000004887 001__ 4887
000004887 005__ 20141119144602.0
000004887 04107 $$aeng
000004887 046__ $$k2002-06-02
000004887 100__ $$aPellinen, Terhi K.
000004887 24500 $$aASPHALT MIX MASTER CURVE CONSTRUCTION USING SIGMOIDAL FITTING FUNCTION WITH NON-LINEAR LEAST SQUARES OPTIMIZATION TECHNIQUE

000004887 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004887 260__ $$bColumbia University in the City of New York
000004887 506__ $$arestricted
000004887 520__ $$2eng$$aThis paper presents a new simplified method of constructing a master curve of asphalt mix using test data covering a large range of temperatures from -18°C to 55°C. It utilizes sigmoidal fitting function and compressive dynamic (complex) modulus test data obtained at matrix combination of different frequencies and test temperatures. In the master curve construction, the time temperature superposition was modeled two different ways. First, using known time-temperature superposition equations, and second shifting test data experimentally, i.e., not assuming any functional form for the time-temperature relationship. The master curve construction was done using an Excel spreadsheet with the Solver Function, which is a tool for performing optimization with non-linear least squares regression technique. The analysis of over sixty mixtures indicated that the experimental approach agreed the best with Arrhenius shifting equation, correlation coefficient R2 being 0.995. Also, the experimental shifting was most flexible, producing the best fit among the studied shifting equations due to the fact that it has the most degrees of freedom.

000004887 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004887 653__ $$aasphalt mix, master curve, shifting, sigmoidal

000004887 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004887 720__ $$aPellinen, Terhi K.$$iWitczak, Matthew W.$$iBonaquist, Ramon F.
000004887 8560_ $$ffischerc@itam.cas.cz
000004887 8564_ $$s215549$$uhttps://invenio.itam.cas.cz/record/4887/files/492.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004887 962__ $$r4594
000004887 980__ $$aPAPER