RFI_Taxiway_Repair.docx

EXHIBIT F

PROPOSAL INQUIRY FORMAT

SOLICITATION W912K6-15-R-0011

NOTE: ALL PRE-PROPOSAL INQUIRIES SHALL BE SUBMITTED VIA EMAIL IN THIS FORMAT!!

EMAIL: 175WG.MSC@ang.af.mil

Date of RFI Answer: 14 Aug 15

2.7.4.7 Rapid Set Cement ; Direction is needed, with a specific scope of concrete prep, precautions, procedures, psi strengths, mix requirements, exact testing required, placement , finishing, cold weather requirments and curing to protect the Maryland Air National Guard and the contractor.

1). Want is the concrete’s psi strength that Maryland Air National Guard is trying to achieve and in how many days of curing does the concrete have to meet that psi strength ?

2). What temperatures do you want the concrete poured in.

3). What procedures is required if temperatures fall.( Cold weather or Winter pouring) Blanketing? Double Blanketing , Chemicals, Temp heat etc.

4). Will theses days be credited back if the weather is to cold to pour concrete.

1. Concrete shall be 650 psi at 90 days (Specified Flexural Strength R)

2. Paving in hot weather: Concrete must not exceed 90 degrees F.

2a. Follow Practices found in ACI 305R.

3. Paving in cold weather: When the ambient temperature is less than 50 degrees F ensure temperature of concrete is not less than 50 degrees F. Do not place concrete unless the ambient temperature is at least 35 degrees F and rising.

3a Mixture Proportion: An accelerating admixture may be used when ambient temperature is below 50 degrees. Provide covering and other means for maintaining the temperature above freezing for not less than 72 hours.

4. An appropriate credit will be applied if applicable.