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Urban Road Pavements the Landscaped Pavement Concrete

Conf-paper-iscr

The new concept of the urban fabric is taking on extension and is testifying increasingly to the fact that in our cities the street is not a road. Cement concrete designs have been staying abreast of these developments and architectural concrete is just one of the significant outgrowths of these...

Quality Assurance of Construction Materials For Concrete Roads in Germany

Conf-paper-iscr

Heavy use of the pavements caused by traffic, cli-mate and winter service requires a highly resistantconcrete with high flexural strength. Correspon-ding requirements on road concrete are laid downin «Additional Technical Instructions for Cons-tructing Concrete Pavements» (ZTV Beton), partlyalso requirements on some concrete basicmaterials.All materials used for construction of concretepavements have...

Ultrasonic Method in Concrete Road Testing

Conf-paper-iscr

To determine the concrete strength in road surface the authors have applied an ultrasonic method. In this method ultrasonic transducers are imposed to the upper surface of the pavement slab. The distance between the transducers is constant. Next propagation time of longitudinal ultrasonic wave is measured. The time of propagation...

5th International Symposium on Concrete Roads 1986 Aachen Germany

Conference-report

Closing ceremony from 5th International Symposium on Concrete Roads 1986 Aachen Germany

5th International Symposium on Concrete Roads 1986 Aachen Germany

Conference-report

Indexes, General Reports and Additional Contributions from 5th International Symposium on Concrete Roads 1986 Aachen Germany

5th International Symposium on Concrete Roads 1986 Aachen Germany

Conference-report

Index of Papers and Opening from Addresses from the 5th International Symposium on Concrete Roads 1986 Aachen Germany

Use of cement-bound industrial wastes and recycled materials in earthworks and road construction

Conf-paper-iscr

For environmental reasons, it is becoming increasingly difficult and eherefore expensive to find fresh sites for wasee disposal. Investigations have shown that coal fly-ash, refuse incinerator grate ash, demolished road asphalt and concrete rubble can, when suicably treated with cement, be economically reused for road construction, for which purpose they...

Use of new road materials (industrial wastes) in mixes for sub-bases

Conf-paper-iscr

The replacement of traditional aggregates (limestone) by crushed blastfurnace slag or LD steelmaking slag in lean concrete and in cement-stabilized hardcore was investigated. The effect of adding fly-ash to mixes of the conventional type was also studied. For mixes of equal composition (in parts by volume) and equal grading (by...

Erosion of concrete pavement sub-bases

Conf-paper-iscr

A special session of the 65th annual meeting of the Transportation Research Board in Washington, in January 1986, brought together some 50 practitioners and research workers on the theme "Erosion of sub-bases; stepping of slabs and pumping of concrete pavements"; ~he presentation of 3 U.S. papers and two French ones...

Development of the technological concept for roadbases made of hydraulic bound granular materials in the Federal Republic of Germany

Conf-paper-iscr

A number of research projects relating to the cementbound sub-base (CBSB) are currently in progress in the Federal Republic of Germany. Their object is to develop an optimized technological approach with a view to further improvement and even greater economy in the use of this well proven form of construction....

Experiences with sand-cement stabilization in road construction

Conf-paper-iscr

At Hamburg, sand-cement stabilization (SCS) conseructed by the central-mixed (stationary plant) method is successfully used for frose-protection courses. The requirements applicable to these courses, which as a rule are 15 em thick, are based on those for cementbound sub-bases as laid down in the TVT regulations: degree of compaction ~98%,...

Mix design and properties of lean concrete for sub-bases

Conf-paper-iscr

The principal criteria applicable to the mix design and the properties of lean concrete are: - splitting tensile strength in the region of 1.7 MFa and compressive strength in the region of 15 MPa at 28 days; - good erosion resistance; - lowest possible modulus of deformation; - possibility of...