The present work reviews the various mineral admixtures used in concrete which modifies the concrete properties In this study cement is partially or completely replaced by different mineral admixtures such as fly ash silica fume rice husk ash Ground Granulated Blast Furnace Slag palm oil fuel ash and metakaolin The strength obtained is different for different
Methods of sampling fly ash 2021 Japan JIS A 6201 Fly ash for use in concrete 2015 United Kingdom BS EN 450 1 Fly ash for concrete Definition specifications and conformity criteria 2012 BS EN 450 2 Fly ash for concrete Conformity evaluation 2005 PD CEN/TR 15840 Evaluation of conformity of fly ash for concrete Guidelines for
BFS blast furnace slag; BA municipal solid waste incineration bottom ash; FGDG desulfurized gypsum; FA untreated municipal solid waste incineration fly ash; WFA1 the Cl content was about 6% after FA washing; WFA7
The Ca/Si ratio of gels varied with the slag content [73] with the increase of fly ash content the reduction of Na in N A S H gel was observed meanwhile the distribution of Ca/Si ratios was a constantly increased
In this study the effect of Na 2 CO 3 content on the mechanical properties compressive strength flexural strength and elastic modulus internal relative humidity autogenous shrinkage tensile creep and microstructure of alkali activated slag fly ash mortar ASFm with the Na 2 SiO 3 and Na 2 CO 3 as hybrid activator was investigated
The mineral composition determined by X ray fluorescence XRF is illustrated in Table 1 resulting in a decrease in the stimulation of the pozzolanic activity of slag and fly ash When the humic acid content exceeds 6% the strength ratio curve drops slowly which means that the strength development of GSO2 GSO4 is less affected by humic
The mineral precursors used in this study are a granulated blast furnace slag GGBS a class F powder coal fly ash PCFA according to ASTM C 618 and a waste glass powder GP residue fraction supplied by Van Gansewinkel Maltha the Netherlands
Fly ash FA Ground granulated blast furnace slag GGBFS are two types of mineral admixtures frequently using in the SCC FA is a fine grained residue of coal combustion in coal fired power plant GGBFS is a ground glassy granular material formed when molten blast furnace slag is quickly cooled
The more reactive the mineral admixtures are the higher the early age strength of the concrete will be On the other hand when GGBS with high CaO MgO content hydrates Design for durability and strength through the use of fly ash and slag in concrete ACI SP 178 vol 171 1997 Google Scholar Cited by 0 View Abstract
However Gao et al [14] found that increasing SF content reduced the workability of alkali activated slag fly ash paste since more water was needed to wet particle surface Moreover SF exhibits potential as an activator due to its chemical reactivity serving as a supplier of silicates in alkaline solutions [15] [16]
The physical properties of cementing and secondary cementitious materials are tabulated in the Table 1 including inert materials such as fine aggregate and coarse of copper slag fly ash and cement were observed with the help of SEM analysis and presented in Fig 1a Fig 1b Fig 1c respectively The suitability of fine aggregate
Geopolymer concrete GC utilizes industrial solid waste like steel slag fly ash and rice husk ash offering a sustainable alternative to traditional cement By reducing reliance on cement GPC helps mitigate carbon footprints and promotes eco friendly construction practices With its significant commercial potential GPC is poised to contribute to sustainable
The four cements in Series D showed similar trends 1 compressive strength at 3 days was higher than ternary blast furnace slag and limestone filler Series B or fly ash and limestone filler Series C cements due to the insertion of calcined clay which in the presence of limestone filler contributes to the rapid hydration reactions; and
To promote the widespread use of fly ash FA and coal gasification slag CGS in mine filling reducing the amount of cement and promoting the sustainable development of mining enterprises are essential In this study decarbonized CGS DCGS was prepared from CGS through decarbonization A new DCGS FA filling material was prepared using DCGS FA
Steel slag is the main solid waste generated in the steel making process accounting for 15 to 20% of crude steel output [1] China s crude steel output in 2021 was billion tons [2] more than half of the global crude steel output billion tons [3] and the steel slag output exceeded 120 million contrast the comprehensive utilization rate of
Likewise slag rich mixes exhibit greater strength values than the FA based mixes after a specific curing period There is no such considerable increase in strength with increasing curing duration for mixes containing higher slag content than FA In addition fly
In this study the effects of silicate modulus of activators Ms on carbonation of alkali activated slag/fly ash cements are studied and compared between natural % CO 2 and accelerated 1% CO 2 carbonation conditions via XRD FTIR and TG/DTG results in the decalcification of the C A S H gels and the formation of
There has been an increasing attempt for fly ash utilization in different sectors Loya and Rawani [5] identified top areas for the quantity of fly ash utilization as % in cement and concrete sectors % of ash in roads embankments and ash dyke raising followed by % in reclamation of low lying areas and land filling % in mine filling % in bricks
