Yield surfaces and loading surfaces of aluminum and brass: An experimental investigation at room and elevated temperatures

<p>The use of post‐installed rebars into existing reinforced concrete structures bonded with epoxy resins was constantly increasing due to the advantage of equivalent or even higher bearing capacities at service temperature, compared with conventional cast‐in‐place rebars. Previous studies have examined the effects of different parameters on the mechanical properties of bonded post‐installed rebars at normal temperature. These studies showed that, for rebar diameter equal to 10 mm, the load bearing capacity increases linearly with the embedment length up to 75 mm. However, upon exposure to high temperatures, the glass transition of epoxy resins may occur and affect the mechanical behaviour of the adhesive bond. Studying the mechanical behaviour of an adhesive anchor at high temperatures is therefore necessary. An experimental investigation is conducted herein to examine the characteristics of the adhesive bonding stress between steel rebar and concrete interface at elevated temperatures using a series of pull‐out tests with varying rebar diameters and embedment lengths.</p>

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Experimental investigation of square stainless steel tubular stub columns after elevated temperatures

Journal of Constructional Steel Research ◽

10.1016/j.jcsr.2019.05.008 ◽

2019 ◽

Vol 159 ◽

pp. 397-414 ◽

Cited By ~ 3

Author(s):

Kang He ◽

Yu Chen ◽

Shaohua Han

Keyword(s):

Experimental Investigation ◽

Stainless Steel ◽

Elevated Temperatures ◽

Stub Columns

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The Fabrication of Geopolymer Foam Composites Incorporating Coke Dust Waste

Processes ◽

10.3390/pr8091052 ◽

2020 ◽

Vol 8 (9) ◽

pp. 1052

Author(s):

Buczkowska Katarzyna ◽

Chi Hiep Le ◽

Petr Louda ◽

Szczypiński Michał ◽

Totka Bakalova ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Experimental Investigation ◽

Residual Strength ◽

Elevated Temperatures ◽

Composite Foam ◽

Coke Dust ◽

Composite Foams ◽

Negative Effect ◽

Geopolymer Binder

This paper reports the results of an experimental investigation on the mechanical properties of geopolymer foams incorporating filler from the coke dust waste (CDW). In this work, CDW was used to replace a part of geopolymer paste at 5%, 10%, 20%, and 30% by geopolymer binder mass. The physico-mechanical properties and thermal resistance against high temperatures of CDW/geopolymer foams are presented. The primary results obtained show that the use of CDW in the production of geopolymer foam composites made it possible for them to achieve relatively good mechanical properties. However, the incorporation of the CDW into the geopolymer had a slightly negative effect on thermal conductivity, but significantly improved the mechanical strength of the final product. Moreover, this waste also helped the composite foam to achieve a structure with more uniform open pores distribution, compared to the pure foam. After exposure to elevated temperatures, the residual strength of the composite foams maintained well compared to the pure foams.

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