After it has set, cement must not undergo any appreciable expansion, which could disrupt a mortar or concrete. This property of soundness is tested by subjecting the set cement to boiling in water or to high-pressure steam. Unsoundness can arise from the presence in the cement of too much free magnesia or hard-burned free lime
This method covers determination of the autoclave expansion of Portland cement by means of a test of neat cement paste specimens, 25.4 X 25.4 X 285.8mm, which are moist cured for 24 hours +/- 1-1/2 hours and then exposed to action of steam under specified pressure for 3 hours. The rate at which pressure is increased in the beginning the test and released in the test are specified. Linear expansion is measured by micrometer comparator.
Silent Features:
Standard Accessories:
This method covers determination of the autoclave expansion of Portland cement by means of a test of neat cement paste specimens, 25.4 X 25.4 X 285.8mm, which are moist cured for 24 hours +/- 1-1/2 hours and then exposed to action of steam under specified pressure for 3 hours. The rate at which pressure is increased in the beginning the test and released in the test are specified. Linear expansion is measured by micrometer comparator.
Silent Features:
- Rust proof stainless steel pressure vessel
- Specially designed Steam Safety Valve, pressure control switch and Temp. control switch - Triple Safety precautions for operator safety
- Accurately Calibrated Pressure Gauge
- Guaranteed timings and performance as per IS 4031
Inside chamber dimensions | 10.5 cm dia x 40.5cm height. |
Rating | 3000 watts |
Pressure range | 21 kg/cm2 |
Least Count | 04 kg/cm2 |
Temp.range | 215 deg C |
Power supply | 230 Volts AC Single Phase 15 Amp |
Standard Accessories:
- Special rack to hold specimens above water level in the autoclave and in vertical position
- Pressure gauge with calibration report with national traceability
- Silicon rubber Gasket
- Spanner
- Length comparator with dial micrometer 0.002mm X 5mm
- shrinkage bar moulds(single/two/triple gang)
- PID Auto tuning Digital Temp. indicator cum controller with or without PC interface for data logging
- PID Auto tuning Digital Pressure indicator cum controller with or without PC interface for data logging
- Spare heater set
- Spare Silicon Gasket
- Spare Pressure gauge
- Spare safety valve
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