Title: CRACKING AND EDGE-LOADING EFFECTS ON STRESSES AND DEFLECTIONS IN A SOIL-CEMENT PAVEMENT
Abstract: TWO 8 1/2-IN. THICK PANELS OF STIFF SOIL-CEMENT BASE WERE CONSTRUCTED ON A SOFT CLAY SUBGRADE, AND ONE OF THEM WAS LOADED TO CRACK. BOTH PAVEMENTS WERE THEN TESTED IN REPEATED LOADING, UNSURFACED AND SURFACED WITH 1, 3, AND 5 IN. OF ASPHALT CONCRETE. DEFLECTIONS, STRESSES, AND STRAINS UNDER LOADING WERE RECORDED AND COMPARED. VERTICAL DEFLECTIONS WERE GREATER BY ABOUT 20 PERCENT, AND SUBGRADE STRESSES DIRECTLY UNDER THE LOAD WERE GREATER BY AT LEAST 50 PERCENT IN THE CRACKED SECTION THAN IN THE UNCRACKED PAVEMENT. CRACKING HAD A LARGE INFLUENCE ON HORIZONTAL STRAINS NEAR THE CRACK IN THE BASE BUT HAD ONLY A SMALL INFLUENCE ON STRAINS IN THE ASPHALT CONCRETE SURFACING. A SAW-CUT WAS MADE THROUGH THE UNCRACKED PAVEMENT SURFACED WITH 5 IN. OF ASPHALT CONCRETE, AND REPEATED PLATE-LOAD TESTS WERE DONE WITH THE PLATE CENTER 24 AND 8 IN. FROM THE CUT. LOADING AT 24 IN. HAD NEGLIGIBLE EFFECTS ON VERTICAL DEFLECTIONS BUT INCREASED SUBGRADE STRESSES NEAR THE CUT BY ABOUT 40 PERCENT. LOADING AT 8 IN. INCREASED VERTICAL DEFLECTIONS BY AT LEAST 60 PERCENT AND SUBGRADE STRESSES NEAR THE CUT BY ABOUT 100 PERCENT. LABORATORY-DETERMINED VALUES FOR THE ELASTIC PROPERTIES OF THE CLAY, THE SOIL CEMENT, AND THE ASPHALT CONCRETE AND THE VARIOUS ASSUMED LOADING CONDITIONS WERE USED AS INPUT FOR COMPUTER PREDICTIONS OF STRESSES AND DEFLECTIONS. VERY SATISFACTORY AGREEMENT WAS OBTAIN BETWEEN THE PREDICTED AND MEASURED STRESSES AND DEFLECTIONS. /AUTHOR/
Publication Year: 1972
Publication Date: 1972-01-01
Language: en
Type: article
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