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the enhancement of strength are limited to 14 days. Khatib and Wild [ 30 ] determined the pore structure and the intruded pore volume by conducting mercury intrusion porosimetry. Metakaolin in cement paste further refines the pore structure; the

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24 hours. Then the surface of the specimens was wiped out and the mass of each was measured. 2.3.4 Sorptivity test Sorptivity delivers a signal about the pore structure of the concrete and capillary. Low sorptivity means a dense concrete and ensures

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. [ 20 ] NS @0, 0.5, 1, 1.5, 2% for cement Ultra-high-strength concrete Pull out test, pore structure measurement, SEM, XRD, micro hardness

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micrographs, the pore structure and the pore morphology of the material can be assessed [ 9 ]. From Figs 4 and 5 it can be found that the black spots that are seen between the particles are the open pores present in the material. It is observed that, the

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