calibration of various types of laboratory instruments, equipment, apparatus installed at the laboratories of road and building research institute, p. w. roads directorate-2 water bath (dtc) range 0-100°c 3 aggregate impact value apparatus 4 digital balance 600 gm 5 theoretical maximum specific gravity apparatus 6 electrically operated bitumen extractor (rpm) 7 marshal stability and flow testing apparatus load cell and svdt 8 constant temperature apparatus (dtc) 9 bitumen mixture apparatus 10 digital balance 30 kg 11 flakiness index and elongation gauge apparatus 12 vicat apparatus 13 universal testing machine laboratory 14 universal testing machine,0-2000 kn 15 bitumen laboratory 16 saybolt viscometer with four saybolt tube 17 loss of heating app (dtc) range 0-400°c 18 soil laboratory 19 electric oven (dtc) range 0-400°c 20 dial gauge 21 digital tachometer (60-50000 rpm) 22 soil hydrometer (0.995- 1.030 sp) 23 digital triaxial testing machine 24 2 kn capacity digital direct shear testing apparatus with different stain control silent feature. (weight) 25 consolidation apparatus gauge 0.002 x 5 mm, three-gang digital summary 26 electrically operated unconfined compression testing machine apparatus. 27 measuring cylinder (1000 ml) 28 measuring cylinder (100 ml) 29 electric oven (dtc) range 0-400°c 30 cbr mould 31 is sieve of the following sizes: 32 i) 75 mm 33 ii) 63 mm 34 iii) 53 mm 35 iv) 50 mm 36 v) 45 mm 37 vi) 40 mm 38 vii) 37.5 mm 39 viii) 31.5 mm 40 ix) 26.5 mm 41 x) 25 mm 42 xi) 22.4 mm 43 xii) 20 mm 44 xiii) 19 mm 45 xiv) 16 mm 46 xv) 13.2 mm 47 xvi) 12.5 mm 48 xvii) 11.2 mm 49 xviii) 10 mm 50 xix) 9.5 mm 51 xx) 8 mm 52 xxi) 6.3 mm 53 xxii) 4.75 mm 54 xxiii) 4 mm 55 xxiv) 2.36 mm 56 xxv) 1.7 mm 57 xxvi) 1.18 mm 58 xxvii) 850 micron 59 xxviii) 600 micron 60 xxix) 425 micron 61 xxx) 300 micron 62 xxxi) 150 micron 63 xxxii) 75 micron