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The V-funnel shall be made from metal; the surfaces shall be smooth, and not be readily attacked by cement paste or be liable to rusting.
Allow the filled cone to stand for not more than 30s; during this time remove any spilled concrete from the base plate and ensure the base plate is damp all over but without any surplus water (Figure 2).In this study the area has been covered is making the design mix of self-compacted concrete and it’s performance – economic comparisons with prevailing conventional grade of concrete of M-40 grade.Self-compacting concrete (SCC) was first developed in Japan, in the early nineties of the previous century, under the stimulating leadership of Prof. The main idea behind self-compacting concrete was, that such a concrete is robust and relatively insensitive to bad workmanship.During recent years self-compacting concrete developed to research item nr. A large number of research projects were carried out, followed by recommendations for potential users.Especially for the precast concrete industry self-compacting concrete was a revolutionary step forward.
Then measure the diameter of the flow spread at right angles to the nearest 10 mm and record as to the nearest 10 mm. The cement paste/mortar may segregate from the coarse aggregate to give a ring of paste/mortar extending several millimetres beyond the coarse aggregate.