Construction

A new means for rehabilitation of severely cracked concrete slabs is a thin overlay of SIFCON (Slurry Infiltrated Fibre Concrete). This high strength concrete with an extremely high content of conventional steel fibres (about 10 % of volume) was invented in the USA and further developed by the central laboratory...

This report details the reconstruction of 12,500 m 2 of 7.5*7.5*0.4m concrete slabs on the Madrid-Barajas airpoi't apron, using high performance and rapid setting concrete (HPRSC). HPRSC is an ideal concrete for this type of repairs, given that within six hours of placing the slab is able to bear its...

Porous concrete is mainly used to prevent problems of water stagnation between a concrete pavement or a block paving surface and the base. In the new tender specifications SB 250 of the Flemish Region, requirements concerning porous concrete have been introduced, in particular • a percentage of voids of between...

An industrial pavement with high durabilily iequiieiiieiils iiiade with "semi-continuous concrctc", high performance concrete with low cost materials and equipment is described.

The acceleration wave of the vibrating compactor under work is disturbed from the sine wave. In this research, the disturbance of acceleration wave was defined as degree of disturbance WD, the relation between compacting time, hearing capacity of ground, consistency of concrete, compaction degree of concrete, strength of concrete and...

This paper describes the processes carried out in the crack and seat of an existing concrete pavement on the M40 Motorway in England.

Although the quality of the surface-deactivator is very important, the surface-deactivator will only react to the quality of the concrete onto which the surfcedeactivator is applied to. Therefore the surfacedeactivator will not be able to compensate for segregations, unsuitable concrete mix-designs or mistakes in application, etc. It is always recommended...

Many roads in Belgium, both main and secondary, are in need of modernisation or repairs. The surface area of old concrete pavements that are thus concerned on an annual basis is estimated at approximately half a million m2 . The inconvenience to the user caused by this type of work...

The stiffening time of cement is a feature whose potential can be better exploited at function of each specific use of concrete. The possibility of control of this feature is useful, as much to get a better concrete performance at function of the each work peculiarities, as to correct behaviour...

In order to harmonize FWD condition surveys on concretee pavements in the Netherlands, CROW's committee UEC1 has developed an structural evaluation procedure for jointed concrete airfield pavements. The committee has developed procedures for in-situ testing and models for determining of the mechanical pavement properties based on FWD measurements. With respect...

Opening concrete pavements to traffic the day after placing has been a routine practice in Vienna for many years, but increasing traffic requires even shorter closure times. On motorways even a single lane can be closed to traffic only at night or at weekends. With a w/c of 0,35 and...

The authors present a synthesis of the results obtained on 3 test sections where cold-milled bituminous concrete has been recycled for the reconstruction of the stabilized base for medium trafficked roads. The inert skeleton for the base was made from 85% (by weight) milled material and 15% sand, this in...