05.
General Information The HM-2415 Soil Volume Change Meter is used to evaluate potentially dangerous swelling or shrinking conditions existing in some clay soils used in residential and commercial developments. Severe damage to building foundations, walls, and floors can result when alteration of moisture in these soils causes volume change. This device yields PVC values which refer to the maximum possible volume change that a soil could undergo when subjected to changing moisture conditions.
Compaction of Sample A. Disassemble the Soil Volume Change Meter. B. C. 1. Remove crosshead (#11 Figure 1) and proving ring (#2) by loosening hex nuts (#21) at top of each rod. The rods may remain screwed into the base (#1 0) but place the crosshead and proving ring where it will not be jarred during compaction. 2. Unscrew and put aside the lucite container (#18) . Leave O·ring (#22} in place. 3.
6. Compact the last layer with a blows. After compaction, the last layer should extend approximately 1/4" (6.35 mm) into the spacer ring (#16). If it is significantly below this point, remove entire sample and recompact. D. Put assembly on table and remove the 3 bolts {#23). Rotate spacer ring (#16}, to break bond between ring and soil, and remove carefully from sample. Rotate compaction ring (#15), to break bond between base and soil, and remove ring with sample from assembly. E.
F. Replace lucite container (#18) onto base, screwing it tightly to ensure water seal. G. Place loading disc (#17) on porous stone (#14) with the center indentation at the top. H. Place crosshead (#11) with proving ring (#2) on the supporting rods (#12). (Be sure that the adjustable rod which extends down from the proving ring dial does not strike the cover.) Add washers and nuts, then tighten firmly. I. Set proving ring (#2) dial to zero by moving the band around the dial face.
B. To obtain a more exact PVC category and plasticity index, refer to the tables prepared for your specifically calibrated unit. These tables (in pounds, kilograms, and newtons) are separately supplied with this manual. 1. To calculate the equivalent swell index value in pounds per square foot, take the reading from the proving ring dial and subtract the one division that registered on the dial prior to swell. 2. Use this number on the proving ring calibration table to find the load in pounds. 3.
Parts List Item Description Requred 1 Frame Pot. Vol. Change Meter 1 2 1 000 lb. Single Proving Ring 1 3 Standard Compaction Hammer (Not Shown) 1 4 Corundum Porous Stone 2 5 Proving Ring Adapter 1 6 ~-20 x 1 3/4 Soc.Hd.
Figure 5 - Conversion Table TABLE FOR CONVERTING PROVING RING READINGS TO PVC CATEGORY AND APPROXIMATE PLASTICITY INDEX Proving Ring Swell Index Reading (#/SF) PVC Category Plasticity Index (%) 5 6 7 8 9 10 10.8 11 12 13 14 15 16 17 18 19 20 20.3 21 22 23 24 25 26 27 28 29 30 30.2 31 32 33 34 35 36 37 38 39 775 925 1075 1250 1375 1550 1675 1700 1875 2025 2175 2350 2500 2675 2800 2975 3150 3200 3300 3450 3600 3775 3925 4075 4225 4375 4525 4700 4725 4850 4975 5125 5275 5425 5575 5725 5850 6000 0.8 1.
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.