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Humboldt HM-2415 Product Manual

Soil volume change meter (pvc)
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07.24
HM-2415
Soil Volume Change Meter (PVC)

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Summary of Contents for Humboldt HM-2415

  • Page 1 07.24 HM-2415 Soil Volume Change Meter (PVC)
  • Page 2 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.
  • Page 3 Compaction of Sample Disassemble the Soil Volume Change Meter. 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.
  • Page 4 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.
  • Page 5 Replace lucite container (#18) onto base, screwing it tightly to ensure water seal. Place loading disc (#17) on porous stone (#14) with the center indentation at the top. 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.
  • Page 6 Greater than 6 Very Critical 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.
  • Page 8 Parts List Item Description Required Frame Pot. Vol. Change Meter 1 000 lb. Single Proving Ring Standard Compaction Hammer (Not Shown) Corundum Porous Stone Proving Ring Adapter ~-20 x 1 3/4 Soc.Hd.Cap Screw Cleaning Rod Base Crosshead Supporting rod Adjusting Screw Lock Nut Compaction Ring Spacer Ring...
  • Page 9 Figure 5 - Conversion Table TABLE FOR CONVERTING PROVING RING READINGS TO PVC CATEGORY AND APPROXIMATE PLASTICITY INDEX Proving Ring Swell Index Plasticity Reading (#/SF) Category Index (%) 1075 10.7 1250 11.7 1375 12.7 1550 13.8 10.8 1675 14.6 1700 14.8 1875 15.8...
  • Page 12 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.