Die chemische Beständigkeit eines Steinschutzstoffes auf Polyurethanbasis in der künstlichen Bewitterung

Hagenauer, Michael; Gerhard‐Abozari, Eva; Höcker, Hartwig

doi:10.1002/apmc.1997.052460112

Cited by 6 publications

(2 citation statements)

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“…A similar result was also reported in the study by Qi et al [64]. On the contrary, the durability study on the concrete with recycled polymer concrete is still limited and the knowledge gap needs to be filled, especially polyurethane polymer-based composites [65,66].…”

Section: Introductionsupporting

confidence: 83%

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Zhao

Guo

et al. 2020

Materials

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Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer concrete aggregate is still limited. This study aims to fill this knowledge gap through the experimental investigation on mechanical and durability performance. Specifically, the remolded polyurethane stabilized Pisha sandstone was collected as the recycled polymer concrete aggregate. The remolded Pisha sandstone was then applied to re-prepare the polyurethane-based composites. After that, the mechanical performance of the prepared composites was first examined with unconfined and triaxial compressive tests. The results indicated that the Pisha sandstone reduces the composite’s compressive strength. The reduction is caused by the remained polyurethane material on the surface of the remolded aggregate, which reduces its bond strength with the new polyurethane material. Aiming at this issue, this study applied the ethylene-vinyl acetate (EVA) to enhance the bond performance between the polyurethane and remolded sandstone. The test results indicated both the unconfined and triaxle compressive strength of the polyurethane composites were enhanced with the added EVA content. Furthermore, the durability performance of the EVA-modified composites were examined through freeze-thaw and wet-dry cycle tests. The test results indicated the EVA could enhance the polyurethane composites’ resistance to both wet-dry and freeze-thaw cycles. Overall, the modification with EVA can compensate for the strength loss of polyurethane composites because of the applied remolded aggregate and enhance its sustainability.

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Section: Introductionsupporting

confidence: 83%

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Zhao

Guo

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…X-ray photoelectron spectroscopy, XPS, 16,22,59,79,96,119,142,157,199,306,[354][355][356][357][358][359][360][361][362][363][364][365][366][367][368] also called "electron spectroscopy for chemical applications", ESCA, is a relatively new method in its applications to weathering studies but it has become one of the most frequently used methods. With it, quantitative analysis of oxygen, carbon, and nitrogen, and any heavier element available on the surface is possible.…”

Section: X-ray Photoelectron Spectroscopy Xpsmentioning

confidence: 99%