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Showing 1 to 9 of 9 for “"sulfate attack"”.
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Sulfate attack on cement paste with volcanic ash : durability analysis
Sulfate attack is responsible for deterioration of infrastructure and often occurs in sulfate rich soil or brackish environment. The aim of this study is to investigate the effect of volcanic ash cements when exposed to different forms of sulfate attack, specifically to sodium and magnesium …
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Accelerating the thaumasite form of sulfate attack and an investigation of its effects on skin friction
… was to accelerate the thaumasite form of sulfate attack (TSA) under laboratory conditions in order to identify its effects on skin friction at the soil/concrete interface. The experimental programme was organised into five series which investigated the formation of TSA under unrestrained …
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Durability studies of high performance concrete used for bridge decks
… test, freeze-thaw/salt scaling test and physical sulfate attack test.;Results and relationships between the results were discussed. Some conclusions were reached and some recommendations were made.
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Cementitious stabilization of soils in the presence of sulfate
… Accelerated Loading Facility site), free of any sulfate minerals, to distinguish the effect of internal and external sulfates. The Winn Rock gravel partially weathered in the soil to gypsum which was detected in all size fractions. The highest amount of expansion occurred in Winn Rock soil …
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Nondestructive damage characterization of concrete and concrete-steel composites using contactless ultrasonic scanning
… cycles, alkali-silica reaction (ASR) and sulfate attack. Prolonged and repeated exposure to the mechanisms can lead to the initiation of surface and internal damage that grows during the remaining service life of structure unless appropriately repaired. To repair and retrofit damaged …
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Effect of Surface Moisture Condition on Substrate-Repair Concrete Overlay Transition Zone
… freezing and thawing, chloride intrusion, sulfate attack, alkali-silica reaction, and many others. Given the age and condition of American infrastructure, concrete structures throughout the country need repair or rehabilitation. Often this repair includes the removal of degraded or damaged …
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Influences on durability and leaching behaviour of concrete: new technologies in fly ash production
… found to have similar levels of durability for sulfate attack, abrasion and carbonation. High alkali concrete (following the BS 812-123 method) gave similar expansion levels and good resistance with respect to AAR. With air-entrainment, it was found that the fly ash concretes required high doses …
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Use of end-of-waste foamed fibers and aggregates into a cementitious mortar
… materials to resist weathering action, chemical attack, abrasion or any other process of deterioration. The use of fibers is a viable solution to partially overcome the brittle behavior of such materials. At the same time it is demonstrated that fibers, by reducing cracking phenomena, allow to …