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Investigation of the mechanical and durability properties ...

The mechanical tests were performed to specimens previously heated during either 3 or 24 h at each of six temperatures in the range 100–225 °C. The mechanical characterization included axial and transverse tensile experiments, axial compression, and non-destructive dynamic tests to determine the dynamic flexural modulus (DFM).

(PDF) Ettringite-induced heave in chromite ore processing ...

Environ. Sci. Technol. 2006, 40, 5786-5792 Ettringite-Induced Heave in Chromite extensive investigation was undertaken to characterize SA7 COPR and to design and implement an on-site treatment to Ore Processing Residue (COPR) address both the Cr(VI) hazard reduction while simulta- neously mitigating the COPR heaving phenomena. upon Ferrous Sulfate Treatment The on-site remediation of Cr(VI ...

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Risk analysis of the delayed ettringite formation in pile caps foundation in the metropolitan region of Recife - PE - Brasil ... is an awareness that is critical to assess the durability characteristics of concrete with as much attention as the mechanical properties. The durability of concrete structures can often be affected by chemical ...

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2020-3-1 · The nominal composition of the concrete dosages are shown in Table 2.The w/c ratio remained constant in the 4 mixtures because several studies refer to the influence of the modification of this parameter on the expansion performance [].Thus, in order to avoid any influence of the w/c ratio in the obtained results and to ensure that the magnitude and rate of the expansion were only conditioned ...

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Concrete, the single most widely used material in the world, is a complex heterogeneous material that exhibits different mechanical properties at separate length scales (Constantinides and Ulm 2007; Bernard et al. 2003).Cement paste is the binder and key ingredient of concrete and a hierarchical material itself, with three different levels spanning the range from a few nanometers to hundreds ...

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2019-10-11 · equipment. Seek further advice on the correct method to achieve this from the screed manufacturer. ... provide an additional mechanical key to aid further adhesion. 0 10 20 30 40 50 60 70 80 30 40 60 80 60mm 50mm 40mm ... In reality, the risk of an adverse chemical reaction (ettringite attack) with Calcium Sulfate is reduced

BRE

Find the most up-to-date version of Delayed ettringite formation: in-situ concrete at Engineering360.

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2020-3-1 · The determination of the mineralogical composition of the raw materials and the evolution of the crystalline phases of the manufactured SCC''s was carried out at the hydration ages of 1, 3, 7 and 28 days by X-ray diffraction-XRD analyses, using a Bruker ADVANCE D8 diffraction equipment whose X-ray tube is a 2.2 kW copper anode, working in Bragg ...

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