Mechanical Properties and Microcosmic Mechanism of Cement Modified Asphalt Emulsion Concrete

Abstract:

A study was made of the mechanical properties of ordinary Portland cement modified asphalt emulsion concrete,including compressive strength and compressive modulus,flexural strength and flexural modulus.Bases on infrared spectroscopy analysis,X ray diffraction analysis and scan electron microscopy,an investigation was made into the microstructure characteristics of cement asphalt emulsion mastic and concrete interface.The results show that all mechanical properties of asphalt emulsion concrete improve significantly,when the cement increases.There is no obvious chemical reaction between cement and asphalt emulsion in cement asphalt emulsion mastic,and cement can hydrate with the watery phase of asphalt emlusion.The hydrate products of cement in asphalt emulsion are similar to those in water.The cement asphalt mastic,which is physical compoud mastic by netlike hydrate products and asphalt,improves the adherence of binder aggregation and mechanical properties of asphalt emulsion concrete.