Bituminous mix design
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The document discusses bituminous mix design which involves combining aggregates, bitumen, filler materials like cement or GGBS, shredded plastic, and an anti-stripping agent called Bitu-grip. It provides details on the materials used, testing procedures, results of mix designs for different types of mixes like BC, DBM, BM, and MSS. The use of shredded plastic and Bitu-grip can increase bonding between aggregate and bitumen while filler reduces voids and increases strength. GGBS can be used instead of cement, providing cost savings. Use of these additives results in reduced binder and bitumen content.
Bituminous mix design
- 1. BITUMINOUS MIX DESIGN • BASICS • Bituminous Mix design is Combination of Aggregate, bitumin,filler(Cement,GGBS,Lime), • Shreded plastic and Bitu-grip is few material is required to mix to increse the life of Mix and increase the affinity of coating of aggregate. • MS-2,IS-8887 ,IRC:SP:81-2008 and Specification of Ministry of Road and Transportation is used for design. • GGBS-Graded Granular Blast furnace slag.
- 2. MATERIALS • 1.Aggregate-A.Black Basalt B. Granite with quartz mix(Basic material),90% material is available of granite with quartz, while 10% materials of black basalt in jamshedpur city. • 2.Bitumin- VG30 is used for mix as a Binder. • 3.Filler-(Cement,Lime)-To reduce the voids and increase the strength. • 4.Other Materials • A. Shreded plastic(Used to increase the Bonding property and to reduce the binder content) • B. Anti Stripping Agent(Bitu-grip) to increase the bonding property between aggregate and Bitumin. • C.GGBS –Used alternate of cement or lime as a filler materials.It is also a use of waste of tata steel.
- 3. AGGREGATE Black Basalt (10% available) Granite(90% availability)
- 5. TESTING
- 6. Stripping Value Test Stripping value less if Bitu-Grip is not used. No stripping if Bitu-grip is used.
- 7. RESULT SUMMARY SUMMARY OF MIX DESIGN FOR BC,DBM ,BM AND MSS Sr.no . Type of Mix Thickness for Design AGGREGATE OBC/Resid ual Binder Plastic Bitugrip/a dditives Wate r Stability(K N) Standar d(KN) Actual Flow(mm) Density(N /mm2) Designed Flow(mm) 1BC- Grade-I (45-65)mm 20m m 10m m 6mm Cemen t GGBS 26% 32% 40% 2% 0%5% of mix 2% of mix 0.2% of mix 0 13.52 9 3.32.42 2 to 4 Alternative 2BC- Grade-I (45-65)mm 26% 32% 40% 0% 2%5% of mix 2% of mix 0.2% of mix 0 13.52 9 3.32.42 2 to 4 3BC-Grade-II (30-45)mm 0% 30% 68% 2% 0% 5.6% of mix 2% of mix 0.2% of mix 0 13.676 9 2.452.34 2 to 4 Alternate 4BC-Grade-II (30-45)mm 0% 30% 68% 0% 2% 5.6% of mix 2% of mix 0.2% of mix 0 9 2.34 2 to 4 5BM-Grade-II (50-75)mm 30% 50% 20% 0% 0%4% of mix 2% of mix 0.2% of mix 0 9 not specified 3.22.35 not specified Alternative 6BM-Grade-II (50-75)mm 30% 50% 20% 0% 2%4% of mix 2% of mix 0.2% of mix 0 9 not specified 3.22.35 not specified 7DBM-Grade-II more than 50mm 25% 33% 40% 2% 0% 4.5% of mix 2% of mix 0.2% of mix 0 13.98 9 2.52.35 2 to 4 Alternative 8DBM-Grade-II more than 50mm 25% 33% 40% 0% 2% 4.5% of mix 2% of mix 0.2% of mix 0 13.98 9 2.52.35 2 to 4 9 MSS(Close graded premix carpet) 20mm 0% 75% 23% 2% 0% 4.1% of mix 2% of mix 0.2% of mix 0 not specified 2.32 not specified Alternate 10 MSS(Close graded premix carpet) 20mm 0% 75% 23% 0% 2% 4.1% of mix 2% of mix 0.2% of mix 0 not specified 2.32 not specified 11 Microsurfacing( Grade-III) 11.1- 16.3kg/m2 0% 70% 30% 0% 2% 6.5-12% of aggregate 2% of aggregate 0.5-2% of aggregate 6-12% not specified not specified Alternate 12 Microsurfacing( Grade-III) 11.1- 16.3kg/m2 0% 70% 30% 2% 0% 6.5-12% of aggregate 2% of Aggregat e 0.5-2% of Aggregate 6-12% not specified not specified Slurry 10.1- 6.5-12% of 2% of Aggregat 0.5-2% of not not
- 8. NOTE • 1.Bitugrip is used of M/S HINCOL • 2. Source of stone chips - Hatha • 3.Bitumen Grade- VG30 • 4.For Tack coat RS1(E:W::1:2),For Microsurfacing Modified Bitumen Emulsion ,for slurry seal SS2 cationic Bitumen Emulsion is used. • 4.PSC-Lafarze Cement or GGBS or OPC • 5. In BC-II , no deleterious material or organic material or overburden dust or clay mix is allowed. • 6. This mix design should be calibrated in Hot mix plant before implement and plant proportion should be prepared.
- 9. Comparative Benefit • 1.Bitu-grip is used to increase the Bonding property between aggregate and bitumen. • 2.Filler is used to reduce the void in Mix and to increase strength. • 3.Shreded plastic is used in mix design it will help to reduce binder and re- use of waste products to save Enviornment.
- 10. COST COMPARISION TO EXISTING • 1. 0.6% quantity of bitumen is saved in BC-I. • 2. 0.2% quantity of Bitu-grip have extra cost. • 3.2% shreded plastic is under use is also a extra cost . • 4.GGBS should be used in place of cement is also causes for cost savings.
- 11. Calculations Ex. If 100000sqm of 40mm BC is planned then there QUANTITY Item Qty. UOM Rate(Rs) Cost BC-40mm 100000 sqm Mix 9360000 kg Bitumen(5.6) 524160 kg Bitumen(5) 468000 kg Savings 56160 kg 42 2358720 Cement 187200 kg GGBS 187200 kg Savings Cost saving from cement to GGBS 3 561600 Plastic 187200 kg Bitugrip 18720 kg 225 4212000
- 12. Microsurfacing Ex.If 200000sqm of Microsurfacing is planned then there QUANTITY Item Qty. UOM Rate(Rs) Cost Microsurfacing 200000 sqm Mix 3260000 kg cement 65200 kg GGBS 65200 kg Savings Cost saving from cement to GGBS 3 195600