High dosages of set accelerator in fibre reinforced shotcrete

• Aluminium sulphate-based shotcrete set accelerators (also called activators) are known to influence the rate of early-age hydration in shotcrete. This is the primary motivation for their widespread use throughout the mining and tunnelling industries. However, these admixtures are also known to change the degree of compaction that can be achieved with a given shotcrete mix and they can alter the age-dependent post-crack performance of Fibre Reinforced Shotcrete (FRS). The present investigation was undertaken to assess the magnitude and character of these changes in performance as the dosage rate of set accelerator is raised to higher than normal rates. Copyright ASCE 2006.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering (hsv//eng)

Keyword

Compaction

Hydration

Shotcreting

Tunneling (excavation)

Dosage rates

Fibre Reinforced Shotcrete (FRS)

Set accelerators

Fiber reinforced materials

Publication and Content Type

ref (subject category)

kon (subject category)