Slump prediction

The slump (St) of latex-modified concrete can be predicted with every polymer type and at each sand-aggregate ratio by using slump control factor (q>) as follows ... 

By using the above-mentioned equations for slump and compressive strength predictions and nomographs for water-cement ratio and unit cement content estimations, an appropriate mix design system is proposed as represented in Fig. 3.4.I 1... 

Figure 1 Measured (top) and predicted (bottom) X-ray intensity distributions from a slumped, 320 1 MCP in beam expander mode at Cu-K (8.05 keV), left, and Mo-K (17.5 keV), right.

As ever, the difficulty for the industry is to balance capacity with expected demand, although the latter is extremely difficult to predict even 5 years ahead because it is so strongly affected by the world s economy which is very cyclical with a boom inevitably followed by a slump. The diversity of experts views clearly illustrates the difficulties. Views on ethylene in the mid 1990s range from predictions of significant over-capacity in Europe to a worldwide shortage. Clearly the actual outcome depends on how the market for this product expands (or contracts). 

Special measures of workability may be necessary when improved resistance to segregation is required for special reasons. Estimation by eye given by an experienced practitioner is also valid. The relation between Bingham model parameters and slump test results has been studied by Wallevik (2006) who has shown that the slump may be, to some extent, predicted from the yield... 

V. E. Denny and B. R. Sehgal, "Analytic Prediction of Core Heatup Liquefaction/Slumping," (Proc. Int. Mtg. on LWR Severe Accident Evaluation. Cambridge, MA, p5.4-l, 1983. 

Assuming this, MELCOR predicts two clearly differentiated periods in the behavior and transport of FP species through the RCS during the invessel phase of the accidents the first corresponds to the strong FP release directly from the fuel whereas the second is related to the revolatilization of the FP species from superficial deposits at the time when the core debris slumps into the lower plenum. 

Prins, H.-J., Braat, A.K., Gawlitta, D., Dhert, W.J.A., Egan, D.A., Tijssen-Slump, E., et al., 2014. In vitro induction of alkaline phosphatase levels predicts in vivo bone forming capacity of human bone marrow stromal cells. Stem Cell Res. 12, 428-440. http //dx.doi. org/10.1016/j.scr.2013.12.001. 

---