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Introduction Hydraulic reaction-type apparatus for determining the setting time of concrete with slump greater than zero by testing mortar sieved from the concrete mixture. It also determines the effects of variables such as temperature, cement, mixture proportions, additions and admixtures upon the time of setting and hardening of concrete. The penetrometer’s design makes it easy to operate, being more efficient, with a longer gear rack. All needles are one length so settings may remain the same.
Number of Specimens Prepare at least three separate batches for each test condition. One rate of hardening test shall be made on each batch. An equal number of batches for each condition shall be made on any given day. When it is impossible to make at least one test for each variable on a given day, the mixing of the entire series of batches shall be completed in a few days as possible and one of the mixtures shall be repeated each day as a standard of comparison.
Report The report shall include the following: Data on Concrete Mixture • Type and proportions of cement, fine aggregate, coarse aggregate (including maximum size and grading of aggregates) and the ratio of net water content to cement content. • Name, nature and percentage of active ingredients by weight of cement, of any addition or admixture used. • Air content of fresh concrete and method of determination. • Consistency of concrete as determined by the slump or other test for consistency.
Calibration • • • • • • Obtain a force-measuring gauge appropriate for measuring compressive force from 20 to 200 lbf and acceptable as reference standard. If the measurement standard will not fit under the Penetrometer’s needle adapter, remove the breather plug, H-4133.8.4 from the cylinder, and the needle adapter, H-4133.8.9, from the piston stem. Remove the gauge & cylinder assembly, H-4133.7A, by taking off the lock nut, H-4133.8.5.
Warranty Humboldt Mfg. Co. warrants its products to be free from defects in material or workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co., factory replacement of any part or parts of such product, for the warranty of this product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions of Sale. The purchaser is responsible for the transportation charges. Humboldt Mfg. Co.
