ENFORCE26805

• Permit No: C1981013
• IBM Index Class Name: Enforcement
• Doc Date: 2/1/2001
• Doc Name: REPORT CONCERNING AN INVESTIGATION INTO CONTINUED DAMAGE TO THE HOUSE & WATER SUPPLY PIPELINE AT THE
• Violation No.: CV2000009
• Media Type: D
• Archive: No

SOILS
Table 9.7
Typical Values of Optimum Moisture
Content and Suggested Compactions
(Based on Standazd Proctor Test)
range of range of percentage of

class
group
symbol

escription maximum
dry
densities
]ben/h3 optimum
moisture
content
%n Proctor
maximum
class
1 2

3
G W well-graded, clean gravels, gravel-sand mixtures 125-135 ] I-8 97 94 90
GP poorly-graded clean gravels, gravel sand mixtures 115-125 14-11 97 94 90
GM silty gravels, poorly graded gravel-sand silt 120-135 12-8 98 94 90
GC clayey gravels, poorly-graded gravel-sand-clay 115-130 19-9 98 99 90
SW well-graded clean sands, gravely sands 110-130 16-9 97 95 91
SP poorly-graded clean sands, sand-gravel mix 100-120 21-12 98 95 91
SM silty sands, poorly-graded sand-silt mix 170-125 16-11 98 95 91
51.4-SC sand-silt-clay mix with slightly plastic fines 110-130 15-11 99 96 92
SC clayey sands, poorly-graded sand-clay mix 105-125 19-11 99 96 92
ML inorganic silts and clayey silts 95-120 24-12 100 96 92
ML-CL mixture of organic silt and clay 100-120 22-12 100 96 92
CL irorganic clays of low-to-medium plasticity 95-120 24-12 100 96 9'2
OL organic silts and silt-clays, low plasticity 80-100 33-21 - 96 93
MH inorganic clayey silts, elastic silts 70-95 90-24 - 97 93
CH inorganic clays of high plasticity 'r5-105 36-19 - - 93
OH organic and silty clays 65-100 95-2] - 97 93
p:d
zero air
\ vends curve
Pr
~~ ~~
~~Pronor test ~~
curve ~ ~ ~
w
Figure 9.6 A Typical Zero Air Voids Curve
Example 9.4
A Proctor test using a 1/30 ft3 mold is performed on a
sample of soil.
test no. sample net mass wate r content
(]ben) (%)
1 9.28 i.3
2 4.52 9.7
3 4.60 11.0
4 4.55 12.8
5 9.50 14.4
9-11
If 0.032 cubic feet. of compacted soil tested at a construc-
tion site weighed 3.87 pounds wet and 3.74 pounds dry,
what is the percent. of compaction?
The actual density of sample 1 is (4.28)(30) = 128.4
Ibm/ft3. From equation 9.70. the dry density is
Pa = 100(123.4) = 119.71bm/ft3
100 + 7.3
The following table is constructed from the results of
all 5 tests.
test no. dry density
1 119.7
2 123.6
3 129.3
4 121.0
5 118.0
If this data is graphed, the following figure results.
The peak is neaz point 3, so take the maximum deu-
sity to be 129.3 lbm/ft3. The sample density is
3.79/0.032 = 116.9, so the percentage of compaction
is 116.9/124.3 = 0.94.
pd
w
recommended
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