scholarly journals Early Hydration Kinetics of Cementitious Materials Containing Different Steel Slag Powder Contents

2016 ◽  
Vol 34 (4) ◽  
pp. 590-596 ◽  
Author(s):  
Xiaowei Cui ◽  
Wen Ni ◽  
Chao Ren
Keyword(s):  
Steel Slag ◽  
Cementitious Materials ◽  
Hydration Kinetics ◽  
Early Hydration ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Kinetics Of

Effects of High Added Quantity SSA-SSP-GSP on Resistance to Carbonation of Concrete

2014 ◽  
Vol 670-671 ◽  
pp. 333-338
Author(s):  
Chang Ping Pan ◽  
Xiang Li ◽  
Xiao Xia Lv ◽  
Sheng Jin Ge ◽  
Jian Li Shang
Keyword(s):  
Industrial Waste ◽  
Steel Slag ◽  
Cementitious Materials ◽  
Cement Stone ◽  
Carbonation Depth ◽  
Slag Powder ◽  
Hardness Tests ◽  
Steel Slag Powder ◽  
Carbonation Resistance ◽  
Baseline Group

This work is aimed at carbonation resistance of steel slag concrete based on maximum utilization of industrial waste residue. The investigation is conducted to study the carbonization resistance of concrete which containing steel slag aggregate (SSA), steel slag powder (SSP) and blast furnace slag (GSP). The ordinary concrete as baseline group, the other concrete are fabricated with the 25% SSA, in combination with 30% SSP and 20% GSP by total binder content. The microscopic properties are analyzed by XRD, SEM, micro-hardness tests etc. Experimental results indicate that the carbonation depth of concrete which adding 25% SSA, 30% SSP and 20% GSP, have lower carbonation depth significantly than the reference at 28 day and 56 day. The substitution of natural aggregate and cement are 25%, 50% respectively by industrial waste residue, that can improving microstructure of aggregate-cement stone interface, optimizing cementitious materials hydration environment, concrete presents better durability performance.

Powder Characteristics and Cementitious Properties of Steel Slag Used as Supplementary Cementitious Materials

2017 ◽  
Vol 893 ◽  
pp. 384-388 ◽  
Author(s):  
Zai Bo Li ◽  
Tu Sheng He ◽  
Xu Guang Zhao ◽  
San Yin Zhao
Keyword(s):  
Steel Slag ◽  
Friction Angle ◽  
Cementitious Materials ◽  
National Standards ◽  
Supplementary Cementitious Materials ◽  
Water Quenching ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Powder Characteristics ◽  
Cementitious Activity

Powder characteristics and granule morphology of steel slag cooled by water-quenching and air splashing were observed with SEM and their rest angle, compressed density and mechanical characteristics were measured. The result shows that particle sphericity of air splashing steel slag is lower than that of water-quenching steel slag. A compressive stress has a more effective on the deaggregation of water-quenching steel slag powder. Both of the two steel slag powders are typical Coulomb powder. Compared with the water-quenching steel slag powder, air splashing steel slag powder has a higher internal friction angle and cohesiveness. The cementitious activity of BOFS Powder can only meets the standard of the second grade powder according to the Chinese National Standards.

scholarly journals Study on cementitious properties of steel slag

2013 ◽  
Vol 49 (2) ◽  
pp. 217-224 ◽  
Author(s):  
G. Zhu ◽  
Y. Hao ◽  
C. Xia ◽  
Y. Zhang ◽  
T. Hu ◽  
...  
Keyword(s):  
Converter Slag ◽  
Steel Slag ◽  
Cementitious Materials ◽  
Partial Substitution ◽  
Converter Steel ◽  
Iron And Steel ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Mineral Components ◽  
Physical Mechanic

The converter steel slag chemical and mineral components in China?s main steel plants have been analysed in the present paper. The electronic microscope, energy spectrum analysis, X-ray diffraction analysis confirmed the main mineral compositions in the converter slag. Converter slag of different components were grounded to obtain a powder with specific surface area over 400m2/kg, making them to take place some part of the cement in the concrete as the admixture and carry out the standard tests. The results indicate that the converter slag can be used as cementitious materials for construction. Furthermore, physical mechanic and durability tests on the concrete that certain amount of cement be substituted by converter steel slag powder from different steel plants are carried out, the results show that the concrete with partial substitution of steel slag powder has the advantages of higher later period strength, better frost resistance, good wear resistance and lower hydration heat, etc. This study can be used as the technical basis for ?Steel Slag Powder Used For Cement And Concrete?, ?Steel Slag Portland Cement?, ?Low Heat Portland Steel Slag Cement?, ?Steel Slag Road Cement? in China, as well as a driving force to the works of steel slag utilization with high-value addition, circular economy, energy conservation and discharge reduction in the iron and steel industry.

scholarly journals Experimental Study on the Effect of Compound Activator on the Mechanical Properties of Steel Slag Cement Mortar

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 658
Author(s):  
Junfeng Guan ◽  
Yulong Zhang ◽  
Xianhua Yao ◽  
Lielie Li ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
Steel Slag ◽  
Cementitious Materials ◽  
Control Group ◽  
Optimal Dosage ◽  
Slag Powder ◽  
Mortar Strength ◽  
Steel Slag Powder

In this study, activator, metakaolin, and silica fume were used as a compound activator to improve the activity of steel slag powder. The influence of activator, steel slag powder, metakaolin, and silica fume on the resulting strength of steel slag cement mortar was investigated by orthogonal experiments. For four weight fractions of steel slag powder (10%, 20%, 30%, 40%), the experimental results indicate that the compressive strength of mortar can reach up to more than 85% of the control group while the flexural strength can reach up to more than 90% of the flexural strength of the control group. Through orthogonal analysis, it is determined that the activator is the primary factor influencing the mortar strength. According to the result of orthogonal analysis, the optimal dosages of activator, steel slag powder, metakaolin, and silica fume are suggested. The GM (0, N) prediction model of compressive strength and flexural strength was established, and the compressive strength and flexural strength of mortar with the optimal dosage combinations were predicted. The prediction results show that by using the optimal dosage combination, the mortar strength can reach the level of P·O·42.5 cement. Considering the different strength and cost requirements of cementitious materials in practical engineering, the economic benefits of replacing cement with steel slag powder activated by compound activator in various proportions and equal amounts were presented. The results show that the method proposed in this study can reduce the cost of cementitious materials.

scholarly journals Effect of nano and micro conductive materials on conductive properties of carbon fiber reinforced concrete

2020 ◽  
Vol 9 (1) ◽  
pp. 445-454 ◽  
Author(s):  
Juhong Han ◽  
Dunbin Wang ◽  
Peng Zhang
Keyword(s):  
Carbon Fiber ◽  
Carbon Black ◽  
Steel Slag ◽  
Pressure Sensitivity ◽  
Electric Conduction ◽  
Conductive Materials ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Resistivity Variation ◽  
Nano Carbon

AbstractIn this study, the pressure sensitivity and temperature sensitivity of the diphasic electric conduction concrete were investigated by measuring the resistivity using the four-electrode method. The diphasic electric conduction concrete was obtained by mixing nano and micro conductive materials (carbon nanofibers, nano carbon black and steel slag powder) into the carbon fiber reinforced concrete (CFRC). The results indicated that, with the increase of conduction time, the resistivity of CFRC decreased slightly at the initial stage and then became steady, while the resistivity of CFRC containing nano carbon black had a sharp decrease at the dosage of 0.6%. With the increase of compression load, the coefficient of resistivity variation of CFRC containing nano carbon black and steel slag powder changed little. The coefficient of resistivity variation increased with the increase of steel slag powder in the dry environment, and CFRC had preferable pressure sensitivity when the mass fractions of carbon fiber and carbon nanofiber were 0.4% and 0.6%, respectively. Besides, in the humid environment, the coefficient of resistivity variation decreased with the increase of steel slag powder, and the diphasic electric conduction concrete containing 0.4% carbon fibers and 20% steel slag powder had the best pressure sensitivity under the damp environment. Moreover, in the dry environment, CFRC containing nano and micro conductive materials presented better temperature sensitivity in the heating stage than in the cooling stage no matter carbon nanofiber, nano carbon black or steel slag powder was used, especially for the CFRC containing steel slag powder.

The Properties of Flue Gas Desulphurization (FGD) Gypsum

2011 ◽  
Vol 105-107 ◽  
pp. 2204-2208 ◽  
Author(s):  
Run Xia Hao ◽  
Xiao Yan Guo
Keyword(s):  
Mechanical Properties ◽  
Flue Gas ◽  
Steel Slag ◽  
Optical Microscope ◽  
Cementitious Material ◽  
Fgd Gypsum ◽  
Technical Performance ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Flue Gas Desulphurization

The properties of flue gas desulphurization (FGD) gypsum were analysized by Thermo-gravimetry/differential scanning calorimetry (TG/DSC), technical performance analysis, optical microscope and Scanning electron microscope (SEM). Mechanical properties of FGD gypsum-steel slag powder cementitious material were researched. The results revealed that FGD gypsum have similar moisture content, major component CaSO4·2H2O with natural gypsum, and has better technical performance than natural gypsum. The results of optical microscope and SEM of the FGD gypsum hydration support this further. When the dosage of steel slag powder is 15%, containing activator ,better mechanical properties can be obtained. Key words: FGD gypsum, Property, Cementitious material

Quaternary blended cement mortars containing wood ash, glass and slag powders

2021 ◽  
Author(s):  
Eethar Thanon Dawood ◽  
Marwa Saadi Mhmood
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Glass Powder ◽  
Steel Slag ◽  
Wood Ash ◽  
Supplementary Cementitious Materials ◽  
Partial Replacement ◽  
Slag Powder ◽  
Steel Slag Powder

AbstractA quaternary supplementary cementitious materials as partial replacement of ordinary Portland cement decreases CO2 emission. This paper has investigated the properties of mortars made from different quaternary blends of wood ash, steel slag powder and glass powder with ordinary Portland cement at different replacement levels of 0, 24, 25, and 30% by weight of the binder. The blended mortar mixtures tested for flow, compressive strength and density. The results showed that the flow of mortars is decreased with the combined use of steel slag powder, glass powder, and wood ash compared with control mix. Compressive strength reduced with the combination of steel slag powder, glass powder and wood ash but this reduction effects is acceptable especially at 24% replacement contain super-plasticizer compared with the ecological benefit.

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