Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

摘要: Abstract Due to desirable thermal insulation properties, superior fire-resistant and higher durability, ultra-lightweight foam concretes are recommended achieve energy efficiency in buildings. Generally, aluminate cement, sulphoaluminate cement other quick hardening cementitious materials used control the stability of air-voids concretes. These special relatively expensive not universally available, retarding application popularization In present study, proportioning properties Portland cement-based concrete were investigated. The results show that with apparent density 100–300 kg/m 3 can be prepared using fly ash, hydrogen peroxide chemical admixtures. Collapse escape avoided by adding thickening agent stabilizing emulsion into Most pores non-connected size 2.0–4.0 mm, resulting a lower conductivity, compressive tensile strengths.