The Control of Soil Compaction Degree by Means of Lfwd

Sulewska, Maria Jolanta

doi:10.3846/bjrbe.2012.05

Cited by 20 publications

(16 citation statements)

References 4 publications

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“…The value of humidity during the experiment increased in all analysed rooms by 9.9% in Hall 1, by 6.4% -in Room 2, by 24.5% in Room 3. The error account was carried out in accordance with the recommendations contained in publications [27,28].…”

Section: Resultsmentioning

confidence: 99%

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Correlation of humidity and temperature in conference rooms - preliminary tests

Gładyszewska-Fiedoruk

2018

E3S Web Conf.

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In three different conference rooms, temperature and humidity were measured, and then the correlation of these measured parameters was determined. The analysed rooms are located in buildings of the same construction and in the same town, in the temperate climate zone. The rooms had a different number of people. The experiment caused more questions than answers. The only concrete conclusions that can be formulated are that in two rooms the humidity was far too low. The HVAC system slightly disturbs the correlation of temperature and humidity. The density of people in the room affects the increase of humidity. Despite the use of air temperature controllers in all the analysed conference rooms, the temperature during the tests increased, mostly in the room with the largest number of people. The influence of the number of people on the correlation between the measured parameters has not been determined. It is also not specified if external conditions influence this correlation. Humidity measurements should be continued in rooms where there are a lot of people in various aspects. Above all, there must be constructed the mechanisms to control it.

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Section: Resultsmentioning

confidence: 99%

“…As before, equations approximating the results of temperature measurements and R 2 coefficient were given, and error bars in all measurement series were marked. The error account was carried out in accordance with the recommendations contained in publications [27,28].…”

Section: Resultsmentioning

confidence: 99%

Correlation of humidity and temperature in conference rooms - preliminary tests

Gładyszewska-Fiedoruk

2018

E3S Web Conf.

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“…Light Weight Deflectometer is used as a control measure to determine the deflection modulus on the sand and gravel layers. Sulewska (2012) OF ROAD AND BRIDGE ENGINEERING 2 0 1 8/ 1 3 (4) examined the soil compaction degree of embankments using LWD, as well. The tests were performed on unbound layers in the road pavement structure of North-Eastern Poland.…”

Section: Static and Dynamic Methodsmentioning

confidence: 99%

Interaction of Physical Parameters and The Strength of Frost Blanket Course in Road Pavement Structure

Bertulienė

Juknevičiūtė-Žilinskienė

Sivilevičius

et al. 2018

BJRBE

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This paper determines the interaction between the physical indicators of frost blanket course and its deflection modulus, measured by static and dynamic devices. The Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. A Pilot Road consisting of 27 road sections, divided into 5 different road structures. A Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. In this research was determined the strength of frost blanket course in road pavement structures of Pilot Road by four devices: Falling Weight Deflectometer Dynatest 8000, Light Weight Deflectometers Prima 100 and ZORN ZSG 02 and Static Beam Strassentest. The results showed no reliable correlation between the deflection modulus, measured by different devices, and the physical indicators of the frost blanket course of the road pavement structures in Pilot Road.

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“…When OGAs are used to construct base layers, the layers will contain large voids between particles, unlike dense-graded aggregates that are used to construct conventional base layers (Figure 1). During the construction of the road pavement, the compaction of the base layer is an essential process that affects the stability and durability of the pavement, which are key engineering performance [7,8]. To properly achieve these performances, compaction quality control (QC) of the base layer should be conducted adequately during construction.…”

Section: Introductionmentioning

confidence: 99%

“…This method, which is called modulus-based QC, is gaining popularity with the adoption of the mechanistic-empirical pavement design (MEPDG) method, and its advantage is that the measured modulus is directly related to the structural performance of the pavement and its design parameters [14]. Correspondingly, many studies have been conducted, and related specifications have been established [8,[15][16][17][18][19][20]. In particular, Nazarian et al [21] conducted extensive laboratory, small-scale, and field tests with various unbound road base materials and proposed modulus-based compaction specifications for estimating target modulus and for field quality control; Walubita et al [22] established a comprehensive data storage system for better calibration of the mechanical-empirical design and rehabilitation of flexible pavements.…”

Section: Introductionmentioning

confidence: 99%

Compaction Quality Monitoring of Open-Graded Aggregates by Light Weight Deflectometer and Soil Stiffness Gauge

et al. 2020

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Open-graded aggregates (OGAs) are free-draining materials often used as the base layer of permeable pavements to allow the infiltration or drainage of stormwater. Despite their widespread use, the compaction quality of OGA base layers has not been specified properly. The currently used density-based compaction quality control (QC) has limitations; obtaining the field density and maximum dry density of OGAs by typical methods is challenging, due to their unique properties. To overcome these limitations, modulus-based compaction QC can be used as an alternative. In this study, five different OGAs were chosen and compacted into a specially built soil chamber to measure their densities. The light weight deflectometer (LWD) and the soil stiffness gauge (SSG) were used to evaluate the modulus of the compacted OGAs. The vibratory hammer compaction test was conducted to obtain the maximum dry density of the aggregates. Through these tests, the relationship between the modulus of the compacted aggregates and the relative density was obtained, and efforts to find a modulus range that ensures proper compaction were made. It was found that the LWD and SSG are valid and reliable devices for monitoring the modulus change of OGAs due to compaction.

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The Control of Soil Compaction Degree by Means of Lfwd

Cited by 20 publications

References 4 publications

Correlation of humidity and temperature in conference rooms - preliminary tests

Correlation of humidity and temperature in conference rooms - preliminary tests

Interaction of Physical Parameters and The Strength of Frost Blanket Course in Road Pavement Structure

Compaction Quality Monitoring of Open-Graded Aggregates by Light Weight Deflectometer and Soil Stiffness Gauge

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