This standard is issued under the fixed designation C; the number Conversion and rounding given in Standard IEEE/ASTM SI. The intention of this article is to clarify the specifications listed in ASTM C, Standard Specification for Mixing Rooms, Moist Cabinets, Moist. ASTM C Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage. Tanks Used in the Testing of Hydraulic Cements and Concretes.

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Water storage tanks shall be constructed of non-corroding materials with provisions for automatic control of water temperature. Take extra care to ensure that the flow between the tanks is even.

This article can be utilized as a general guideline for curing materials that include Portland cement concrete, masonry mortar, masonry cement, concrete beams, grout, and hydraulic cement see Table 1. To help reduce exposed surface area, try covering the tanks with large pieces of Styrofoam insulation.

More labs currently use chart recorders. There is also the option of using a smaller moist cabinet for specialized projects rather satm building an entire room.

If you decide to go this route, you will need to have at least one calibrated chart recorder or digital recorder per tank see Figure 1.

ASTM C, Test equipment Controls

Curing tanks might be a more cost-effective solution, but temperature control can be difficult, and they take up a lot of floor space. Without proper maintenance and upkeep, the misters will begin to drip water on the specimens before clogging entirely. The air and mixing water temperatures and the relative humidity in the cement mixing room shall be maintained at specific values.


Both curing tanks and moist rooms have their benefits and drawbacks. According to an informal poll atm CCRL inspectors, the number of laboratories with curing tanks versus curing rooms is about evenly split.

Learn how to be an AASHTO lab 24/7

ASTM does not give any warranty express or implied or make any c11 that the contents of this abstract are accurate, complete or up to date. Maintaining two sets of working spray nozzles qstm be less time consuming than continuously repairing dripping nozzles, or suffering the consequences of improperly cured materials.

ICS Number Code If you have to install a moist room against an exterior wall, try to give at least 6 inches of dead air space.

High temperatures can lead to falsely high strength. Can Portland cement grout cubes be cured in a water tank instead of curing cabinet? Tariq – Your QA will be contacting you about this question shortly. Ashm easiest way to determine this is to add calcium hydroxide to the water and then stir the water. Special thanks to Jan Prowell and the other employees of CCRL who shared their experiences evaluating curing facilities and records.

The Cure for The Cure: A Guide to ASTM C and Your Curing Facilities

No other units of measurement are included in this standard. It is important to choose temperature charts that are easily read and do not have a scale so small that the pen or marker line width exceeds the scale lines.

Link to Active This link will always route to the current Active version of x511 standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. The best way to make sure that you have a well-circulated, temperature-controlled facility that meets all of the requirements is to take the time and money to get it right the first time.


While it is nice to be able to have all of the temperature records on a computer, CCRL inspectors report that laboratories using these data loggers often forget to download and evaluate the data. Tanks are available from typical laboratory suppliers, but also from farm supplies, as they can also be used as food and water troughs for animals.

Also consider all the man hours lost to constant maintenance and quick-fixes, not to mention having to spend time writing corrective action reports for your AASHTO re: Unless you are a new lab, thinking of rebuilding, or moving to a new building, you probably already have a curing facility set up.

Depending on the type of material you are working with, you should refer to the applicable specification or standard to determine whether you need to maintain tanks or a curing room, or even a tank within a curing room. Pre-fabricated curing rooms are not on the market, so most labs make their own out of readily available materials.

They both seem to be equally popular. Some of the drawbacks include the pen drying out and having to be replaced often, and the temperature not reading correctly. Take the time to install insulation, piping, replaceable misters, heating and cooling units, circulators, and temperature recording devices as applicable.