We value your feedback! Please complete the form below so that we can tailor our services to your specific needs.
relationships between the mineral additive content and the final concrete qualities.on . ... 36. Blends with fly ash, slag, and silica fume were also combined with a super water reducer at W/S ...
WhatsApp: +86 18221755073
Fly Ash is the most widely used SCM in concrete and is a byproduct of coal combustion in electric power generating plants. The use of fly ash in concrete can contribute to LEED points through local materials, recycled contents and …
WhatsApp: +86 18221755073
Low-calcium (FA) and high-calcium (HCFA) fly ash and granulated blast furnace slag (GBFS) are the most widely known, standardized and used SCMs in the composition of …
WhatsApp: +86 18221755073
terns (from 17 to 35 for fly ash and from 25 to 35 for slag). The reactivity of slag could be indicated by its abundant amorphous content (over 98%). On the other hand, the reactivity of fly ash is reflected by its reactive silica content of 43.04% and reactive alumina content of 15.51%, as reported in a previous study [19].
WhatsApp: +86 18221755073
This study investigates the effects of curing conditions, fly ash, and silica fume on the strength of alkali-activated steel slag. Specifically, it examines ambient air conditions at 18–20 °C and 59 %-80 % relative humidity, as well as curing in air at 20 °C and 95 % relative humidity, and in water at 20 °C.
WhatsApp: +86 18221755073
The small size and the glassy texture of fly ash and slag makes it possible to reduce the amount of water required for a given consistency. Workability. All mineral admixtures tend to improve the cohesiveness and workability of fresh concrete, but many do not possess the water-reducing capability of fly ash and slag.
WhatsApp: +86 18221755073
Maekawa [10], [11], [12] proposed a general hydration model (DuCOM) for concrete incorporating fly ash and slag. Fly ash and slag reactions are treated separately from those of ordinary Portland cement, and some interactions are taken into account through the free water content and the calcium hydroxide concentration.
WhatsApp: +86 18221755073
Based on the previous study [40], the workability and mechanical properties of mixes with a slag/fly-ash ratio of 80/20 are superior, so the slag/fly ash ratio was set as 80/20 and the content of Na 2 O in the alkali-activator was set as 6 % in this study.
WhatsApp: +86 18221755073
These observations are similar to the effect of using both sodium hydroxide and sodium silicate as alkali activator in alkali-activated slag/fly ash systems. A higher polymerization of the gel ...
WhatsApp: +86 18221755073
In this study, the effect of different content (20 %, 30 %, 40 %, and 50 %) of ground granulated blast furnace slag (GGBFS) on the mechanical performance of circulating fluidized bed fly ash …
WhatsApp: +86 18221755073
It was observed that the increase of fly ash and copper slag shows the improvement in the fresh properties. 20% fly ash used as optimum to replace copper slag in fine aggregate. 40% of copper slag ...
WhatsApp: +86 18221755073
Traditional Portland cement has been widely used in the field of building materials, but its long-term use inevitably leads to a large amount of carbon dioxide emissions and energy consumption ...
WhatsApp: +86 18221755073
In this article, the content of fly ash accounted for 80% of the total precursor (fly ash + slag), and a mixed solution of sodium silicate and sodium hydroxide was used as alkali …
WhatsApp: +86 18221755073
This paper presents a novel low-carbon binder formulated from fly ash (FA), ground granulated blast furnace slag, steel slag, and desulfurization gypsum as a quaternary solid waste-based material. It specifically examines the influence of FA content on the mechanical properties and hydration reactions of the quaternary solid waste-based binder. The mortar test …
WhatsApp: +86 18221755073
From technical, economic and ecological points of view, siliceous by-products are now recognized and accepted as desirable and vital constituents of concrete. Current specifications for such materials tend to be restrictive to some extent, however, and in many countries there are separate standards for each admixture. These in turn inhibit the wider use of these mineral additions to …
WhatsApp: +86 18221755073
Due to the rapid development of circulating fluidized bed (CFB) combustion technology, CFB fly ash (CFBFA) has accumulated in large quantities over the years [21], and its resource utilization has attracted the attention of many scholars.The rough and porous microstructure along with the high f-CaO content of CFBFA lead to its high water requirement, rendering untreated CFBFA …
WhatsApp: +86 18221755073
The results indicated that the compressive strength of slag-fly ash-red mud-based geopolymer mortar under different mixing ratio conditions was consistently superior to that of cement mortar, where the optimum mixing ratio for the geopolymer mortar was S33F33R33. ... (blast furnace slag, fly ash [26,27]), natural minerals (metakaolin, calcined ...
WhatsApp: +86 18221755073
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 ash reacts at a …
WhatsApp: +86 18221755073
When it comes to whether you should choose slag vs fly ash, slag may be the preferred choice for projects requiring high strength and durability. Its excellent resistance to …
WhatsApp: +86 18221755073
By adding steel slag powder while keeping the content of mineral powder and fly ash constant, the crack area per unit area in concrete reduced with increased content of steel slag powder. Additionally, G53 (15% mineral powder, 15% fly ash and 15% steel slag powder) revealed the smallest crack area per unit area, recorded at 186.7 mm/m 2, 57.8% ...
WhatsApp: +86 18221755073
Similar to slag, fly ash offers numerous advantages that have led to its widespread use in construction, including: Supplementary Material. One of its most notable qualities is its pozzolanic properties, which means it reacts with calcium hydroxide in the presence of water to form cementitious compounds. When mixed with concrete, this enables ...
WhatsApp: +86 18221755073
Some studies have demonstrated that adding an appropriate amount of supplementary cementitious materials, such as fly ash (FA) and ground-granulated blast slag (GGBS), can improve the bonding strength between concrete and aggregates ... and the torque first increased and then decreased with an increase in the mineral powder content.
WhatsApp: +86 18221755073
Fly ash can be modified or transformed into new materials for heavy metal ions adsorption. The high content of Al 2 O 3 and SiO 2 in class F fly ash make it suitable for …
WhatsApp: +86 18221755073
The addition of fly ash in modified steel slag changed its chemical and mineral composition. The aluminium in fly ash reacted with calcium and iron in steel slag to form C 4 AF. The silicon in fly ash decreased the content of silicon in modified steel slag and then formed the Ca-Si-Al-O glass.
WhatsApp: +86 18221755073
The effects of particle size, chemical composition, glassy phase content on the reactivity of slag and fly ash are investigated. The physical and chemical requirements of slag and fly ash for the stable performance of AAM are summarized.
WhatsApp: +86 18221755073
The cement industry represents a viable alternative to replace the current landfill areas as a suitable destination since the bulk of the ash compounds are compatible with cement chemistry (Boghetich et al., 2005; Chen et al., 2016; Zhu et al., 2009).Fly-ash could act as a Supplementary Cementitious Material (SCM) (Thomas, 2007).Using fly-ash as an SCM can …
WhatsApp: +86 18221755073
In this work, Iron-rich copper slag (CS) is valorized in the preparation of alkali-activated geopolymer by blending it with fly ash (FA) (0–). The addition of fly ash increases the heat of the reaction (calorimetry) as a result of enhanced dissolution–precipitation which helps to propel the reaction due to the high amount of Al. The CF3 blend attains a strength of 40.2 …
WhatsApp: +86 18221755073
Cement production emits a large amount of CO 2 into the atmosphere and consumes significant mineral resources, necessitating urgent green transformation in this traditional industry. To address carbon emissions in the building materials sector and effectively utilize industrial solid waste, this study presents the preparation of geopolymer mortar using a …
WhatsApp: +86 18221755073
Experiments were conducted to study the stabilization of mine solid waste using three types of inorganic binders: fly ash, carbide slag, and a composite of fly ash and carbide slag. For fly ash, three dosages of inorganic binder were used: 10%, 20%, and 30%. For the carbide slag, six dosages were set: 2%, 4%, 6%, 10%, 20%, and 30%.
WhatsApp: +86 18221755073
In total, 39 mixes of specimens were prepared in this study to examine the effects of content, fly ash, slag powder, silica fume and water-to-binder ratios on the properties of ed concrete specimens. ... The properties of ed concrete were more sensitive to silica fume with different addition levels compared to other mineral ...
WhatsApp: +86 18221755073
