[ Building & Construction ]
[ Building & Construction ]
Material Diameter [ d ] ( mm ) Concrete Temperature (° C )
B500S
ACX 915
12 – 16 C25 / 30
20
200
400
600
Figure 2 . Adhesion test specimens after exposure to high temperatures . Self manufactured .
Figure 3 . Execution of specimens for adhesion tests at the UJI facilities .
Table I . List of parameters
Returning to the subject of adhesion , the late 1970s and early 1980s marked the initiation of experiments on adhesion at elevated temperatures . These experiments employed pull-out tests adapted for high temperatures or conducted pull-out tests postexposure to temperatures reaching up to 800 ° C . These tests [ 8 – 10 ] covered smooth , corrugated , and drawn steel reinforcements , revealing a more pronounced loss of adhesion for smooth bars and a loss of adhesion of a similar magnitude to the reduction in compressive or tensile strength
F of concrete for corrugated bars . However , to date , no known study has explored the adhesion of stainless steel reinforcements affected by high temperatures . Therefore , the CECOM research group at Universitat Jaume I in Castellón , through the GVA research project ( CIGE / 2021 / 116 ) led by Professor V . Albero [ 11 ] , presents the first prospective study on this aspect .
Valuable study results This study could prove valuable for expert assessments and decisions regarding repairs or demolitions occurrence of fires , it is essential to recognize it as a crucial design scenario for various structural systems . Indeed , all national and international standards related to structural calculations incorporate diverse specifications in this context . Additionally , emphasizing the substantial economic impact associated with this hazard is crucial . As per recent reports from the Spanish Insurance Association ( UNESPA ) [ 7 ] , from July 2020 to June 2021 , 5.16 % of the 73,000 registered fires occurred in the industrial sector . These incidents accounted for the most significant economic impact , averaging approximately € 50,000 per event . Notably , these statistics point to an average of about ten industrial fires daily in Spain , resulting in a daily economic loss of € 500,000 . This considerable loss is attributed to the typical intensity of industrial fires , associated with significant economic consequences and related to the high combustible load usually present in such establishments . Any efforts to enhance structural fire resistance can yield positive outcomes in alleviating these substantial economic impacts .
∆ 0
∆1
Figure 4 . Pull-out test set-up .
36 Stainless Steel World April 2024 www . stainless-steel-world . net