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> Concrete shrinkage humidity chamber w/ molds and studs
Concrete shrinkage humidity chamber w/ molds and studs
The cabinet has a 1/2" layer of insulating foam throughout to help with temperature regulation, and comes with a handy four tier wire rack that takes up approximately half the interior to make item storage more organized. This rack can easily be removed if necessary. Also included are a combination thermometer hygrometer for use in tracking the temperature and relative humidity inside the cabinet.
The front panel of the unit has three controls. One for humidity, one for temperature, and one for a fan. The fan control provides variable speed control to a fan mounted in the upper left fore corner of the cabinet, and it works very well. The humidity control, resembling a thermostat, is wired into the Herrmidifier on the right side of the cabinet, and likewise is in good working condition. The temperature control is a bit of a puzzler. Not only is the dial itself missing its knob (though the dial can still be turned using finger pressure), but there does not appear to be any means of it affecting the temperature inside the cabinet, as there are no heating elements or refrigeration coils. There also does not appear to be any screw holes inside the case where such a mechanism would have once been. All three systems are turned on and off seperately via a toggle switch, and these are wired into green indicator lights at the bottom of the panel. While the lights for humidity is working, the fan and heat light have blown.
We fired up the humidifier for a while before posting this, and it is working well. There is an inlet for a water line on the reservoir for the humidifier, with a float to automate the introduction of water into the system, and while everything appears to be in working order, we are not equipped to hook up the humidifier in this way. However, when we manually added water to the reservoir, within just a few minutes the cabinet let forth a satisfying cloud of mist when the door was opened. We will, of course, include a copy of the Herrmidifier's instruction manual.
The nine included molds are similar to item # H-3256 from Humboldt Manufacturing, but the actual manufacturer of these molds is not known. The molds are solid steel, and are assembled from five parts; two end plates, two sides, and a bottom. These pieces are held together tightly at their flanges by hex head bolts with wing nuts. Each of the end plates has a screw hole for the insertion of contact points (gauge studs) to allow for the testing of the resulting concrete prism in a length comparator in accordance with ASTM C151, C157, C227, and C490. All of the molds are in good condition, with no dents or bends, and all bolts and wing nuts are accounted for.
