Foamed alumina was previously synthesised by direct foaming of sulphate salt blends varying ammonium mole fraction (AMF), foaming heating rate and sintering temperature. The optimal product was produced with 0.33AMF, foaming at 100 °C/h and sintering at 1600 °C. This product attained high porosity of 94.39%, large average pore size of 300 µm and the highest compressive strength of 384 kPa. To i...

Abstract Foamed lightweight soil has been widely used in civil engineering, and the model for foam concrete employed to predict its strength. However, various previous strength models of are generally based on assumption complete hydration, which is not case foamed soil. For example, Nambiar’s (reference), a simple model, sets ratio hydrated water cement by weight as an empirical constant, actu...

Recently, a large amount of circulating fluidized bed boiler ash (CFBA) and desulfurization gypsum (DSG) has been produced, it is essential to develop technology to utilize them. These materials have CaO SO3, which are considered be a stimulant for blast furnace slag (BFS). This study presents an experimental investigation the compressive strength heavy metal ions immobilization properties...

Abstract Modern materials used in civil engineering should fulfill the numerous of requirements connected building standards, but not only. They also be ecological and durable. Geopolymers are characterized by very good mechanical properties, high resistance against acids, chlorides sulfates, thermal resistance, other properties confirmed previous research. There is still a few amount research ...

Foamed concrete consists of cement matrix and air-foam has more complicated structure characteristics than normal concrete. However, current research on the elastic modulus foamed is still limited to empirical equations. In this work, a new theoretical prediction model was proposed for calculating The calculation spherical shell element constructed based Walsh formula assumption pores. Moreover...

Thirty-one materials have been tested in compression in order to generate the stress (force per unit of cross-sectional area) versus strain (deformation) behaviour, for the purpose of assessing the suitability of various foamed plastics and rubbers as shoe insole materials. It was found that the materials could be classified into three distinct categories (very stiff, moderately deformable and ...

LIGHTWEIGHT CONCRETE May consist of lightweight aggregates are used in ordinary concrete of coarse aggregate and sand, clay, foamed slag, clinker, crushed stone, aggregates of organic and inorganic. It used in different common shapes such as light weight aggregate concrete [1], concrete without fine [2] or concrete with bubble [3]. It is replaced by normal concrete in several applications becau...