Application of alkali-activated slag concrete in railway sleepers

Alkali-activated cements and mortars based on blast furnace slag and red clay brick waste

“…The ecological and technical advantages of AAC have seen them attract significant from both the scientific and industrial communities worldwide [19][20][21][22][23]. Such materials usually consist of two components, an aluminosilicate precursor and an alkaline activator, with a variety of industrial by-products and aluminosilicate solids having been used as the raw materials.…”

An investigation of the microstructure and durability of a fluidized bed fly ash–metakaolin geopolymer after heat and acid exposure

“…This new material was likely to have enormous potential to become an alternative to Portland cement and it is receiving increased attention due to the need of new binders with enhanced durability performance [22][23][24][25][26][27][28].…”

Fracture Theory Under Freeze-Thaw Cycles and Freeze-Thaw Resistance of Alkali-Slag Concrete

“…In this study, the activator is composed of Na 2 According to GB/T 18046-2000 "Ground granulated blast furnace slag used for cement and concrete" [17], GB/T 18736-2002 "Mineral admixtures for high strength and high performance concrete" [18] and GB/T 12957/2005 "Test method for activity of industrial waste slag used as addition to cement" [19], 7 and 28 days activity indexes of the slag are 96.2% and 105.7%, which are high.…”

“…However, cement production causes serious pollution and consumes a large amount of energy and nonrenewable resources such as coal, using large amount of limestone, iron ore, clay, etc. The traditional production process emits large amount of dust, and also exhausts huge amount of CO 2 , SO 2 , NO X and other emissions. It is calculated that 1 t of cement clinker's atmospheric emissions will be 1 t of CO 2 , 0.86 kg of SO 2 , 1.75 kg of NOx and 130 kg of dust.…”

“…There are many studies about alkali-activated concrete these years including application in railway sleepers [2], characteristics after exposure to high temperature [3], mixed fine aggregates [4], static and dynamic performances [5], mechanical properties [6], durability [7], ecoefficiency [8] and heat resistance characteristics [9]. Ravikumar [10] and Neithalath [11] successively published papers about chloride ion transport and electrical impedance of alkaliactivated slag concrete.…”