The imperious need to determine the geotechnical properties of the cemented sands of the city of Asunción and to obtain a knowledge closer to reality of the behavior of these soils under load at its natural state, as well as the determination of the characteristics and factors that influence their behavior, leads to the need of performing in-situ load tests. New equipments were designed and built and procedures were established both for the performance of load tests as well as for the extraction of samples. A great deal of information was obtained and used to establish correlations between the values of in-situ strength and deformation of the cemented sands of Asunción in their natural condition and the results of the tests obtained in the laboratory.