# GEOTECH. ENG'g (particle-size distribution curve)

Submitted by Raymart Camino on June 23, 2016 - 10:22pm

in solving for UNIFORMITY COEFFICIENT (Cu = D60/D10)

what if D10 or 10% finer doesn't exis in the particle size distribution curve? How can i solve this? Help please, thank you.

GIVEN:

Diameter(mm) | % passing |

4.76 | 100 |

2.38 | 90 |

2.00 | 77 |

0.84 | 59 |

0.42 | 51 |

0.25 | 42 |

0.149 | 35 |

0.074 | 33 |

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## you need a logarithmic graph

you need a logarithmic graph to find the value of D60 and D10

## but sir, the graph terminates

but sir, the graph terminates at 33%, i cant intercept the 10%

## D60 is 0.88..

D60 is 0.88..

## You can tell a lot about the

You can tell a lot about the mechanical properties of the soil according to the value of the effective size D

_{10}. However, the sieve analysis is higher than 10%. In this case, the properties of this soil cannot be defined according to uniformity coefficient or anything that involves D_{10}. You need to determine the Atterberg limits of this soil and find its indices like liquidity index and plasticity index then plot the result into USCS chart.## Cal tech could help you..

Cal tech could help you.. Mode 3-4

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