شبيه سازي سايش بتن غلطكي در سازه هاي هيدروليكي (با كاربري روش پرتابش آب و ماسه )

Modeling RCCʹs abrasion in hydraulic structures (Using water - sand blasting Technique)

Recent developments in using unprotected roller compacted concrete (RCC) in hydraulic structures necessitates a trough investigation of the parameters affecting its abrasion resistance, particularly within the spillways. This paper covers deterministic aspects of RCCʹs abrasion resistance by means of the more influencing parameters such as specimens age, cement content and aggregates gradation, specific surface, compactness - which could be defined by a representative factor that can be called mean hydraulic radius. To ease laboratory observation on abrasion/erosion phenomena and for the sake of generalization, the water-sand blasting technique was employed in this investigation. Findings of a statistical analysis of the experimental data indicate that: A- RCCʹs abrasion resistance is a direct function of the compressive strength; B- by increasing aggregatesʹ mean hydraulic radius, abrasion resistance can be improved; C- the higher the cement content and age of specimens, the better will be abrasion resistance of RCC.