sweep of frequenciesrnallowing construction of the master curves for the binder under consideration. rnWhile adding recycled hollow block in the binder will make the asphalt material stiff, thernLVE Range decrease with increasing the content of recycled hollow block and increasernwith increasing temperature. The FST results show that, in the low frequency regionrn(high temperatures) and high frequency region (Low temperatures), the rheologicalrnbehavior of the unaged and Aged mastics differs from the neat binder and increase thernstiffness which is directly related to the durability. Furthermore, Based on the MSCR testrnas the content of recycled hollow block increased the non-recoverable compliance rndecrease at 0.1 kPa and 3.2 kPa shear stress levels, this notify as the rutting resistance isrngood . rnThe research concludes that adding recycled hollow block in Asphalt materials improves rnthe performance of mixtures and increases the life of pavement. Furthermore, the fact thatrnwaste is being utilized meets advantage in reducing usage of virgin material andrnenvironmental pollution.