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CONSIDERATION AND AWARDING OF BID 1920-23 FOR THE PURCHASE OF PORTLAND CEMENT CONCRETE FOR USE BY THE PUBLIC WORKS STREET AND STORMWATER DIVISIONS.
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BACKGROUND: The City of Norman Street and Storm Water Maintenance Programs utilize the following types of Portland Cement Concrete on a frequent basis:
1. Class A Concrete is used in pavement slabs, sidewalks, retaining walls, culverts, and all areas where reinforced concrete is needed. Calcium is used as an accelerating admixture to increase the strength of the concrete during curing more quickly. It is used in cold weather application; however, it is not an anti-freezing agent.
2. High Early Strength (H.E.S.) Concrete is used for driveway and pavement replacement, to cure even more quickly than Class A Concrete.
3. Fast Track Concrete is used for emergency panel replacement in high traffic areas. Within 8 hours of application, this concrete type is tested to be able to support 3000 pounds per square inch.
4. Grout Mix is used with riprap, for bedding drainage pipe, and stabilizing plastic subgrade.
5. Flowable Fill is used as a liquid concrete mix in bedding and backfilling culvert pipe and storm sewers where 100 percent compaction is required.
6. Additives/Accelerators are used to speed the setting time and when cure time starts earlier. This allows concrete to be placed in winter, with reduced risk of frost damage.
Quantities of each material purchased annually will vary depending on individual project scopes for scheduled projects and unscheduled repairs and maintenance activities. A total of 1,333 cubic yards of Portland Cement Concrete were purchased in fiscal year 2018-2019 (FYE 2019), at a cost of $139,965.
DISCUSSION: Bid information was sent to six (6) vendors and BID-1920-23 was opened on September 26, 2019, with three (3) vendor bids received for Portland Cement Concrete. The price of concrete materials has increased an average of 1% over the 2019 bid price because of increased...
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