A Comparative Study on the Effects of Three Nano-Materials on the Properties of Cement-Based Composites.

Materials (Basel) · 2020 · PMC7079641 · PMID 32070022

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a decreasing trendno p-value reported

The highest flexural strength shows a decreasing trend of NCC > CNTs > nano-SiO 2 at both 7 d and 28 d, and the intensity of the CNTs group changes with the dosage is larger than that of the nano-SiO 2 and NCC groups.

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an overall trendno p-value reported

The water absorption rate ranking of the CNTs group is 0.1% < 0.01% < 0% < 0.5% < 2% < 3%, an overall trend which is the opposite of the compressive strength one, indicating that CNTs also have a good filling effect on the internal pores of mortar specimens.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.