This RILEM AAR-10 concrete prism test (CPT) is a performance method for testing aggregate combinations together with various binder (i.e. composite cements or pure Portland + Supplementary Cementitious Materials; SCMs). The covers the measurement of expansion produced by alkali-aggregate reaction prisms stored at 38 °C in humid environment which accelerates alkali-silica (ASR). principle this f...

Abstract In this work the influence of alkaline activator on immobilization lead and copper in alkali-activated blast furnace slag was investigated. A total five alkali activators were used; sodium waterglass, potassium hydroxide, hydroxide carbonate. The leaching test according to ?SN EN 12457°-4 used evaluate level heavy metals, leached solutions analyzed by ICP-OES. For a better understandin...

Basic properties of fly ash samples from different urban waste combustion facilities in China were analyzed using as X-ray fluorescence (XRF), scanning electron microscopy (SEM), X-ray diffraction (XRD). The leaching toxicity procedure and some factors influencing heavy metals distribution in fly ash were further investigated. Experimental results indicate that the fly ash structures are comple...

This study aims to investigate the feasibility of including silt, a by-product limestone aggregate production, as filler in geopolymer cement. Two separate phases were planned: The first phase aimed determine optimum calcination conditions waste silt obtained from Società Azionaria Prodotti Asfaltico Bituminosi Affini (S.A.P.A.B.A. s.r.l.). A Design Experiment (DOE) was produced, and raw calcin...

This study investigated the effect of alkali content (Na:Al = 0.86 and 1.39) brucite (i.e., Mg(OH)2) mineral addition on sulfuric acid resistance alkali-activated metakaolin geopolymers). Geopolymers consist primarily a sodium-stabilized aluminosilicate hydrate (N-A-S-H) framework. Results demonstrate that higher contents improve N-A-S-H, as evidenced by reduced dealumination Si Na leaching upo...

colloidal nanosilica is currently being produced by various methods which are mainly high energy intensive and/or not environmentally friendly. it is therefore essential to develop new energy-efficient and environmentally friendly technologies. this paper introduces a new ultrasound assisted route based on alkali leaching of silica fume for synthesis of colloidal silica nanoparticles. the ef...