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Anionic and Cationic Surfactant Modified Acrylamide Grout
More widespread usage of acrylamide grouts demands further enhancement of the grout characteristics from the time of pumping to final setting. Surfactants have potential to be part of the polymerization process and also improve the wetting characteristic of the grouts. In this study the changes in the working and mechanical properties of an acrylamide chemical grout were investigated with the addition of an anionic surfactant and a cationic surfactant. Sodium dodecyl sulfate (SDS) and Cetyl trimethyl ammonium bromide (CTAB) were used as the anionic and cationic surfactants respectively. The surfactant content was varied from 0.5% to 4% of the weight of the total grout mix. Working properties such as viscosity, setting time and curing temperature of the grout were studied. The effect of initial temperatures of 40°F (4.4°C), 60°F (15.5°C) and 80°F (26.6°C) of the grout on the gelling time was also investigated. The influence of the surfactants on the pull-out strength and compressive strength of the grout and grouted sand were also investigated. Pullout tests were performed not only to determine the pullout strength and failure mode but also the sensitivity of the test to changes made in the grout mix. It was noted that the addition of surfactants did not significantly change the viscosity of the grout solution, however, the gelling time increased with the addition of CTAB at all initial temperatures. With the addition of SDS the gelling time decreased with the addition of SDS at 40°F (4.4°C) but increased at all other initial temperatures. The pullout strength of grout and grouted sand reduced with the addition of SDS and CTAB. Addition of CTAB and SDS increased the compressive strength of the grouted sand.
Anionic and Cationic Surfactant Modified Acrylamide Grout
More widespread usage of acrylamide grouts demands further enhancement of the grout characteristics from the time of pumping to final setting. Surfactants have potential to be part of the polymerization process and also improve the wetting characteristic of the grouts. In this study the changes in the working and mechanical properties of an acrylamide chemical grout were investigated with the addition of an anionic surfactant and a cationic surfactant. Sodium dodecyl sulfate (SDS) and Cetyl trimethyl ammonium bromide (CTAB) were used as the anionic and cationic surfactants respectively. The surfactant content was varied from 0.5% to 4% of the weight of the total grout mix. Working properties such as viscosity, setting time and curing temperature of the grout were studied. The effect of initial temperatures of 40°F (4.4°C), 60°F (15.5°C) and 80°F (26.6°C) of the grout on the gelling time was also investigated. The influence of the surfactants on the pull-out strength and compressive strength of the grout and grouted sand were also investigated. Pullout tests were performed not only to determine the pullout strength and failure mode but also the sensitivity of the test to changes made in the grout mix. It was noted that the addition of surfactants did not significantly change the viscosity of the grout solution, however, the gelling time increased with the addition of CTAB at all initial temperatures. With the addition of SDS the gelling time decreased with the addition of SDS at 40°F (4.4°C) but increased at all other initial temperatures. The pullout strength of grout and grouted sand reduced with the addition of SDS and CTAB. Addition of CTAB and SDS increased the compressive strength of the grouted sand.
Anionic and Cationic Surfactant Modified Acrylamide Grout
Vipulanandan, C. (author) / Sunder, Shiva (author) / Magill, Daniel (author)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 1819-1828
2012-08-17
Conference paper
Electronic Resource
English
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