Feasibility test and evaluation models to develop sustainable insulation concrete using foam and bottom ash aggregates

The present study aims to examine the limitation and significance to develop sustainable lightweight concrete using bottom ash aggregates and preformed foam (LWC-BF). As a positive action for sustainability, ordinary Portland cement (OPC) was replaced by using 50% ground-granulated blast-furnace slag (GGBS) and 20% fly ash (FA), and bottom ash particles were used for entire replacement of natural fine and coarse aggregates. To improve the thermal resistance of concrete, preformed foam was added at the maximum volume fraction of 25%. The test parameters investigated included unit binder content, foam volume fraction, and curing temperature. The different mechanical properties and thermal conductivity for LWC-BF were formulated from the regression analysis using test data. Additionally, the measured compressive strength, thermal conductivity, and air-dried density of LWC-BF were compared with the requirements for precast concrete (PC) insulation panel. Thus, a reliable mixture proportioning for the application to the PC insulation panel could be recommended with the use of unit binder content of 500 kg/m(3) and foam volume fraction ranging from 10% to 25%. (C) 2019 Elsevier Ltd. All rights reserved.