704.1(d) 704.1(f) the same equipment used for acceptance and verification testing. The Representative will forward the remaining three QA cylinders to the LTS for 28- day compressive strength testing according to PTM No. 604 and hardened air content testing according to PTM No. 623. Furnish packaging material and package cylinders under the direction and supervision of the Representative. Place the cylinders in individual containers cushioned with suitable material to prevent damage during shipment. The total weight of each container, cylinder and cushioning material must not exceed 50 pounds. QA personnel will perform an independent assurance evaluation of the 28- day compressive strength test results. If the difference between the test results of the cylinders tested at the project site and the cylinders tested at the LTS is more than 500 pounds per square inch, the Representative will immediately review the testing procedures, equipment, and personnel used in the acceptance testing and implement corrective measures to ensure the tests are performed within the prescribed tolerances.
For plant and truck mixed concrete, measure by weight. The Contractor may measure the weight of the cement separately in an enclosed compartment in the aggregate hopper. The Contractor may measure the weight of the cement and discharge it simultaneously with the aggregates, except as specified in Section 106.05(c). For volumetric mixed concrete, measure by volume.
For plant or truck mixed concrete, measure by weight unless otherwise allowed. Base measurements on the material weight -volume relationship, as specified in Section 704.1(b)1. For volumetric mixed concrete, measure by volume.
Use water -measuring systems capable of discharging the total quantity of measured water into the plant or truck mixer drum in a time not greater than one -fourth of the specified mixing time. For truck mixed concrete, do not add water from the truck waters ystem. Add water only from the plant water measuring system.
using a suitable visual measuring device. If another type of admixture is used with an air -entraining admixture, add it in solution to another portion of the mix water, as directed, by an additional suitable visual measuring device, except high range water reducing and anti -washout admixtures will be added according to the manufacturer ’s recommendations. Equip the measuring device with interlocks to prevent dischargi