Knowledge Core Collection:https://hdl.handle.net/11681/464292024-03-29T11:38:14Z2024-03-29T11:38:14ZEvaluation of soil mechanics laboratory equipment : report 13 : feasibility study, microwave oven used for rapid determination of soil water contentsGilbert, P. A.https://hdl.handle.net/11681/470362024-03-06T22:58:01Z1974-08-01T00:00:00ZTitle: Evaluation of soil mechanics laboratory equipment : report 13 : feasibility study, microwave oven used for rapid determination of soil water contents
Authors: Gilbert, P. A.
Abstract: The quantity of water present in soils is usually expressed as a percentage of the dry weight of the soil and is known as water content. Typically, water contents are determined by drying moist soils to a constant weight in a 110 ± 5 C° oven for 4 to 16+ hr, depending upon soil type. While this method is simple and accurate, it is slow and occasions often arise when more rapid drying methods are desired. Microwave energy offers a rapid alternative method. However, the amount of microwave energy absorbed is directly proportional to the exposure time, and thus certain precautions are required. This report describes a method of using microwave energy for rapidly determining water contents within 0.5 or less percentage points of those determined by using conventional ovens.
Description: Miscellaneous Paper1974-08-01T00:00:00ZStresses under moving vehicles : report 1 : a pilot study of WES earth pressure cell action in comparatively soft soilU.S. Army Engineer Waterways Experiment Stationhttps://hdl.handle.net/11681/470352024-03-26T15:20:59Z1957-07-01T00:00:00ZTitle: Stresses under moving vehicles : report 1 : a pilot study of WES earth pressure cell action in comparatively soft soil
Authors: U.S. Army Engineer Waterways Experiment Station
Abstract: A pilot study was conducted to determine whether static and dynamic stresses induced in fairly soft soils by a pneumatic tire could be measured satisfactorily with the WES earth pressure cell. The study showed that the measurements were of the same order of consistency and accuracy as measurements made with the WES cell under static loads in firmer soils. Experience in placement of pressure cells and other test techniques was gained which will be valuable in future tests of this general nature. Preliminary observations were made of the effect of tire pressure, speed of truck, and repetitive passes on stresses induced at various depths. A limited study was performed to compare measured stresses with stresses computed according to Boussinesq's equations.
Description: Miscellaneous Paper1957-07-01T00:00:00ZVehicle mobilityU.S. Army Engineer Waterways Experiment Stationhttps://hdl.handle.net/11681/470342024-03-26T15:20:09Z1957-10-01T00:00:00ZTitle: Vehicle mobility
Authors: U.S. Army Engineer Waterways Experiment Station
Abstract: In the spring of 1945, the Waterways Experiment Station was assigned the responsibility for the study of trafficability, and has been engaged in this work and its more important corollary, the study of means to improve
the mobility of military vehicles in soft soils, ever since. The nuclear bomb, which eliminated the urgent need for trafficability guidance in Japan in 1945, has not eliminated the need for guidance in the future. On the contrary, the need for increased knowledge of trafficability, and increased mobility of vehicles, is greater today than ever before, because nuclear warfare demands rapid assembly of battle forces, a quick strike, and immediate and wide dispersal before retaliation. Roads and highways can no longer be depended upon entirely for transportation. In the future our vehicles must travel cross-country if we are to be victorious.
Description: Miscellaneous Paper1957-10-01T00:00:00ZMobility classification of military vehicles.U.S. Army Engineer Waterways Experiment Stationhttps://hdl.handle.net/11681/470332024-03-26T15:16:40Z1958-05-01T00:00:00ZTitle: Mobility classification of military vehicles.
Authors: U.S. Army Engineer Waterways Experiment Station
Abstract: The purpose of the study reported herein was to define a system whereby vehicles, primarily self-propelled military vehicles, can be classified into groups on the basis of minimum soil strength necessary for their operation off roads on fine-grained soils. The system may also be extended to other vehicles, including towed vehicles.
Description: Miscellaneous Paper1958-05-01T00:00:00Z