HIGHWAYS DEPARTMENT GUIDANCE NOTES ON ROAD TESTING (original) (raw)

Laboratory Assessment of Highways

This paper reports laboratory tests conducted while evaluating some properties of bitumen used in the production of hot mixed-hot laid asphalt of three different asphalt plants in southwest of Nigeria. The bitumen properties investigated included determination of the purity or contamination of the bitumen sample. Determination of the temperature at which bitumen sample used will attain standard fluidity for the purpose of mixing with aggregate. The bitumen properties also investigated included determination of the sample grade at the temperature of 25°C and 60°C. These properties were investigated through Solubility, Softening Point, Penetration and Saybolt Viscosity tests respectively. Although all the three asphalt plants samples passed the Softening Point and the Solubility tests but could not satisfy the specification values set up as standards for Penetration and Saybolt Viscosity tests. Southwest of Nigeria is in the tropical region and the standard specification values for Penetration test should be AC 60/70 but the results obtained are of about AC 85/100 that is meant for temperate climate regions. It is pertinent to note that the harder the grade of bitumen, the lower the penetration value and the better its use for the production of quality asphalt in tropical region. The significance of this study is that results of experiments on bitumen samples from the three selected asphalt plants in southwest of Nigeria are unsatisfactory when related to the expected standard approved grades of both Penetration and Saybolt Viscosity tests. Unsatisfactory results from Penetration and Saybolt Viscosity tests as shown in this study could significantly affect the performance of asphalt leading to the premature failure of flexible pavements as presently prominent in southwest of Nigeria. __________________________________________________________________________________________

Pavement Test Track Research Findings

The NCAT Pavement Test Track, a world-renowned accelerated pavement-testing facility, has been operating for 10 years. It is a cooperative project with individual test sections sponsored by highway agencies and commercial interest groups. This special report highlights key findings since the first heavily loaded tractor-trailer made the inaugural 1.7-mile journey around the track a decade ago.

English Version Road and airfield surface characteristics - Test methods - Part 1

Part 1: Measurement of pavement surface macrotexture depth using a volumetric patch technique Oberflächeneigenschaften von Straßen und Flugplätzen -Prüfverfahren -Teil 1: Messung der Makrotexturtiefe der Fahrbahnoberfläche mit Hilfe eines volumetrischen Verfahrens Caractéristiques de surface des routes et aérodromes -Méthodes d'essai -Partie 1: Mesurage de la profondeur de macrotexture de la surface d'un revêtement à l'aide d'une technique volumétrique à la tache ICS 93.080.20; 93.120 Identical (IDT) with EN

Guidelines for Conducting and Calibrating Road Roughness Measurements

2000

Road roughness i s g a i n i n g i n c r e a s i n g importance a s a n i n d i c a t o r of road c o n d i t i o n , b o t h i n terms of road pavement performance, and a s a major d e t e rminant of road u s e r c o s t s . T h i s need t o measure roughness has brought a p l e t h o r a of i n s t r u m e n t s on t h e market, c o v e r i n g t h e range from r a t h e r s i m p l e d e v i c e s t o q u i t e complicated systems. The d i f f i c u l t y i s t h e c o r r e l a t i o n and t r a n s f e r a b i l i t y of measures from v a r i o u s i n s t r u m e n t s and t h e c a l i b r a t i o n t o a common s c a l e , a s i t u a t i o n t h a t i s e x a c e r b a t e d through a l a r g e number of f a c t o r s t h a t c a u s e v a r i a t i o n s between r e a d i n g s of s i m i l a r i n s t r u m e n t s , and even f o r t h e same i n s t r u m e n t . T h i s need t o c o r r e l a t e and c a l i b r a t e l e d t o t h e I n t e r n a t i o n a l Road Roughness Experiment (IRRE) i n B r a z i l i n 1982, which i s documented i n a companion volume i n t h i s S e r i e s , e n t i t l e d The I n t e r n a t i o n a l Road Roughness Experiment: E s t a b l i s h i n g C o r r e l a t i o n and a C a l i b r a t i o n Stand a r d f o r Measurements (World Bank T e c h n i c a l Paper Number 45). T h i s paper d e f i n e s roughness measurement systems h i e r a c h i c a l l y i n t o f o u r groups, r a n g i n g from p r o f i l o m e t r i c methods ( 2 g r o u p s )being a c c u r a t e and most amenable t o d e t a i l e d a n a l y s i sthrough response-type road roughness measuring systems (RTRRMS1s)r e p r e s e n t i n g t h e most widely u s e d , p r a c t i c a l and f a s t i n s t r u m e n t st o s u b j e c t i v e e v a l u a t i o na l l o w i n g assessments t o be made without use of i n s t r u m e n t s . The g e n e r a l p l a n n i n g of road roughness measurement programs i s o u t l i n e d , a s w e l l a s t h e c r i t e r i a f o r s e l e c t i o n of measurement system t o meet t h e o b j e c t i v e . The p r o c e d u r e s f o r c a r r y i n g o u t s u r v e y s i n t h e four groups of systems a r e e x p l a i n e d , i n c l u d i n g i n s t r u m e n t c h a r a c t e r i s t i c s , t h e need f o r a d e q u a t e checking and v e r i f i c a t i o n , and t h e importance of t r a v e l l i n g speed, a s w e l l a s t h e methodology f o r d a t a a n a l y s i s . The i n t e r n a t i o n a l Roughness Index ( I R I ) i s d e f i n e d , and t h e programs f o r i t s c a l c u l a t i o n a r e provided. The I R I i s based on s i m u l a t i o n of t h e roughn e s s response of a c a r t r a v e l l i n g a t 80 km/hi t i s t h e Reference Average R e c t i f i e d S l o p e , which e x p r e s s e s a r a t i o of t h e accumulated s u s p e n s i o n motion of a v e h i c l e , d i v i d e d by t h e d i s t a n c e t r a v e l l e d d u r i n g t h e t e s t . The r e p o r t e x p l a i n s how a l l roughness measurements can be r e l a t e d t o t h i s s c a l e , a l s o when t r a v e l l i n g a t lower speeds t h a n 80 km/h. The I R I t h e r e f o r e emerges a s a s c a l e t h a t can be used b o t h f o r c a l i b r a t i o n and f o r comparative purposes. iii ACKNOWLEDGEMENTS These g u i d e l i n e s have t h e i r t e c h n i c a l f o u n d a t i o n s i n t h e p u b l i s h e d f i n d i n g s of two major r e s e a r c h p r o j e c t s :

Chapter 6 Nondestructive Tests in Highway Engineering

2018

In highway engineering, one needs to know the information about the thickness and elastic modulus of each pavement layer. The thickness and elastic modulus of each pavement component then become input to elasticity analysis or finite element computation to calculate the service life of the highway. An application was Multichannel Analysis of Surface Waves (MASW) measurement on highway in North Jakarta. The measurement was carried out on highway traffic, because we were not allowed to stop traffic of one of the busiest roads in Jakarta. The street is heading to Tanjung Priok, the port of Jakarta. However, we acquired fairly good data by applying stacking method. The number of stacking was 10 (ten) to overcome traffic noise. After inversion, we came up with the result of MASW measurement of the pavement. The result of MASW measurement in terms of elastic modulus and thicknesses of pavement layer becomes important input of finite element analysis to compute fatigue damage of pavement c...

A Review Paper on Test's conducted for Road Pavement

Concrete Road design has become increasingly important for concrete road propulsion over the years. Motivated by high investment costs, the benefits of low maintenance coverage over the longest service life must be demonstrated prior to construction. It has crack resistance, tensile strength, and brittle fracture mechanism during tension. Due to these undesired properties of concrete, reinforcements are generally provided with steel rods that are placed on the concrete structure in the right place to withstand the applied tensile and shear stresses. In this task, experimental work is tried and performed to determine the results.

Field Evaluation of Pavement Instrumentation Methods

Full-soak testing was conducted to compme the performance of differelt m ~itu instrumentations used ia ~ pavement, including strain gages, pressure cells, ~, ~ imglelayer deflectomete~. Two test sections were ins truatet~: one thin section ( |5.2 cm [6 m. thickl) and one thick section (25.4 cm [10 in. thick]). Each sectiolt is 15.2 m (50 ft) long. The testia$ vwiabtes included pavement !ructur¢, load, tire pressures, mid ~peolL The criteria for evaluatkm of performance of the instrameatt imchtded survivability, ~ty, reliability, the effect of test VlgidM~, ease of mstallation, and data processing, The measured geipm~ trader different conditiom Ms compared with the cak'ulated ~ using a multi-layered ehmlic model, Falling weight defl)ectomet~ 0~/D} testing was used to quantify the in situ malerial IWOpegt~ aceded for the computer model. lnstrumcntlida for Flexible Pavearents-F'ild Ptrlona~acc of Sclected Sclarr." PTI Report No. 9015. Pennsylvania Trupport a t m I m t i m . Nw. 1989. Geophone Ciatrnl Infomation, No. 3M 882. Mark Produas. inc.. Houston. Tex.