摘要
The purpose of this study is to analyze the behavior of mortars from the sands of Togo in order to optimize their traction resistance. 3660 4 cm × 4 cm × 16 cm test tubes of mortars are prepared from the sands of 20 extraction sites in Togo with variations in water and cement while keeping the water-cement ratio constant (<i>E</i>/<i>C</i> = 0.5). It emerges a quadratically increasing evolution of resistance in flexural at 28 days of age (<i>σ<sub>f</sub></i>) for cement-sand (<i>C</i>/<i>S</i>) and water-sand (<i>E</i>/<i>S</i>) ratios varying respectively by the interval [0.0370, 0.3580] to [0.1977, 0.5120] and [0.0185, 0.1792] to [0.0988, 0.2605]. The resistances become stationary beyond these values (<i>σ<sub>f</sub></i> ≈ 3.4750 MPa to 7.9010 MPa). For structures whose resistance in traction is desired, three formulas of sand mortars from Togo are therefore defined: rich mortars (<i>C</i>/<i>S</i> > 0.5120 and <i>E</i>/<i>S</i> > 0.2605), lean (<i>C</i>/<i>S</i> < 0.0370 and <i>E</i>/<i>S</i> < 0.0185) and normal (0.0370 < <i>C</i>/<i>S</i> < 0.5120 and 0.0185 < <i>E</i>/<i>S</i> < 0.2605).
The purpose of this study is to analyze the behavior of mortars from the sands of Togo in order to optimize their traction resistance. 3660 4 cm × 4 cm × 16 cm test tubes of mortars are prepared from the sands of 20 extraction sites in Togo with variations in water and cement while keeping the water-cement ratio constant (<i>E</i>/<i>C</i> = 0.5). It emerges a quadratically increasing evolution of resistance in flexural at 28 days of age (<i>σ<sub>f</sub></i>) for cement-sand (<i>C</i>/<i>S</i>) and water-sand (<i>E</i>/<i>S</i>) ratios varying respectively by the interval [0.0370, 0.3580] to [0.1977, 0.5120] and [0.0185, 0.1792] to [0.0988, 0.2605]. The resistances become stationary beyond these values (<i>σ<sub>f</sub></i> ≈ 3.4750 MPa to 7.9010 MPa). For structures whose resistance in traction is desired, three formulas of sand mortars from Togo are therefore defined: rich mortars (<i>C</i>/<i>S</i> > 0.5120 and <i>E</i>/<i>S</i> > 0.2605), lean (<i>C</i>/<i>S</i> < 0.0370 and <i>E</i>/<i>S</i> < 0.0185) and normal (0.0370 < <i>C</i>/<i>S</i> < 0.5120 and 0.0185 < <i>E</i>/<i>S</i> < 0.2605).
作者
Kossi Bolanigni Amey
Kossi Bolanigni Amey(Ecole Nationale Supérieure des Ingénieurs (ENSI) de l’Université de Lomé (UL), Lomé, Togo;Structure de Recherche et Devéloppement (ERDF) de l’Institut FORMATEC, Lomé, Togo)
