Awarie Budowlane 2007 - Streszczenie

In the last decade, the progressive deterioration of relatively new portland cement concrete pavements was observed in several locations in Indiana. This deterioration took a form of cracking and spalling localized in the upper part of the pavement, typically around the bottom of the saw cut groove. In order to investigate the cause of this deterioration, 36 of 150-mm diameter cores were extracted from four different pavements. Although the obtained specimens were subjected to various tests, this paper only contains the results of air void system analysis, as the ultimate mode of failure appeared to be freeze-thaw related. The results indicate that even though some of these concretes might have had satisfactory air-void system at the time of placement, its effectiveness became compromised over time by combined effects of water and salt ingress (formation of ettringite and Friedel’s salt).

Awarie Budowlane 2007 Streszczenie referatu
Premature deterioration of joints in selected Indiana portland cement concrete pavements Przedwczesne zniszczenie szczelin dylatacyjnych betonowych nawierzchni w Stanie Indiana
Prof. Jan OLEK, olek@purdue.edu Mateusz RADLIŃSKI, matrad@purdue.edu Maria DEL MAR ARRIBAS, marribas@purdue.edu School of Civil Engineering, Purdue University, 550 Stadium Mall Dr., West Lafayette, 47907 IN, U.S.A
Streszczenie
Abstract	In the last decade, the progressive deterioration of relatively new portland cement concrete pavements was observed in several locations in Indiana. This deterioration took a form of cracking and spalling localized in the upper part of the pavement, typically around the bottom of the saw cut groove. In order to investigate the cause of this deterioration, 36 of 150-mm diameter cores were extracted from four different pavements. Although the obtained specimens were subjected to various tests, this paper only contains the results of air void system analysis, as the ultimate mode of failure appeared to be freeze-thaw related. The results indicate that even though some of these concretes might have had satisfactory air-void system at the time of placement, its effectiveness became compromised over time by combined effects of water and salt ingress (formation of ettringite and Friedel’s salt).

Awarie Budowlane 2007 Streszczenie referatu

Awarie Budowlane 2007
Streszczenie referatu