Investigation of Effective Parameters on Compressive Strength, Specific Electrical Resistance and Water Absorption of Lightweight Pervious Concrete
Subject Areas : Analysis of Structure and Earthquake
shahriar gholamin noveirsar
1
(Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran)
مرتضی جمشیدی
2
(گروه عمران دانشگاه آزاد چالوس)
رحمت مدندوست
3
(دانشکده فنی و مهندسی گروه عمران دانشگاه گیلان)
Keywords: lightweight pervious concrete, Specific electrical resistance, compressive strength, water absorption Energy dissipation modes,
Abstract :
Pervious concrete is a special type of lightweight concrete with low or even zero slump, which consists of cement, coarse aggregate, a limited percentage of fine aggregate (or no fine aggregate), various chemical and pozzolanic additives. In this article, structural LECA with a volumetric weight of 750 kg/m3 and a fixed water-to-cement ratio (W/C = 0.3) was used to make lightweight pervious concrete and the effect of different ratios of lightweight aggregate to cement (A/C) including 1.5, 1.8, 2.1, 2.4, 2.7, 3, total porosity and volume percentage of cement paste on compressive strength , specific electrical resistance and percentage of water absorption of lightweight pervious concrete aged 28 days were investigated. With the increase of A/C ratio from 1.5 to 3, the volume of cement paste decreased from 30.873% to 15.436% in the samples and the total porosity increased from 21.64% to 38.08%, which led to a decrease Specific electrical resistance decreased from 11.45 to 6.841 , compressive strength decreased from 13.27 MPa to 4.37 MPa, and water absorption increased from 11.185% to 12.695% in lightweight pervious concrete samples. The results of this research showed the improvement of physical properties and the decrease of mechanical properties and durability of lightweight pervious concrete containing LECA.
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