Brighton Manor-CS040426 (2)Construction Materials Testing
and Environmental Consulting
Texas
CMT,
Inc.
10044 Monroe Drive Dallas,
April 26, 2004
Mr. John Speanburg
Street Real Estate, LTD
dba Geometric Land Group
1660 S. Stemmons Freeway
Lewisville, Texas 75067
Project No. 204-0126
Brighton Manor
Coppell, Texas
Texas 75229
(214) 352-6957
Fax (214) 352-6972 ° www .texascmt.com
NO
TA
Dear Mr. Speanburg:
A representative of Texas CMT, Inc. picked up several samples of the pavement subgrade material at the
above referenced project on April 15, 2004. The purpose was to perform lime and cement series testing.
The samples were transported to the laboratory and classification tests were performed. The test results were
as follows:
Sample Location Description Liquid Plastic Plasticity % Passing a No.
Limit Limit Index 200 US Sieve
I Duncan Drive, in front Light Brown 2 ! 10 11 21
of Block B, Lot 7 Clayey Sand
2 Duncan Drive, in front Yellowish N/P N/P N/P 10
of Block C, Lot 2 Orange Silty Sand
3 Hood Court, in front Light Brown Clayey 21 13 8 15
of Block B, Lot 4 Sand w/pea gravel
4 Hood Drive, in front Light & Dark Gray 53 26 27 79
of Block B, Lot I Shale w/olive gray
clay
Street Real Estate, LTD April 28, 2004
Based on the above results, lime and cement series tests were mn on Sample #4 with the following results:
Percent Lime Added
(By Dry Weight)
Results of Lime Series
Liquid Limit
Plastic Limit
Plasticity Index
0 53 26 27
3 57 34 23
5 56 35 21
7 55 36 18
9 55 35 20
Percent Cement Added
(By Dry Weight)
Results of Cement Series
Liquid Limit
Plastic Limit
Plasticity Index
0 53 26 27
3 57 35 22
5 53 34 19
7 56 38 18
9 57 38 19
Based on the above results, the sandy nature of some of the soil samples and exposed shale subgrade, it is our
recommendation that a minimum of nine (9) percent cement (by dry weight) be added to paving subgrade.
This would be equivalent to approximately 40.5 pounds per square yard for a six (6) inch thick subgrade layer.
Pavement subgrade should be adequately compacted and moisture conditioned in accordance with accepted
plans and specifications. Our recommendations are based on the assumption that a minimum six (6) inch thick
3,000 psi Portland cement concrete pavement will be utilized. Drainage should be maintained away from
pavement sections.
Texas CMT, Inc. Page 2 of 3
Street Real Estate, LTD April 28, 2004
If you have any questions or if you require further information, please do not hesitate to contact us.
Sincerely,
TexasCMi'Inc'%
Alex S~
Project Engineer
Construction Materials Engineering Division
AS :RWG/dwe
cc: Mr. Jim Street - Street Homes Mr. Larry Davis - City of Coppell
Mr. Rodney Louviere - Fax: 972-931-6787
Texas CMT, Inc. Page 3 of 3