Mechanical properties of grouts at various curing times

Mechanical properties of grouts at various curing times

The uniaxial compressive strength, elastic modulus and creep of two commonly used grout products in Australian coal mining industry, Jennmar Bottom-Up 100 (BU100) and Orica Stratabinder HS were studied. A 50 mm cube mould was used to cast samples. The Uniaxial compressive strength of
the samples with curing time, ranging from 1 to 28 days was determined, using an Avery compression testing machine. Secant, tangent and 50 kN range elastic modulus of grout products were investigated under cyclic loading at a 1 mm/min loading rate. Both strain gauged and non-strain gauged samples were tested for determination of the elastic modulus in compression. Strain gauged samples were
prepared to evaluate creep values of BU 100 and Stratabinder HS under 100 kN compression load for
15 min. It was found that Stratabinder HS had higher uniaxial compressive strength and elastic modulus
after a day of curing in comparison to BU 100. Stratabinder HS showed lower creep values by 0.04% when compared with BU 100.

No paper in these proceedings is to be re-published unless with written permission from the conference organisers and/or the original authors who maintain the copyright for
their work.