Surcface texture

Bond between aggregates particles and cement paste is greatly dependent on the surface texture of the aggregates paticles . Roughness of surface and surface porosity of the aggregate particles ar the main elements on which bond depends . An aggregate with rough surface will have a better bond than with a smooth surface aggregate . Similarly an aggregates with account of suction of cement paste into these pores . Surface of the aggregate as per IS : 383 -1963 may be glassy , smooth , granular , crystalline or honey combed . Aggregate having glassy surface should not be used . All other types of surfaces exhibit good bond .