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6877740 
Journal Article 
Crystallized alkali-silica gel in concrete from the late 1890s 
Peterson, K; Gress, D; Van Dam, Tom; Sutter, L; , 
2006 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
1523-1532 
WOS:000240299100015 
The Elon Farnsworth Battery, a concrete structure completed in 1898, is in an advanced state of disrepair. To investigate the potential for rehabilitation, cores were extracted from the battery. Petrographic examination revealed abundant deposits of alkali silica reaction products in cracks associated with the quartz rich metasedimentary coarse aggregate. The products of the alkali silica reaction are variable in composition and morphology, including both amorphous and crystalline phases. The crystalline alkali silica reaction products are characterized by quantitative X-ray energy dispersive spectrometry (EDX) and X-ray diffraction (XRD). The broad extent of the reactivity is likely due to elevated alkali levels in the cements used. (C) 2006 Elsevier Ltd. All rights reserved. 
10th Euroseminar on Microscopy Applied to Building Materials 
Paisley, SCOTLAND