scholarly journals Applications of Steel Slag Powder and Steel Slag Aggregate in Ultra-High Performance Concrete

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Jin Liu ◽  
Runhua Guo
Keyword(s):  
Water Content ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Control Sample ◽  
Concrete Fracture ◽  
Ultra High Performance Concrete ◽  
Replacement Ratio ◽  
Slag Powder ◽  
Steel Slag Powder

The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete fracture surface. The results show that the fluidity of the paste containing steel slag is higher. The nonevaporable water content of the hardened paste containing steel slag powder is close to that of the control sample at late ages. Both steel slag powder and steel slag aggregate react and connect tightly to gels and hardened paste, respectively. When the cement replacement ratio is no more than 10%, the proportion of pores larger than 50 nm in the hardened paste containing steel slag powder is close to that of the control sample, and the UHPC containing steel slag powder can display satisfactory compressive strengths. The UHPC containing steel slag aggregate demonstrates higher compressive strengths.

Study on Interfacial Properties of Ultra-High Performance Concrete Containing Steel Slag Powder and Fly Ash

2011 ◽  
Vol 194-196 ◽  
pp. 956-960 ◽  
Author(s):  
Yan Zhou Peng ◽  
Kai Chen ◽  
Shu Guang Hu
Keyword(s):  
Fly Ash ◽  
Bond Strength ◽  
High Performance ◽  
Steel Fiber ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Interfacial Zone ◽  
Ultra High Performance Concrete ◽  
Slag Powder ◽  
Steel Slag Powder

The interfacial properties of reactive powder concretes (RPCs), other known as ultra-high performance concrete (UHPC), containing steel slag powder and ultra fine fly ash are studied in this paper. The microstrctural characterization of interfacial transition zones (ITZs), including the aggregate-cement paste interfacial zone and the steel fiber-paste interfacial zone, is investigated by SEM. The microhardness of the aggregate-paste ITZ and the steel slag-paste ITZ is studied and the bond strength of steel fiber in matrix is tested through fiber pullout tests. The results indicate that the microhardness of the steel slag-paste ITZ is slightly higher than that of the aggregate-paste ITZ, which implies the advantage of the substitution of quartz powder with steel slag powder in preparation of RPCs to some degrees. Moreover, the hardness of these two ITZs is higher than that of the hardened paste. A certain amount of hydration products has been observed exsiting on the surface of steel fiber by SEM and the bond strength of steel fiber-martix is up to 9.3MPa. These interfical properties are definitely critical to obtain high performance of UHPCs containing steel slag powder and fly ash.

scholarly journals Effects of Steel Slag Powder and Expansive Agent on the Properties of Ultra-High Performance Concrete (UHPC): Based on a Case Study

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 683
Author(s):  
Shunkai Li ◽  
Shukai Cheng ◽  
Liwu Mo ◽  
Min Deng
Keyword(s):  
Temperature Rise ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Adiabatic Temperature ◽  
Hydration Heat ◽  
Ultra High Performance Concrete ◽  
Adiabatic Temperature Rise ◽  
Slag Powder ◽  
Steel Slag Powder

In view of the performance requirements of mass ultra-high performance concrete (UHPC) for the Pang Gong bridge steel cable tower in China, the UHPC incorporating of steel slag powder and hybrid expansive agents is optimized and prepared. The effects of steel slag powder and hybrid expansive agents on the hydration characteristics and persistent shrinkage of UHPC are investigated. The results indicate that 15 wt.% steel slag powder and 5 wt.% hybrid expansive agents can effectively reduce the drying shrinkage deformation of UHPC with a slight decrease of strength. Heat flow calorimetry results show that the incorporation of steel slag powder and expansive agents decreases the hydration heat at three days. Moreover, the obtained adiabatic temperature rise of UHPC is 59.5 °C and the total shrinkage value at 180 days is 286 με. The hydration heat release changes of large volume UHPC in the steel-concrete section of cable tower is agreed with the result of adiabatic temperature rise in the laboratory.

Durability and Microstructure of Ultra-High Performance Concrete Having High Volume of Steel Slag Powder and Ultra-Fine Fly Ash

2011 ◽  
Vol 255-260 ◽  
pp. 452-456 ◽  
Author(s):  
Yan Zhou Peng ◽  
Kai Chen ◽  
Shu Guang Hu
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Mercury Porosimetry ◽  
Steel Slag ◽  
Mineral Admixtures ◽  
Ultra High Performance Concrete ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Small Pore

The durability, such as chloride ion permeability, freeze-thaw and sulfate attack resistance of ultra-high performance concrete (UHPC) having a large amount, ranged from 42% to 48% by weight of binder, of mineral admixtures including steel slag powder (SS), ultrafine fly ash (UFFA) and silica fume (SF) was studied and the microstructure of selected UHPC compositions was investigated by Mercury porosimetry in this paper. Moreover, the relationship between durability and microstructure of UHPC was analyzed. The mercury porosimetry studies demonstrated the very low porosity and a high proportion of the innocuous pores as well as the very small pore size in UHPCs, whose most probable pore diameter did not exceed 10 nm. This porous structure of UHPCs would definitely enable the material have excellent durability.

Effect of Steel Slag Powder on the Durability of High Performance Concrete

2009 ◽  
Vol 79-82 ◽  
pp. 175-178 ◽  
Author(s):  
Yun Feng Li ◽  
Yang Liu ◽  
Rong Qiang Du ◽  
Fan Ying Kong
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Effective Means ◽  
Steel Slag ◽  
Chloride Penetration ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Partial Replacement ◽  
Slag Powder ◽  
Steel Slag Powder

dvanced mineral admixtures can lead to economical high performance concrete with enhanced durability and reduced cement content. When super fine steel slag powder is mixed into concrete as active admixture, resistance to abrasion and resistance to chloride penetration are improved as well as workability and mechanical properties of the concrete. Resistance to abrasion of steel slag concrete is measured and resistance to chloride penetration is also determined by the method of NEL and ASTM C1202 in this paper. Result shows that compound mineral admixtures as partial replacement for Portland cement in mortar enhance abrasion resistance. Mixing mineral admixture is an effective means for controlling the chloride permeability. Concrete specimens prepared with compound mineral admixture with steel slag powder and blast furnace slag powder has very low permeability.

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.

Effectiveness of Steel Slag Powder on Suppressing Alkali Aggregate Reaction of Concrete

2009 ◽  
Vol 79-82 ◽  
pp. 179-182 ◽  
Author(s):  
Yun Feng Li ◽  
Shu Ai Liu ◽  
Rong Qiang Du ◽  
Fan Ying Kong
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Effective Means ◽  
Steel Slag ◽  
Test Method ◽  
Mineral Admixtures ◽  
Partial Replacement ◽  
Slag Powder ◽  
Alkali Aggregate Reaction ◽  
Steel Slag Powder

Concrete properties can be greatly improved with the advanced mineral admixtures such as steel slag powder. Used in combination with Super-plasticizer admixture, steel slag powder can lead to economical high performance concrete with enhanced durability and reduced cement content. The effectiveness of steel slag powder on suppressing Alkali Aggregate Reaction is analyzed. The effectiveness of steel slag powder on suppressing AAR expansion was assessed using the method of ASTM C441 and accelerated test method. Results show that mineral admixtures with steel slag powder as partial replacement for Portland cement in concrete is an effective means for controlling expansion due to AAR. At most a 50% decrease in expansion rate of mortar bars can be found.

Microstructure and Properties of High Performance Concrete with Steel Slag Powder

2011 ◽  
Vol 675-677 ◽  
pp. 503-506
Author(s):  
Yun Feng Li
Keyword(s):  
Cement Paste ◽  
High Performance ◽  
High Performance Concrete ◽  
Cement Mortar ◽  
Steel Slag ◽  
Drying Shrinkage ◽  
Mineral Admixture ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Active Admixture

As an active admixture, super fine steel slag powder can be mixed into concrete to produce high performance concrete. The microstructures between cement paste mixed with steel slag powder and plain cement paste are experimentally studied. The SEM of the microstructures shows that microstructure of cement paste are changed by active mineral admixture, the internal structure of the cement paste are improved. Drying shrinkage of cement mortar with different steel slag kinds and different dosage of admixtures are measured. Experiments results show the effect of steel slag powder on drying shrinkage of cement mortar.

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