Automated foam index test: Quantifying air entraining agent addition and interactions with fly ash–cement admixtures

Stencel, J.M.; Song, Haiping; Cangialosi, Federico

doi:10.1016/j.cemconres.2009.01.010

Cited by 30 publications

(13 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The air entraining agents used in this study were DH-9 and SJ-2 (trademark), and their main chemical components were resin soap and triterpenoid saponin [4], respectively. Note: The symbol, *, demonstrates that the content of SJ-2 or DH-9 is changing along with the requirements of design, and that the content of water-reducing agent is determined when the slump of fresh concrete reaches at 90mm~110mm.…”

Section: Experimentalsmentioning

confidence: 99%

The Flexural Strength and Frost Resistance of Air Entrained Concrete

Zheng

Yuan

et al. 2012

AEF

View full text Add to dashboard Cite

Abstract. The flexural strength and frost resistance properties of air entrained concrete were tested in this study. Although the flexural strength of concrete does not change largely with increasing of air content, it still has a maximum value with air content of 4%. The test results show that the frost resistance increases with increasing of air content which makes the space parameter decreasing in the harden concrete. In air entrained concrete, the total air content is not the only factor that affect the final properties of the concrete, the air void structure parameters, including void size, shape, and distribution, are key factors as well. It was found that the air void structure and the frost resistance properties were influenced by the vibration time largely. The optimized vibration time is 30s.

show abstract

Section: Experimentalsmentioning

confidence: 99%

The Flexural Strength and Frost Resistance of Air Entrained Concrete

Zheng

Yuan

et al. 2012

AEF

View full text Add to dashboard Cite

show abstract

“…Researchers have noted the need for adjusting solution concentrations depending on the AEA and CFA being tested (Meininger, 1981;Gebler and Klieger, 1983;Dodson, 1990;Freeman et al, 1997;Külaots et al, 1998Külaots et al, , 2003Külaots et al, , 2004Separation Technologies, 2000;Zacarias, 2000;Baltrus and LeCount, 2001;Gurupira, 2005;FHWA, 2006;Grace Construction Pro ducts, 2006;Harris et al, 2008aHarris et al, , 2008bHarris et al, , 2008cStencel et al, 2009). Adjusting the solution concentration to match the adsorption characteristics of the ash improves the test in areas other than reproducibility because using a relatively low concentration solution with a highly adsorbent CFA requires numerous additions of AEA, which increases human error and lengthens the testing time.…”

Section: Optimum Test Durationmentioning

confidence: 99%

Methods for Evaluating Fly Ash for Use in Highway Concrete

Sutter¹,

Hooton²,

Schlorholtz³

2013

View full text Add to dashboard Cite

Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Often, highway problems are of local interest and can best be studied by highway departments individually or in cooperation with their state universities and others. However, the accelerating growth of highway transportation develops increasingly complex problems of wide interest to highway authorities. These problems are best studied through a coordinated program of cooperative research. In recognition of these needs, the highway administrators of the American Association of State Highway and Transportation Officials initiated in 1962 an objective national highway research program employing modern scientific techniques. This program is supported on a continuing basis by funds from participating member states of the Association and it receives the full cooperation and support of the Federal Highway Administration, United States Department of Transportation. The Transportation Research Board of the National Academies was requested by the Association to administer the research program because of the Board's recognized objectivity and understanding of modern research practices. The Board is uniquely suited for this purpose as it maintains an extensive committee structure from which authorities on any highway transportation subject may be drawn; it possesses avenues of communications and cooperation with federal, state and local governmental agencies, universities, and industry; its relationship to the National Research Council is an insurance of objectivity; it maintains a full-time research correlation staff of specialists in highway transportation matters to bring the findings of research directly to those who are in a position to use them. The program is developed on the basis of research needs identified by chief administrators of the highway and transportation departments and by committees of AASHTO. Each year, specific areas of research needs to be included in the program are proposed to the National Research Council and the Board by the American Association of State Highway and Transportation Officials. Research projects to fulfill these needs are defined by the Board, and qualified research agencies are selected from those that have submitted proposals. Administration and surveillance of research contracts are the responsibilities of the National Research Council and the Transportation Research Board. The needs for highway research are many, and the National Cooperative Highway Research Program can make significant contributions to the solution of highway transportation problems of mutual concern to many responsible groups. The program, however, is intended to complement rather than to substitute for or duplicate other highway research programs.

show abstract

“…The many forms and procedures of the foam index test have been used to evaluate the relative performance of fly ash and AEAs in concrete, with various levels of success. ,,,− Unlike LOI, the foam index test results are affected by the adsorptive properties of the fly ash. Therefore, the foam index results could provide adsorption information not provided by the LOI test.…”

Section: Introductionmentioning

confidence: 99%

Direct Adsorption Isotherms of AEAs and Fly Ash: α-Olefin Sulfonate and Combination Admixtures

Ahmed

Hand

2015

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The direct adsorption isotherm test provides a direct measurement of the air entraining admixtures (AEAs) adsorption by fly ash in concrete. This method was developed and tested using a popular Vinsol resin admixture. In this paper, the direct adsorption isotherm test was performed on two other commonly used AEAs of different chemical compositions to verify the applicability of this method to AEAs of other chemical natures. The results showed that, as in the case of the Vinsol resin admixture, the AEAs partitioned between the solid and liquid phase, the partitioning coefficient changed with changing the AEA concentration, and this method was able to quantify the fly ash adsorption capacity based on the Fruendlich adsorption model. Also, in order to present a practically useful approach for the concrete/fly ash industry, the isotherms results of the three AEAs were correlated to the fly ash iodine number test results. Concrete producers can use these correlations to determine the AEA adsorption capacity, and the AEA dosage adjustment using the fly ash iodine number without the need to perform the direct adsorption isotherm test.

show abstract

Automated foam index test: Quantifying air entraining agent addition and interactions with fly ash–cement admixtures

Cited by 30 publications

References 13 publications

The Flexural Strength and Frost Resistance of Air Entrained Concrete

The Flexural Strength and Frost Resistance of Air Entrained Concrete

Methods for Evaluating Fly Ash for Use in Highway Concrete

Direct Adsorption Isotherms of AEAs and Fly Ash: α-Olefin Sulfonate and Combination Admixtures

Contact Info

Product

Resources

About