Mechanical Response of Portland Cement Mortars with added Expanded Polystyrene Spheres（EPS） under Accelerated Attack
W.Martinez Molina1C.Lara Gomez1E.M.Alonso Guzman1H.L.Chavez Garcia1F.M.Gonzalez Valdez1O.R.Flores Lica1A.A.Torres Acosta2W.Martinez Alonso3H.Hernandez Barrios4J.A.Bedolla Arroyo5
1. Department of Materials, Faculty of Civil Engineering University of San Nicolas de Hidalgo2. Mexican Transport Research Institute, Ministry of Communications and Transports3. Division of Civil and Geomatics Engineering, Faculty of Engineering, National Autonomous University of Mexico4. Department of Structures, Faculty of Civil Engineering University of San Nicolas de Hidalgo5. Faculty of Architecture, University of San Nicolas de Hidalgo
摘要：Mortars have many uses in construction: to lighten, sonic and thermal insulation, aesthetic purposes, to protect against environmental attack, repair, conservation, union masonry, etc.Mortar matrices may be Portland cement, lime, gypsum, clay and soil, asphalt or polymers.This work shows the result of the addition of areas of expanded polystyrene spheres（EPS） in three different percentages to the aggregate of a mixture of mortar.Physical and mechanical behaviour is evaluated to assess their behaviour under accelerated attack.The stone aggregate in the mortar was river sand; the cement used was ASTM C150 Type IV; the initial water-cement ratio by weight was 1.01 for each share; all blends met 105 ± 5% flow.The addition of polystyrene beads（EPS） replaced fine aggregate by 10%, 20% and 30% in each mixture.It was necessary to add a fluidizing agent in cases of adding expanded polystyrene spheres, since the fluidity of the mortar decreased.Destructive testing such as simple compression and accelerated attack took place; non-destructive testing included physical absorption as a percentage and specific gravity.It is concluded that the addition of expanded polystyrene improved resistance to chemical attack accelerated mortars and reduced the volume and weight, without detriment to the resistance.
2015 International Conference on Structural,Mechanical and Materials Engineering（ICSMME2015）