【摘 要】
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The durability in terms of resistivity and transport properties of new eco-efficient mortars was investigated in this paper.The mortars were performed with eco-efficient blended cements that incorpora
【机 构】
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Institute of Construction Science “Eduardo Torroja”, Spanish National Research Council (CSIC), 28033
【出 处】
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The 14th International Congress on the Chemistry of Cement (
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The durability in terms of resistivity and transport properties of new eco-efficient mortars was investigated in this paper.The mortars were performed with eco-efficient blended cements that incorporate ashes from a fluidized bed forest biomass combustor as a partial substitute of Portland cement.The raw materials and mortars with partial substitution of Portland cement by biomass ash (BA) were analyzed by various techniques in previous works, which demonstrated its potential utilisation in cement-based materials.To complete the study on the viability to re-use this waste and reduce the consumption of Portland cement,properties as surface resistivity, permeability, diffusion and capillary absorption were studied in this paper.Mortar specimens with substitutions of 0, 10 and 20% of Portland cement by BA were employed with a water/binder and sand/binder ratio of 0.5 and 3, respectively.Compressive and flexural strengths were tested at 2, 7 and 28 days.Surface resistivity tests were performed by Wermer probe at different curing ages.Transport properties, such as the chloride diffusivity, oxygen permeability and capillary water absorption, were studied using mortar specimens after 28 days standard curing.The efficiency of new eco-efficient mortars was evaluated positively by the surface resistivity, chloride diffusion, oxygen permeability and capillary water absorption tests.The properties of new eco-efficient mortars have slight differences with the reference;substitution of 10% has the best performance.
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