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.

Effect of steel slag powder, fly ash, and silica fume on the mechanical properties and durability of cement mortar

2019 ◽  
Vol 9 (9) ◽  
pp. 1049-1054
Author(s):  
Yunxia Lun ◽  
Fangfang Zheng
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Silica Fume ◽  
Cement Mortar ◽  
Steel Slag ◽  
Mineral Admixtures ◽  
Partial Replacement ◽  
Slag Powder ◽  
Steel Slag Powder

This study is aimed at exploring the effect of steel slag powder (SSP), fly ash (FA), and silica fume (SF) on the mechanical properties and durability of cement mortar. SSP, SF, and FA were used as partial replacement of the Ordinary Portland cement (OPC). It was showed that the compressive and bending strength of steel slag powder were slightly lower than that of OPC. An increase in the SSP content caused a decrease in strength. However, the growth rate of compressive strength of SSP2 (20% replacement by the weight of OPC) at the curing ages of 90 days was about 8% higher than that of OPC, and the durability of SSP2 was better than that of OPC. The combination of mineral admixtures improved the later strength, water impermeability, and sulfate resistance compared with OPC and SSP2. The compressive strength of SSPFA (SSP and SF) at 90 days reached 70.3 MPa. The results of X-ray diffraction patterns and scanning electron microscopy indicated that SSP played a synergistic role with FA or SF to improve the performance of cement mortar.

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.

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.

Application of Sanming Steel Slag Powder in Cement and Concrete

2010 ◽  
Vol 168-170 ◽  
pp. 369-372
Author(s):  
Dong Mei Zhang ◽  
Ming Shi Lu ◽  
Feng Xing Liu
Keyword(s):  
Blast Furnace Slag ◽  
Steel Slag ◽  
Slag Powder ◽  
Mortar Strength ◽  
Setting Times ◽  
Steel Slag Powder ◽  
Rate Of Increase ◽  
Cement And Concrete ◽  
Mineral Additives ◽  
Furnace Slag

Effects of steel slag powder on properties of cement and concrete are investigated. Results show that with the increase of steel slag power, water requirement of normal consistency is decreased, and the setting times are prolonged. The early mortar strength is lower, but late strength rate of increase is great. Steel slag powder is compatible with blast furnace slag. Moreover，concrete，which has harmonious development strength and excellent workability can be obtained by mineral additives two-element compounding.

Influence of Steel Slag on Compressive Strength and Durability of Concrete

2011 ◽  
Vol 704-705 ◽  
pp. 1051-1054
Author(s):  
Jian Ping Zhu ◽  
Qi Lei Guo ◽  
Xiang Gao ◽  
Dong Xu Li
Keyword(s):  
Compressive Strength ◽  
Research Study ◽  
Coarse Aggregate ◽  
Reference Sample ◽  
Steel Slag ◽  
Concrete Durability ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Strength And Durability ◽  
Better Than

The present research study investigates the compressive and durable properties of concretes with steel slag, a by-product of the conversion process of iron to steel. For this purpose, a reference sample and twenty-four concretes containing steel slag were tested. The steel slag fraction used was “5–20 mm”, and the surface area of steel slag powder was 450m2/kg. Compressive strength at 7 and 28 days, and chloride penetration properties were measured. It is concluded that steel slag can be used in the production of concrete. In addition, the steel slag concretes present satisfactory physical properties. When proper amount of steel slag powder and steel slag fraction were used the concrete properties can be better than the blank one. Keywords: Steel slag, cement, coarse aggregate, concrete, durability

Influence of Steel Slag Powder with Different Specific Surface Area on the Properties of Foam Concrete

2012 ◽  
Vol 575 ◽  
pp. 95-99 ◽  
Author(s):  
Dong Lin He ◽  
Hong Qiang Liao ◽  
Zhan Cheng Guo ◽  
Sain Baatar ◽  
Guang Wei Yu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Steel Slag ◽  
Strength Test ◽  
Foam Concrete ◽  
Slag Powder ◽  
Steel Slag Powder

Some properties of foam concrete added steel slag powder with different specific surface area were studied in this paper. The property and microstructure of the foam concrete were investigated by strength test, XRD and SEM. The results indicate that the compressive strength increases firstly and then decreases with increase of the specific surface area of steel slag powder.

Effects of Steel Slag Powder on Performance of Concrete

2010 ◽  
Vol 163-167 ◽  
pp. 1605-1608
Author(s):  
Jin Xia Zhang ◽  
Shu Xian Liu ◽  
Fu Sheng Niu ◽  
Yi Miao Nie
Keyword(s):  
Compressive Strength ◽  
Specific Surface ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Powder Content

Slump and compressive strength of the concrete with different steel slag powder content and different finenesses were discussed in this paper. It was indicated that: 1) High performance concrete with higher strength can be made using ground steel slag powder. 2) The greater content of steel slag powder, the more obvious was the effect of reducing slump losing. 3) About 40MPa concrete can be made using the steel slag powder whose specific surface was 510~600m2/kg under the condition that the content of steel slag powder was 50%~60%. 4) When the content of steel slag to be certain, the finenesses of steel slag powder had little effect on the performance of concrete.

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