A comparison of flexural strengths of polymer (SBR and PVA) modified, roller compacted concrete
This brief article aims to reveal the flexural performance, including the equivalent flexural strength of PVA (Polyvinyl Alcohol) modified concrete by comparing it primarily with that of SBR (Styrene Butadiene Rubber) concrete. This data article is directly related to Karadelis and Lin [6].
Cracking analysis of induced joints in roller compacted concrete arch dam
Abstract Induced joint is seen as a kind of crack prevention measure for roller compacted concrete arch dam. Whether induced joints can crack firstly when the temperature drops of dam body to release temperature stress and control disordered cracks mainly depends on the equivalent strength, structural form and arrangement of joints. In this paper, the non-penetrating RCC induced joints are used to simulate the bilateralism interval induced joints in practical engineering. The functional relation between the equivalent strength of rectangular induced joints and elliptical induced joints with the change of weakening degree is established through the axial tension test. At the same time, the temperature stress of a certain RCC double curvature arch dam is simulated, and the cracking of induced joints and its effect on the stress of the dam are analyzed. The results show that under the temperature control measures of pouring temperature control and water cooling in the whole dam, the bilateralism interval induced joints with equivalent strength less than 1.409 MPa are set in the high tension stress zone of the dam body, which can effectively release the temperature stress and ensure the safety of the dam body under the temperature load.
Predicting the Flexural Postcracking Performance of Steel Fiber Reinforced Concrete from the Pullout of Single Fibers
A model based on simple principles of mechanics is proposed to predict the flexural toughness of steel fiber reinforced concrete (SFRC), having the experimental pullout force-versus-slip relationships of single fibers at different inclination angles and the compressive strength of the matrix as the only two input parameters. The model is shown to be in good agreement with experimental results from tests on SFRC in terms of average response and kinematics of the failure mode. In addition, a reliability analysis has been incorporated in the model allowing for the prediction not only of the average expected response but also of its variability. This study of the stochastic nature of the process is also shown to agree well with the experiments and those reported in the literature in terms of the expected variability in the flexural toughness testing.