The effect of blending granular aggregates of different origin on the strength of concrete |
| |
Authors: | M.E. Mé diciO.A. Benegas,R.O. Uñ acA.M. Vidales |
| |
Affiliation: | a INFAP-CONICET, Departamento de Minería, Facultad de Ciencias Físico Matemáticas y Naturales, Universidad Nacional de San Luis, Chacabuco 917, D5700HHW, San Luis, Argentinab INFAP-CONICET, Departamento de Física, Facultad de Ciencias Físico Matemáticas y Naturales, Universidad Nacional de San Luis, Ejército de los Andes 950, D5700HHW, San Luis, Argentina |
| |
Abstract: | This work correlates the resistance of concrete cores with the physical properties of the granular material forming it. A basic physical characterization is conducted, taking into account the origin of the grains involved in the concrete mixture; that is, if they come from natural degradation (natural granular aggregates) or from a grinding process (crushed granular aggregates). Apparent and real densities, shape factors, packing densities, and specific surface areas of the grains are measured. The results are discussed as a function of size and origin of the grains. Several mixtures are prepared following a standard protocol and using different ratios of natural and crushed aggregates. For each ratio, six cores are prepared and uniaxial compression tests are performed. A non-monotonic relation between the resistance of concrete and the percentage of crushed aggregate present in it is obtained, with an optimum ratio depending on the physical properties of the grains. |
| |
Keywords: | Granular aggregates Packing density Concrete |
本文献已被 ScienceDirect 等数据库收录! |
|