Preparation and Properties of Early Strength and Low Shrinkage ECC Thin Layer Repair Materials
In this paper,aiming at the problems of poor toughness of traditional thin layer repair materials and large dry shrinkage and high vis-cosity of engineered cementitious composites(ECC),the effects of sulphoaluminate cement-silicate cement-silica fume compound,hybrid steel-PVA fiber and retarding early strength component compound on the working performance,mechanical properties and dry shrinkage of ECC were studied.The thin layer repair materials of airport cement concrete pavement with initial fluidity>200 mm,4 h compressive strength>40 MPa,60 d dry shrinkage<1.0×10-4,toughness index I20>20 and excellent service performance were developed.
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