Flow table test

The initial plastic state of the fresh concrete when properties such as the workability as measured by slump or flow table test or air content can be determined by the relevant standard method. 

Because of the difficulty of measuring very high slumps reliably, it is common to use the flow table test specified in Dl N 1048 (1972 Section 1 Clause 3.1.2) for measuring workability of flowing concrete. Flowing concrete is defined as having a flow table spread of 51-62 cm. 

Table 12.2 Classes of consistence of concrete measured with slump test, vebe test, degree of compactability and flow table test [3]...

Flow Table Test. A test for the consistency of concrete in terms of its tendency to spread when placed on a... 

British Standards Institution (BSI). BS EN 12350-5 2000. Testing fresh concrete. Flow table test. BSI, London, 2000. 

There is also an additional conclusion that at least sometimes the flow table test can be used instead of the slump test to estimate the workability. Such a conclusion needs however further experimental corroboration. The obtained results are at least not contradictory to the only found recently published results of the flow-slump test dependence [7]. 

Walz flow table test (in the German DIN 1045 and 1048, and the European EN 206). This is basically a compaction test, best suited for mixes of medium workability [4,5]. In this simple test, a tall metal container (200 mm x 200 mm x 400 mm) is filled with concrete without compaction. The concrete is then compacted either by rodding or by vibration, and the degree of compaction is then calculated as the height of the container divided... 

A number of instmments are based on the extmsion principle, including sHt flow and normal capidary flow (Table 6). These instmments are useful when large numbers of quahty control or other melt viscosity test measurements are needed for batches of a single material or similar materials. When melt viscosities of a wide range of materials must be measured, rotational viscometers are preferable. Extmsion rheometers have been appHed to other materials with some success with adhesives and coatings (10,161). 

The range of application of shear cell testing methodology is seen in Tables 2-6. Table 3 relates the flow properties of mixtures of spray-dried lactose and bolted lactose. These mixtures, in combination with the excipients tested, cover a broad range of flow. Tables 4 and 5, for example, show lot to lot variations in the flow properties of several materials, and Table 6 shows the variation in flow properties of bolted starch, sucrose, and phenacetin at different relative humidities (RH). Figure 8 presents the yield loci of sucrose at four different consolidation loads. Also shown in the figure are the shear indices determined at each consolidation load. 

The validity of the data obtained with the batch reactor has been confirmed by continuous flow reactor tests. In Table II are shown comparative tests in the reactivity of the unpromoted Si02 catalyst by using batch and flow reactors at 600 and 650°C. The good agreement of these tests confirms the adequacy of our batch reactor approach. 

For the screening test phase, three replicate specimens of each combination of independent variables were made, and each of the indicator or control tests was run on the specimens of sulfur-asphalt concrete. These indicator tests (dependent variables) included bulk specific gravity, air voids, voids in the mineral aggregate (VMA), resilient modulus, Hveem stability, Marshall stability, and Marshall flow. Table II presents the range of dependent variables determined during the screening test for the AAS system mixtures. 

Spehar et al. [231] investigated the bioconcentration potential of hexachloro-norbornadiene and heptachloronorbornene using 30-day flow-through test with early juvenile fathead minnows Pimephales promelas) with a body weight of 0.12 g and 4% lipid content. The measured mean concentrations of hexa-chloronorbornadiene (HCND) in water was 20.0 3.9 pg and the water concentration of heptachloronorbornene (HepCNB) was 25.9 3.4 pg b. The bioconcentration factors on a wet weight basis after 30 days in this fish species were 6,400 and 11,200, respectively. The bio concentration factors on a lipid basis (BCFl) of HCND and HepCNB after 30 days were 160,000 and 280,000, respectively (see Table 13). 

The species in Table 3 were selected based on several criteria, primarily ease of culture, commercial availability, and size. The test species are acclimated for a specific period of time prior to testing to eliminate diseased organisms. Generally, a minimum of 10 animals are exposed in static and static-renewal tests and 20 in a flow-through test for each test concentration and control. The recommended loading... 

Pulmonary function tests Tilt-table testing TORCH test Tuberculin test Urine flow studies... 

Flow, Table 1 Chosen test cases for micro-/... 

Table 3. Median values and significance calculations (Wilcoxon test for paired samples) for transepidermal water loss and blood flow in test phase 1 - comparison of day 1 with day 19, day 5 with day 19, and day 12 with day 19...

TABLE 7—Mixed flowing gas test conditions for electronics corrosion. 

TABLE 8—Standards for mixed flowing gas tests and associated measurements. 

DIO Condition testing Static data domains discr. Data-flow notation Data-flow Tables, criteria Boolean expressions... 

The flow of the paste and concrete mixes was measured using a flow table (BS EN 12350-5 2000 [15]) and a slump test. 

ASTM International. C230/C230M-05 Standard specification for flow table for use in tests of hydraulic cement ASTM International, West Conshohocken (PA), 2003. 

Enstad and Maltby (1992) concluded, from a series of shear tests carried out by five different laboratories on the certified material, CRM 116, that reproducible flow function results can be obtained only with skilled and experienced operators. Harwood (1971) applied the technique of Jenike to evaluate the flow of a range of pharmaceutical powders and found that as size of the powder increased the flowability became more free flowing (Table 1.12). 

This means that polymer flammability decreases when LOI increases. This method is also used to test the efficiency of flame retardants, but it is necessary to mention the direction of gas flow while testing (i.e., if the gases are coming from above or below the burning sample) [11]. Relative flammabilities as determined by LOI do not always agree with results from other tests it is thus necessary to know these results for a good evaluation of the flammability of plastic materials. Table 12.2 shows that there is no direct relation between LOI and the enthalpy or heat content for some polymers. 

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