rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: A
    title: New Performance-Based Approach of ASR Aggregate Reactivity Prediction and Development of ASR-Resistant Concrete Mix
  name:
    name part: Liu, Kai-Wei
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Zollinger, Dan G.
    name part: 1952-
    role:
      role term: thesis advisor.
  name:
    name part: Mukhopadhyay, Anal K.
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2015
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: The main objective of this study is to develop a rapid, reliable test method to determine the aggregate reactivity due to alkali-silica reaction (ASR) with respect to the overall alkalinity of the concrete. A volumetric change measurement device (VCMD) developed at the Texas A&M Transportation Institute was used in this research. The VCMD simulates the aggregate-pore solution reaction in concrete and measures free solution volume contraction due to ASR over time. The solution volume change over time at multiple temperatures was modeled to determine ASR compound activation energy (CAE) based on the Arrhenius equation. The CAE-based test can reliably predict aggregate alkali silica reactivity in a short period of time (5 days) in terms of measuring CAE. A representative CAE can be determined by testing as-received aggregates (i.e., field aggregates) with 0.5N NaOH (NH) + Ca(OH)2 (CH) solution (similar to concrete pore solution) and with permissible repeatability. A CAE-based aggregate classification system is developed, which can serve as a potential screening parameter in an aggregate quality control program. A relationship between CAE and alkalinity is also developed, which became the basis to determine threshold alkalinity (THA). The proposed method has the potential to be considered as an alternative method to the current ASR test methods (e.g., accelerated mortar bar test (AMBT)). An effective way of tailoring ASR mix design depending on the level of protection needed is developed based on CAE, THA, pore solution alkalinity (PSA), and concrete validation testing. An accelerated concrete cylinder test (ACCT) using VCMD at 60°C is developed with no involvement of errors due to operation and temperature change along with arresting alkali leaching to test concrete mixes in a short time. Composite spherical and finite element modeling where relevant gel properties and free strain of ASR are the main inputs were developed for prediction of the measured linear ACCT expa…
  note: by Kai-Wei Liu.
  note: "Major Subject: Civil Engineering"
  note: Includes vita.
  note: Doctor of Philosophy Texas A & M University 2015 http://hdl.handle.net/1969.1/155009
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major civil engineering
  subject:
    topic: Alkali-Silica Reaction
  subject:
    topic: Compound Activation Energy
  identifier: http://hdl.handle.net/1969.1/155009
  record info:
    record content source: TXA
    record creation date: 160226
    record change date: 20170928111952.0
    record identifier: in00003610264
    language of cataloging:
      language term: eng