Is well graded gravel or poor graded gravel better for foundation?

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Chun Hin Pun

April 30, 2022 14:59

Is well-graded gravel or poor graded gravel better for foundation?

I will always confused with that if someone can help me thanks!

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  Hannah Miller April 30, 2022 15:41

  If I remember properly, Amber Books discusses that well-graded gravel is good for a foundation while poorly graded gravel is good for drainage. Well graded gravel suggests that the gravel is firmly locked in place and cannot slip past one another, with poorly graded gravel leaving open spaces where water can freely travel. 

  Someone correct me if I'm wrong because I have PA this Monday! 

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  Robert Ward October 01, 2022 20:00

  Well graded gravel = smooth range of stone sizes along a Gradient

  Poorly graded gravel = irreglaur range of sizes along a Gradient; therefore subject to liquefaction

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