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Błędy realizacji prac remontowych przyczyną uszkodzeń wilgotnościowych zabytkowego budynku Sali BHP w Gdańsku

Niedostatkiewicz Maciej

Builder

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2021

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R.25, nr 9

48--51

PL

Przyczynami uszkodzeń i usterek obiektów budowlanych mogą być błędy projektowe, wykonawcze, jak również niewłaściwy sposób eksploatacji oraz przyczyny losowe. Dysfunkcje użytkowe w postaci uszkodzeń wilgotnościowych są bardzo często trudniejsze i znacznie kosztowniejsze do usunięcia niż ograniczenia eksploatacyjne powstałe w wyniku usterek czy uszkodzeń elementów konstrukcyjnych. W przypadku części obiektów zabytkowych trafne rozpoznanie przyczyny występujących uszkodzeń wynika z braku możliwości wykonania niezbędnej ilości odkrywek. W artykule przedstawiono opis uszkodzeń wilgotnościowych występujących w historycznym budynku Sali BHP w Gdańsku po zakończeniu prac związanych z jego remontem oraz opisano zakres podjętych prac naprawczych.

EN

The causes of damage and failures of buildings can be imperfections and errors in design and workmanship, as well as improper operation and random causes. Usable dysfunctions in the form of moisture damage are very often more difficult and much more expensive to remove than operational limitations resulting from defects and damage to structural elements. In the case of some historic buildings, the correct diagnosis of the cause of the damage is due to the inability to make the necessary number of opencasts. The article presents a description of moisture damage occurring in the historic building of the Health and Safety Hall in Gdańsk after the completion of works related to its renovation and the scope of repair works.

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Effects of Hydrated Lime on Moisture Susceptibility of Asphalt Concrete

Al-Marafi Mohammad Nour Ibrahim

Advances in Science and Technology. Research Journal

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2021

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Vol. 15, no 2

13--17

EN

Moisture damage is one of the most critical distresses affecting asphalt pavement. The use of mineral fillers such as hydrated lime can increase the moisture resistance of the asphalt mixtures. In this study, the effects of hydrated lime (HL) and nano hydrated lime (NHL) were investigated on the moisture susceptibility of modified asphalt mixtures. The asphalt mixtures were modified using HL and NHL with varying percentages of each additive. The indirect tensile strength (ITS) test was performed to investigate moisture susceptibility. This test was carried out with three types of asphalt mixtures including, normal asphalt mixture without additives, modified asphalt mixture with HL, and modified with NHL. The results showed that the addition of HL and NHL as mineral fillers enhanced the performance of the mixtures against moisture damage. The highest increase in ITS value under dry conditions was observed in the modified mixtures with 20% HL and 20% NHL, and under wet conditions it was observed at 30% HL and 20% NHL. The results also indicated that the addition of 20% HL and 30% NHL increased the value of tensile strength ratio (TSR) by 78.6% and 70.6%, respectively.

3

Evaluation of hot-mix asphalt containing Portland cement treated blast furnace slag

Rondón-Quintana H. A., Ruge-Cardenas J. C., Bastidas-Martínez J. G.

Archives of Civil Engineering

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2019

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Vol. 65, nr 2

193--207

EN

Iron production’s waste materials include significant quantities of blast furnace slag (BFS) which could potentially be used as a substitute for natural aggregates in hot mix asphalt (HMA) used in highway projects. Although many of properties of slag are interesting, its porosity and absorption rate would lead to greater consumption of asphalt. For this study, a Portland cement (PC) paste was used to reduce the porosity of a BFS. This PC treated BFS (called BFS-C) was then used in an HMA to replace the coarse fraction of a natural aggregate. Marshall, Indirect Tensile Strength (ITS), resilient modulus and Cantabro tests were then carried out on different HMA mixtures that included BFS-C. Using BFS-C, HMA’s resistance under monotonic loading, stiffness under cyclic loading, and resistance to moisture damage increased remarkably. In addition, the Cantabro abrasion resistance of BFS-C improved was better than that of the HMA mixture produced with untreated BFS.