Abstract
The objective of this study is to determine the influence of the surrounding soils on the granular properties of the silty sands of Togo and on the resistance of the mortars. Sand compositions are made by substituting silty sands with clay soil, vegetal soil, lateritic soil or fine elements (ES = 0, VBM > 0.53 and IP > 19) from 10% to 35% cause drops in resistance of mortars from 7% to 96%; this loss is 8% to 70% for the rates of addition of less clayey soil (ES = 33, VBM = 0.40 and IP = 0) at rates of 10% to 100%. As for fine powdery soils (ES = 56.53 and VBM = 0.25), they have virtually no influence on resistance (loss of less than 3% for rates of 100%). Construction stakeholders thus have a decision-making tool for the choice of silty sand extraction zones according to the surrounding land and the quality of the desired concrete.
Highlights
In Africa and in Togo, the material most used in the construction of civil engineering works is concrete which is composed of water, binder and aggregates
Sand compositions are made by substituting silty sands with clay soil, vegetal soil, lateritic soil or fine elements (
Since silty sands are continental sands, they are subject to pollution from other surrounding materials
Summary
In Africa and in Togo, the material most used in the construction of civil engineering works is concrete which is composed of water, binder and aggregates. The most used sands in Togo are sea sands, river sands, resulting from rock crushing and continental dunes. For reasons of coastal erosion, by interministerial decree N 031/MME/MERF of 5 May 2011, the Togolese state had pro-. In the coastal zone as well as in the interior of Togo, the sands are collected in the extraction quarries
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