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 | |
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 |