Does slag make concrete stronger?
Sewage-enhanced steel slag could be an excellent aggregate, researchers say. Concrete made with recycled steel slag is 17 percent stronger than traditional concrete.
Is Portland slag cement good for concrete?
PSC has been voted as the most suitable cement for concrete pavements, mass concrete applications, high performance or high strength concrete, structures and foundations, pre-cast concrete such as pipe & block, concrete exposed to sea water and marine application.
Is slag cement good for concrete?
Slag cement is most widely used in concrete, either as a separate cementitious component or as part of a blended cement. It works synergistically with portland cement to increase strength, reduce permeability, improve resistance to chemical attack and inhibit rebar corrosion.
What is the grade of Portland slag cement?
ACC Grade: Grade 43 – Grade 53 Portland Slag Cement.
What is slag cement disadvantages?
Disadvantages of Blast-Furnace Slag Cement Early Strength is low; therefore, it cannot be used in Reinforced Cement Concrete (RCC) works. As the initial setting time is high, this cement is not used for emergency or repair works.
Why is slag good for concrete?
It typically replaces part of the portland cement in concrete mixes. According to the Slag Cement Association, an industry trade group, incorporating slag cement as a supplement in concrete offers higher strength, reduced permeability and improved resistance to chemical attack.
What is the advantage of slag cement?
The benefits of using slag cement include: Improved workability. Easier placeability and finishabiltiy. Higher long-term compressive and flexural strengths. Reduced permeability.
Where is Portland slag cement used?
Portland slag cement is nowadays commonly used in general civil engineering construction works and is mainly preferred for construction of main structures and in coastal areas where excessive amount of chloride and sulphate are present. It is most useful in massive construction projects such as dams.
Where is portland slag cement used?
What is the difference between portland cement and slag cement?
The content of clinker in slag cement is less than that in Portland cement but the content of granular blast furnace slag is more. Slag cement has the following characteristics compared with Portland cement (see Table 4.6).
What are the properties of Portland slag cement?
Properties of Portland Slag Cement 1 It improves durability & resilience. 2 PSC has the lower evolution of heat. 3 The Slag cement is more resistant to the attack of weathering agencies. 4 It gives a smooth finish because the cement particles are more fineness.
What is the flexural strength of slag cement?
Increased flexural strength is evident in Figure 2, where 50 percent slag cement achieved a 20 percent strength improvement, even though total cementitious content was decreased by 52 lb/cu yd. Improved flexural strengths are attributed to the increased denseness of the paste and improved paste-aggregate bond.
What is the difference between slag cement and PSC cement?
The Slag cement is more resistant to the attack of weathering agencies. It gives a smooth finish because the cement particles are more fineness. The PSC Cement mainly used in mass concrete because its hydration is lower than that of ordinary portland cement.
How long does it take for slag cement to set?
Portland slag cement, which is most commonly used in the region, was used for the study complying with IS 455 [21]. Its specific gravity was 2.87 having initial and final setting times of 70 minutes and 480 minutes, respectively. For fine aggregate, natural sand was used, having a maximum size of 4.75 mm.