TY - JOUR
T1 - Mechanical performance of rubberized cement paste with calcium sulfoaluminate cement addition
AU - Damiani, Robbie M.
AU - Mondal, Paramita
AU - Lange, David A.
N1 - Funding Information:
The authors would like to thank Christine Cosip for the aid in designing and fabricating half-shape dumbbell rubber samples for pullout testing. Thermogravimetric analysis and scanning electron microscopy were carried out in part in the Materials Research Laboratory Central Research Facilities, University of Illinois . The work was partially funded by The Birmingham–Illinois Partnership for Discovery, Engagement, and Education (BRIDGE) through a project titled “Improving damping and dynamic resistance in concrete through micro- and nano-engineering for sustainable and environmental-friendly applications in railway and other civil construction.”
Funding Information:
The authors would like to thank Christine Cosip for the aid in designing and fabricating half-shape dumbbell rubber samples for pullout testing. Thermogravimetric analysis and scanning electron microscopy were carried out in part in the Materials Research Laboratory Central Research Facilities, University of Illinois. The work was partially funded by The Birmingham–Illinois Partnership for Discovery, Engagement, and Education (BRIDGE) through a project titled “Improving damping and dynamic resistance in concrete through micro- and nano-engineering for sustainable and environmental-friendly applications in railway and other civil construction.”
Publisher Copyright:
© 2020
PY - 2021/1/10
Y1 - 2021/1/10
N2 - Due to an increasing amount of waste tires produced yearly, environmental concerns arise as waste tires in landfills pose both a fire hazard, and a habitat for rodents and mosquitos. As a result, the reuse of waste tires in the form of waste rubber in concrete has been attempted. Previous research work has shown that the inclusion of waste rubber in concrete results in a drastic decrease in compressive strength. The limitations regarding the use of rubberized concrete are related to the interfacial transition zone between rubber and paste. Due to mismatch in free surface energy between rubber and cement paste, an interfacial gap is often reported to be present. This investigation aims to determine the effect of expansive cement, specifically calcium sulfoaluminate cement (CSA), has on the performance on rubberized cement samples, and its effect on the interfacial transition zone. A comprehensive experimental plan was carried out including pullout and compressive tests, scanning electron microscopy (SEM) imaging of fractured surface, and non-destructive tests through resonant frequency and dynamic mechanical analysis (DMA); furthermore, a temperature sweep via DMA was done to determine damping factor as a function of temperature. Results from compressive strength indicate a marked increase in the performance of rubberized samples with expansive cement. Pullout results, dynamic modulus and damping ratio values, shrinkage measurements, and scanning electron microscopy (SEM) imaging validate the hypothesis that a decreased interfacial gap at the rubber-paste interface obtained from using expansive cement results in increased mechanical performance.
AB - Due to an increasing amount of waste tires produced yearly, environmental concerns arise as waste tires in landfills pose both a fire hazard, and a habitat for rodents and mosquitos. As a result, the reuse of waste tires in the form of waste rubber in concrete has been attempted. Previous research work has shown that the inclusion of waste rubber in concrete results in a drastic decrease in compressive strength. The limitations regarding the use of rubberized concrete are related to the interfacial transition zone between rubber and paste. Due to mismatch in free surface energy between rubber and cement paste, an interfacial gap is often reported to be present. This investigation aims to determine the effect of expansive cement, specifically calcium sulfoaluminate cement (CSA), has on the performance on rubberized cement samples, and its effect on the interfacial transition zone. A comprehensive experimental plan was carried out including pullout and compressive tests, scanning electron microscopy (SEM) imaging of fractured surface, and non-destructive tests through resonant frequency and dynamic mechanical analysis (DMA); furthermore, a temperature sweep via DMA was done to determine damping factor as a function of temperature. Results from compressive strength indicate a marked increase in the performance of rubberized samples with expansive cement. Pullout results, dynamic modulus and damping ratio values, shrinkage measurements, and scanning electron microscopy (SEM) imaging validate the hypothesis that a decreased interfacial gap at the rubber-paste interface obtained from using expansive cement results in increased mechanical performance.
KW - Calcium sulfoaluminate cement
KW - Dynamic properties
KW - Mechanical properties
KW - Rubberized cement
KW - Waste tire rubber
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U2 - 10.1016/j.conbuildmat.2020.120790
DO - 10.1016/j.conbuildmat.2020.120790
M3 - Article
AN - SCOPUS:85092221726
SN - 0950-0618
VL - 266
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 120790
ER -