An innovative, non-nuclear method of determining SuperPave, Stone Matrix (SMA), and coarse mix asphalt air voids.
CoreLok performs 5 standard lab tests:
- Bulk Specific Gravity
- Maximum Specific Gravity
- Aggregate Specific Gravity
- Porosity
- % Asphalt Content
The CoreLok® is a system for sealing asphalt samples so that the sample densities may be measured by water displacement methods. Samples are automatically sealed in specially designed puncture resistant polymer bags. Densities measured with the Corelok® system are highly reproducible and accurate. The results are not dependent on material type or sample shape. The GravitySuite™ PC software package calculates and manages your data for ease of operation.
One Machine for All your Gravity Measurements of Asphalt and Aggregate.
ASTM D6752, ASTM D6857, ASTM D7063. A fundamental density measurement. It does not require empirical calibrations. An accurate method for Bulk Specific Gravity measurement.
Bulk Specific Gravity of Compacted samples
Bulk Gravity Specification ASTM D6752 and AASHTO T-331
Specific gravity (density) is the single most specified parameter in the construction industry. For open graded mixes (i.e. SMA and OGFC) and absorptive mixtures of asphalt, the Saturated Surface Dry (SSD) method is inaccurate. Water infiltration in and out of the sample produces a lower than actual measurement for sample volume, higher calculated density and a lower estimate of air voids. The CoreLok® system automatically seals these samples in specially designed polymer bag and allows for measurement of accurate water displacement test. The present sealing methods, Wax and films, are labor intensive and the results are extremely operator dependent.
Maximum Specific Gravity (Gmm)
Max Specific Gravity Specification ASTM D6857
This method may be used as an alternative to the conventional “Rice Test” for the determination of maximum specific gravity of loose asphalt mixtures. The CoreLok® test can be completed in seven minutes with minimal exposure to water, eliminating the need for a lengthy “Dry Back” method.
This procedure requires that a sample of dry asphalt mixture is placed inside the vacuum bags and sealed within the CoreLok® vacuum chamber. The bags are then cut open under water and a submerged weight is determined. The weight in air and the submerged weight can be used to calculate the maximum specific gravity of the asphalt mixture.
Apparent Specific Gravity, Absorption and Bulk Specific Gravity of Aggregates
AggPlus™ Specification ASTM D7370M
Oven dry aggregates are used in this test to determine the specific gravity and absorption of fine or coarse aggregates in less than 20 minutes. This test is highly accurate and repeatable.
In this test, a density measurement is obtained by fully saturating the sample with CoreLok® and another density is measured under an unsaturated condition. These two densities can be used with already known equations to calculate apparent specific gravity, absorption and bulk specific gravity. The AggSpec™ PC software allows for simple entry and calculation of these parameters.
Porosity of Compacted Asphalt Samples
Porosity is the measure of the percentage of water permeable voids in a compacted sample. Porosity gives an accurate estimate of sample permeability. You can now determine the interconnectivity of voids within your sample and determine your mix performance during design or after lay down. Two different mixes with 7% air voids can have different permeability performance on the field, depending on the interconnectivity of voids. However, these same mixes will never have the same porosity. For open graded mixes Porosity is a more meaningful measure of performance than % air voids. GravitySuite™ software included with CoreLok® provides automatic calculation of porosity based on a sealed and unsealed density of your sample.
Percent Asphalt Calculation
Use the CoreLok® to get an accurate measure of percent asphalt. The measurements using the CoreLok®, involves the determination of gravity of combined aggregate, only available with the CoreLok® unit, and maximum gravity of your mixture. These two critical measurements of your mixture can be used with the standard Superpave™ equations to accurately calculate the %AC in your mixture.
This method is unique and very accurate for determination of %AC for difficult aggregates with significant variability and breakdown in the NCAT ignition furnace. The CoreLok® method is simple and can be completed in less than 20 minutes.
ACCESSORY (VERIFICATION VAC GAUGE)
Description
The Vac Gauge is a high-precision digital vacuum gauge designed to provide you with absolutely reliable readings. It has all the measuring functions you need for evacuating refrigerant systems and heat pumps and is built to last and tough enough to take the odd knock.
Via a Bluetooth interface, connects with the a Smart App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail.
Areas of Application
Evacuating is one of the most important steps when it comes to installing or restarting refrigerant or air conditioning systems: foreign gases, moisture and oils have to be removed properly. That’s when the absolute pressure of a system needs to be measured.
And that’s exactly what the digital vacuum gauge is designed to do: the meter provides you with highly accurate information regarding the dehumidification status of the system and is able to measure even the smallest of absolute pressures absolutely reliably. This means that you are always able to observe manufacturer specifications. A visual alarm warns immediately when a threshold has been exceeded.
And because the digital vacuum gauge is IP42 rated (water resistant and dirt proof), it is virtually impervious to moisture and dirt.
Delivery Scope
Digital vacuum gauge with Bluetooth®, two AA batteries.
Applications
Complying with Manufacturer’s specifications
Some manufacturers specify exactly what the absolute pressure must be for you to evacuate your air conditioning systems how long this pressure must be maintained. Compliance with these specifications is simple and easy thanks to the flexible setting of the alarm threshold.
Documenting measurements
Via a Bluetooth interface, connects with a Smart App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail.
When you use the Vac Gauge in combination with the 570 digital manifold, you can save the Vac Gauge measuring values or display them directly on a laptop via the optional EasyKool software.
Ensuring dehumidification
The Vac Gauge not only measures the pressure, but also gives the water evaporation temperature associated with it. In addition, it measures the ambient temperature and displays the temperature difference. This means you can quickly check whether the humidity in the system is evaporating and dehumidification is progressing properly.
Evacuating refrigeration systems
Using the Vac Gauge, you can carry out evacuations of refrigeration systems quickly, flexibly and with a high level of accuracy.
