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PROJECT NO: 4140 92-2757 DATE: July 23, 1993 P�GE: 6 TEST 1�tETHODS (cont l: Sampie Removal One 2' by 8' piece of each ASTM C578 type was removed from the foundation each fall. The average soil moisture content at the time of removal varied from 6.8 - 12.4 % by weight (this corresponds to 0.91 - 1.67 gallons of water per cubic foot of soil). Test specimens were removed from each sample, tested, conditioned at 73.4 ±3,6°F and 50 ±5 % RH to moisture equilibrium, and tested again. The conditioning atmosphere was considered to be "standard laboratory atmosphere" and moisture equilibrium was considereci to be the point where the weight of the sample did not change by more than 0.1% over a 24 hour period. Moisture Content - The moisture content was determined by drying the thermal resistance test specimens and recording the weight loss. The specimens were dried for 24 hours at 122'F in a circulating air oven (uncontrolled humidity). The dried specimens are considered to be without moisture and therefore the difference in weights is attributable to the amount of moisture that was present in the samples. The moisture content was determined at the time of removal from the foundation and after reconditioning at 73.4 ± 3.6°F and 50 ± 5 % RH to moisture equilibrium. The moisture content was calculated as the volume of water presen[ in a given volume of sample, on a percentage basis. � Densit,�Test - The density test was conducted in accordance with ASTM:D1622-88, "Standard Test Method for Apparent Density of Rigid Cellular Plastics." Three, 12" by 12" specimens were conditioned at 73.4 ± 3.6°F and 50 ± 5 % RH to moisture equilibrium. The length, width, and thickness of each specimen was determined as the average of three measurements. Each specimen was weighed on a model 1364MP Sartorius digital balance, S/N 3202200. The density was calculated for each specimen as the weight divided by t�he volume. Thermal Resistance - The thermal resistance test was conducted according to ASTM: C518-91, "Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus." Three 12" x 12" specimens were removed from each sample, tested, conditioned to steady-state at 73.4 ± 3.6°F and 50 ± 5 % RH to moisture equilibrium, and tested again. Each specimen was placed in a thermal conductivity instrument, model Rapid-K, manufactured by Holometrix, Inc. Steady-state heat flux measurements were made at a mean temperature of 75°F using a hot face temperature of 100°F and a cold face temperature of 50°F. Thermal conductivity and thermal resistance µ'rere determined by comparing the heat flux measurements of each specimen to measurements made on a standard reference material of known thermal resistance and thermal conductivity, DATA: See Appendix A of this report for the test data for each year. �$A�IUTUAL PROTECTION 70 CUEYTS.THE PUBUC ANO OURSELVES.AlL TW�N�,17V T�SiIVG CORPOR.�TION RE?ORiS aRE SUBtiuTrED aS iHE CONF:DEN?ia,L PROPEa7�r G��L=':"S �ND AU7HORIZAiION FOq RUBL'CAiION OF STATEMEN75_CONCWSIONS OR E%iRACTiONS PROM OA r7EGAR0iNG OUFi REPOATS iS aESE�vED aEVDiNG OUR PRiOR ovai7T�u aacaCva�