Journal ArticleDOI
Microscopic analysis of alkali–aggregate reaction products in a 50-year-old concrete
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TLDR
In this paper, a 50-year-old concrete from a large dam was examined in the scope of an investigation program concerning the properties of granite as aggregate material for concrete, which revealed the existence of efflorescence and exudations.About:
This article is published in Materials Characterization.The article was published on 2004-11-01. It has received 49 citations till now. The article focuses on the topics: Alkali–silica reaction & Alkali–aggregate reaction.read more
Citations
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Journal ArticleDOI
Alkali-silica reactions (ASR): literature review on parameters influencing laboratory performance testing
TL;DR: In this paper, the authors discuss which parameters must be considered to be able to develop reliable ASR performance testing methods and provide some tentative recommendations, including the internal humidity in the test specimens, the extent of alkali leaching and the storage temperature.
Journal ArticleDOI
Lattice Discrete Particle Modeling (LDPM) of Alkali Silica Reaction (ASR) deterioration of concrete structures
TL;DR: In this paper, the authors implemented the ASR effect within the framework of the Lattice Discrete Particle Model (LDPM), which simulates concrete heterogeneous character at the scale of coarse aggregate pieces.
Journal ArticleDOI
Modeling of alkali-silica reaction in concrete:a review
TL;DR: A comprehensive review of modeling of alkali-silica reaction (ASR) in concrete is presented in this article, which includes theoretical approaches, meso-and macroscopic models for ASR analysis.
Journal ArticleDOI
Crystallized alkali-silica gel in concrete from the late 1890s
TL;DR: In this paper, the Elon Farnsworth Battery, a concrete structure completed in 1898, is in an advanced state of disrepair, and cores were extracted from the battery to investigate the potential for rehabilitation.
Journal ArticleDOI
Composition of alkali-silica reaction products at different locations within concrete structures
TL;DR: In this paper, four concrete structures from Northern Portugal (three dams and one bridge) were studied using petrographic techniques, in which signs of deterioration were identified in order to confirm that the deterioration was caused by alkali-silica reactions.
References
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Book
Lea's chemistry of cement and concrete
P. C. Hewlett,F. M. Lea +1 more
TL;DR: The history of calcareous cements and Portland cements can be found in this paper, where the structure and cementing qualities of cement compounds the constitution of Portland cement, the burning of Portland Cement, the hydration of PortlandCement, resistance of concrete to natural destructive agencies physical and mechanical properties of Portland cement pozzolanas and pozzolanic cements cements made from blast furnace slag high alumina cement some special cements, and cement properties cement admixtures concrete aggregates.
MonographDOI
Alkali-silica reaction in concrete
TL;DR: In this paper, the reaction, cracking and pessimum behaviour effect of mix proportion and constituents upon expansion effect of applied stress upon the mechanical properties structural effects and implications and repair diagnosis GGBS, PFA and silica fume testing aggregates and cement aggregate combinations for their reactivity minimizing the risk of expansion in new construction.
Book
Concrete Petrography: A Handbook of Investigative Techniques
Alan B. Poole,Ian Sims +1 more
TL;DR: In this paper, the authors present a detailed overview of concrete petrographic examination techniques and their application in the inspection and in situ testing of structures, including the analysis of light using the polarising microscope, fluorescence microscopy, Fourier transform infrared microscopy (FT-IR), phase contrast and related techniques.
Journal ArticleDOI
Quantitative microanalyses of alkali-silica gel in concrete
T. Knudsen,N. Thaulow +1 more
TL;DR: In this paper, a combination of scanning electron microscope, energy dispersive X-ray spectrometer and computer, quantitative analyses of microvolumes of alkali-silica gel at the reaction site and in cracks in concrete were carried out.
Journal ArticleDOI
Simultaneous presence of alkali — silica gel and ettringite in concrete
V. Johansen,N. Thaulow,J. Skalny +2 more
TL;DR: The simultaneous presence of alkali and ettringite in concrete has been reported by several authors as mentioned in this paper, however, the proposed interpretations of this phenomenon, and its relationship to concret...