Alkali Activated Slag and its Resistivity to Sulfate Ahmed A. Amer *, Mohamed Arif Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt. Abstract — This paper reports the results of investigation on the influence of ethylene glycol (EG) addition on the physicochemical and mechanical properties of alkaliactivated slag (AAS) pastes as well as its resistivity to 5 % ...

 · A coppernickel slagbased alkaliactivated cementing material (CNSCM) for backfilling was prepared using coppernickel slag as a raw material and sodium silie (SS) as an activating agent. The effects of SS content (6%, 8%, and 10%) and curing humidity on the compressive strength of CNSCM were investigated using an electronic universal testing machine.

 · Alkaliactivated mixtures are advantageous materials, being more sustainable and environmentally friendly as they do not contain cement. In this study, ground granulated blastfurnace slag was activated with sodium hydroxide solution and liquid sodium silie. The use of ground waste glass as a source of silie instead of sodium silie was ...

Alkali activated slag mortar is mixed with various proportion of activator. And the tests are made eight times with different activator dosage for slag mortar. Then the test is made once again without activator. Water (slag + cement) ratio of is used for this test. Fly ash based geopolymer mortar is mixed various proportion of activator. And the tests are made eight times with different ...

Alkaliactivated slag (AAS) has emerged as an ecofriendly alternative to ordinary Portland cement (OPC) as a binder material. Compared with cement production, the production of AAS entails around 2550% lower CO2 emissions and more than 40% lower embodied energy [1,2]. AAS is typically prepared by mixing alkali solution with ground granulated blastfurnace slag (GGBFS), a byproduct of the ...

Strength and microstructure of alkaliactivated phosphorous slag binder: Effects of activator type/dosage and phosphorous slag chemical composition. Author. Huang, Z. (Tsinghua University, China) Wang, Q (Tsinghua University, China) Date. . Abstract. In this paper, the influence of sodium hydroxide and water glass of various modulus, as activators, on the compressive strength ...

well as the data of alkali activated slag concrete derived from Bernall et al. (AASC3) mix design with Si/Al ratio of (Bernal et al. 2012), which was close to Si/Al ratio of AASC1 = and AASC2 = (Adam 2009). Specimen preparations The mixing for AASC1 specimens was undertaken using a 25 liter concrete mixer. The mix was then poured into cylindrical molds (100 x 200 mm2) for ...

A multimethod approach was used for the investigation and comparison of alkaliactivated slag binders (AAS), pure slag and ordinary Portland cement (OPC). Xray fluorescence, Xray powder diffraction, granulometry, calorimetry, thermogravimetric analysis and environmental scanning electron microscope investigations of the microstructure with energy dispersive Xray analyses were used to ...

Strength and Durability Properties of Alkali Activated Slag and Fly AshBased Geopolymer Concrete. 2009. Vasugi Jegan. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Strength and Durability Properties of Alkali Activated Slag and Fly AshBased Geopolymer Concrete . Download ...

 · Alkaliactivated slag concretes were produced using the developed cements. Compressive strengths in the range from 30 to 85 MPa were achieved for the concretes at 28 d. The accelerating admixture increased 1d compressive strength for the alkaliactivated slag concretes cured at ambient temperature up to 25 MPa. The optimum concentration of sodium carbonate was .

 · Alkaliactivated slag (AAS) has a great potential for using industrial byproducts. The production of AAS concretes is associated with low energy consumption and low CO 2 emission. The alkaline activation of slag has been studied [1–6]. Its main reaction product is a lowcrystalline hydrated calcium silie. When compared with Portland ...

Alkali activated slagfly ash binders Citation for published version (APA): Gao, X. (2017). Alkali activated slagfly ash binders: design, modeling and appliion. Technische Universiteit Eindhoven. Document status and date: Published: 11/12/2017 Document Version:

N2 The rheology of waterglass(Na2O·nSiO2· mH2O) and NaOHactivated slag pastes and mortars depends on the nature of the alkaline activator used: in waterglassactivated slag pastes and mortars, the extensive structural breakdown under shear makes the HerschelBulkley model a better fit to the down ramp of the flow curve, whereas NaOHactivated pastes and mortars, such as portlandcement ...

This study focused on the engineering properties of alkaliactivated slag (AAS) pastes prepared by mixing an activator consisting of sodium silie and sodium hydroxide at room temperature. The watertoslag ratio of AAS paste was kept constant at by mass. AAS pastes were prepared using the activator with five different silie moduli of 1,,,, and and three different Na ...

Interest in alkaliactivated slag as a construction material is increasing, primarily due to its environmentally friendly nature. Although strong alkaline activators, such as sodium hydroxide and sodium silie solution, are preferred for high strength, none of them exists naturally and their manufacturing process is quite energy intensive. Whilst sodium sulfate (Na2SO4) can be obtained .

This paper investigated the stabilization efficacy of alkaliactivated groundgranulated blast furnace slag (GGBS) for a marine soft clay, compared with that of portland cement (PC). The influence of activators, including NaOH, Na 2 CO 3, carbide slag (CS), NaOHCS, Na 2 CO 3CS, and Na 2 SO 4CS, on the stabilization efficacy was investigated ...

Alkali activated slag (AAS) offers opportunities to the construction industry as an alternative to ordinary Portland cement (OPC). The production of OPC and its use contributes significantly to release of CO2 into the atmosphere while AAS is an industrial byproduct that contributes much less to the environmental footprint that needs to be recycled if not landfilled.

The objective of this work was to determine the mechanisms that govern the setting times of alkaliactivated slag (AAS) cement pastes, as a function of the nature of the alkaline activator used.

 · 27 min, 62 , 6901 on the icon on the right to watch it fullscreen. Part 1 (2014): AAM are not geopolymers, two different chemistries. Prof. J. Davidovits explains the main differences between AAC (AlkaliActivated Cement or Concrete), AAS (AlkaliActivated Slag), AAF (AlkaliActivated Fly Ash) and Slagbased Geopolymer cement, in terms of chemistry, molecular .

Alkaliactivated blast furnace slag cements have been studied since the 1930s due to its high compressive strength, they can exceed 100 MPa in 28 days. The low Ca/Si ratio in slag improves its resistance to aggressive chemical materials such as acids, chlorides and sulphates [3,4,5]. Blast furnace slag is a highly heterogeneous material. It is well known that its chemical composition affects ...