PRELIMINARY TESTS Clause Samples

PRELIMINARY TESTS. Test specimens shall be prepared with at least two different water/cement ratios for each class of concrete, consistent with workability required for the nature of the work. The materials and proportions used in making preliminary tests shall be similar in all respects to those to be actually employed in the works as the object of these tests is to determine the properties of cement, aggregates and water necessary to produce concrete of required consistency and to give the specified strength. It will be Contractor's sole responsibility to carry out these tests and he shall therefore furnish to Engineer a statement of proportions proposed to be used for the various concrete mixes. For preliminary tests, the following procedure shall be followed:

PRELIMINARY TESTS. Because a dual-loop detector consists of two single loops (M and S), if a dual- loop detector functions well, the volume data collected by the dual-loop system should be consistent with the volumes collected by the two corresponding single loops. To check this consistency, ten dual-loop detectors were randomly chosen from I-5, I-90, I-405, and SR 520 freeways by the author to perform preliminary tests. Dual-loop volume data (T) and corresponding single-volume loop data (M and S) for a 60-minute period were compared to get general descriptive statistics for these dual-loop systems. As can be seen in Table 2, although the volume difference between each pair of individual M and S loop measurement was not significantly large, the volume difference between the single-loop measurements and the corresponding dual-loop measurement was considerable. Whereas in some cases the difference was small (3 percent or less), in many cases the discrepancies were serious (differences of 60 percent or more). Volume data collected by the dual loop systems were consistently lower than the corresponding volumes measured by the corresponding single loops. To check how accurately dual-loop detectors estimate vehicle lengths and distribute them into corresponding categories (bins), the Washington State Transportation Center (TRAC) performed some tests to compare dual-loop data and video data collected in the HOV Evaluation Project (Ishimaru, 2000). The comparisons indicated that the loop-based truck percentage consistently underestimated the truck percentage observed in the HOV study by degrees varying from 1 percent to 100 percent or more.

PRELIMINARY TESTS. .1 Hydrostatically test each system at 200 psig for a 2 hour period with no leakage or reduction in pressure. .2 Flush piping with potable water in accordance with NFPA 13. .3 Piping above suspended ceilings: tested, inspected, and approved before installation of ceilings. .4 Test alarms and other devices. .5 Test water flow alarms by flowing water through inspector's test connection. When tests have been completed and corrections made, submit signed and dated certificate in accordance with NFPA 13.

PRELIMINARY TESTS. Generate Punch List

PRELIMINARY TESTS. Promptly upon execution of the Agreement, SIBIA will arrange at MEIJI's sole expense to have a third party contractor, to be selected by SIBIA and approved by MEIJI, [*] in accordance with mutually agreed protocols thereof. In the event that a [*]. MEIJI may, at its discretion, terminate this Agreement. [*]

PRELIMINARY TESTS. The materials and proportion used in main preliminary tests shall be similar in all respects to hose to be actually employed in the works as the object of this test is to determine proportion of cement, aggregates and water necessary to produce the concrete of consistency required to give the strength specified. It will be the contractor's sole responsibility to carry out these tests and he shall therefore furnish to the Engineer, statement of proportions proposed to be used for concrete mix. For preliminary tests, the following procedure shall be followed. Materials shall be brought to the room temperature and all materials shall be in a dry condition. The quantities of water, cement and aggregate for each batch shall be determined by weight to an accuracy of 1 Part in 1000. (a) Mixing: Concrete shall be mixed in a mechanical mixer. The mixer should comply with IS: 1791. The cement and fine aggregate shall first be mixed dry until the mixture is in uniform colour. The coarse aggregate shall then be added, mixed and water added and mixed thoroughly for a period of not less than two minutes after all the materials are in the drum and until the resulting concrete is uniform in appearance. If there is segregation after unloading from the mixer, the concrete should be remixed. (b) The consistency of each batch of concrete shall be measured immediately after mixing, by the slump test in accordance with IS: 1999. In the slump test, care shall be taken to ensure that no water is lost; the material used for slump test may be remixed with the remainder of concrete for making the test specimen. The period of remixing shall be as short as possible yet sufficient to produce a homogeneous mass. Note : In exceptional circumstances such as mechanical breakdown of mixer, work in the remote areas or when the quantity of concrete work is very small, hand mixing may be permitted, subject to adding 10% extra cement at his (contractors) cost. When hand mixing Is permitted, It shall be carried out on a watertight platform and care shall be taken to ensure that mixing is continued until the concrete is uniform in colour and consistency.

PRELIMINARY TESTS. Since a dual- loop detector consists of two single loops (M and S), if a dual- loop detector functions well, the volume data collected by the dual- loop system should be consistent with the volumes collected by the two corresponding single loops. To check this consistency, ten dual- loop detectors were randomly chosen from I-5, I-90, I-405, and SR 520 freeways by the author to perform preliminary tests. Dual- loop volume data (T) and corresponding single-volume loop data (M and S) for a 60- minute period were compared to get general descriptive statistics for these dual- loop systems. As can be seen in Table 2, although the volume difference between each pair of individual M and S loop measurement was not significantly large, the volume difference between the single- loop measurements and the corresponding dual- loop measurement was considerable. While in some cases the difference was small (3 percent or less), in many cases the discrepancies were serious (differences of 60 percent or more). Volume data collected by the dual loop systems were consistently lower than the corresponding volumes measured by the corresponding single loops.

PRELIMINARY TESTS. The various tests and procedures to be performed in connection with Check-out and Start-up, as set forth in the Test Procedures.