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Road transport is by far the most convenient way of transportation these days, offering the highest mobility and flexibility. While road transport is gaining popularity, the increased amount of traffic requires proper improvements and maintenance of the road network. The increasing usage of roads requires highest levels of maintenance of the road n...
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... Benkelman Beam method gained its popularity as a static non-destructive method in the 2 nd half of the XX century, it was soon pushed away by a series of new dynamic methods evolved from FWD, an invention of Danish Road Laboratory (Fig. 1). The main advantage of this method is that instead of measuring the pavement reaction to a static force it generates dynamic impulse load The modern modifications of FWD are automatic, computer driven systems operated with a simple interface. There are also special variations, such as Light Weight Deflectometer (optimized for loose ...
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The modern era of communication needs a system with high bandwidth and high speed datarates.To fulfill rapid demands in today’s technology era, Free space optical (FSO) communication system has become very attractive technology, because they provides high bandwidth, license free spectrum using infrared beam, and are a reliable means of communicatio...
Citations
... The peak load range is 15-50 kN at 22 ms rise time (=time from start to peak). The measurement procedures and used technologies are designed based on many years of best practices, which are described in multiple studies [46][47][48]. It is very positive that despite the relatively high-quality equipment, developments in non-destructive data collection technologies are moving forward. ...
... The data were evaluated for every 20 m. In Table 2 examples are presented of measurements in the station every 100 m. 239 403 100 174 655 200 294 508 200 290 713 300 252 569 300 327 591 400 274 729 400 305 611 500 240 744 500 234 512 600 295 838 600 284 525 700 248 647 700 291 521 800 321 540 800 251 477 The measurement procedures and used technologies are designed based on many years of best practices, which are described in multiple studies [46][47][48]. It is very positive that despite the relatively high-quality equipment, developments in non-destructive data collection technologies are moving forward. ...
Ensuring the sustainability of road infrastructure cannot be achieved without the continuous application of new knowledge and approaches within individual management steps. A particularly risky stage in the life cycle of existing roads is the operation phase. High attention is paid to the environmental, financial and social impacts and benefits of individual processes applied by road managers. These processes meet in pavement management systems (PMS), which, however, cannot work reliably without the necessary input data. Information on the development of the technical condition of the road can also be included among the most important data. The paper brings the first outputs from several years of research of measurements on the Slovak 1st class road. Its aim is to gradually determine the degradation functions for the needs of Slovak geographical, climatic and transport conditions. The secondary objective is to verify the reliability of non-destructive measurement procedures of the technical condition of the road. Emphasis is placed on the application of such mathematical procedures that can not only reliably bring about the determination of past developments in the roadway, but can also present the expected picture of future developments.
... Cilj tog istraživanja bio je utvrditi korelaciju između deformacijskog modula, mjerenog deflektometrom ZFG 01, i stupnja zbijenosti tla. Prema autorima[28,29], može se pretpostaviti da postoji određena međuzavisnost podataka dobivenih mjerenjem pomoću statičkih i dinamičkih uređaja. Slika 2. prikazuje teoretski model za usporedbu očitanja pomoću statičkih i dinamičkih uređaja s obzirom na tri moguća slučaja. ...
U ovom radu prikazan je odnos između statičkog i dinamičkog deformacijskog modula,
te je uspostavljena korelacija između fizičkih svojstava i pokazatelja nosivosti sloja
kolničke konstrukcije za zaštitu od smrzavanja. Prikazani su korekcijski koeficijenti
dinamičkih mjerenja u odnosu na statička očitanja. Rezultati pokazuju da u odsutnosti
statičkog mjernog uređaja mogu se statička očitanja zamijeniti očitanjima bilo kojih od
tri predstavljene vrste dinamičkih uređaja, te na taj način odrediti nosivost sloja kolničke
konstrukcije za zaštitu od smrzavanja.
... According to the authors of [28,29], it can be assumed that there is a certain interaction between the measurement data obtained by static and dynamic devices. A theoretical model for the comparison of static and dynamic device readings, with three possible cases, is presented in Figure 2. ...
The relationship between the static and dynamic deflection modulus is presented in the paper, and a correlation between the FBL physical and strength indicators is determined. The correction coefficients of dynamic measurements, as related to static beam readings, are presented. The results show that, in the absence of a static beam, static beam readings can be replaced by the readings of any of the three analysed dynamic devices, and the FBL strength can thus be measured. 2019 © Union of Croatian Civil Engineers and Technicians. All Rights Reserved.
