Grout Pumping and Injection Operations TR 003 2.6. Bleed – Water Loss or Stability Test The bleed test, again a very simple test performed at the grouting site, measures the loss of water from the mixed grout due to settlement or separation of the heavier cement particles i.e. the bleeding of water from the grout. High quality grout is designed to have a bleed of less than 2% after 2 hours. The bleed test is performed with the use of a 1000ml graduated cylinder. This is usually plastic for safe and durable use in the work environment. The cylinder is graduated in 10ml increments. So each 10ml represents 1% of the 1000ml volume in the cylinder. The test is performed as follows: Marsh Funnel Flow Test Calibration check–first test with water to check calibration. Place finger over outlet, fill with clean water to the ridge mark on the funnel. Release finger and start stopwatch. Stop the timer when the water in the measuring jug is at the 1000ml mark The time should = 28 0.5 seconds Test procedure: 1. Ensure funnel is clean and dry. Hold upright with finger over the outlet 2. Pour fresh mixed grout through the screen until grout is level with the screen 3. Remove finger and start timer immediately 4. Stop timer when the grout reaches the 1000ml mark on the measuring jug. 5. Record the time taken to fill to this mark Date/Shift: _______/_______ Grout mix/type _________________________ Marsh Flow time ____________ seconds
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