Non–destructive Acoustic Testing of High-temperature Degraded Composite Cementations Materials Containing Rubber Aggregates and Ethylen Vinyl Acetate Polymer Binder

článek ve sborníku ve WoS nebo Scopus

angličtina

The use of impact-echo acoustic method to test cement-based mortar composites modified with rubber aggregates and EVA polymer binder and degraded at high temperatures was studied. The specimens were prepared by using a type CEM I Portland cement and siliceous sand, as well as by substituting 25% of sand with shredded automobile tires and by adding EVA polymer binder (10% w/w to cement mass). The specimens were subjected to high temperatures (200-400 degrees of Celsius). The results of non-destructive testing confirmed the different structure of mortar specimens. The partial substitution of sand with rubber aggregates led to absorption of lower frequencies as compared to the reference specimens. A significant decrease of the absorbed freaThe use of impact-echo acoustic method to test cement-based mortar composites modified with rubber aggregates and EVA polymer binder and degraded at high temperatures was studied. The specimens were prepared by using a type CEM I Portland cement and siliceous sand, as well as by substituting 25% of sand with shredded automobile tires and by adding EVA polymer binder (10% w/w to cement mass). The specimens were subjected to high temperatures (200-400 degrees of Celsius). The results of non-destructive testing confirmed the different structure of mortar specimens. The partial substitution of sand with rubber aggregates led to absorption of lower frequencies as compared to the reference specimens. A significant decrease of the absorbed frequencies was observed, depending on temperature. The largest decrease occurred after the specimens exposure at 200-300 degrees of Celsius. The effect of heat exposure to the decrease of frequencies was mitigated when the EVA polymer was used.uencies was observed, depending on temperature. The largest decrease occurred after the specimens exposure at 200-300 degrees of Celsius. The effect of heat exposure to the decrease of frequencies was mitigated when the EVA polymer was used.

Impact-echo, mortar, EVA polymer, rubber aggregates, high-temperature degradation

ŠTEFKOVÁ, D.; TUPÝ, M.; SOTIRIADIS, K.; TIMČAKOVÁ, K.; CHOBOLA, Z.

2014

12. 8. 2014

Trans Tech Publications

Schwitzerland

978-3-03835-188-7

International Conference on Ecology and New Building Materials and Products

2014

1022-6680

Advanced Materials Research

2014

1000

Švýcarská konfederace

334

338

5

http://www.scientific.net/AMR.1000.334