The presence of sodium sulfate in the wash water can be detected by the reaction of the wash water with barium chloride (BaCl . 2 ). Cloudiness indicates the presence of sodium sulfate. 6. Dry to constant mass at 230° ± 9°F and cool to room temperature. 7. Sieve each test sample to refusal over a sieve having square openings one-half the

Xu et al. (2016) carried out a series of triaxial compressive tests on frozen saline silty sand with the sodium sulfate content of 0.5% at the temperature of − 6 °C, …

Add sodium sulfate into the graphitized carbon black cartridge to ca. 1 ... It is also observed that some bricks had higher crushing strength than that of cement-sand blocks samples. It can be concluded that the observed variation in the crushing strength of un-bumt bricks indicates a similar variation in strength when the same is used as a ...

A Dictionary of Earth Sciences. sodium-sulphate soundness test A method of testing the weathering resistance, particularly to frost action, of building materials. A sample is soaked in saturated sodium-sulphate solution, drained, and dried. This is repeated and the sample examined for cracks. The method simulates the stresses due to frost action.

Granite sand was used to adsorb anionic surfactant, sodium dodecyl sulfate (SDS) from water at natural pH 6.25. The effect of adsorbent size, pH, temperature and amount of adsorbent has been examined. The results indicate that the Langmuir model provides the best correlation of experimental data.

This study focuses on the mechanical properties of G-UHPC against sulfate attack at elevated temperature, thus, the following assumption was adopted: (1) G-UHPC is used as the mass concrete in an engineering structure constructed rapidly; (2) after casting G-UHPC, this structure would be naturally cured for 1 day, then, used in a sulfate …

Triaxial compressive tests were conducted on a frozen silty sand with four sodium sulfate contents (0.0%, 0.5%, 1.5%, and 2.5%) at temperature of −6°C. The test results revealed that it is ...

Article. Open access. Published: 07 May 2021. Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow....

Triaxial compressive tests were conducted on a frozen silty sand with four sodium sulfate contents (0.0%, 0.5%, 1.5%, and 2.5%) at temperature of −6 °C.The test results revealed that it is important and necessary to firstly identify whether the concentration of sodium sulfate solution in the silty sand is saturated for studying …

Images of salt crust formed by sodium sulfate or calcium chloride: (a) denotes sodium sulfate salt and (b) denotes calcium chloride salt. Numbers 1, 2 and 3 represent soil salt contents of 2%, 4% ...

gravity should range from 1.151 through 1.174 for the sodium sulfate solution, or from 1.295 through 1.308 for the magnesium sulfate solution. 4.1.4 Discard a discolored solution, or filter it and check for specific gravity. Table 2—Minimum Mass of Salt Per Liter of Water Salt MgSO4 Na2SO4 Anhydrous 350 g 215 g Crystalline 1400 g 700 g

Triaxial compressive tests were conducted on a frozen silty sand with four sodium sulfate contents (0.0%, 29 0.5%, 1.5%, and 2.5%) at temperature of 6 C. The test results revealed that it is ...

First, saline soils containing sodium sulfate or magnesium sulfate were prepared, and the corresponding salt solutions were also prepared as references. ... The fine aggregate with a particle size range of 0.75–5 mm is river sand with a fineness modulus of 2.62, a clay content of 1.42 %, and an apparent density of 2.54 g/cm 3. Tap …

Sodium sulfate, potassium sulfate and magnesium sulfate oral solution (for adults) is an osmotic laxative and is provided as two bottles each containing 6 ounces of solution. Each bottle ... 12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action - Sulfate salts provide sulfate anions, which are poorly absorbed.

2.3 Water. Tap water was used for production of mixtures and to prepare the sulfate solutions. 2.4 Sulfate and Sulfate Solution. In the present study, sodium sulfate (Na 2 SO 4) was used to create the sulfate solution and sulfate was used in the mixtures.Three sulfate concentrations of 0%, 2% and 5% (by dry weight of soil to ensure …

The sulfate degradation processes were compared between sodium sulfate and magnesium sulfate solutions with nano-silica replacements of 0, 1, and 8 wt% in CEM I Portland cement. Expansion, mass/strength loss, and microstructural alterations (spatial distribution of secondary phases and chemical compositions on C–S–H) of the degraded …

Figure 5 shows that the crust formed by sodium sulfate is mainly a lamellar structure with texture, which is easily broken when it is subjected to vertical pressure or high-speed erosion of sand ...

[PDF] Effects of sodium sulfate content on mechanical behavior of frozen silty sand considering concentration of saline solution | Semantic Scholar. DOI: …

Xu et al. (2016) carried out a series of triaxial compressive tests on frozen saline silty sand with the sodium sulfate content of 0.5% at the temperature of − 6 °C, and compared the variations of the initial tangent modulus (E 0) and the secant modulus corresponding to half the strength (E 0.5) with different

When the sand particles are completely coated by calcium chloride crystals, the color of the surface of the sample turns gray-white. ... Sodium sulfate crystals crystallize in the pores of sandy soil. The crystals of sodium sulfate aggregate to form large crystals and then wrap around the upper surface of the particles of sandy soil, forming a ...

Mineral Commodity Summaries. Published annually, this Government report contains estimates covering nonfuel mineral industry structure, Government programs, tariffs, and 5-year salient statistics for about 90 individual mineral commodities. Individual data sheets are available through the mineral commodity links on this page.

chloride with sodium sulfate ... wind‑sand ow Shenghui Li1,2, Chengzhi Li1,2,3* & Xiaolei Fu1,2 Soil salt crust can change the structure of aeolian soil and improve its resistance to wind erosion.

Chang et al. [29] studied the sulfate attack performance of fair-faced concrete in a real marine environment and in a 5% sodium sulfate solution, and revealed that in the real marine environment, ... It is commonly understood that seawater and sea sand are rich in sulfate, and sulfate ions are uniformly distributed inside SWSSC, unlike …

Granite sand was used to adsorb anionic surfactant, sodium dodecyl sulfate (SDS) from water at natural pH 6.25.The effect of adsorbent size, pH, temperature and amount of adsorbent has been examined. The results indicate that the Langmuir model provides the best correlation of experimental data.

Soil salt crust can change the structure of aeolian soil and improve its resistance to wind erosion. Four ions (Na +, Ca 2+, Cl-, and SO 4 2-) with high contents in aeolian soil were selected for a salt crust experiment.The experiment set a variety of gradients of soil salt contents and salt mixing ratios of Na 2 SO 4 and CaCl 2.The …

The soundness test repeatedly submerges an aggregate sample in a sodium sulfate or magnesium sulfate solution. This process causes salt crystals to form in the …

In the other hand, the content of titano-magnetite (Fe2TiO4-Fe3O4) in the iron sand increase with addition of sodium sulfate (Na2SO4). Meanwhile, from semi-quantitative analysis result with the variation of sodium sulfate (Na2SO4) in 5%, 15%, and 25% have an optimum point on the addition of 15% sodium sulfate (Na2SO4) with 46,9% of titano ...

Quartz sand, sodium sulfate and carbon (crushed) were mixed in a weight ratio of 100:81.4:6.5. Said mixture was charged continuously into a thermal insulation horseshoe-flame furnace and heated to 1420-1450° C. The resultant solid sodium silicate was dissolved in water and filtered to obtain a 3.5 M and 29 Be′ sodium silicate (water glass ...

Technical Service. Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others. Sigma-Aldrich offers Sigma-Aldrich-13462, Sodium sulfate (Na2SO4) for your research needs. Find product specific information including CAS, MSDS, protocols ...

The compressive strength of lightweight sand concrete at 18 months immersed in a sodium sulfate solution for (LSC (Na 2 SO 4)), increases by 40% …

The basic procedure is as follows (from Roberts et al., 1996 [1] ): Oven dry the sample and separate it into specific sieve sizes. Immerse the sample in a saturated solution of sodium or magnesium sulfate and let it remain at a constant temperature for 18 hours. Remove the sample from the solution and dry to a constant weight at 110 ± 5 o C ...

Triaxial compressive tests were conducted on a frozen silty sand with four sodium sulfate contents (0.0%, 0.5%, 1.5%, and 2.5%) at temperature of -6 °C. The test results revealed that it is important and necessary to firstly identify whether the concentration of sodium sulfate solution in the silty sand is saturated for studying effects of the salt content on …

A novel water-soluble sand core hardened by twice microwave heating was fabricated using composite solution of magnesium sulfate and sodium sulfate as a binder. The tensile strength, water absorption rate, gas evolution and water-soluble rate of the water-soluble composite sulfate sand core (WCSSC) were studied. The micro …

DOI: 10.14359/51689678 Corpus ID: 136268821; Sulfate Resistance of Portland and Slag Cement Concretes Exposed to Sodium Sulfate for 38 Years @article{Alapour2017SulfateRO, title={Sulfate Resistance of Portland and Slag Cement Concretes Exposed to Sodium Sulfate for 38 Years}, author={Fatemeh Alapour and …