Compression and Flexural Strength of Compacted Adobes with the Addition of Cement, Gypsum and Lime in 2.5%, 5% and 7.5% (#846)

Authors

Alvarado Salazar, Jhonatan Abner

Marcelo Rodríguez, Gabriela Alexandra

Aguilar, Orlando

Abstract

The main objective of this research was to analyze the compressive and flexural strength of compacted adobes with the addition of cement, gypsum, and lime at proportions of 2.5%, 5%, and 7.5%, in relation to the study soil. The material was extracted from the "Cruz Blanca" quarry in Cajamarca, a region where the material is used in buildings. To achieve this objective, tests were carried out to determine the soil properties, modified Proctor, and axial and flexural strength tests. A quantitative approach was used, with a total of 160 adobes compacted with the CINVA RAM machine. The results showed that the compressive strength is influenced by the stabilizer used and the percentage added, increasing or decreasing the strength depending on the case. Compressive strengths of: 32.44 kg/cm2 for the control sample, for cement 10.96 kg/cm2, 14.39 kg/cm2, and 13.84 kg/cm2, for gypsum 25.49 kg/cm2, 42.13 kg/cm2, and 19.92 kg/cm2. Finally, for lime 31.87 kg/cm2, 33.79 kg/cm2, and 37.16 kg/cm2 in relation to 2.5%, 5%, and 7.5% of stabilizer respectively; exceeding, in all cases, the requirement of the E 080 standard. However, only two samples (with 5% gypsum and 7.5% lime) meet what was proposed in the hypothesis, being partially accepted.