Date of Award
2019
Publisher
North Dakota State University
Document Type
Thesis
Degree Awarded
Master of Science (MS)
Program
Civil Engineering
Department
Civil and Environmental Engineering
College
Engineering
Faculty Advisor
Yang, Mijia
Description
Alkali silica reaction (ASR) is detrimental to concrete. It is a time-dependent phenomenon, which can lead to strength loss, cracking, volume expansion, and premature failure of concrete structures. In essence, it is a particular chemical reaction involving alkali hydroxides and reactive form of silica present within the concrete mix. Geopolymer is a type of alkaline activated binder synthesized through polycondensation reaction of geopolymeric precursor and alkali polysilicates. In this thesis, three types of reactive aggregates with different chemical compositions were used. Systematic laboratory experiments and microstructural analysis were carried out for the geopolymer concrete and the OPC concrete made with the same aggregates. The result suggests that the extent of ASR reaction due to the presence of three reactive aggregates in geopolymer concrete is substantially lower than that in OPC based concrete, which is explained by the pore solution change and verified through their microstructural variations and FTIR images.
Recommended Citation
Paudel, Shree Raj, "Pore Structure and Pore Solution in Alkali Activated Fly Ash Geopolymer Concrete and Its Effect on ASR of Aggregates with Wide Silicate Contents" (2019). Civil and Environmental Engineering. 93.
https://digitalcommons.ndsu.edu/civil-environmental-eng/93
Rights
NDSU policy 190.6.2
Rights Link
https://www.ndsu.edu/fileadmin/policy/190.pdf
Handle Identifier
https://hdl.handle.net/10365/31687