07_South 18th Avenue Sanitary Sewer WSS Testing Report.pdf
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- Solicitation number
- 25-009037
- Issued by
- Adams County, Colorado
About this file
This document is a Water-Soluble Sulfate (WSS) Testing Report prepared by Soilogic, Inc. for Professional Engineering Consultants regarding a proposed sanitary sewer line project in Brighton, Colorado. The report details geotechnical testing conducted on two soil samples from site-specific borings along South 18th Avenue, between S. Bridge Street and E. Egbert Avenue, with the project identified as Soilogic Project # 24-1018.
The laboratory tests measured water-soluble sulfate concentrations of 0.0031 and 0.0062 percent by mass in the soil samples, which the American Concrete Institute (ACI) classifies as a negligible risk of concrete sulfate attack (Sulfate Exposure Class S0). The report recommends using Type I cement for site concrete, with Type I/II Portland cement as an additional precaution for sulfate resistance. Soilogic emphasizes that limiting concrete permeability and following good consolidation and curing procedures are more critical than cement type in preventing sulfate-related deterioration, and recommends using air-entrained structural concrete and designing foundation concrete in accordance with ACI Design Manual, Section 318, Chapter 4.
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Soilogic, Inc.
3522 Draft Horse Court • Loveland, CO 80538 • (970) 535-6144
April 4, 2024
Professional Engineering Consultants 351 Linden Street, Suite 100 Fort Collins, Colorado 80524
Attn: Kent Bruxvoort, P.E.
Re: Water-Soluble Sulfate Testing Report Proposed Sanitary Sewer Line South 18th Avenue, between S. Bridge Street & E. Egbert Avenue Brighton, Colorado Soilogic Project # 24-1018
Mr. Bruxvoort:
Soilogic Inc. (Soilogic) has received results of subcontracted water-soluble sulfate (WSS) testing for the referenced project. Results of the completed laboratory tests and associated geotechnical engineering recommendations are included with this report.
Water-soluble sulfates (WSS) tests were completed by a subcontracted laboratory on two
(2) selected soil samples obtained from the site-specific geotechnical borings to help evaluate corrosive soil characteristics with respect to structural concrete that will be in contact with the subsurface soils. The WSS concentrations measured in the submitted soil samples were determined to be 0.0031 and 0.0062 percent by mass in soil. ACI defines the measured concentrations as being a negligible risk of concrete sulfate attack (Sulfate Exposure Class S0); therefore, Type I cement should be suitable for site concrete. As an added precaution, Type I/II Portland cement could be considered for additional sulfate resistance of concrete in contact with the subgrade soils.
Utilizing the proper cement type and water/cement ratio outlined above will not eliminate the potential for sulfate attack. Even concrete mixes utilizing Type V cement for “severe” environments will deteriorate eventually under sulfate attack. Limiting the permeability of the concrete and good concrete consolidation and curing procedures are more important than cement type to reduce this risk. Air entrained structural concrete is recommended because those admixtures will reduce the mix water/cement ratio and resulting concrete permeability. Foundation concrete should be designed in accordance with the provisions of the ACI Design Manual, Section 318, Chapter 4.
Water-Soluble Sulfate Testing Report Proposed Sanitary Sewer Line – S. 18th Avenue between S. Bridge Street & E. Egbert Avenue Brighton, Colorado
Soilogic Project # 24-1018
We appreciate the opportunity to be of service to you on this project. If we can be of further service to in any way or if you have any questions concerning the enclosed information, please do not hesitate to contact us.
Very Truly Yours, Soilogic, Inc. Reviewed by:
Darrel DiCarlo, P.E. Alec Kaljian, P.E.
Senior Project Engineer Project Engineer
04/04/2024
04/04/2024
File details come from the government source that posted it. Updated .