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Effects of low-level silica fume replacement in ASTM C 1260 and ASTM C 227 mortar-bar testing
(2004-12-18)
Replacement of a percentage of cement by supplementary cementing materials (SCM) can control deleterious alkali-silica reaction. Silica fume, a commonly used SCM, and can be used to mitigate alkali-silica reaction (ASR). ...
Nondestructive evaluation of reinforced concrete structures affected by alkali-silica reaction and delayed ettringite formation
(2011-08)
Alkali-silica reaction (ASR) and delayed ettringite formation (DEF) deterioration have been a problem for the concrete infrastructure in the state of Texas and around the world in recent decades. A great deal of research ...
ASR/DEF-damaged bent caps: shear tests and field implications
(2009-12)
Over the last decade, a number of reinforced concrete bent caps within Houston, Texas have exhibited premature concrete damage (cracking, spalling and a loss of material strength) due to alkali-silica reaction (ASR) and/or ...
Experimental investigation of ASR/DEF-induced reinforcing bar fracture
(2011-12)
Numerous cases of premature concrete deterioration due to alkali-silica reaction and/or delayed ettringite formation have developed within highway infrastructure in the state of Texas over the past two decades. Although ...
Structural performance of ASR/DEF damaged prestressed concrete trapezoidal box beams with dapped ends
(2010-08)
Across the State of Texas and many other areas of the world, relatively young concrete structures have developed signs of premature concrete deterioration. Large cracks form on the surface of the concrete due to expansive ...
An investigation of means of mitigating alkali-silica reaction in hardened concrete
(2013-05)
This research project, funded by the Federal Highway Administration (FHWA Project DTFH61-02-C-0097), focuses mainly on alkali-silica reaction (ASR) and techniques to mitigate the effects of alkali-silica reaction in hardened ...
Experimental studies of the behavior of 'pessimum' aggregates in different test procedures used to evaluate the alkali reactivity of aggregates in concrete
(2012-05)
Alkali-silica reaction (ASR) is a common deterioration mechanism responsible for numerous concrete durability issues. Since ASR was first discovered in the 1940's, a significant number of investigations have been carried ...