3 edition of Compaction measurements by nuclear devices found in the catalog.
Compaction measurements by nuclear devices
Frank L. Holman
|Statement||compiled by F. L. Holman. In cooperation with E. N. Eiland [and] W. F. McCullough.|
|Series||Alabama highway research, HPR report, no. 34, Alabama highway research ;, HPR rept. no. 34.|
|Contributions||Eiland, E. N., McCullough, W. F., Alabama. State Highway Dept. Bureau of Materials and Tests., United States. Bureau of Public Roads.|
|LC Classifications||TE7 .A5 no. 34|
|The Physical Object|
|Pagination||iii, 56 p.|
|Number of Pages||56|
|LC Control Number||79630979|
The soil compaction (penetration resistance) measurements obtained by the three operators for the rod hammer and hydraulic penetrometers are presented in Table 1. There were highly significant differences in the soil compaction data between the three sites, between the dry and wet soils and the site x soil moisture interaction for each. Dynamic compaction refers to dropping large weights from a given height onto the ground surface. This process creates a crater and compacts that material under the crater. Laboratory tests are used to establish the characteristics of the soil to be compacted, to establish the target values to be achieved in the field, and to write the.
Cat Compaction Control helps compaction operators to understand job site factors that lead to quality, uniform compaction. Rather than relying on intuition and guesswork, operators use real time data from Cat Compaction Control to analyze and deduce when the compaction conforms to specification, ensuring complete coverage and efficient. Compaction Control of Granular Base Course Materials by Use of Nuclear Devices And a Control Strip Technique M. C. ANDAY and C. S. HUGHES, Virginia HighwayResearchCouncil, Charlottesville In an attempt to overcome some of the problems encountered in the compaction control of granular base materials through conventional.
An embankment of a road section of m length was built using 70% CS and 30% FA mix in India in The mix had an MDD of kg/m 3 and OMC of 11%, obtained using the modified Proctor test. After almost 2 years of service, the field condition of the road, for roughness and surface irregularity tests, was reported to be satisfactory. Compaction may refer to. Soil compaction, for mechanically induced compaction near the ground surface; Compaction of ceramic powders; Compaction (geology), part of the process of lithification involving mechanical dewatering of a sediment by progressive loading under several km of geomaterial Waste compaction, related to garbage; Cold compaction, powder compaction at low temperatures.
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Compaction is achieved by applying a pre s s u re on the surface or by vibrating the soil mass. Di f f e re n t for determining the in-place density of soils by nuclear methods (ASTM D ). The rubber balloon method re q u i r es a level test loca-tion. A hole is dug, and all of the soil dug from the hole.
Evaluation of Soil Compaction Measuring Devices FINAL REPORT Prepared by - Soil moisture measurements of the Nuclear Density Gauge (NDG) were higher than the ones obtained from oven dried Due to the effect of the side boundaries of the cuts, the NDG is not suitable for compaction measurements in small bellholes and keyholes.
v Although File Size: 3MB. Introduction The nuclear density gauge (NDG) is the device used by most state DOTs for measuring the field density of compacted layers of unbound materials. Portable measurement devices Field density testing devices include nuclear and electric gauges, which are non-destructive, because they don’t leave a core hole.
They provide results quickly. Non-destructive testing devices can be used for both quick shots to check consistency as well as absolute measurements when calibrated.
TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis Non-Nuclear Methods for Compaction Control of Unbound Materials documents information on national and international experience with non-nuclear devices and methods for measuring compaction of unbound materials.
The information collected by this synthesis includes: â ¢ Types of compaction control testing devices used by state DOTs, including construction specifications; â ¢ Non-nuclear devices that have been evaluated by state DOTs and those under consider- ation, including proposed specifications; â ¢ Various types of non-nuclear devices.
Compaction measurements by nuclear devices book compaction measurements devices Introduction and Background Most of the research studies reviewed showed that an alternative to nuclear devices for fieldAuthor: Gabriel Parada. MEASURING SOIL COMPACTION ON CONSTRUCTION SITES: A REVIEW OF SURFACE NUCLEAR GAUGES AND PENETROMETERS by Thomas B.
Randrup1 and John M. Lichter2 Abstract. This paper reviews two techniques of deter-mining soil compaction on construction sites. The sur-face nuclear gauge is found suitable for measuring soil compaction in soils with less than 5%. nuclear density gauge device and a number of alternative modulus-based devices, including the lightweight deflectometer, the dynamic cone penetrometer, and the soil stiffness gauge.
This study evaluated currently available, non-nuclear devices as potential replacements for the nuclear gauge for soil compaction control.
Devices based on impact methods, electrical methods, and stiffness methods were identified and evaluated through two field studies and two laboratory studies. Based on these studies, none of the. The Nuclear Moisture Density device (or Nuclear Gauge) is specifically designed to measure the moisture and density of soils, aggregates, cement, and lime treated materials, and to.
Compaction reduces the volume of air in ore, the characteristic of concern is the volume of air within the compacted pavement. This volume is typically quantified as a percentage of air voids by volume and expressed as “percent air voids”. Percent air voids is calculated by comparing a test specimen’s bulk density with its theoretical maximum density (TMD) and assuming the.
gauge cannot be used, the methods described in "Test Method for Earthwork Compaction Control by Sand Cone or Volumeter Apparatus," or any other method approved by the Department shall apply.
Warm-up and check the equipment. Daily Most nuclear gauges require a warm-up. This paper examines the relationship of two CCC measured values, compactometer value (CMV) and machine drive power (MDP), with measurements taken from four different in situ test devices, including the nuclear density gauge (NDG), lightweight deflectometer (LWD), soil stiffness gauge (GeoGauge), and dynamic cone penetrometer (DCP).
led to a closer investigation of the merits of using a nuclear bulk density meter for assessing compaction problems in the field. Equipment Several commercial devices are available on the market but the Troxler nucleardensity and moisturegauge (model B, see Figure I) was evaluated because it File Size: KB.
Nuclear Device Determining Test Maximum Density (FTMD) Calculating Relative Compaction Readings taken with a nuclear device can be influenced by other objects, and especially other nuclear sources in the immediate area.
The device must be at least m from any object and at least m from any other nuclear source unless appropriately Size: 1MB. A nuclear gauge (also called a nuclear density gauge, a soil moisture gauge, or a moisture density gauge) is a tool used for civil engineering projects and construction that measures soil density or soil water content.
Devices can be built to measure either soil density or soil moisture content, or both. The Radiation Safety Division. Field Calibration and Spatial Analysis of Compaction Monitoring Technology Measurements By Mark J.
Thompson compaction monitoring technology and in-situ devices (e.g., nuclear moisture-density gauge, CMV has been correlated to in-situ field compaction measurements for several soils.
To ensure that compacted backfill performs as expected, compaction control is performed in the field by measuring the dry unit weight and moisture content of the compacted fill. The nuclear gauge is the most common device used to make these measurements because it is very rapid and thus does not delay the construction schedule.
There are four types of compaction effort on soil or asphalt: Vibration Impact Kneading Pressure Soil Compaction Soil compaction is defined as the method of mechanically increasing the density of soil.
In construction, this is a significant part of the building process. File Size: 2MB. (). Nuclear density gauge compaction testing alternatives: synthesis and critical analysis. Journal of Structural Integrity and Maintenance: Vol. 4, No. 2, pp. Author: K. W. McLain, D. D. Gransberg."TRB's National Cooperative Highway Research Program (NCHRP) Synthesis Non-Nuclear Methods for Compaction Control of Unbound Materials documents information on national and international experience with non-nuclear devices and methods for measuring compaction of unbound materials."--Pub.
desc.Compaction processes and technology. Compaction technologies can generally be categorized by the degree of pressure applied to the wastes.
Compaction performance is generally measured by the ‘volume reduction factor’, VRF, which is defined as the ratio of the volume prior to compaction compared to the volume of the waste after by: 1.