Determining the Amount of Reacted Slag in Blended Cement Using EDTA Method

1 Procedure of EDTA

A typical chemical reaction of a slag could be like the following [NIST, D.P Bentz],

C7.88S7.39M3A + 2.6CH + bH → 7.39C1.42SHmA0.046 + 0.66M4.6AHd

C=CaO, S=SiO2, M=MgO, A=Al2 O3, CH=Ca(OH)2, H=H2O.

The method EDTA (Ethylenediaminetetraacetic acid) has been described by Erntro......

Concrete made with slag improves resistance to fire damage

Better performance of slag concrete exposing to high temperatures

Concrete made with GGBS cement is much better than concrete made with 100% OPC at maintaining its compressive strength when exposed to high temperatures.

OPC specimens heated to 400 °C or above have been shown to exhibit severe crac......

Does particle size of slag influence its reactivity?

It is mentioned previously that the reactivity of slag is influenced by its fineness of grinding (specific surface area) that is determined by the sizes of slag particles. The finer the slag particles, the larger the surface area, which means higher hydration degree of slag.

However, if disregardin......