University of Wisconsin – Milwaukee
The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete.
Degree: PhD, Engineering, 2019, University of Wisconsin – Milwaukee
Today, building a durable and cost-efficient infrastructure while minimizing future repair needs is a challenging task, and innovative technological breakthroughs are needed. Limited research has been conducted to investigate the use of portland cement (PC) to improve the performance of asphalt pavements. Portland cement in bitumen materials is attractive as it can improve the performance and reduce costs. Warm Mix Asphalt (WMA) is also an attractive alternative to Hot Mix Asphalt (HMA) as this material produces tremendous energy savings by lowering the production temperatures and enhances certain performance characteristics. It can be envisioned that the use of portland cement incorporated into an asphalt matrix can result in a hybrid product with enhanced long-term performance (especially in wet environments) characterized by better salt-scaling, freeze-thaw resistance, and self-healing properties (thermally-induced and moisture-induced). This study explores the interactions and compatibility of different types of portland cements with bitumen binders and identifies the potential improvement of performance in WMA portland cement hybrid systems. The objectives of this research were to identify and characterize 5 portland cements used as reactive powders compounds: Lafarge Type I (LF), St. Mary Type I (SM), Buzzi Unicem CSA (CSA), Lafarge Oil Well (OW), and Kerneos High Alumina (HA), 1 Weston spray dryer absorber (SDA), and 1 Payne & Dolan control limestone filler (LS) and determine how these materials were compatible with asphalt binders. The effect of the chemical properties, physical properties, and mineralogical composition of all powders performance of mastics based on different asphalt binders is discussed. The powders were mixed with asphalt binders (PG58-28 and PG52-34) at 0, 5, 15, 25% concentration by volume with a variable blade speed mixer and these mixtures were modified with a Warm Mix Asphalt (WMA) additive (Evotherm by Ingevity®). Rheological properties were investigated using a Dynamic Shear Rheometer (DSR). Complex Shear Modulus (G*) and Phase Angle () parameters were obtained for the mastics (binders with fillers). It was demonstrated that the addition of powders at 15% and higher dosages significantly affected the stiffness. Performance related indicators were determined for viscosity using the Brookfield Rotational Viscometer and rutting (G*/sin(δ)), Multiple Stress Creep and Recovery (Jnr and % Recovery), fatigue (G*sin(δ)), and aging resistance (aging index) using the DSR. Thermal cracking (S(t) and m-value) was evaluated at low temperatures with the Bending Beam Rheometer. All reactive powder (cement based) and SDA mastics were compared to control limestone mastics. LF mastics were comparable to the control for rutting resistance but enhanced the low-temperature performance. SM mastics were also comparable for rutting resistance and comparable for low-temperature evaluations. CSA mastics enhanced the rutting resistance, aging resistance, and low-temperature thermal cracking…
Advisors/Committee Members: Konstantin Sobolev.
Subjects/Keywords: asphalt; portland cement; reactive powder; self healing; spray dryer absorber; warm mix asphalt; Civil Engineering; Materials Science and Engineering
to Zotero / EndNote / Reference
APA (6th Edition):
Cloutier, C. (2019). The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete. (Doctoral Dissertation). University of Wisconsin – Milwaukee. Retrieved from https://dc.uwm.edu/etd/2054
Chicago Manual of Style (16th Edition):
Cloutier, Clayton. “The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete.” 2019. Doctoral Dissertation, University of Wisconsin – Milwaukee. Accessed November 18, 2019.
MLA Handbook (7th Edition):
Cloutier, Clayton. “The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete.” 2019. Web. 18 Nov 2019.
Cloutier C. The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete. [Internet] [Doctoral dissertation]. University of Wisconsin – Milwaukee; 2019. [cited 2019 Nov 18].
Available from: https://dc.uwm.edu/etd/2054.
Council of Science Editors:
Cloutier C. The Effective Use of Portland Cement in Reactive Powder Hybrid Asphalt Concrete. [Doctoral Dissertation]. University of Wisconsin – Milwaukee; 2019. Available from: https://dc.uwm.edu/etd/2054