Pastes of Plaster with Latex of Euphorbia Tirucalli: Evaluation of Plasticity, Water Absorption, Compressive Strength and Durability

The aim of this paper is to present the results of the addition of latex of Euphorbia tirucalli, known as Aveloz in improving the properties of fresh plaster pastes with respect to increased plasticity, and to investigate the changes on their hardened state. In the methodology, set tests were performed for compressive strength, water absorption and durability. Two rates were fixed water / gypsum, 40% and 50% water over the mass of gypsum with a percentage point latex addition of between 1% and 5%. The addition of latex showed good results in increasing the resistance to compression, decreasing absorption and increasing the durability of specimens subjected to a jet of water to simulate rainfall of 600 mm /m2.hours at a speed of 10 m/s. In their fresh state, the pastes had enough plasticity to molding with manual compression.