Clay and cereal fiber coating with waterproofing finishes for internal surfaces in the Mantaro valley

The article aimed to develop a clay finishing system to reduce labor, material, and additive costs in mortar plastering, using renewable raw materials with low energy consumption for homes in the Mantaro Valley, Peru. Clay samples were taken from two locations in the central highlands of Peru, and a house built with earth in the district of San Pedro de Saño was studied. Wheat, barley, and quinoa fiber, along with sand, were used in the mortar to improve its compressive and flexural strength. The process was divided into layers, and additives were added to make the clay waterproof and prevent deterioration from moisture. White clay showed the best results in ease of application and adherence to the wall. Findings include the viability of using local clay soils to reduce costs in earth homes, the reduction of surface cracks through the use of natural fibers, and the improvement of insulation against targeted moisture with waterproofing agents, representing an enhancement in finishes for rural homes in the central Andes of Peru.