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This study focused on the properties of the cement asphalt emulsion (CA) mortar. The mixtures of the samples were fabricated and allowed them seven, fourteen and twenty eight days for curing before tested by compressive strength, three points flexural test, and indirect tensile strength to probe into their engineering properties. Hydraulic cement mortar samples used as control are analyzed for comparison. The test results show that the compressive strength is hydraulic cement mortar greater than CA mortar; the flexural strength at curing of 28 days is CA mortar greater than hydraulic cement mortar, however, at curing of 7 and 14 days is hydraulic cement mortar greater than CA mortar; and the indirect tensile strength is hydraulic cement mortar greater than CA mortar. The Scanning Electron Microscope (SEM) analysis results show that the Ca (OH2) increased with increases curing time. The CA mortar samples fabricated needs appropriate water for lubrication. Thus, the water absorption of fine aggregate must be concerned. The emulsion asphalt added too much may reduce the strength. In field test, the CA mortar performs very well, especially in workability.

Th e magnitude 7.6 Chi-Chi Taiwan in 1999 and the magnitude 7.9 Sichuan China in 2008 earthquakes caused many building damage and collapse, and a large amount of waste concrete caused many environmental problems. Th is study evaluates crushed waste concrete used as aggregate for stone mastic asphalt. On the basis of this study, the ANOVA of the permanent deformation test shows that the type of aggregate has a signifi cant eff ect at test temperature of 60 °C, but not signifi cantly aff ect at 25 °C. Th us, the ability of permanent deformation resistance of the crushed waste concrete mixture is better than that of 100% virgin crush stone mixture. Th e stability values of the crushed waste concrete mixtures are higher than the 100% crush stone mixture, especially in 50% crushed waste concrete plus 50% crush stone and coarse crush stone plus fi ne crushed waste concrete (C-crush stone plus F-crushed waste concrete). Th e stone mastic asphalt mixed with 50% crushed waste concrete plus 50% crush stone are more practicable for use than others.