Search
Now showing items 21-30 of 39
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 ...
Recommendations for coarse aggregate testing requirements for use in portland cement concrete
(2013-12)
Coarse aggregate is often one of the largest volume occupying components in a portland cement concrete system. With increases in transportation costs and depletion of many of the aggregate sources currently in use the ...
Evaluation of crack depth in concrete using non-contact surface wave transmission measurement
(2011-05)
The purpose of this study is to develop a non-contact air-coupled NDT method to identify and characterize surface-breaking cracks in concrete structures using surface wave transmission measurements. It has been found that ...
Model of strain-related prestress losses in pretensioned simply supported bridge girders
(2014-05)
Prestressed concrete construction relies on the application of compressive stresses to concrete elements. The prestressing force is typically applied through the tensioning of strands that react against the concrete and ...
Designing for deck stress over precast panels in negative moment regions
(2017-10-27)
One of the leading causes of structural deficiencies in the United States Bridge Inventory is related to deterioration and durability problems with concrete bridge decks (NCHRP 2004). The primary issue with bridge decks ...
The relationship between composition, structure, and solubility in sodium aluminosilicate hydrates
(2017-09-19)
This work seeks to identify the fundamental precursor-to-product composition relationships by which inorganic polymer binders (IPBs) derive their chemical structure and to link that chemical structure to their engineering ...
Seismic retrofit of RC columns with FRP composites and anchorage system
(2015-05)
Research on the use of composite materials in structural applications started more than 30 years ago but still remains active. The challenges that accompany those applications are diverse and seem to increase as the variety ...
Evaluating natural pozzolans for use as alternative supplementary cementitious materials in concrete
(2014-12)
Concerns over the future availability of traditional SCM sources, such as fly ash, have left the concrete industry in need of alternative sources of SCMs. The research presented here has evaluated natural pozzolans such ...
Characterization of fly ash for evaluating the alkali-silica reaction resistance of concrete
(2012-12)
Fly ash has been used extensively to control deleterious alkali-silica reaction in concrete. The majority of fly ashes can be used to control ASR induced expansion. Fly ashes with high CaO contents are less effective at ...
Use of manufactured sands for concrete paving
(2011-08)
Manufactured fine aggregates are a product created when rocks are crushed using a mechanical crusher. With the depletion of sources of natural sands, the usage of manufactured fine aggregates has increased. Manufactured ...