:the aim of this work is to investigate the influence of sodium oxide on properties of fresh and hardened paste of alkali-activated blast furnace slag from isfahan steel plant. the silica modulus (sio2/na2o) of activator was adjusted at 0.6 and a number of mixes were designed in such a way to contain different levels of sodium oxide including 1, 2, 3, 4, 5, and 6% by weight of dry slag. the mos...

it has been shown that geopolymerization can transform a wide range of waste aluminosilicate materials into building materials with excellent chemical and physical properties such as fire and acid resistance. in this research work, geopolymerization of construction waste materials with different alkali-activators based on combinations of na2sio3 and naoh has been investigated. a number of syste...

The development of alkali-activated binders seems to present a greener alternative to OPC. The present study has been made on the low calcium fly ash with alkali activator as an alternative binding material as mortar. The mortar has been prepared with ennore sand and Indian fly ash mixed with alkali activator fluid consisting of sodium silicate and sodium hydroxide of different concentrations. ...

Geopolymer paste is an innovative construction material which shall be produced by chemical action of inorganic molecules. It is a more environmentally friendly alternative to conventional Portland cement which is abundantly available worldwide. In this study, the influence of different alkaline activators (Na and K) on the mechanical and thermal behaviors of metakaolin-based geopolymer was inv...

Alkali-activated binders have been considered a low carbon alternative to cement and are produced by reacting aluminosilicate precursor with an alkali-activator. However, alkali-activators observed be major contributor the environmental burdens of alkali-activated materials regarding various impact categories. Therefore, this study aims perform assessment using life cycle methodology on mortars...

Sustainable development of concrete construction requires sustainable materials or binders. Specifically, alkali-activated (AAMs) are an interesting and wide group materials. They have good strengths considered environmentally friendly because secondary consumed during the preparation AAMs. The durability AAMs is also excellent. One most important parts frost resistance. resistance usually very...

Abstract One-part alkali-activated materials prepared with solid-form alkali activator are gaining attention in the construction industry, as they an easier and safer approach for cast-in-situ applications comparison two-part (i.e., involving use of alkali-activator solutions). The present study compares one-part conventional mixing methods two aluminosilicate precursors, metakaolin ground gran...

Abstract Alkali-activated systems belong to the group of alternative inorganic binders in which binder properties are dictated by both aluminosilicate precursor and alkaline activator. In this work, blast furnace slag three different activators, namely sodium hydroxide, water glass, carbonate, were selected. An innovative mixture design based on same concentration alkali (Na + ) 4 mol/dm 3 for ...

In this paper, Bayer red mud and ground granulated blast furnace slag were formed into three different ratios (7:3, 5:5 3:7) of alkali-activated cementitious materials (AASR) using a water glass solution as the alkali activator. By studying compressive strength content, effect content on mechanical properties AASR was analyzed. The influence mechanism revealed by variation micro-porosity, conne...

Alkali-activated concrete is a promising alternative to conventional Portland cement-based concrete. However, further understanding in relation the durability of alkali-activated required. This paper explores resistance mixes aggressive media that expected encounter in-service. Findings indicate chloride, freeze–thaw and acid increases as slag content activator increased. performance against ch...