قائمة الطعام
This study evaluates the use of steel slag as additional replacement material in the production of hot mix asphalt (HMA) for road construction. There are two …
WhatsApp: +86 18221755073
The accurate measurement of the density of hydraulic cement has an essential role in the determination of concrete mixture proportions. As more supplementary cementitious materials (SCM), such as fly ash, and slag, or cement replacements materials such as limestone and calcium carbonate are used in blended cements, knowledge of the …
WhatsApp: +86 18221755073
A steel slag porous asphalt (SSPA) mixture, as the surfacing layer of permeable asphalt pavements, not only ensures the pavement surface drainage and noise reduction functions, but also improves the …
WhatsApp: +86 18221755073
Yi Yuanrong conducted research on the reaction mechanism of CO 2 capture using the wet method of slag and achieved carbon capture with the wet method by matching a slurry with slag powder . CO 2 capture using the wet method of solid waste of slag involves the three phases reaction: gas, liquid, and solid. Thus, the reaction …
WhatsApp: +86 18221755073
Experimental results indicated that the optimal performance was achieved when RP, slag powder and fly ash were mixed in a ratio of 60%, 20% and 20%, respectively. They speculated that RP, like fly ash, exhibited a "micro-aggregate" effect, which can effectively reduce the drying shrinkage of alkali-activated material. ... Test …
WhatsApp: +86 18221755073
P.O. 42.5 cement that meets the requirements of the GB/T175–2007 standard was used to prepare specimens [35], and its mechanical properties are indicated in Table 1.The supplementary cementitious material employed was S105-grade slag powder, with a specific surface area of 515 m 2 /kg. The binder materials' chemical …
WhatsApp: +86 18221755073
The paper thoroughly reviews the available literature related to direct and indirect pozzolanic reactivity test methods that have been utilized over the years. ... meaning that UPV increases as the samples' density increases ... metakaolin (MK), fly ash (FA), slag (SL), and glass powder (GP) [115,116,117,118]. Figure 13. Calculated UPVI ...
WhatsApp: +86 18221755073
Frias et al. reported that the fine powder of SiMn slag is appropriate for the use as an aggregate in concrete because it increases volumetric stability when employed as a cement admixture ... In the air content test method, a 1 L air content measuring device for mortar was used and the air content was measured using a pressure method in ...
WhatsApp: +86 18221755073
Metal Losses to the Slag in Smelting and Converting. 80% of the copper produced from ores worldwide originates from sulfide ores. The copper concentrate which results from flotation of the ore is typically smelted and converted to blister copper [].During smelting S and Fe are oxidized, where SiO 2 is added to form a liquid ferric or ferrous …
WhatsApp: +86 18221755073
3.3.1. Packing Density . In this work, a method developed by Wong and Kwan was used to determine the PD of pastes incorporating slag and SF, which is called the "wet packing method". The method involves varying water-to-cementitious material volume ratios (i.e., before and after reaching the optimum water demand).
WhatsApp: +86 18221755073
Test plan and method. Tests were conducted based on a compressive strength of 30 MPa, which is the normal range of application of concrete strength, and a GGBS substitution …
WhatsApp: +86 18221755073
where P 1 denotes the liquid density in g/cm 3, ρ s denotes the true density of the sample in g/cm 3, m a denotes the mass of the sample when exposed to air, and m f denotes the balance reading when …
WhatsApp: +86 18221755073
Ultrafine, highly active coal gasification slag (HCGS) was produced via a sustainable, green dry-ball-milling method. Coal gasification fine slag (CGS), a potential environmental pollutant, was used as a new source of rubber filler without pre-treatment, enabling waste utilisation. HCGS was added to styrene-butadiene rubber (ESBR) …
WhatsApp: +86 18221755073
Fine aggregate is quartz sand with specific gravity of 2.58, particle size varied from 150 µm to 600 µm, and fineness modulus of 2.25. Quartz powder with specific gravity 2.65, particle size varied from 10 µm to 45 µm, and fineness modulus of 2.8 is used as a micro filler to enhance the particle packing of the microstructure.
WhatsApp: +86 18221755073
The cement industry is known for being highly energy-intensive and a significant contributor to global CO2 emissions. To address this environmental challenge, this study explores the potential of using the waste materials of steel slag (SS) and eggshell powder (ESP) as partial replacements for cement in alkali-activated mortars (AAMs) …
WhatsApp: +86 18221755073
The steel slag powder was produced by grinding steel slag with a planetary ball mill and passing through a 0.075 mm sieve. The d(0.1), d(0.5), and d(0.9) particle size distribution of steel slag powder were obtained by laser particle size analyzer to be 0.949 μm, 10.272 μm, and 44.181 μm, respectively.
WhatsApp: +86 18221755073
The steel slag powder (labelled as SS) used in our study is from Rugao, Jiangsu in China, which has a density of 3.22 g/cm 3 and a specific surface area of 3.80 m 2 /g. The particle size distribution of steel slag powder is given in Fig. 1, and its chemical composition determined by X-ray fluorescence (XRF) and mineral composition …
WhatsApp: +86 18221755073
Nowadays, there are methods and tests that allow measuring the density of the materials, for example, the standard test method and the modification of this test in Helsel et al. (2015) are used to ...
WhatsApp: +86 18221755073
The soil samples for this test were taken from Chenggong District, Kunming City, with a sampling depth of about 2.0–2.5 m. The fundamental indices of the red clay were determined through indoor geotechnical tests (Table 1).By analyzing the composition of the original red clay, it was found that its mineral composition was mainly quartz, kaolinite …
WhatsApp: +86 18221755073
The objective of this study is to explore the feasibility of developing environmentally friendly green roller-compacted concrete (RCC) by utilizing locally available materials. The research investigates the behavior of RCC properties when different amounts of solid waste materials (brick powder, glass powder, and steel slag) are added as substitutes for cement content.
WhatsApp: +86 18221755073
The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, …
WhatsApp: +86 18221755073
Zhong et al. found that the compressive strength of a dry mixed block made from steel slag powder (with a water–slag ratio of 0.12) was significantly enhanced to 69.9 MPa under a CO 2 pressure of 0.55 MPa and a temperature of 70 °C for 360 min, while the compressive strengths of steel slag blocks produced without carbonization …
WhatsApp: +86 18221755073
Slump and air content tests were conducted in accordance with the KS F 2402 test method for concrete slump and KS F 2421 test method for air content of fresh concrete using the pressure method ...
WhatsApp: +86 18221755073
Steel slag powder as supplementary cementitious materials: ... 2.2.1. Density Test . ... it can be found that the steel slag produced by the drum method from BG has the highest apparent density. Relative to drum method slag, the rougher production process of hot smothering steel slag and hot splashing slag reduces the density of …
WhatsApp: +86 18221755073
The apparent density and chemical compositions of steel slag (2.36–4.75 mm), SSP, and LP were analyzed by the Chinese standard test method and Zetium X …
WhatsApp: +86 18221755073
Ground Granulated Blast Furnace Slag (GGBS) The importance of Ground Granulated Blast Furnace Slag (GGBS) lies in its greener way to become a substitute in concrete material. GGBS being a waste material, it needs proper method for disposal. So incorporating this waste material in concrete can reduce the depletion of …
WhatsApp: +86 18221755073
Steel slag powder (SSP) and steel slag fine aggregate (SSFA) ... average water absorption of 1.67%, and a dry density of 2.67 kg/m 3; its grading complied with ASTM C33 specifications. ... Test methods for on site measurement of resistivity of concrete—a RILEM TC-154 technical recommendation. Constr Build Mater …
WhatsApp: +86 18221755073
6] is the standard test method to measure the density of hydraulic cement. The current testing standard is time consuming and requires disposal of the chemicals. A specially designed flask, called aLe Chatelier flask, and 300 mL/test (or 900 mL for a 3 replica) of kerosene are required to perform the standard test, producing.
WhatsApp: +86 18221755073
Sodium metasilicate (Na 2 SO 3 ·5H 2 O) is used as an activator. It is a white crystal powder / granule consisting of Na 2 O (29.25 (wt %)), Si 2 O (29.25 (wt %)) and H 2 O (41.5%). Fine and coarse aggregate, taken from Isfahan quarries, were modified to match ASTM C33 [].Sand reform required dividing the local sand into three sections, as shown …
WhatsApp: +86 18221755073
In this paper, steel slag powder was used to replace part of the cement in road concrete, and group tests were carried out on coarse aggregates with different water–cement (W/C) ratios, different steel slag parameters, and different particle sizes. A sample of 100 mm × 100 mm × 100 mm was prepared and cured for 3 days, 7 days, and …
WhatsApp: +86 18221755073حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
