Bearings INDEX

The test in accordance with CEN EN 13286-47 (2012) is carried out in materials passing through a 22.4 mm sieve. By carrying out the test, the CBR and the immediate bearing index are determined, in case the latter one is required. 

The difference between CBR and immediate bearing index determination is the use or non-use of annular weights. Annular weights on soil material are used for the determination of CBR, regardless of how the specimen is cured. However, this is not the case when it comes to the determination of the immediate bearing index. Apart from the above difference, the rest of the procedure is the same for both tests. 

CEN EN 13286-47. 2012. Unbound and hydraulically bound mixtures, Part 47 Test methods for the determination of the California bearing ratio, immediate bearing index and linear swelling. Brussels CEN. 

The properties required to be determined depend on the requirements of the national specification. In general, it is required to determine the compressive strength after 28 days, tested in compliance with CEN EN 13286-41 (2003), or when required, the immediate bearing index, tested in compliance with CEN EN 13286-47 (2012). The latter is almost the same as the CBR test. 

In the equation, Hi, Vi and Si are molar values at constant pressure for heat content, for volume and for entropy. The letters bearing index 1 as usual relate to the solvent. The sign A indicates that the difference between the molar values for the solution and for the pure solvent is to be inserted in the equation. 

The functional parameters [55], such as surface bearing index (the ratio of the RMS deviation over the surface height at 5% bearing area) core fluid retention index (the ratio of the void volume of the sampling area at the core zone divided by the RMS deviation) and valley fluid retention index (the ratio of the void volume of the sampling area of the valley zone divided by the RMS deviation) are computed directly from this curve. The evaluation of Sbi, Sci and... 

The first term on the right-hand side of Eq. (3.23) describes the input and output from the kth reactor, the second describes the increase in chain length due to propagation, the next two are responsible for the variation in the number of branching b and active centers i due to chain transfer, and two last terms describe the formation of short (1=1) linear (fo = 1) chains due to instantaneous initiation and chain transfer to solvent. In the general case, the temperature in different reactors can be varied therefore, the reactivities also bear index k. 

Universal at 100° F) and a viscosity index of 95. They contain necessary oxidation inhibitors and antiwear agents, as the same oil is used for bearings and gear lubrication. Oils tend to retain water, either from steam condensation or from condensation that occurs in the tanks. The presence of water is detrimental as it encourages the for-... 

Axial proximity probes are another means of monitoring rotor position and the integrity of the thrust bearing. A typical installation is shown in Figure 21-11. In this case two positions are being monitored one at the thrust runner, and one at the end of the shaft near the centerline. This method detects thrust-collar runout and also rotor movement. In most cases this ideal positioning of the probes is not possible. Many times the probes are indexed to the rotor or other convenient locations and thus do not truly show the movement of the rotor with respect to the thrust bearing. 

Numerous modifications to the bis(aryl)-a-diimine ligand motif have been reported, especially in the patent literature. The review by Ittel includes an index of diimine and related ligands in proprietary publications up to the year 2000 [26]. Instead, this discussion will focus on academic reports of Ni(II) and Pd(II) polymerization catalysts bearing a-diimine or other closely related chelating neutral nitrogen ligands. 

This group covers aromatic nuclei bearing one nitro group most mono-nitro benzenes can be persuaded to detonate by a tetryl booster few are an immediate danger in tbe absence of other sources of energy. Calorimetric studies [1] suggest tbat nitroaiyl compounds decompose by an autocatalytic mechanism, and thus stability may depend upon thermal history. Individually indexed compounds are ... 

Care is required with these compounds since many explode on heating [1], A number of triazene derivatives bearing hydrogen, or cyano, hydroxy or nitroso groups on the terminal nitrogen of the chain are unstable, mainly to heat [2], Purification of triazenes by vacuum sublimation carries the risk of explosion [3], Further examples of unstable triazenes and precautions are given [4,5], Individually indexed compounds are ... 

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