1) An aggregate blend consists of four different aggregate named as A, B, C, and

Question

1) An aggregate blend consists of four different aggregate named as A, B, C, and D Sieve Min Max Mid Blend Size/mmAB 97.5 87.5 66.5 51.5 12.5 9.5 4.75 2.36 .18 0.6 0.3 0.15 0.075 Blend mix 100 95 75 60 100 91.6 62.4 47.3 32.25 24.55 18.15 12.15 10.55 100100100 100 79 100 100 100 68 100100 100 60 100 95 95 80 58 43 95 20 35 27.5 39 30 20 12 40% | 15% | 35% | 10% Given the values of specific gravity listed below for the aggregate gradations above Gs for coarse fraction, aggregate A- 2.46 Gs for coarse fraction, aggregate B 2.25 Gs for fine fraction, aggregate A- 2.82 Gs for fine fraction, aggregate B-2.75 Gs for fine fraction, aggregate C 2.63 Gs for fine fraction, aggregate D-2.98 Based on the given information determine: (a) The average coarse specific gravity, (b) The average fine specific gravity, (c) Overall (blend) average specific gravity

Explanation / Answer

Answer a

Average coarse specific gravity =( 2.46+ 2.25)/2 = 2.355

Answer b

Average fine specific gravity = (2.82+2.75+2.63+2.98)/4 = 2.795

Answer c

Average specific gravity of A = 0.82*2.46+ .18*2.82 = 2.5248

Average specific gravity of B = 0.32*2.25 + 0.68*2.75 = 2.59

Thus for blend = 0.4*2.5248 + 0.15*2.59 + 0.35*2.63 +0.1*2.98 = 2.61692

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.