What is the meaning of Proctor? 2

• Jan 4, 2022

1
• #2

Milliontown

Geotechnical

Jan 8, 2017

64

Ralph Proctor was the field engineer on the Bouquet Canyon dam project (and St. Francis Dam) for the LA Department of Water and Power. He developed the standard we know know as the proctor test. The proctor test was modified (I think during WWII) by USACE to increase compaction for airfields serving larger bombers.

 

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• Jan 4, 2022

• Thread starter
• #3

tmgczb

Structural

May 12, 2021

158

Milliontown said:

So Proctor is the name of an engineer. But I saw the word in the report record of a lab.

Click to expand...

 

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• Jan 4, 2022

• #4

GeoEnvGuy

Geotechnical

Nov 27, 2018

582

Yes it is the name of the engineer. The term is referenced in the ASTM as well

"the equipment and procedures are similar as those proposed by R.R. Proctor 1933... The standard effort test is sometimes referred to as the Proctor test."

 

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• Jan 4, 2022

• #5

dik

Structural

Apr 13, 2001

25,752

thanks for the info.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

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• Jan 4, 2022

1
• #6

epoxybot

Structural

Jul 31, 2006

597

I came across these powerpoint presentations awhile back.

HOW GEOTECHNICAL ENGINEERING NEEDS SHAPED THE HISTORY OF CALIFORNIA

COMPACTION TESTS evolved to support bomber loads on runways

 

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• Jan 5, 2022

• #7

EireChch

Geotechnical

Jul 25, 2012

1,307

Easily found using google

 

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• Jan 7, 2022

• #8

geotechguy1

Civil/Environmental

Oct 23, 2009

667

Question has already been answered but note that the same test is just referred to as 'Standard Compaction Test' in the UK, NZ and Australia. Alternately the test called the 'DCP' is called a 'Scala' in NZ.

Geotechs have a weird thing for cults of personality.

 

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• Jan 7, 2022

• #9

EireChch

Geotechnical

Jul 25, 2012

1,307

Some people also refer to it as 2.5kg and 4.5kg compaction test, being standard and modified, respectively.

I think DCP/scala is one of the most under used test in geotechnical engineering, especially for road and somewhat underused for residential.

 

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• Jan 7, 2022

• #10

BigH

Geotechnical

Dec 1, 2002

6,012

The tests are also called Light and Heavy . . . depending on the hammer used.

If I remember years ago - John Focht posted that originally test was actually based on the wet density . . . . but I could be mistaken due to a few senior moments . . .

 

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• Jan 7, 2022

• #11

geotechguy1

Civil/Environmental

Oct 23, 2009

667

DCP/scala is definitely underused in North America. It's quick, cheap, easy, and it's absolutely brilliant character building for grads. Plus it looks alot more like actually doing something than a heel test or pushing a bearing probe or bit of rebar an inch into the ground.

 

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