This section gives requirements for normal weight structural concrete, concrete riprap, and pneumatically placed concrete.
(Ordinance 2007-106, App. B, adopted 3/20/07)
Section 03100 Concrete Formwork Section 03200 Concrete Reinforcement
Section 03250 Concrete Joints and Embedded Items
(Ordinance 2007-106, App. B, adopted 3/20/07)
There will be no separate measurement and payment for work performed under this section unless otherwise shown on the Bid Form.
(Ordinance 2007-106, App. B, adopted 3/20/07)
The applicable provisions of the following standards shall apply as if written here in their entirety:
ACI American Concrete Institute
ASTM American Society for Testing and Materials
(Ordinance 2007-106, App. B, adopted 3/20/07)
Four (4) classes of concrete designated by the minimum seven (7) day and twenty-eight (28) day compressive strength in pounds per square inch (psi) are covered by this specification and are as follows:
 
Compressive Strength (psi)
Class
7 days
28 days
A
1,350
2,000
B
1,700
2,500
C
2,000
3,000
D
2,350
3,500
Unless shown otherwise on the plans, concrete shall be Class “D”.
(Ordinance 2007-106, App. B, adopted 3/20/07)
Submit the following information for the review and approval of the City of Magnolia, Engineer or designated representative of the Engineer:
A. 
Cement.
Submit certified test reports for the cement to be used on the project.
B. 
Aggregate.
Submit certified test reports for the aggregate to be used on the project. Testing of aggregate shall be conformance with ASTM C33.
C. 
Admixtures.
Submit brochures, manufacturers instructions for use, and performance data on all proposed admixtures.
D. 
Design Mix.
Submit test data on proposed design mixes for each class of concrete to be used on the project. Test data shall include both the 7-day and 28-day compressive strength tests results to establish a quality control standard for use during the construction period. No concrete shall be placed before the design mix is submitted and approved. An analysis showing the relationship between the water-cement ratio and the compressive strength of the concrete mix shall be submitted with the design mix.
The number of copies of each submittal shall be as requested by the Engineer or designated representative of the Engineer.
(Ordinance 2007-106, App. B, adopted 3/20/07)
It shall be the responsibility of the Contractor to produce concrete of the strength, durability, workability and specified finish; furnish representative materials for specimens in quantities required by the testing laboratory; take samples of materials for testing; check proportions of mix and immediately notify the Engineer or designated representative of the Engineer if proportions appear improper in any respect. The Contractor shall comply with all testing laboratory findings and the decisions of the Engineer or designated representative of the Engineer in reference to these findings. The Contractor shall pay for the redesign of the concrete mix due to a change in the source of materials.
(Ordinance 2007-106, App. B, adopted 3/20/07)
A. 
Cement.
Store cement in weathertight buildings, bins or silos to provide protection from dampness and contamination and to minimize warehouse set.
B. 
Aggregate.
Arrange and use aggregate stockpiles to avoid excessive segregation or contamination with other materials or with other sizes of like aggregates. Do not use frozen or partially frozen aggregates.
C. 
Sand.
Sand shall be stored such that it maintains a uniform moisture content.
D. 
Admixtures.
Store and handle admixtures in accordance with manufacturer’s instructions.
E. 
Batch Tickets.
Batch tickets shall be delivered with each load of concrete and shall include the weights of each ingredient for the batched load of concrete and the date and time the load was batched. The testing agency representative shall keep at least one (1) copy of the batch ticket.
(Ordinance 2007-106, App. B, adopted 3/20/07)