alkali activated slag

"Alkali-activated Natural Pozzolan/Slag Mortars: A ...

The performance of alkali-activated natural pozzolan/slag mortars were also compared with the performance of Portland cement mortars. The results of this study revealed that in comparison with the Portland cement mortars, alkali-activated natural pozzolan/slag mortars generated significantly lower heat, thus offering a great benefit to mass ...

ALKALI-ACTIVATED COMPOSITES BASED ON SLAGS FROM …

Slag as a secondary raw material from metallurgy is most often heaped in slag disposal areas without any pro-fit. This paper deals with alkali activated slag from iron and steel production which can be used in the building industry. Products of alkali slag activation fulfil the role of inorganic binders.

Alkali-activated slag cement and concrete: a review of ...

This paper summarizes the advantageous and disadvantageous properties of alkali-activated slag cement and concrete by reviewing previously published work in English, Russian and Chinese.

The hydration of slag, part 1: reaction models for alkali ...

Researches on the alkali-activated slag (AAS) grew remarkably in the recent decades because of its numerous advantages such as fast development of strength, high resistance to chemical attack, and low heat release, if compared to normal Portland cement [1]. Furthermore, since the slag is an industrial

Long Term Performance of Alkali Activated Slag Concrete

This paper reports on an experimental program investigating the durability and mechanical properties of alkali activated slag concrete (AASC). The AASC was prepared using ground granulated blast ...

Effect of Reactive Magnesium Oxide on Properties of Alkali ...

Alkali-activated slag (AAS) binders have taken a great interest due to its manufacturing process which has important benefits from the point of view of the lower energy requirements and lower emission of greenhouses gases with respect to the

Properties of Alkali Activated Slag Mortar after Exposure ...

the manufacturing of Portland cement [1-2]. Alkali activated slag is a kind of alkali activated material which is the alkali activation of calcium-rich blast furnace slag (referred to slag hereafter unless otherwise stated) and the main reaction products are the amorphous Na-substituted C-N-S-H gels with low Ca to Si ratio.

Carbonation Characteristics of Alkali-Activated Blast ...

Alkali-activated ground granulated blast-slag (AAS) is the most obvious alternative material for ordinary Portland cement (OPC). However, to use it as a structural material requires the assessment and verification of its durability. The most important factor for a durability evaluation is the degree ...

Alkali Activated Systems - ASU Digital Repository

Alkali Activated Systems Understanding the Influence of Curing Conditions and Activator Type/Chemistry on the Mechanical Strength and Chemical Structure of Fly Ash/Slag Systems by Ussala Chowdhury A Thesis Presented in Partial Fulfillment of the Requirements for the Degree Master of Science Approved July 2013 by the

Alkali-Activated Cements and Concretes - Caijun Shi, Della ...

The first English-language book which reviews and summarizes worldwide research advances in alkali-activated cements and concrete. Essential topics include: raw materials and their properties for the production of the two new types of binder the hydration and microstructure development of alkali-activated slag cements the mechanical properties and durability of alkali-activated slag cement …

A review: The comparison between alkali-activated slag (Si ...

This paper reviews current knowledge about the comparison between alkali-activated slag (Si+Ca) and metakaolin (Si+Al) cements, including the general properties of slag and metakaolin, hydration products reaction mechanisms, and the role of Ca and Al.

Hydration and Properties of Slag Cement Activated by ...

Measuring the Chemical Shrinkage of Alkali-Activated Slag Cements Using the Buoyancy Method. Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete: A Tribute to Zdeněk P. Bažant September 2013 . Fiber-Matrix Bond Characteristics of Alkali-Activated Slag …

Effect of slag chemistry on the hydration of alkali ...

Formation rates of β-silico-molybdic acid for alkali activated binders with different CaO/SiO 2 ratios of the slag activated with a NaOH and b K-WG-1 as well as binders with different Al 2 O 3 contents of the slag activated with c K-WG-1 and d K-WG-2 at different age

Alkali-activated slag concrete: Fresh and hardened ...

The behaviour of fresh and hardened alkali-activated slag (AAS) and OPC concretes was compared and the effect of mixing time assessed. OPC and AAS concrete slump and rheological results proved to differ, particularly when the slag was activated with waterglass (WG).

Geopolymer cement - Wikipedia

Geopolymer cement is a binding system that hardens at room temperature, similar to the more widely-known Portland cement.

Effect of internal sulfate attack on the properties of ...

AbstractThis work aims at studying the effect of internal sulfate attack on the properties of sulfate-resisting cement (SRC) and alkali-activated slag (AAS). Blast-furnace slag was activated by 3% sodium hydroxide (NaOH) and 3% sodium silicate (Na2SiO3) by weight of slag.

Preparation and Properties of Alkali-Activated Ground ...

PREPARATION AND PROPERTIES OF ALKALI-ACTIVATED GGBFS THERMAL STORAGE CONCRETE 271 et al. (2012) utilized slag cement, sand, and …

Present State and Future of Alkali-Activated Slag Concretes

The finely ground slag, usually granulated blast furnace slag, is activated by the solution of sodium or potassium hydroxide, carbonate, or preferably silicate (soluble …

Resistance of alkali-activated slag concrete to acid attack

The durability of alkali-activated slag (AAS) concrete exposed to acid attack was investigated. To study resistance of AAS concrete in acid environments, AAS concrete was immersed in an acetic acid solution of pH = 4. The main parameters studied were the evolution of compressive strength, products ...

Enhanced characteristics of alkali activated slag/ grog ...

slag, with clay brick waste (grog) in a ratio ranging from 0 up to , and with a fine sand ratio of 15% of the total weight. Also, sodium hydroxide activator was used in aratio of 8% of the total weight.

Properties and durability of alkali-activated ladle slag ...

This paper examines the durability of alkali activated ladle slag mortars. Ladle slag, currently an under-utilized crystalline metallurgical by-product, is a promising raw material for alkali activation. However, there is no information about the durability of this material. The aim of this study is ...

Alkali-Activated Slag Cement Concrete

Alkali-activated slag cement concrete (AASCC) has recently attracted interest due to its low environmental impact. This binder has exhibited excellent mechanical strength and durability, but some mixtures have demonstrated short setting times or excessive shrinkage.

Effect of Curing Conditions on the Compressive Strength ...

The strength development of alkali activated slag cement concrete cured in water bath, sealed and exposed to air conditions was studied earlier [2]. They have reported that when the

Why Alkali-Activated Materials are NOT Geopolymers ...

Prof. J. Davidovits explains the main differences between AAC (Alkali-Activated Cement or Concrete), AAS (Alkali-Activated Slag), AAF (Alkali-Activated Fly Ash) and Slag-based Geopolymer cement, in terms of chemistry, molecular structure, long-term durability.

A review: The comparison between alkali-activated slag (Si ...

Based on varies researches on alkali-activated cements, it is generally accepted that they are two different concepts of alkali-activated GGBFS and geopolymer. Alkali activation of GGBFS is a model of (Si + Ca) system, and geopolymer is a kind of (Si + Al) cement with metakaolin and fly …

Handbook of alkali-activated cementes, mortars and ...

"This handbook is a great impetus for an accelerated commercialization of an eco-friendly alternative binder technology with more in-depth understanding of its …

Final Report | Alkali-Activated Slag Cements as a ...

Applied science has been used to guide the development of viable alternative cements. Long term, this would enable the use of many slags and fly ashes as alkali-activated cements by providing the critical link between component chemistry and the proper mix design using those components to achieve the desired bulk performance.

FTIR Analysis of Alkali Activated Slag and Fly Ash Using ...

FTIR Analysis of Alkali Activated Slag and Fly Ash Using Deconvolution Techniques by Sateesh Babu Madavarapu A Thesis Presented in Partial Ful llment