slag strontium sand

Mechanical and durability properties of metakaolin blended with slag

A one-part electric furnace nickel slag-based geopolymer (OENG) repair material was prepared through mechanical activation. Also, the effects of silicate modulus and alkali dosage on the properties of compressive strength, bond strength, and drying shrinkage were investigated, then analysed using XRD, DTG, MIP, and SEM …

Analysis of Active Mechanism of Chemical Activated …

In this study, two test sections with strontium slag base layer were paved in low-volume roads in China to investigate its performance and environmental impact: (1) …

Carbon dioxide-hardened sodium silicate-bonded sand …

This study used the SBS bonded with limestone sand acquired from the Zhongtieshanqiao Group (Qinhuangdao City, Hebei Province, China). Sodium metasilicate was used as a chemical binder, which was subjected to CO 2-hardening process by passing carbon dioxide gas through the compacted sand.The modulus of sodium silicate was …

Source apportionment and health risk assessment of chemicals …

Strontium (Sr) is an alkaline earth metal that has adverse effects on bone tissue, but received little attention compared to other often-studied metals. This study analyzed the contents/concentrations of Sr, barium (Ba), sulfate (SO 4 2- ), sulfide (S 2- ), and six common metals in 209 multi-media samples, including slag, soil, groundwater ...

Use of Slags in the Production of Portland Cement Clinker

Clinkers from slag-based raw mixes are different in terms of the number of alite growths. The strength of cements was defined in small samples from cement paste (1:0) with water-cement ratio of 0.28. The results given in Table 3 show that the use of slags in raw materials instead of clay positively affects the activity of clinkers.

Slag Driveway Pros and Cons

However, slag also contains toxic ingredients like Strontium, Chromium, Cadmium and Nickel. These substances are pollutants for the environment and also for human health. ... These granulated particles are sand-sized grains. The slag is cooled rapidly by jets of pressurized water, giving it a granulated look. Because of its properties, …

Enhanced slag resistance and mechanical properties of …

Magnesia castables have been widely used in metallurgical industries with the advantages of high refractoriness, non-polluting steel, and resistance to alkaline slag. Magnesia castables were prepared using strontium carbonate (SrCO_3) as additive to enhance slag resistance and mechanical properties, and the influence of SrCO_3 on the …

Blast Furnace Slag as an Alternative to Silica Sand for A356 …

The objective of this investigation is to assess the feasibility of substituting commercial-grade silica sand (CGSS) with granulated blast furnace slag (GBFS) for green mold casting process. Central composite design of response surface methodology (RSM) is used to optimize mold constituents of the GBFS mold. The RSM model predicted the …

Source apportionment and health risk assessment of

Section snippets Study area and field sampling. The study area was a site of a closed SrCO 3 production plant (now a Sr slag pile area) and its surrounding area in Chongqing, China. The closed plant formerly adopted the black ash method to produce SrCO 3, using SrSO 4 as raw material. Firstly, SrSO 4 was roasted with coke at about …

Chemical activator 7d strength of strontium slag sand.

Download scientific diagram | Chemical activator 7d strength of strontium slag sand. from publication: Analysis of Active Mechanism of Chemical Activated Strontium Slag | …

Analysis of Active Mechanism of Chemical Activated …

The mix ratio of cement and strontium slag mortar mixed with different chemical activators is shown in Table 2. Standard sample P.O is used as reference comparison. Table 2. Mixing ratio of chemical additive strontium slag cement sand. Test number admixture /g Standard sand /g cement /g water /ml strontium slag /g P.O - …

Enhanced slag resistance and mechanical properties …

Magnesia castables were prepared using strontium carbonate (SrCO 3) as additive to enhance slag resistance and mechanical properties, and the influence of …

Mechanical and durability properties of metakaolin blended with slag

When the slag content exceeds a certain value, the main reaction product, C-S-H gel, is eroded and dehydrated, and harmful ions invade the cracks, leading to a decrease in gel stability. Overall, the polymerization process of the mortars was enhanced by the presence of GGBS, making them less sensitive to chemical environments. 3.5. …

Performance of metakaolin/slag-based geopolymer

The geopolymer binder adopted was a mix of metakaolin (MK) and granulated blast furnace slag (GBFS), activated by an alkaline solution (SiO 2 /Na 2 O=1.8) with a water to solid ratio of 0.5. A control GC (0% RA) with C35/45 class of compressive strength and S4 class of workability, and three GC mixtures with 10, 30 and 50% of RA were ...

Slag uses in making an ecofriendly and sustainable …

As part of our effort to preserve the environment, the incorporation of ground granulated blast-furnace slag (GGBFS) or fully replaced by alkali-activated slag (AAS) …

Effect of strontium slag on early hydration and mechanical …

Belite-calcium sulfoaluminate (Belite-C 4 A 3 $) cement is one type of low-calcium clinker with good long-term compressive strength and durability. Yet, its early mechanical property is lower than P·І 42.5. In this paper, the effect of strontium slag on the preparation and performance of belite-C 4 A 3 $ cement was investigated. Moreover, the …

Slag uses in making an ecofriendly and sustainable concrete: A …

Slag, as shown in Fig. 1, is the 16th ingredient of high-performance concrete production [22], called supplementary cementitious materials (SCM) [23], that can enhance the strength and durability of concrete [2].The highly fine slag powder, with a surface area of 400–600 m 2 /kg and a bulk density of 1200 kg/m 3, can be mixed with free lime to …

Performance and Environmental Evaluation of …

Strontium slag, a by-product of the strontium carbonate refining industry, has been produced at million tons per year in China. The use of strontium slag in the roads could reduce the demand of materials and help …

Analysis of Active Mechanism of Chemical Activated …

The mix ratio of cement and strontium slag mortar mixed with different chemical activators is shown in Table 2. Standard sample P.O is used as reference comparison. Table 2. Mixing ratio of chemical additive strontium slag cement sand. Test number admixture /g Standard sand /g cement /g water /ml strontium slag /g P.O - 1350 450 225 -

Investigation on the utilization of coal gasification slag in …

GGBFS, steel slag and ladle slag generated from smelting process of steel as reactive mineral additive have been utilized in PC [9], [10], [11]. In addition, fly ash produced by coal combustion has been an important component in PC and concrete [12], [13], [14]. However, compared with the extensive literature on the above solid wastes, the ...

The Ultimate Guide to Choosing the Right Sandblast Media …

1. Sand. Sand was one of the first materials used in blasting and was the namesake of the process. However, it's less frequently used today due to health concerns. 2. Glass Beads. Glass beads are a common type of abrasive blast media. They are particularly effective for cleaning delicate surfaces and producing a smooth, polished …

EXPERIMENTAL ANALYSIS OF CEMENT CONCRETE …

assessed by partially replacing sand with iron slag. The sand has been replaced by slag accordingly in the range of 0% (as a control mix) 10%, 20%, 30%, 40%, 50% and 60% by weight of sand for M20 mix. Concrete mixtures were produced, tested and compared in terms of compressive and split tensile strength with the conventional concrete.

Metakaolin-Based and Blast Furnace Slag-Activated …

Sustainability leads a cementless materials branch in material engineering and science. Geopolymer is one part/leaf of the sustainability branch and has many advantages (i.e., less carbon emission and low energy consumption in production) attracting attention itself. The recent dizzying progress observed in geopolymers has now turned its …

Optimized potential performance of slag sand in …

An experimental analysis of cement mortar's microstructure, mechanical, and durability properties is investigated by replacing sand with 0, 25, 50, 75, and …

Strontium slag pile (a) and 2 μm slag SEM image (b).

The accumulation of strontium slag occupies land and pollutes the environment. According to incomplete statistics, at present, the total amount of strontium slag abandoned in the slag field has ...

Molecules | Free Full-Text | Hydration and …

The compressive strength and flexural strength increased by 33% and 9.8%, respectively, and the elastic modulus increased by 22%. Hisham Qasrawi et al. [ …

Microwave irradiation assisted sodium hexametaphosphate modification …

Blast furnace slag (BFS) produced from smelting iron procedure has become one of hot-spot materials for the preparations of geopolymer and cementitious materials. ... Strontium nitrate (Sr(NO 3) 2, Analytical grade) used for the preparation of stock solution was purchased from Shandong XIYA reagent factory, China. The stock solution …

Use of steel slag as sustainable construction …

Steel slag is a by-product discharged from the steelmaking process, which is characterized by abundant free calcium/magnesium oxide, low …

Mohs Hardness rev. 03/2020

Silica Sand 6 - 7 Olivine 6.5 Pyrite 6.5 Titanium Dioxide, Rutile 6.5 Zirconium Silicate (Zircon) 6.5 - 7.5 Copper Slag 7 Cuttlebone 7 Furnace Slag 7 Glass (Lead Free) 7 Quartz (Silica Sand) 7 Specular Hematite 7 - 7.5 Staurolite 7 - 7.5 Garnet 7 - 8 Emery 7 - 9 Spinel ~8 YAG 8¼ Steel Shot/Grit 8 Zirconia 8 Chrysoberyl 8.5 Aluminum Oxide/Alundum 9

Source apportionment and health risk assessment of

Download Citation | Source apportionment and health risk assessment of chemicals of concern in soil, water and sediment at a large strontium slag pile area | Strontium (Sr) is an alkaline earth ...

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