Resources

Applicability of precast concrete pavement (PRCP) with doweled joints to tunnel roads was investigated. The effects of subbase and dowel bars at transverse joints on the mechanistic behaviors of PRCP were examined. The thermal stresses in PRCP were also discussed. Fatigue and faulting analyses were conducted to compare the fatigue...

In the case of roller-compacted concrete pavements (RCCP) in spacious site like yard, harbor and so on, socalled fresh joint technique at longitudinal joints is widely used in order to achieve high load-transfer efficiency. However traditional fresh joint technique allowed the limited length of placing, because delay between the fresh...

The use of local aggregates of limestone nature for the producing of road cement concrete leads to obtaining numerous technical - economic advantages. Romania owns great limestone resources (over 3 milliards tons with an ensurance degree up to 999 years) smoothly spread over the entire surface of the country. In...

Continuous reinforced concrete (CRC) pavements built in France since this technique was first used in 1983 have pratically all been designed in the same way as pavements consisting of dowelled slabs. Owing to the circular form of the test tracks at fatigue facility of the Laboratoire Central des Ponts et...

The paper deals with a low cost method to establish the porosity - depth distribution in porous concrete pavement using cylindrical 100cm cores samples. The outcome is a graph representing the porosity in function of the depth below the surface. The method is non destructive with regard to the core...

FCC (Paver Compacted Concrete) is laid with conventional road payers equipped with special screeds, namely with High-Power Compaction Screeds. The main difference compared with other concrete technologies primarily used in nowadays road construction (slipform paving) is that FCC is compacted from the surface with tamping, vibrating and pressing compacting systems....

This paper presents the partial results of a research on Rolled Compacted Concrete (RCC) which aimed at characterizing its fatigue behavior. The influence of cement content (120, 200 and 280 kg/rn 3 ), the mixture aggregate grading (fine, medium and coarse) and the compaction energy (normal Proctor, intermediary and modified)...

Since 1975, the year in which the first continuous concrete plant was introduced for a road construction project, the use of a continuous production process has become more widespread, and even generalized, in France. Applications in other European countries have started to appear, yet do remain in the nascent stages....

The last decade, the technology to design concrete mortars with a high compressive strength have evolved tremendously. The strength of concrete has progressed upto strength values of 130 Mpa. The development of high strength concrete can give the traditional pavement construction techniques a new impulse. Due to the relatively short...

The durability of different kinds of cement i.e. PC 45 and PC 55, slag cement (SC) and alkali activated slag (AAS) has been investigated. The mortar were cured in a strong chloride solution and the expansion and strength were measured. Additionally, the frost resistance was tested according to ASTM Standard....

At the Research, Development and Consulting Department of the Heidelberger Zement AG, a research project has been carried out on the influence of the composition and compaction on the properties of roller-compacted concrete. At a low compaction rate of only 96% of the modified proctor density, roller compacted concrete containing...

In Japan, hydro-electrical power plants are existing at approximately 1,800 places, but more than a half of such plants have been used over sixty years since the commencement of operation. Water channels that lead water, taken in from head areas, to hydro-electrical power plants are called the "headrace tunnel." The...