Abstract
The mixture of styreneic methyl copolymers (SMCs) normal temperature-modified asphalt and styrene-butadiene styrene block copolymer (SBS)-modified asphalt (SMCSBS) compound-modified asphalt was investigated in this study. The viscosity and temperature properties of compound modified asphalt (SMCSBS) were studied by Brookfield rotary viscosity test. Dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to test SMCSBS compound modified asphalt with different SMC additions. Finally, the microstructure and physicochemical properties of SMCSBS were evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), and the modification mechanism of the SMCSBS was studied. The results show that the viscosity of the compound-modified asphalt added with SMC is improved, which is conducive to improving its workability. With the increase of SMC content, the high-temperature performance of the compound modified asphalt firstly increases and then decreases with the increase of SMC content. When the content of SMC is 12%, its high-temperature performance is the best. Compared with SBS-modified asphalt, the SMCSBS has better low-temperature performance, and the creep stiffness S and creep rate m of the SMC with different content are better than that of SBS. Finally, the microcosmic characteristics show that the SMC can give full play to its characteristics and can be uniformly dispersed in SBS modified asphalt. SMC is essentially a surfactant, which can reduce the viscosity and construction temperature by changing the surface tension and surface free energy of asphalt molecules. The curing agent of epoxy resin is slowly cross-linked and cured after contacting with air to form a certain strength, thus improving the road performance of the asphalt mixture.
Highlights
IntroductionThe start of warm mix asphalt technology is attributed to Professor Ladis Csanyi from Iowa State University in the United States, who first invented the preparation method of foamed asphalt in 1956, by pressing steam into the asphalt to form foamed asphalt [1]
The high and low-temperature performance of SMCSBS should be studied in combination
Wavenumber/cm-1 while 12% SMCSBS viscosity is more sensitive to temperature changes, which is conducive to improving its workability
Summary
The start of warm mix asphalt technology is attributed to Professor Ladis Csanyi from Iowa State University in the United States, who first invented the preparation method of foamed asphalt in 1956, by pressing steam into the asphalt to form foamed asphalt [1]. In. 1968, Mobil Oil Company in Australia obtained the patent of Professor Csanyi’s foamed asphalt preparation technology and registered the patent in 1971 [2]. 1968, Mobil Oil Company in Australia obtained the patent of Professor Csanyi’s foamed asphalt preparation technology and registered the patent in 1971 [2] Since countries such as Australia, Germany, France, Norway, and Japan have joined other development projects [3,4]. Until 1995, warm mix asphalt (WMA) was jointly developed by Shell and
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