foundation system of burj al arab

How to Solve Alkali-Silica Reaction in Concrete Having Glass Sand Aggregates? (Part-2)

We were discussing about alkali silica reaction (ASR) in concrete due to application of glass as partial or full replacement of natural aggregates. An interesting fact is that remedial measure lies in glass itself i.e. if we ground glass to certain fineness it shows pozzolanic characteristics.

Dear readers we like to include that glass are inspected for both coarse aggregates and fine aggregates. In case of coarse aggregates, workability of concrete is impaired badly; we have discussed this in our previous post. This is also worth mentioning that glass means waste glass as a recycled product; this is also discussed in the previous post.

Cracks in concrete pavement due to alkali-silica reaction

Matakaolin for alkali-silica reaction suppressor for glass concrete
Dear reader while we are discussing about solving deleterious expansion of alkali silica reaction, we have to know ASR suppressor that can be use to control such reaction; here we are listing some of these but as a general ASR suppression not considering ASR related to Glass application:

a. Fine siliceous materials

b. Application of pozzolana

c. Silica fume

d. Ground granulated blast furnace slag (GGBS)

e. Lithium salts like lithium nitrate

f. Matakaolin

Dear reader we will discuss each of this ASR suppressors in our upcoming post. Of these finely divided siliceous material, replacing cement with GGBS, fly ash, silica fume or by adding steel fibres and lithium carbonate and lithium chloride are examined. In these experiments the constituents percentage are altered to have best results. We will discuss about these tests and their results in next part of this topic. Please stay with us.

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