37º IAHS World Congress on Housing: - Universidad de Cantabria

XXXVII <strong>IAHS</strong><strong>World</strong> <strong>Congress</strong> on HousingOctober 26 – 29, 2010, Santander, SpainCODE: 140DURABLE CONCRETE WITH WASTE CRUSHED QUARRYSANDB. Menadi¹, S. Kenai¹, D. Djeziri¹¹Laboratory of Geomaterials MaterialsDepartment of Civil EngineeringUniversity of Blida, Algeriae-mail: bmenadi@yahoo.comKey words: concrete, waste, crushed sand, fines, permeability, durabilityAbstractNowadays crushed sand concrete with up to 18% of quarry limestone fines is widely used insome countries where river sand is lacking. The use of limestone fines can lower the cost,protect the environment from waste deposits and contribute to sustainable development ofconcrete. The effect of limestone fines content in crushed sand on the mechanical propertiesof mortar and concrete has been thoroughly investigated. However, little work has been doneso far on the durability properties of concrete containing limestone fines. This paperinvestigates the combined influence of crushed limestone fines and superlasticizer on thestrength and durability properties of 180-day moist-cured concretes made with 0, 5, 10, 15, 20and 25% of fines as sand replacement. The durability properties in this research work include,water permeability, gas permeability and chloride-ion penetration. Six mixtures were castwith a uniform cement content of 350 kg/m 3 , a constant water-cementitious material ratio(w/c) of 0.49 and a constant dosage of superplasticizer of 1.5% by weight of cement. Theresults indicate that the incorporation of limestone fines as portion of fine aggregate up to15% improved the resistance to chloride-ion penetration and reduces the water and gaspermeability and hence the durability properties are improved.37º <strong>IAHS</strong> <strong>World</strong> <strong>Congress</strong> On Housing Science 85