Skip to main content

Table 1 Sources of input parameters.

From: Evaluation of Models for Estimating Shrinkage Stress in Patch Repair System

Information related to input parameters

Source of data

Material

Shrinkage

Creep

Elastic modulus

Repair material and substrate are concrete with compressive cube strength of 48 and 52 MPa at 28 days, respectively; thickness of repair material and substrate are 50 and 100 mm, respectively

Specimen: prism of 400 × 10 × 100 mm; tested according to Swedish Standard SS 13721; measurement started 7 days after casting

Specimen: prism 400 × 100 × 100 mm, loaded incrementally in compression; measurement started at 7 days after moistening

Estimated to E = 34 GPa through evaluation of compressive stress on cubes

Silfwerbrand (1996)

Repair material is high performance shrinkage compensated repair concrete; substrate concrete is normal concrete; thickness of repair material and substrate are 25 and 50 mm, respectively

Specimen: prism of 285 × 25 × 25 mm; sealed in aluminium foil for 7 days prior to curing

Specimen: prism of 300 × 40 × 40 mm loaded in tensile creep rig

Evaluated according to ASTM C 307-94

Baluch et al. (2002), Carlsward (2006)

Repair material is mortar while substrate is concrete having compressive strength of 25 MPa; thickness of repair material and substrate are 30 and 150 mm, respectively

Specimen: cylinder of 7.5 × 275 mm; measurement started at 1 days after casting

Specimen: prism of 500 × 100 × 100 mm loaded in flexure; measurement started at 1 days after casting

Specimen:prism of 500 × 100 × 100 mm; tested in flexure in which stress and strain relationship in tension was determined

Kristiawan et al. (2009)

Repair material is fibre reinforced concrete with strength at 28 days is 51.5 MPa; thickness of repair and substrate concrete are 50 and 300 mm, respectively

Specimen: prism of 500 × 100 × 50 mm; measurement started 5 days after curing

Specimen: cylinder of 150 × 300 mm loaded in compression

Estimated based on compressive strength using CEB FIP MC90

Carlsward (2008), Rahman et al. (2000)