What does a dilatometer measure?
The principle of dilatometry methods is to measure the materials volume variation as a function of the change in temperature. The equipment used for such measurements is usually a mercury-based dilatometer . A sharp change in slope in the curve indicates the glass transition temperature.
Why dilatometer is used?
A dilatometer is a precision instrument for the measurement of dimensional changes in material as a function of temperature. Dilatometry can be used to test a wide range of material including traditional and advanced ceramics, glasses, metals, and polymers.
Which instrument is used to measure transition temperature?
A dilatometer is a scientific instrument that measures volume changes caused by a physical or chemical process. A familiar application of a dilatometer is the mercury-in-glass thermometer, in which the change in volume of the liquid column is read from a graduated scale.
What is flat plate dilatometer test?
The Flat Dilatometer Test (DMT) is an in-situ testing method used to determine the strength and deformation characteristics of fine-grained soils. The blade has a cutting edge to penetrate the soil and is inserted into the ground at the desired depth. It is connected to a control unit on the ground surface.
What is silica dilatometer?
4.1 Vitreous silica dilatometer of either the tube or push rod. type to determine the change in length of a solid material as a function of temperature. The temperature is controlled at a constant heating or cooling rate.
What is Tg value?
Glass Transition Temperature (Tg) is the point at which a material alters state – going from a glass-like rigid solid to a more flexible, rubbery compound.
What is the use of Oedometer test?
Oedometer tests are performed by applying different loads to a soil sample and measuring the deformation response. The results from these tests are used to predict how a soil in the field will deform in response to a change in effective stress.
How do you perform a vane shear test?
The test starts by pushing the vane and the rod vertically into the soft soil. The vane is then rotated at a slow rate of 6° to 12° per minute. The torque is measured at regular time intervals and the test continues until a maximum torque is reached and the vane rotates rapidly for several revolutions.
How long does an Oedometer test take?
At each loading stage, readings of deformation are taken systematically to develop a time-settlement curve. That is, after the application of each load, the deformation is measured at 6, 15, 30 seconds, then at 1, 2, 4, 8, 16, 30 min and at 1, 2, 4, 8 and 24 hours, respectively.