Conforming to ASTM C512 – Standard Test Method for Creep of Concrete in Compression:
- The Concrete Creep Testing Machine is designed for determining the creep characteristics of concrete cylindrical specimens subjected to sustained longitudinal compressive loading in accordance with ASTM C512. The system is suitable for testing concrete in which the nominal maximum size of coarse aggregate does not exceed 50 mm.
Scope of Supply:
The complete system consists of the following main units:
- Loading Frame
- Hydraulic Power Pack
- Hydraulic Jack
- Data Acquisition System (DAQ) with Strain Gauges
- Load measuring system - with the help of load cell
Loading Frame:
- Will accommodate three concrete specimens of 150 mm diameter × 300 mm height simultaneously.
- Will have a maximum loading capacity of 1000 kN.
- Will consist of a rigid loading frame incorporating upper and lower loading platens between which the test specimens are positioned.
- Will be equipped with high-compression springs designed to maintain a constant sustained compressive load on the specimens throughout the duration of the creep test.
- Will ensure uniform load distribution and long-term load stability during extended testing periods.
Hydraulic Power Pack:
- Will be of hand operated and designed for continuous operation.
- The machine will be fitted with polydydron pump
- Will include dedicated hydraulic control levers for:
- Pressure application.
- Controlled pressure release.
Hydraulic Jack:
- Will comprise a precision-machined hydraulic cylinder and piston assembly.
- Maximum load capacity: 1000 kN.
- Piston stroke: 100 mm.
- Will be designed to provide smooth and uniform load transfer to the loading frame.
Strain Measurement System:
The system will be supplied complete with:
- 10 Nos. Electrical Resistance Strain Gauges
- Type: BF120
- Gauge Length: 60 mm
- Resistance: 120 Ω
- Lead Wire Length: 25–30 mm
- Epoxy adhesive for bonding the strain gauges to the concrete specimens.
- Soldering cables and all necessary accessories required for installation and connection of the strain gauges.
The strain measurement system will have:
- Strain resolution: 1 microstrain (1 με).
- Strain measurement accuracy: ±1% or better.